EASA Exam: Module 2 Physics Question

EASA : Module 2 Physics Question - Answer



  • If a fluid moves slowly it has = high viscosity

  • In a fiber optic flying control system = the sensor and the transmitter require electrical power 
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  • Photons in a semiconductor are stimulated to produce excess photons to be emitted. This is a = laser diode
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  • In a fiber optic flying control system, which of the following are used = multi-mode
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  • A fiber optic cable is attenuated at 29 dB/meter. This is referring to = the figure allowed when calculating power gain
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  • The fiber optic receiver is a = photodiode
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  • Regenerators are used in fiber optic systems to reduce = attenuation
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  •  An atom consists of = protons, neutron and electrons
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  • The maximum number of electrons in the inner shell of an atom is = 2
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  • A good refrigerant has = high condensing pressure, low evaporating temperature
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  • Stress is given by = force per unit area
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  • An object accelerating down a slope would gain kinetic energy = equal to the potential energy lost
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  • Quality of sound depends upon = frequency and harmonics of the waves being produced
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  • Temperature is a measure of = the amount of vibration of particles
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  • In a heat pump = the condenser loses heat
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  • Precession in a gyro is = proportional to the magnitude of the torque applied
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  • Particles vibrating in air = produce waves
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  • The force which opposes twisting deformation is = torsion
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  • A gyro with a fixed point free to rotate in three axis is = a tied gyro
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  • When light rays enter a medium with a different refractive index they = change speed
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  • A converging lens can focus light rays because = it is a sphere
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  • The mass of a proton equals the mass of a = neutron
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  • A force perpendicular to a beam produces what type of stress? = shear
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  • What temperature scale is used with the combined gas law? = Kelvin
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  • If a ray of light enters a fiber optic cable with a refractive index of 1.5, what is the speed of the ray in the cable? = 200,000 kilometers per second
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  • A graded index fiber optic cable has = a variable refractive index across its cross sectional area
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  • Which of the following will not transmit pressure? = solid

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  • Charles' Law states that = volume varies directly with temperature
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  • Boyle's law states that = pressure varies inversely with volume
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  • Convection does not occur in = solids
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  • A mirror = absorbs a percentage of light
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  • If the outer shell of an atom is full the element is = practically inert
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  • Which law describes the relationship between potential energy, kinetic energy and pressure = Bernoulli's law
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  • Molecules of the same compound are held together by = cohesive forces
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  • The width of a multimode fiber optic cable is = 100 µm
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  • The fundamental frequency is the = 1st harmonic
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  • The first overtone of a sound wave is the = 2nd harmonic
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  • Oxygen has a valences of = 2
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  • A process where volume does not change is = isochoric
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  • A process where heat is not transferred to or from a gas is = adiabatic
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  • A varying refractive index is a = graded index
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  •  The further from the nucleus the shells are in an atom = the further the shells get from each other
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  • What determines an element's identity? = The number of protons
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  • An isotope of an element will have more = neutrons
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  • Refractive index is = the speed of light in air divided by the speed of light in the medium
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  • The smallest part of an element is = an atom
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  • A process where pressure does not change is known as = isobaric
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  • The extension of a spring can be determined using = Hooke's Law
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  • The nucleus of an atom contains = protons and neutrons
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  • What is the speed of light in km/s = 300,000
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  • What is the boundary layer? = The layer of still air (due to friction) around the aircraft skin
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  • What is atomic mass? = Number of protons plus the number of neutrons
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  • An aircraft flies 1350 nmiles in 2h 15mins. What is the average speed = 600 nmiles/hour
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  • A spring extends 7 cm to the ground and back again 20 times a minute. What is the period? = 3 seconds
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  • A solid melted into a liquid will take up = less space
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  • A cyclist goes from rest to 50 m/s in 5 seconds. What is the average acceleration? = 10 m/s2
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  • What form of heat is used to turn a solid into a liquid? = heat of fusion
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  • When a steel bar is overstressed, what is the name of the point at which it does not return to its original form after the load is released? = yield point
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  • When a liquid is heated, it expands = more than a solid
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  • If pressure on a liquid increases, whilst temperature is held constant, the volume will = remain constant
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  • What is 1 btu in joules per kilogram = 2346 j/kg
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  • Two pure tones of similar frequency are heard by a person. What will they hear? = A beat of the two tones
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  • If you push an object with a force of 5 N for 10 m in 4 seconds, how much power is used? = 12.5 watts
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  • The focal point of a mirror is = 1/2 the radius
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  • 2 couples with magnitude F act against each other. The resultant will be = 0
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  • The height of mercury required to give 1 bar is = 760 mm
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  • A vessel has 25 ml of water which produces 10 kPa. If another 125 ml of water is added, what will be the pressure in the vessel = 60 kPa
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  • 2 hydraulic jacks with different diameters have the same fluid pressures entering at the same rate. They will extend at = different rates
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  • The standard for measuring pressure is = +20oC and 760 mm of mercury
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  • What load can be lifted on jack B? = 100N
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  • What is the period of a frequency of 4 Hz? = 0.25 seconds
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  • A dot rotates around the circumference of a circle. If the vertical position of this dot is plotted on a graph with respect to time the result will be = a sinusoidal waveform
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  • A process where temperature remains the same is known as = isothermic
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  • What is Boyle's Law? = P is proportional to 1/V
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  • Dew point is = the temperature that condensation occurs when cooling a gas
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  • What is the speed of light in air at 0°C = 300 m/µs
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  • A process where heat is not transferred to or from a gas is known as = adiabatic
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  • How far will light travel in one year? = 9.46 x 1015 m
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  • Two sound waves of the same frequency and amplitude are moving half a wavelength out of phase with each other. What will be heard? = Nothing
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  • Water is most dense at = +4oC
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  • Which type of circuit is used when the temperature of the source has insufficient heat for thermocouple application? = Thermistor
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  • The most common method of expressing pressure is in = pounds per square inch
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  • The difference between two pressures is = differential pressure
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  • The impact pressure caused by the impression of air against the opening of a = pitot-tube is pitot pressure
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  • Static pressure is present in = undisturbed air
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  • What torque loading would you apply to a nut if the force is 50 lbs, exerted 2 feet from its axis? = 100 lbs.ft
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  • When different signals are transmitted down a fibre optic core, are they distinguished by a = passive filter
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  • A force of 10 million Newton's is expressed numerically as = 10,000 KN
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  • The SI unit of energy is the = Joule (J)
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  • The heat required to change a liquid to a gas is called the heat of = Vaporization
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  •  An atom with 3 free electrons is said to be = Trivalent
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  • The specific gravity of a substance is calculated by = the density of the body divided by the density of water
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  • The most common refrigerants are = Water, ammonia, Freon
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  • In fiber optics the type of cable is chosen by = Distance required to travel
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  • What is the kinetic energy of an aircraft of mass of 2 metric tons and has a velocity of 2m/s? = 4 kJ
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  • What is the mass number of an element?  = Number of neutrons and protons
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  • What is the momentum of a ball of mass 2 grams and has a velocity of 10cm/s = 0.0002 kgm/s
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  • What do you get when you add 2H2 and O2 = 2H2O
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  •  A time period of 10 microseconds is equal to a frequency of = 100 kHz
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  • When heat flows from a hot area to a cold area it is called = Conduction
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  • The specific heat capacity of a gas heated at constant pressure, when compared to the specific heat capacity of a gas heated at constant volume, is = More
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  • A gyroscope suffers from apparent wander. This is due to = The earth's rotation
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  • The splitting of a chemical compound is called = Analysis
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  • The quadrature component of a vector is =  90oto the original
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  • 1 Newton is equal to = 1 kilogram meter per second per second
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  • 1 degree rise on the centigrade scale will cause a = 1.8 degree rise in Fahrenheit
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  • Adiabatic compression is when = No heat is lost or gained
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  • You add 2 vectors together. The 3rd vector you get is called the = resultant
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  • What is the atomic number of an element? = The number of protons in the atom
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  • An atom with 5 free electrons is said to be = trivalent
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  • The heat required to change a solid to a liquid is called the heat of = fusion
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  • The SI unit of acceleration is the = meter per second squared (m/s2)
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  • The SI unit of density is the = kilogram per cubic meter (kg/m3)
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  • Latent heat is the = heat required to change the state of a body
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  • 1 Calorie is equal to = 4 J
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  • 1 BTU equals = 1055 Joules
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  • The intensity of radiated heat is = inversely proportional to the square of the distance from the source of the heat
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  • As a block of ice is melted (to 4oC) its volume = decreases
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  • A material with a gradually varying refractive index is said to have a = graded index
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  • A slug is a unit of = mass
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  • If an object in air is submerged in a liquid or a gas its weight will = remain the same
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  • As an object slides down a slope, its = kinetic energy increases and its potential energy decreases
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  • If a body starts at rest and reaches 84 m/s in 3 seconds, its acceleration is = 28 m/s2
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  • The speed of sound in air at 0oC is approximately = 331 m/s
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  • If a material is loaded excessively and is permanently deformed, it is said to be = strained
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  • The height of water required to produce a head pressure of 1 bar is = 10.19 m
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  • The SI unit of pressure is the = Newton's per meter squared (N/m2)
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  • The SI unit of force is the = Newton (N)
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  • The SI unit of velocity is the = meter per second (m/s)
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  • The SI unit of momentum is the = kilogram meter per second
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  • The formula for calculating stress is = load divided by cross sectional area
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  • A gauge indicates 15 PSIG. What is the absolute pressure? = 30 PSI
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  • Fiber optic cables are capable of transmitting light at = 1.99 x 108 m/s
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  • Step index fibers suffer from = dispersion
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  • Attenuated pulses have their sizes and shape restored by = regenerators
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  • Attenuation in fiber optic cables is caused by = absorption and scattering
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  • If a wave traveling to a point meets a wave traveling from that point, of equal frequency = a standing wave is formed
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  • For a concave lens the image is = virtual
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  • What shape is a venture tube? = Minimum cross sectional area in the center

  • In a jack with a ram only on one side and hydraulic fluid applied from both sides = the ram will move to the side where the ram is, due to pressure acting on differential areas
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  • Using the same hydraulic pressure, the force applied by a hydraulic jack of 4 sq inch piston area = will be twice that applied by a similar jack of 2 sq inch piston area
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  • A pressure of 100 psi act on two jacks in a hydraulic system piston area 2 sq in and 4 sq in = the smaller jack will exert a force of 200 lb and the larger a force of 400 lb
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  • on an Optical Time Domain Reflectometer (OTDR),the attenuation is = read from the cathode ray display
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  • The purpose of an accumulator in a hydraulic system is to = store hydraulic fluid under pressure
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  • If the hydraulic system accumulator has a low air pressure, it will cause = rapid pressure fluctuations during operation of services
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  • The specific torque loading for a bolt is 50 lbs.ins but an extension of 2” is needed to reach the bolt in addition to the 8” torque wrench. What will the actual reading? = 40 lb.ins
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  • If 1500 psi hydraulic pressure is pumped into an accumulator, with a pre-charge air pressure of 1000 psi the gauge will read = 1500 psi
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  • A compressor increases = potential energy
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  • P1 x V1 / T1 = P1 x V2 / T2 is = Ideal gas law
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  • V1 / T1 = V2 / T2 at a constant pressure is = Charles' law
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  • P1 x V1 = P2 x V2 at a constant temperature is = Boyle's law
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  • Change from solid to gas state without going through liquid state is called = sublimation
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  • 1 CHU = Centigrade Heat Unit = 1400 ft lbs = energy to raise = 1 lb of water by 1° C
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  • 1 BTU = 778 ft lbs to raise = = 1 lb of water to heat up by 1° F
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  • 1 HP = 33000 ft lbs / min or 500 ft lbs / s or = 746 Watts
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  • 1 Watt = = 1 Joule/s
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  • Temperature change -1.98°C per 1000 ft up to 36,000 ft where it remains constant at = - 56°C
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  • A freely falling body, falling from a height of 2km, and assuming g = 10m/s2, will strike the ground in a time of = 20s
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  • What is the angular velocity of a shaft rotating at 300rpm in radians/second? = 10pi radians/second
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  • If a machine has a mechanical advantage of 10 and a velocity ratio of 20, the efficiency of the machine is = 0.5
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  • The force that acts on a body to cause it to rotate in a circular path is called the = centripetal force
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  • A temperature of 41 degrees Fahrenheit is, in Centigrade is = 5 degrees
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  • Heat is defined as = energy in transit
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  • An aircraft of 2 metric tons uses 800 kilojoules kinetic energy to make an emergency stop. Its brakes apply a force of 10 kiloNewtons. What distance does it travel before it comes to a stop? = 80m
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  • What is the smallest particle of matter that can exist in nature? = An atom
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  • A positive ion = has missing electrons
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  • Radiant heat = heats up the intervening medium
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  • A pilot requests 9.2 tons of fuel. The bowser driver reports to the pilot that the specific gravity is 0.8, what will the uplift be? = 11500 liters
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  • A molecule with like atoms is said to be a = element
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  • Specific gravity is measured in = is measured in Kg/m3
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  • Two elements in the same substance is said to be a = compound
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  • A mass on a spring nearly hits the ground 20 times a minute, its frequency is = 1/3 cycle per second
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  • A process where heat is given off to its surroundings is called = Isothermal
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  • A body travelling at 20 m/s accelerates to 36 m/s in 8 seconds, what is its acceleration? = 2 m/s2
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  • Temperature is a measurement of the = amount of vibration in particles
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  • A converging lens can focus because = it’s surfaces are spherical in shape
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  • In a flat surfaced mirror, the angle of reflection is = equal to the angle of incidence
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  • A body which is allowed to expand when heated, expands past the pressure imposed on it and = work is done
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  • A body dropped from 10 m will hit the ground in = root 2 seconds
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  • 600K is equal to = 326.85°C
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  • The number of protons in an atom is equal to the number of = electrons
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  • The charge of an electron is = negative
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  • In a fiber optic flying control system = the sensor does not require electrical power
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  • In a multimode fiber optic cable, the = diameter is greater than the wavelength
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  • Quality of sound is dependent on = number and pitch of harmonics
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  • A mass on a spring nearly hits the ground 20 times a minute. Its time period is = 3 seconds
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  • A mass of 400kg moves 27 meters with a force of 54N. What is the work produced? = 1458J
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  • When gases change temperature/pressure, the scale used is = Kelvin
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  • A valance electron is an electron = in the outermost shell
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  • Molecules of unlike atoms are combined by = adhesive force

  • There are solids, liquids and gases present in the universe and every unit of theirs occupy some space. This is called = matter
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  • A material capable of going direct from solid to gas is a = sublimate
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  • A particle vibrating in air produces = a wave
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  • The composition of the atmosphere is approximately = 1/5 oxygen and 4/5 nitrogen
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  • Transfer of heat from a hot area to a cold area is = conduction
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  • An atom has three electrons in its outer shell. It is = trivalent
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  • A ram has a piston with 2 sq.in2. Another ram with a piston of 4 sq.in2will = double the force 
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  • An atom deficient of a valences electron is deficient = of an electron in the outer shell
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  • The maximum number of electrons in the second shell is = 8
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  •  What is meant by adiabatic? = No heat crosses the boundary
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  • What does an oxygen atom consist of? = Protons, neutrons and electrons
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  •  What type of fiber optic cable is used on aircraft? = Multi mode
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  • Surface molecular attraction between two different molecules is = adhesive
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  • The atomic mass number is the number of = protons plus neutrons
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  •  An object travels 18 km in 1 minute 30 seconds. What is its average speed? = 200 m/s
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  • Ignoring friction, if you let an object slide down a slope, at the bottom = the kinetic energy is more than the potential energy
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  •  A pile driver of weight 1000 kg, hits a post 3 m below it. It moves the post 10 mm. Assuming gravity = 10 m/s2, what is the kinetic energy of the pile driver? = 30 kJ
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  •  What frequency is a tone which is 4 times the fundamental frequency? = 3rd overtone
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  •  What is the standard temperature and pressure for measuring the density of gases? = 0°Cand 760 mm of mercury
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  •  If a gas is heated and its temperature is raised by 1K what happens to its volume? = Increases by 1/273
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  • If a block of ice melts in a glass of water, the level if water in the glass will = fall
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  •  How much force is exerted by piston if it is subjected to a pressure of 3000 psi and has surface area of 2.5 m2? = 7500 N
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  • Intensity of sound waves = varies inversely as the square of distance from source
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  • Ten kilograms is expressed numerically as = 10 kg
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  •  A force of 10 million Newton’s is expressed numerically as = 10 MN
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  •  A milliliter is equal to = one thousandth of a liter
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  •  If a square has an area of 9m2, the side is = 3 m
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  •  A mass of 3kg weighs approximately = 6.6 LB
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  • 100 m is approximately = 109 yards
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  • A car moves over a distance of 5 miles at steady speed in 10 minutes. What is the speed? = 30 mph
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  • A spaceship travels a distance of 480,000 miles in 2 days. What is its speed? = 10,000 mph 
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  •  A cyclist covers a distance of 1,000 m at a constant speed in 90 seconds, what is his speed? = 12.5 m/s
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  •  How long will it take a car moving at 60 km/hr to travel 90 km? = 90 minutes
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  •  An aircraft travels at 500 km/hr for 30 minutes at steady speed. How far does it move in that time? =250 km

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  • What is the difference between hydrogen, deuterium and tritium? = The number of neutrons
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  • The smallest material in the universe is = hydrogen
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  • What is the atomic number? = 3
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  • What is the mass number? = 5
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  • What is the rate of gravity? = 9.81 m/s2
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  • Convert 100oC to Kelvin = 373K
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  • What is 1 joule in calories? = 0.239
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  • Young's modulus is? = stress / strain
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  • The isotope of a carbon atom C14 to C12 will have = same numbers of protons
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  • If an atom have 2 protons, how many electrons will it have = 2
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  • 1kg of water is heated from 0oC to 2oC. Does its volume = decrease
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  • A fire engine is approaching you with its siren on. As it passes you does its pitch = decrease 
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  • A body rotating at an angular velocity of 5 radians/sec, with a radius of 5metres has a speed of = 25 meters per second
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  • A mass of 400 kg moves 27metres, with a force of 54N, what is the work produced = 1458 J 
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  • A cylinder filled with water to half a meter will exert a pressure of = 4900 pa
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  • A mass of 10kg placed 2 meters away from a pivot will have a moment of = 196 NM
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  • 25 liters of fuel exerts a pressure of 10KPa, if a further 125 liters is added, the pressure will now be = 60KPa
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  • The quantity of heat developed by burning 1 kg of fuel is known as = heat of combustion
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  • The transfer of heat through radiation is achieved by = the application of radioactive isotopes
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  • 1 kW is = 3413 btu per hour
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  • 1000 lb/in2 is in an accumulator. If 3000 lb/in2 of hydraulic fluid is pumped in, what is the pressure on the air side? = 3000 lb/in2
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  • A converging lens converges light rays because = the light waves move slower in the centre of the lens than they do at the extremities
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  • Coded light waves of varying wavelength travel down a fiber optic cable. To separate them at the other end you would use = a passive filter
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  • - 40°C in Fahrenheit is minus = - 40°F
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  • Absolute zero is = - 273.15°C
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  • A 4.5 kW electric motor is 90% efficient. How much energy does it use in 20 seconds? = 100 kJ
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  • An optical fiber has attenuation. When using an OTDR = dial in the known attenuation
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  • One degree on the Centigrade scale is equal to what on the Fahrenheit Scale = 1.8°F
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  • The dew point is = the point when air is cooled at which the moisture just starts to condense 
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  • What are common refrigerant agents? = water, Freon, ammonia
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  • During a process of gas heating, no heat is absorbed or given out.
  • It is = adiabatic
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  • During a pressurizing process, all heat is given away. It is = isothermal
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  • A fractional decrease in volume of a material when it is compressed is = bulk modulus

  •  Which of the following affect the velocity of an object? = Speed and direction
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  •  Acceleration involves = change in speed or direction of movement
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  •  What acceleration is produced if a mass increases speed from rest to 10 ft/sec in 5 seconds? = 2 ft/sec2
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  •  A car traveling at a speed of 5 m/s accelerates at the rate of 1 m/s2. How long will it take to reach a speed of 20 m/s? = 15 secs
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  • Newton’s laws of motion apply to = all substances irrespective of state
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  • Which of Newton’s Laws apply to an aircraft which is accelerating down a runway? = The 2nd law
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  • Which of Newton’s Laws apply to a car which is slowing down due to the braking action? = The 2nd law
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  •  F = ma is an equation which expresses = Newton’s 2nd law
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  •  What force is required to produce an acceleration of 5 m/s2 on a mass of 2 kg? = 10 N
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  • The British unit of mass is = the slug
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  • If a force of 10 lbf produces an acceleration of 2.5 ft/sec2 on what mass is it acting? = 4 slugs
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  • What is acceleration? = Rate of change of velocity
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  • Power is the rate of doing work, it is measured in = Joules/Seconds
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  • Fahrenheit may be converted to Celsius by using the equation = C° = 5/9 x (F° - 32)
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  •  A vector quantity is a quantity which = possesses sense, magnitude and direction
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  • One atmosphere is equal to = 14.7 lbf/in2
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  • Strain is calculated by = Extension ÷ Original Length
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  • In a gear train the Driver has 100 tpi and the Driven as 50 tpi. = The driven rotates twice as fast
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  • In fiber optics. The fiber cable has a refractive index of 1.5, what is its speed? = 200 meters/microsecond
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  • A catalyst in a chemical reaction does what? = Speeds it up
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  •  A material, which has a varying refractive index has a = step index
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  • What is the number of electrons in the inner shell of an atom? = 2
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  • What form of heat is used to turn a solid into a gas? = Latent heat
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  • When a twisting force is applied to a bolt, what stress is exerted on to the head? = Torsion
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  • When you over stress a steel bar, what is the point called where it does not return to its original form? = Elasticity limit
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  •  A cyclist goes from rest to 50m/s in 5 sec, what is the average acceleration? = 10m/s
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  •  If heat is constant, if pressure increases on a liquid what will the volume do? = Remains constant
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  • What shape is a venturi tube? = Narrow in the middle
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  • What is 1 BTU in joules per kilogram? = 2326 joules per kilogram
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  • Radiant heat of a body, heated from a radiant source is = inversely proportional to the square of the distance
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  • A ray of light that travels through the center of curvature before being reflected, how is it reflected? = Reflected through the focal point
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  • What will the image produced through a divergent lens be? = Virtual
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  • When a beam of light passes from one medium to another with a different refractive index, what will happen to the beam of light?= Change speed
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  • A fiber optic cable has different refractive indexes across its diameter, it is = graded index
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  • The formula for calculating shear is = force ÷ area
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  • Combined gas law relates volume, pressure and = temperature
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  •  An aircraft of 2 metric tones lands with 400 kilojoules of energy, 10 kiloNewtons of force is applied at the brakes, how far does the aircraft take to stop? = 40 M
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  •  If a car travels 18km in 1 ½ minutes, what is it velocity in m/s? = 200 m/s
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  •  Three common types of refrigerant are = dry ice, freon, ammonia
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  •  The heat required to change a liquid to a gas at constant temperature is the heat of = vaporization
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  •  An atom with a full outer shell is = practically inert
  •  
  •  Light traveling from air to water, the waves are = bent less
  •  
  • A pilot requests 9.2 tones of fuel to be put on board his aircraft. The specific gravity of the fuel is 0.8, how many liters are put on board? = 1158 liters
  •  
  •  An element with a full valence shell is = inert
  •  
  •  A force 10 N is placed 2 Meters from a pivot point, what is the moment? = 20 N.M.
  •  
  • The heat given off by burning a 1kg block of wood is = radiant heat
  •  
  • If a light is beamed at a flat mirror what is the angle it reflects at? = Angle of incidence
  •  
  • In a graded index multi mode fiber is the refractive index = alternates high and low
  •  
  •  A fiber optic cable is attenuated at 29dB/Meter. This is referring to = the figure that has to be allowed for when calculating power gain
  •  
  • The fiber optic receiver is a = photodiode
  •  
  •  The standard temperature and pressure for measuring the density of liquids is = 4°C and 760 mmHg

  • Viscosity is known as = the internal resistance for a fluid to flow
  •  
  • How lift on a wing is produced can be derived from = Bernoulli's Theorem
  •  
  • In a fiber optic system which components use the laser? = Single mode laser for the transmitter
  •  
  • Single mode optic fiber cable will = have diameter matched to wavelength of light passed
  •  
  • When an emergent light wave enters a divergent lens = it will focus behind the lens
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  • in the concave mirror, light rays parallel to mirror axis will be reflected = through the focal point
  •  
  • Protons have = positive charge
  •  
  • If gyro is constrained to an external reference and has three degrees of freedom it is
  • = a tied gyro
  •  
  • in a concave mirror, a light ray passing through the focal point will be reflected = on the centre line of the mirror
  •  
  • A passive sensor = does not require power
  •  
  • Structures designed to withstand compression are called a = strut
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  • 1 Pascal equals = 1 N/m sq.
  •  
  • A vector is a physical quantity which possesses = magnitude and direction
  •  
  • Producing a compound from commonly available materials is = synthesis
  •  
  • Molecules of matter are in constant motion. The amount of vibration or motion is dependent on =temperature
  •  
  • The addition of 2 different vectors to produce a vector is called = Resultant
  •  
  • the angular velocity of 500 rpm is, in rads/seconds is equal to = 16.66 rads/s
  •  
  • The work done in lifting a mass of 2000 kg vertically to a height of 40 meters is = 784.8 kj
  •  
  • If, with a concave mirror the image is placed beyond the center of curvature, the image produced will be = virtual, erect and larger
  •  
  • The power of a lens is calculated from the = reciprocal of the focal length
  •  
  • In a standing wave the point where continuous vibration of maximum amplitude occurs is called the = anti-node
  •  
  • the name given to sounds below that which the human ear can detect, i.e. below 20Hz is =infra sound
  •  
  • The speed of sound in dry air is 331 m/s. In a solid the speed would = increase
  •  
  • A substance of two or more different atoms is = a chemical compound
  •  
  • An atom with 5 electrons in its outer shell is = trivalent
  •  
  • 1 KW is equal to = 1.34 HP
  •  
  • What atmospheric conditions will cause the true landing speed of an aircraft to be highest? = High temp, high humidity
  •  
  • . If a tuning fork is struck and held close to the ear and slowly rotated about the vertical axis, in one rotation how many times is there no sound? = 2
  •  
  • What type of friction requires the greatest force to overcome it? = Static friction
  •  
  • Which of Newton's laws relates to the formula: Force = mass x acceleration = 2nd
  •  
  • A 6000 kg engine is lifted off a wing to a height 0.5 meters and then pushed across the hangar 24 meters. The force required to push the trolley is 12 kN. What is the work done to move the trolley? = 288kJ
  •  
  • What is the phenomenon that occurs when a siren that approaches you, at the point of passing, the pitch decreases? = Doppler effect

  •  The standard temperature and pressure for measuring the volume of liquids and solids is = 20°C and 760 mmHg
  •  
  • Pure semiconductors have = few free electrons
  •  
  •  H20 in what form holds most energy = Steam
  •  
  • If a tensile load is placed on a bar it will = stretch
  •  
  • Compressibility is = strain/stress
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  • A radar rotates 1 revolution each 30 seconds and uses 10J of energy each revolution. How many joules does it use in a day? = 28.8 kJ
  •  
  • The usable bandwidth of a fiber is determined by = the intermodal dispersion
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  • A block of metal is melted. It will = decrease in volume
  •  
  • How would you work out the work done by a machine assuming it is 100% efficient? = Mechanical advantage and input
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  • A block slides down a slope. Assuming there is no friction = kinetic energy is gained at the same rate as potential energy is lost
  •  
  • Specific gravity is = pure numbers
  •  
  • A body of 10 kg is swinging attached at the end of a 2m pole. What is its moment at the bottom? = 196 NM
  •  
  • The transfer of heat from a hot place to a cold place is called = conduction
  •  
  • A light aircraft flies in a semi-circle from point A to point B. If the circle has a radius of 20km and the time taken is 30mins, the average speed is? = 125.7 km/h
  •  
  • The landing speed of an aircraft is 54 m/s. If the maximum deceleration is 3m/s2the minimum length of runway required is = 486m
  •  
  • The number of radians in a semi circle are = pi


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