M3 Electrical Quiz 10 Random Questions Every Time (From 55 Total Questions)

 

Module - 3 Electrical

Quiz

 

1. The rotating part of a motor/generator is called?
   1.   commutator
   2.   armature
   3.   yoke
2. What is the purpose of the capacitor used in a single phase AC motor ?
   1.   Changing direction of motor
   2.   Provides a high starting torque
   3.   Smoothing Troque
3. The controlling phase on a two phase motor is of a ?
   1.   variable amplitude
   2.   fixed amplitude
   3.   direct current
4. In a two-phase induction motor there are ?
   1.   2 poles
   2.   4 poles
   3.   3 poles
5. In a synchronous motor, when the motor is running the slip is ?
   1.   100%
   2.   5%
   3.   0%
6. A capacitor in a single phase motor is to ?
   1.   prevent sparking at the switch
   2.   provide smoothing
   3.   provide a phase shift
7. Calculate the speed of a 400 Hz, 4 pole machine ?
   1.   6000 rpm
   2.   12,000 rpm
   3.   8000 rpm
8. A three-phase motor has the windings ?
   1.   90° apart
   2.   180°apart
   3.   120° apart
9. In an aircraft brushless alternator the armature is ?
   1.   star wound
   2.   delta wound
   3.   in series with the field
10. In a 2 phase generator, what angle are the phases to each other ?
    1.   0°
    2.   180°
    3.   90°
11. The SI unit of capacitance is ?
    1.   Farad
    2.   Volt
    3.   Ohm
12. Germanium and silicon have how many electrons in their outer shell?
    
    1.   8
    2.   6
    3.   4
13. A semi-conductor will have?
    
    1.   two electrons in the outer shell
    2.   four electrons in the outer shell
    3.   eight electrons in the outer shell
14. The symbol “Ω” represents ?
    1.   Watt
    2.   Ohm
    3.   Volt
15. An ammeter is always connected in?
    1.   Series
    2.   Parallel
    3.   Neither
16. A voltmeter is always connected in?
    1.   Series
    2.   Barometer
    3.   Both
17. Ohm’s law states that ?
    1.   R = V + I
    2.   V = I × R
    3.   I = R × V
18. Which of the following is 1 Amp?
    
    1.   1000 mA
    2.   1000 kA
    3.   1000 μA
19. The S.I. unit of magnetic flux density is the?
    
    1.   Henry
    2.   Weber
    3.   Tesla
20. The property of a material to accept lines of flux is called?
    
    1.   retentivity
    2.   reluctance
    3.   permeability
21. What is the SI unit of conductance?
    
    1.   Ohm-metre
    2.   Ohm
    3.   Siemen
22. What is the SI unit of resistivity ?
    
    1.   Ohms
    2.   Ohms/metre
    3.   Ohm metre
23. A thermocouple indicator is basically a type of ?
    1.   millivoltmeter
    2.   milliammeter
    3.   milliohmeter
24. A battery rated at 40 Ah will supply 200 mA for ?
    1.   20 hours
    2.   200 hours
    3.   5 hours
25. Two 12V 40 amp hour batteries connected in parallel will produce ?
    1.   12V 80 ah
    2.   24V 80 ah
    3.   24V 40 ah
26. In a mercury cell the steel casing is ?
    1.   The negative terminal
    2.   the positive terminal
    3.   Neither
27. The electrolyte in a nicad battery is ?
    1.   Cadmium hydroxide
    2.   Nickel hydroxide
    3.   Potassium hydroxide
28. A galvanometer measures ?
    1.   megohms
    2.   milliamps
    3.   millivolts
29. If voltage is 100V, resistance is 25 ohms, what is the current ?
    1.   2500 amperes
    2.   0.4 amperes
    3.   4 amperes
30. In a balanced Wheatstone bridge, across the centre of the bridge there is?
    1.   Current and voltage at maximum
    2.   No current flow
    3.   No voltage present at either end
31. Total resistance in a parallel resistor circuit, of R1 and R2 is ?
    1.   1/RT = 1/R1 + 1/R2
    2.   1/RT = (R1 * R2) ÷ (R1 + R2)
    3.   RT = 1/R1 + 1/R2
32. A 47 kilohm resistor has the following colour code ?
    1.   Orange, Violet, Red
    2.   Red, Orange, Yellow
    3.   Yellow, Violet, Orange
33. The phase difference between current and voltage in a pure inductive circuit is ?
    1.   0°
    2.   90°
    3.   180°
34. The reactance of a capacitor decreases when ?
    1.   Frequency increases
    2.   Frequency decreases
    3.   Capacitance decreases
35. When a conductor moves through a magnetic field, an EMF is induced due to ?
    1.   Electromagnetic induction
    2.   Mutual induction
    3.   Electrostatic induction
36. Lenz’s law states that ?
    1.   Induced current flows only in one direction
    2.   Induced EMF aids the cause producing it
    3.   Induced EMF opposes the cause producing it
37. In a transformer, eddy current losses can be reduced by ?
    1.   Increasing core size
    2.   Using laminated core
    3.   Using solid iron core
38. The primary purpose of a rectifier is to ?
    1.   Step up voltage
    2.   Convert DC to AC
    3.   Convert AC to DC
39. Kirchhoff’s voltage law states that ?
    1.   Total current entering equals current leaving
    2.   Total voltage around a loop equals zero
    3.   Power is equal to VI
40. The instrument used to measure insulation resistance is?
    1.   Voltmeter
    2.   Megger
    3.   Ohmmeter
41. One Picofarad is ?
    1.   1 * 10-6 farad
    2.   1 * 10-12 farad
    3.   1 * 1012 farad
42. Magnetic inclination is the least at the ?
    1.   poles
    2.   equator
    3.   isoclines
43. The unit of flux is the ?
    1.   Ampere turns / metre
    2.   Ampere turns
    3.   Weber
44. The symbol for flux density is ?
    1.   B(capital)
    2.   H(capital)
    3.   ø(phy)
45. If the rate of change of current is halved, mutual inductance will ?
    1.   Halve
    2.   Stay the same
    3.   Double
46. The electromagnetic brake coil in an actuator would be energised ?
    1.   only when the actuator is running
    2.   all the time in flight
    3.   only at the instant of starting and stopping
47. One purpose of a growler test is to determine the presence of ?
    1.   An out-of-round commutator
    2.   A broken field lead
    3.   A shorted armature
48. A series wound DC motor, the field has ?
    1.   many turns of thin wire
    2.   few turns of thick wire
    3.   few turns of thin wire
49. The voltage output of a generator is controlled by ?
    1.   varying the current of the output
    2.   varying the resistance of the output
    3.   varying the current of the field
50. A 6 pole wave-wound generator has ?
    1.   2 brushes
    2.   3 brushes
    3.   6 brushes
51. Commutator ripple can be reduced by ?
    1.   a resistor in series with the armature
    2.   increasing generator frequency
    3.   the use of a ripple filter
52. A shunt motor ?
    1.   is constant speed
    2.   has high starting torque
    3.   gives constant torque with variations in speed

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M2 Physics Quiz 10 Random Questions Every Time (From 55 Total Questions)

 

Module -2 Physics

Quiz

 

1. Which of the following is an example of a Longitudinal Wave?
   1.   Radio Wave
   2.   Sound Wave
   3.   Light Wave
2. In which medium does sound travel the fastest?
   1.   Air
   2.   Steel
   3.   Water
3. Wave length is?
   1.   distance between crests
   2.   distance from trough to crest
   3.   distance between top and bottom
4. Which law states that force equals mass times acceleration?
   1.   Newton’s First Law
   2.   Newton’s Second Law
   3.   Newton’s Third Law
5. The rate of change of velocity is called?
   1.   Speed
   2.   Momentum
   3.   Acceleration
6. The formula for work done is?
   1.   Power × Time
   2.   Mass × Velocity
   3.   Force × Distance
7. The unit of pressure is?
   1.   Joule
   2.   Pascal
   3.   Ampere
8. What is the kinetic energy of an aircraft of mass of 2 metric tonnes and has a velocity of 2m/s?
   1.   2 kJ
   2.   8 kJ
   3.   4 kJ
9. The number of radians in a semi circle are ?
   1.   π
   2.   2π
   3.   exactly 3
10. Which device is used to measure atmospheric pressure?
    1.   Hygrometer
    2.   Manometer
    3.   Barometer
11. When the temperature of a gas increases at constant volume, pressure?
    1.   Increases
    2.   Decreases
    3.   Remains constant
12. The SI unit of heat energy is?
    
    1.   Watt
    2.   Calorie
    3.   Joule
13. Heat transfer through solids mainly occurs by?
    
    1.   Convection
    2.   Conduction
    3.   Radiation
14. The speed of sound is highest in ?
    1.   Liquids
    2.   Solids
    3.   Gases
15. Which color has the shortest wave length?
    1.   Violet
    2.   Green
    3.   Red
16. Which instrument measures relative humidity?
    1.   Thermometer
    2.   Barometer
    3.   Hygrometer
17. Which gas law states that volume is directly proportional to temperature?
    1.   Boyle’s Law
    2.   Charles’s Law
    3.   Avogadro’s Law
18. Regenerators are used in fibre optic systems to reduce?
    
    1.   attenuation
    2.   dispersion
    3.   random emission
19. The density of water is approximately?
    
    1.   0.1 g/cm³
    2.   10 g/cm³
    3.   1 g/cm³
20. Heat transmission by convection is confined to?
    
    1.   solids and liquids
    2.   gases and solids
    3.   liquids and gases
21. The Steam Point of water is?
    
    1.   0 Kelvin
    2.   273 Kelvin
    3.   373 Kelvin
22. A material capable of going direct from solid to gas is a ?
    
    1.   Substrate
    2.   Substance
    3.   Sublimate
23. A compressor increases ?
    1.   potential energy
    2.   moving energy
    3.   kinetic energy
24. A process where temperature remains the same is known as?
    1.   isobaric
    2.   isothermic
    3.   isochoric
25. The instrument used to measure force is called ?
    1.   Spring balance
    2.   Thermometer
    3.   Barometer
26. A body moving in a circular path is said to have ?
    1.   Uniform motion
    2.   Centripetal acceleration
    3.   Linear velocity
27. The product of mass and velocity is ?
    1.   Energy
    2.   Acceleration
    3.   Momentum
28. Which device converts chemical energy into electrical energy?
    1.   Motor
    2.   Battery
    3.   Generator
29. The SI unit of momentum is?
    1.   J/s
    2.   N·m
    3.   kg·m/s
30. Which of the following has maximum inertia?
    1.   A car
    2.   A truck
    3.   A bicycle
31. The force which opposes twisting deformation is?
    1.   torsion
    2.   strain
    3.   shear
32. A millilitre is equal to ?
    1.   one million litres
    2.   one millionth of a litre
    3.   one thousandth of a litre
33. The gyroscopic principle is based upon?
    1.   Newton’s 2nd Law
    2.   Newton’s 1st Law
    3.   Newton’s 3rd Law
34. The SI unit of density is the?
    1.   kilogram per cubic metre (kg/m3)
    2.   Pascal (Pa)
    3.   cubic metre (m3)
35. Convert 220 gallons to litres?
    1.   1000 litres
    2.   48.4 litres
    3.   500 litres
36. How much lift is produced on a wing can be derived from?
    1.   Charles law
    2.   Faraday's law
    3.   Bernoulli's Theorem
37. A good refrigerant has?
    1.   high condensing pressure, high evaporating temperature
    2.   low condensing pressure, low vaporating temperature
    3.   high condensing pressure, low evaporating temperature
38. Boyle's law states that?
    1.   pressure equals temperature divided by volume
    2.   pressure varies directly with volume
    3.   pressure varies inversely with volume
39. 10 BTU is equivalent to?
    1.   63,560 Joules
    2.   10,550 Joules
    3.   570 Joules
40. A wave in which the vibrations are parallel to, or along, the direction of travel is a?
    1.   Upright Wave
    2.   Longitudinal Wave
    3.   Transverse Wave
41. Increasing the Amplitude of a sound wave increases its?
    1.   moment
    2.   loudness
    3.   pitch
42. Quality of sound is dependant on?
    1.   medium it is traveling through
    2.   number and pitch of harmonics
    3.   frequency of the supply
43. The speed of sound in air at 0 °C is approximately?
    1.   181 m/s
    2.   3 * 108 m/s
    3.   331 m/s
44. A Concave mirror is used in?
    1.   headlights
    2.   a periscope
    3.   a rear view mirror
45. The light gathering power of a lens is indicated by its?
    1.   material
    2.   focal ratio
    3.   thickness of the lens
46. Lasers use which source of light?
    1.   Coherent
    2.   Refraction
    3.   Scattered
47. The power of a lens is measured in?
    1.   Lumens per Watt
    2.   Watts
    3.   Diopters
48. The refractive index for air is approximately?
    1.   10
    2.   1
    3.   0
49. The power of a lens is calculated from the?
    1.   focal length squared
    2.   product of the focal length and its distance from the pole
    3.   reciprocal of the focal length
50. The fibre optic receiver is a?
    1.   photodiode
    2.   laser diode
    3.   light emitting diode
51. What will the image produced through a divergent lens be?
    1.   Negative
    2.   Real
    3.   Virtual
52. Temperature is a measure of ?
    1.   the amount of vibration of molecules
    2.   the heat energy of particles
    3.   the amount of friction produced by two mating surfaces

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