electrical engineering Mcqs
1. economics of power generation2. analog electronics3. solid state switching circuits4. parallel circuits5. switchgear and protection6. op amp circuits7. transistor audio power amplifiers8. electrostatics9. heating and welding10. multi stage transistor amplifiers11. passive filters12. network theorems13. regulated d c power supply14. a c fundamentals circuits and circuit theory15. electromagnetic induction16. power electronics17. magnetism and electromagnetism18. transformers19. modulation and demodulation20. d c generators21. semiconductor theory22. single phase induction motors23. semiconductor diode24. hybrid parameters25. digital electronics26. oscillators27. earthing or grounding28. single stage transistor amplifiers29. d c motors30. transistor biasing31. amplifiers with negative feedback32. basic electrical33. electronic instruments34. synchronous motors35. field effect transistors fet36. magnetic circuit37. control systems38. industrial drives39. power generation40. series parallel circuits41. transistor tuned amplifiers42. electrical engineering materials43. rectifiers and converters44. integrated circuits45. scr silicon controlled rectifiers46. cables47. polyphase induction motors48. measurement and instrumentation49. transistors50. electrical machine design51. electrolysis and storage of batteries52. electric traction53. transmission and distribution
6851. Induction type single phase energy meters measure electric energy in_______________?
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A. Wh

B. kWh

C. kW

D. None of the above

E. VAR

6852. The pointer of an indicating instrument should be______________?
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A. either A. or B.

B. neither A. nor B.

C. very light

D. very heavy

6853. Which of the following is an essential part of a motor meter ?
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A. A braking device

B. An operating torque system

C. Revolution registering device

D. All of the above
6854. In majority of instruments damping is provided by______________?
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A. eddy currents

B. fluid friction

C. all of the above

D. spring

6855. A Weston synchronoscope is a________________?
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A. dynamometer instrument

B. moving iron instrument

C. none of the above

D. moving coil instrument

6856. The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a _________________?
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A. three-phase winding

B. two-phase winding

C. single-phase winding

D. any of the above

6857. In an AC. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be_____________?
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A. out of phase by 30

B. out of phase by 90

C. out of phase by 180

D. out of phase by 0

E. out of phase by 60

6858. The use of _________ instruments is merely confined within laboratories as standardizing instruments?
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A. indicating

B. integrating

C. none of the above

D. absolute

E. recording

6859. Operating torques in analogue instruments are_______________?
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A. deflecting and damping

B. vibration and balancing

C. deflecting, control and damping

D. deflecting and control

6860. Instrument transformers are_______________?
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A. potential transformers

B. current transformers

C. both A. and B.

D. power transformers

6861. Resistances can be measured with the help of_______________?
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A. wattmeters

B. ammeters

C. ohmmeters and resistance bridges

D. voltmeters

E. all of the above

6862. The electrical power to a meggar is provided by________________?
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A. any of the above

B. permanent magnet D.C. generator

C. AC. generator

D. battery

6863. A universal RLC bridge uses_________________?
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A. Maxwell bridge configuration for measurement of inductance and De Santas bridge for measurement of capacitance

B. Any of the above

C. Maxwell Wein bridge for measurement of inductance and modified De Santys bridge for measurement of capacitance

D. Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance

6864. A dynamometer wattmeter can be used for______________?
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A. both D.C. and A.C.

B. D.C. only

C. A.C. only

D. any of the above

6865. To measure a resistance with the help of a potentiometer it is_________________?
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A. not necessary to standardise the potentiometer

B. necessary to use a volt ratio box in conjunction with the potentiometer

C. necessary to standardise the potentiometer

D. none of the above

6866. In Weston synchronoscope the moving coil is connected across______________?
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A. any of the above

B. fixed coils

C. bus-bars

D. incoming alternator

6867. In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of_________________?
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A. 0.5 Hz

B. 0.1 Hz

C. 1.5 Hz

D. 0.25 Hz

6868. If an inductance is connected in one arm of bridge and resistances in the remaining three arms____________?
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A. the bridge can be balanced if the resistances have some specific values

B. the bridge cannot be balanced

C. the bridge can always be balanced

6869. In a low power factor wattmeter the compensating coil is connected_______________?
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A. in parallel with pressure coil

B. in series with current coil

C. in series with pressure coil

D. in parallel with current coil

6870. In a dynamometer 3-phase power factor meter, the planes of the two moving coils are at_____________?
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A. 120

B. 90

C. 60

D. 0

6871. In an energy meter braking torque is produced to________________?
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A. bring energy meter to stand still

B. safe guard it against creep

C. maintain steady speed and equal to driving torque

D. brake the instrument

6872. The adjustment of position of shading bands, in an energy meter is done to provide______________?
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A. braking torque

B. friction compensation

C. none of the above

D. creep compensation

6873. In a portable instrument, the controlling torque is provided by_____________?
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A. spring

B. all of the above

C. gravity

D. eddy currents

6874. Which of the following properties a damping oil must possess ?
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A. The viscosity of the oil should not change with the temperature

B. Should be non-evaporating

C. Must be a good insulator

D. Should not have corrosive action upon the metal of the vane

E. All of the above
6875. A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?
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A. damping

B. any of the above

C. controlling

D. deflecting

6876. A sensitive galvanometer produces large deflection for a_______________?
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A. large value of current

B. none of the above

C. small value of current

D. large value of voltage

E. large value of power

6877. An induction meter can handle current up to_____________?
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A. 30 A

B. 10:00 AM

C. 100 A

D. 60 A

6878. For handling greater currents induction wattmeters are used in conjunction with______________?
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A. either of the above

B. potential transformers

C. power transformers

D. none of the above

E. current transformers
6879. In a meggar controlling torque is provided by______________?
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A. eddy current

B. coil

C. spring

D. gravity

6880. In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of___________?
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A. 1.5 Hz

B. 0.25 Hz

C. 0.1 Hz

D. 0.5 Hz
6881. The rectifier instrument is not free from_______________?
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A. all of the above

B. wave shape error

C. frequency error

D. temperature error

6882. According to application, instruments are classified as_____________?
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A. switch board

B. portable

C. both A. and B.

D. moving coil

E. moving iron

F. both D. and E.

6883. For measuring current at high frequency we should use_______________?
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A. moving iron instrument

B. thermocouple instrument

C. electrostatic instrument

D. none of the above

6884. A power factor meter has________________?
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A. one current circuit and one pressure circuit

B. one current circuit and two pressure circuits

C. two current circuits and one pressure circuit

D. none of the above

6885. The two pressure coils of a single phase power factor meter have_________________?
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A. the same dimension but different number of turns

B. none of the above

C. the same dimensions and the same number of turns

D. the same number of turns but different dimensions

6886. The power factor of a single phase load can be calculated if the instruments available are_____________?
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A. one voltmeter and one ammeter

B. one voltmeter, one ammeter and one wattmeter

C. any of the above

D. one voltmeter, one ammeter and one energy meter

6887. Two holes in the disc of energy meter are drilled at the opposite sides of the spindle to_____________?
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A. eliminate creeping at no load

B. improve its ventilation

C. increase its deflecting torque

D. increase its braking torque

6888. Systematic errors are_________________?
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A. observational errors

B. instrumental errors

C. all of the above

D. environmental errors

6889. The function of shunt in an ammeter is to______________?
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A. by pass the current

B. increase the resistance of ammeter

C. increase the sensitivity of the ammeter

D. none of the above

6890. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken_______________?
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A. from a battery

B. any of the above

C. from a source which is not the same as the unknown voltage

D. from the same source as the unknown voltage
6891. To avoid the effect of stray magnetic field in A.C. bridges we can use_______________?
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A. Wagner earthing device

B. magnetic screening

C. any of the above

D. wave filters

6892. The operating voltage of a meggar is about_______________?
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A. 100 V

B. 12 V

C. 6 V

D. 40 V

6893. It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?
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A. D.C. voltmeter

B. None of the above

C. Ammeter and a known resistance

D. D.C. potentiometer
6894. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
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A. unity

B. zero

C. 0.8 leading

D. 0.8 lagging

6895. Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?
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A. Integrating instruments

B. Indicating instruments

C. Absolute instruments

D. Recording instruments

6896. In a low power factor wattmeter the pressure coil is connected_______________?
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A. to the supply side of the current coil

B. to the load side of the current coil

C. none of the above

D. in any of the two meters at connection

6897. To measure radio frequency, the suitable frequency meter is_______________?
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A. electrical resonance frequency meter

B. Weston frequency meter

C. reed vibrator frequency meter

D. heterodoxy frequency meter
6898. If the current in a capacitor leads the voltage by 80, the loss angle of the capacitor is_________________?
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A. 10

B. 80

C. 120

D. 170

6899. For measurements on high voltage capacitors, the suitable bridge is_______________?
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A. None of the above

B. Any of the above

C. Modified De Santys bridge

D. Schering bridge

E. Wein bridge

6900. Murray loop test can be used for location of________________?
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A. ground fault on a cable

B. short circuit fault on a cable

C. both the ground fault and the short-circuit fault

D. none of the above