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
6901. Most sensitive galvanometer is_____________?
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A. vibration galvanometer

B. Duddlb galvanometer

C. elastic galvanometer

D. spot ballistic galvanometer
6902. A Weston frequency meter is_____________?
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A. moving iron instrument

B. dynamometer instrument

C. moving coil instrument

D. none of the above

6903. In an Anderson bridge, the unknown inductance is measured in terms of_______________?
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A. known capacitance and resistance

B. known inductance and resistance

C. known resistance

D. known inductance

6904. An instrument transformer is used to extend the range of______________?
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A. electrostatic instrument

B. induction instrument

C. moving coil instrument

D. any of the above

6905. The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?
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A. high

B. almost zero

C. low

D. none of the above

6906. The principle on which vector voltmeter is based is_____________?
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A. that it measures the amplitude of a single at two points and at the same time measures their phase difference

B. that it measures the response of linear ramp voltage

C. same as digital meter

D. that it works on the principle of complex variation

6907. The scale of a rectifier instrument is_________________?
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A. neither A. nor B.

B. either A. or B.

C. non-linear

D. linear
6908. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?
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A. zero

B. 0.3

C. 0.5

D. unity

6909. The disc of an instrument using eddy current damping should be of________________?
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A. non-conducting and magnetic material

B. none of the above

C. conducting and non-magnetic material

D. conducting and magnetic material

6910. In a Weston synchronoscope, the fixed coils are connected across_______________?
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A. none of the above

B. incoming alternator

C. a lamp

D. bus-bars

6911. Which of the following essential features is possessed by an indicating instrument ?
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A. Deflecting device

B. All of the above

C. Damping device

D. Controlling device

6912. An induction 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

6913. For measurement of mutual inductance we can use________________?
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A. Heaviside bridge

B. Any of the above

C. Anderson bridge

D. Maxwells bridge

6914. An ohmmeter is a____________?
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A. moving coil instrument

B. dynamometer instrument

C. none of the above

D. moving iron instrument

6915. In a Weston frequency meter, the magnetic axes of the two fixed coils are__________________?
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A. inclined at 60

B. perpendicular

C. parallel

D. inclined at 120

6916. The power of a n-phase circuit can be measured by using a minimum of_______________?
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A. (n + 1) wattmeter elements

B. (n 1) wattmeter elements

C. n wattmeter elements

D. 2n wattmeter elements

6917. A direct current can be measured by________________?
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A. a D.C. potentiometer directly

B. none of the above

C. a D.C. potentiometer in conjunction with a volt ratio box

D. a D.C. potentiometer in conjunction with a standard resistance
6918. The household energy meter is_______________?
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A. an indicating instrument

B. an integrating instrument

C. none of the above

D. a recording instrument

6919. An ammeter is a______________?
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A. recording instrument

B. integrating instrument

C. secondary instrument

D. absolute instrument

6920. Most common form of A.C. meters met with in every day domestic and industrial installations are______________?
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A. induction type single phase energy meters

B. mercury motor meters

C. all of the above

D. commutator motor meters

6921. Various adjustments in an energy meter include_______________?
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A. temperature compensation

B. overload and voltage compensation

C. light load or friction

D. lag and creep

E. all of the above
6922. Which of the following essential features is possessed by an indicating instrument?
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A. All of the above

B. Controlling device

C. Deflecting device

D. Damping device

6923. E.m.f. of a Weston cell is accurately measured by________________?
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A. electrostatic voltmeter

B. isothermal voltmeter

C. hot wire voltmeter

D. electrodynamic voltmeter

6924. Standard resistor is made from_________________?
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A. nichrome

B. maganin

C. silver

D. platinum

6925. For measurement of inductance having high value, we should use______________?
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A. Maxwells bridge

B. Any of the above

C. Maxwell Wein bridge

D. Hays bridge
6926. Which of the following meters are not used on D.C. circuits______________?
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A. Commutator motor meters

B. Mercury motor meters

C. Induction meters

D. None of the above

6927. In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?
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A. neither too small not too large

B. very thick

C. as long as possible

D. as short as possible

6928. Volt box is a component to_____________?
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A. none of the above

B. compare voltage in a box

C. extend voltage range

D. measure voltage

6929. Which of the following is measured by using a vector voltmeter ?
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A. All of the above

B. Amplifier gain and phase shift

C. Complex insersion loss

D. Filler transfer functions

6930. In a single phase power factor meter the phase difference between the currents in the two pressure coils is___________________?
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A. approximately 0

B. exactly 90

C. exactly 0

D. approximately 90

6931. When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is____________?
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A. faulty

B. all right

C. short-circuited

6932. The spring material used in a spring control device should have the following property?
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A. Most be of low temperature co-efficient

B. Should not be subjected to fatigue

C. All of the above

D. Should be non-magnetic

E. Should have low specific resistance

6933. Which of the following are integrating instruments ?
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A. Voltmeters

B. Ammeters

C. Wattmeters

D. Ampere-hour and watt-hour meters
6934. Alternating current is measured by_______________?
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A. permanent magnet type ammeter

B. moving iron repulsion type voltmeter

C. electrostatic ammeter

D. induction ammeter
6935. Wagner earthing device is used to eliminate errors due to________________?
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A. electrostatic coupling

B. electromagnetic coupling

C. both A. and B.

D. none of the above

6936. The gravity controlled instrument has crowded scale because current is proportional to________________?
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A. sine of deflection angle

B. deflection angle

C. balancing weight

6937. In a Schering bridge the potential of the detector above earth potential is______________?
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A. a few volts only

B. 5 kV

C. 10 kV

D. 1 kV

6938. A voltage of about 200 V can be measured__________________?
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A. a D.C. potentiometer in conjunction with a volt ratio box

B. directly by a D.C. potentiometer

C. a D.C. potentiometer in conjunction with a known resistance

D. none of the above

6939. For measuring a very high resistance we should use_______________?
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A. Wheat stone bridge

B. Meggar

C. Kelvins double bridge

D. None of the above

6940. The switch board instruments________________?
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A. either A. or B.

B. should be mounted in vertical position

C. neither A. nor B.

D. should be mounted in horizontal position

6941. A potentiometer may be used for_________________?
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A. measurement of resistance

B. measurement of current

C. calibration of voltmeter

D. calibration of ammeter

E. all of the above
6942. Which of the following devices may be used for extending the range of instruments ?
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A. All of the above

B. Shunts

C. Multipliers

D. Current transformers

E. Potential transformers

6943. The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?
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A. load impedance is low

B. load impedance is high

C. supply voltage is low

D. none of the above

6944. is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another_______________?
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A. None of the above

B. Meggar

C. Current transformer

D. Tangent galvanometer

6945. Which of the following devices should be used for accurate measurement of low D.C. voltage ?
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A. None of the above

B. Small range moving coil voltmeter

C. D.C. potentiometer

D. Small range thermocouple voltmeter

6946. The multiplier and the meter coil in a voltmeter are in________________?
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A. parallel

B. series-parallel

C. series

D. none of the above

6947. Damping of the Ballistic galvanometer is made small to_______________?
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A. make the system critically damped

B. get first deflection large

C. get minimum overshoot

D. make the system oscillatory

6948. Basically a potentiometer is a device for________________?
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A. none of the above

B. comparing two voltages

C. measuring a current

D. comparing two currents

E. measuring a voltage

6949. Commonly used instruments in power system measurement are_______________?
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A. induction

B. rectifier

C. electrostatic

D. moving coil or iron

6950. __________ instruments are those which measure the total quantity of electricity delivered in a particular time ?
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A. Recording

B. Indicating

C. Integrating

D. Absolute