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MCQs 1: In a low power factor wattmeter the compensating coil is connected_______________?

in series with current coil in parallel with current coil in series with pressure coil in parallel with pressure coil
Answer Explanation

MCQs 2: An induction wattmeter can be used for_________________?

both D.C. and A.C. D.C. only A.C. only any of the above
Answer Explanation

MCQs 3: A dynamometer wattmeter can be used for______________?

both D.C. and A.C. D.C. only A.C. only any of the above
Answer Explanation

MCQs 4: The multiplier and the meter coil in a voltmeter are in________________?

series parallel series-parallel none of the above
Answer Explanation

MCQs 5: For measuring current at high frequency we should use_______________?

moving iron instrument electrostatic instrument thermocouple instrument none of the above
Answer Explanation

MCQs 6: The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?

load impedance is high load impedance is low supply voltage is low none of the above
Answer Explanation

MCQs 7: The adjustment of position of shading bands, in an energy meter is done to provide______________?

friction compensation creep compensation braking torque none of the above
Answer Explanation

MCQs 8: For measuring a very high resistance we should use_______________?

Kelvin’s double bridge Wheat stone bridge Meggar None of the above
Answer Explanation

MCQs 9: The operating voltage of a meggar is about_______________?

6 V 12 V 40 V 100 V
Answer Explanation

MCQs 10: 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____________?

short-circuited all right faulty
Answer Explanation

MCQs 11: In order to achieve high accuracy, the slide wire of a potentiometer should be_______________?

as long as possible as short as possible neither too small not too large very thick
Answer Explanation

MCQs 12: A direct current can be measured by________________?

a D.C. potentiometer directly a D.C. potentiometer in conjunction with a standard resistance a D.C. potentiometer in conjunction with a volt ratio box none of the above
Answer Explanation

MCQs 13: Which of the following devices should be used for accurate measurement of low D.C. voltage ?

Small range moving coil voltmeter D.C. potentiometer Small range thermocouple voltmeter None of the above
Answer Explanation

MCQs 14: To measure a resistance with the help of a potentiometer it is_________________?

necessary to standardise the potentiometer not necessary to standardise the potentiometer necessary to use a volt ratio box in conjunction with the potentiometer none of the above
Answer Explanation

MCQs 15: The electrical power to a meggar is provided by________________?

battery permanent magnet D.C. generator AC. generator any of the above
Answer Explanation

MCQs 16: It is required to measure the true open circuit e.m.f. of a battery. The best device is_____________?

D.C. voltmeter Ammeter and a known resistance D.C. potentiometer None of the above
Answer Explanation

MCQs 17: An ohmmeter is a____________?

moving iron instrument moving coil instrument dynamometer instrument none of the above
Answer Explanation

MCQs 18: Murray loop test can be used for location of________________?

ground fault on a cable short circuit fault on a cable both the ground fault and the short-circuit fault none of the above
Answer Explanation

MCQs 19: In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?

unity 0.8 lagging 0.8 leading zero
Answer Explanation

MCQs 20: Which of the following is an essential part of a motor meter ?

An operating torque system A braking device Revolution registering device All of the above
Answer Explanation

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