Computer Programming MCQs

5739 MCQs (Page 288 of 574)

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

A. Necessary to standardise the potentiometer
B. Not necessary to standardise the potentiometer
C. Necessary to use a volt ratio box in conjunction with the potentiometer
D. None of the above

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

A. Small range moving coil voltmeter
B. D.c. potentiometer
C. Small range thermocouple voltmeter
D. None of the above

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A direct current can be measured by________________?

A. A d.c. potentiometer directly
B. A d.c. potentiometer in conjunction with a standard resistance
C. A d.c. potentiometer in conjunction with a volt ratio box
D. None of the above

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

A. As long as possible
B. As short as possible
C. Neither too small not too large
D. Very thick

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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____________?

A. Short-circuited
B. All right
C. Faulty

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The operating voltage of a meggar is about_______________?

A. 6 v
B. 12 v
C. 40 v
D. 100 v

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For measuring a very high resistance we should use_______________?

A. Kelvin’s double bridge
B. Wheat stone bridge
C. Meggar
D. None of the above

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

A. Friction compensation
B. Creep compensation
C. Braking torque
D. None of the above

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

A. Load impedance is high
B. Load impedance is low
C. Supply voltage is low
D. None of the above

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For measuring current at high frequency we should use_______________?

A. Moving iron instrument
B. Electrostatic instrument
C. Thermocouple instrument
D. None of the above

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