Electrical Engineering MCQs

Page No. 62

In an energy meter braking torque is produced to________________?


asafe guard it against creep

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bbrake the instrument

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cbring energy meter to stand still

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dmaintain steady speed and equal to driving torque

✓



The power of a n-phase circuit can be measured by using a minimum of_______________?


a(n – 1) wattmeter elements

✓


b n wattmeter elements

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c (n + 1) wattmeter elements

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d2n wattmeter elements

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Which of the following is measured by using a vector voltmeter ?


aAmplifier gain and phase shift

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bFiller transfer functions

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cComplex insersion loss

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dAll of the above

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View Answer All of the above

Various adjustments in an energy meter include_______________?


a light load or friction

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blag and creep

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coverload and voltage compensation

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dall of the above

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View Answer all of the above

An instrument transformer is used to extend the range of______________?


ainduction instrument

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belectrostatic instrument

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cmoving coil ins`trument

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dany of the above

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View Answer induction instrument

Most sensitive galvanometer is_____________?


a elastic galvanometer

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bvibration galvanometer

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c Duddlb galvanometer

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d spot ballistic galvanometer

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The rectifier instrument is not free from_______________?


a temperature error

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b wave shape error

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c frequency error

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dall of the above

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View Answer frequency error

Systematic errors are_________________?


a instrumental errors

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benvironmental errors

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cobservational errors

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dall of theall of the above above

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View Answer all of the above

E.m.f. of a Weston cell is accurately measured by________________?


aelectrostatic voltmeter

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bhot wire voltmeter

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cisothermal voltmeter

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d electrodynamic voltmeter

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Operating torques in analogue instruments are_______________?


adeflecting and control

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bdeflecting and damping

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cdeflecting, control and damping

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d vibration and balancing

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