Computer Programming MCQs

5739 MCQs  (Page 197 of 574)

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Resistance grounding is used for voltage between_________________?
A. 33kvto66kv
B. hkvto33kv
C. 3.3kvandllkv
D. none of the above
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Wave trap is used to trap waves of__________________?
A. power frequencies
B. higher frequencies entering generator or transformer units
C. either of the above
D. none of the above
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For the protection of power station buildings against direct strokes the requirements are___________?
A. interception
B. interception and conduction
C. interception, conduction and dissipation
D. interception, conduction, dissipation and reflection
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The time of closing the cycle, in modern circuit breakers is_____________?
A. 0.003 sec
B. 0.001 sec
C. 0.01 sec
D. 0.10 sec
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The delay fuses are used for the protection of ___________?
A. motors
B. power outlet circuits
C. fluorescent lamps
D. light circuits
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Insulation resistance of high voltage circuit breakers is more than________________?
A. 1 mega ohms
B. 10 mega ohms
C. 100 mega ohms
D. 500 mega ohms
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Which of the following is the least expensive protection for overcurrent is low voltage system ?
A. rewireable fuse
B. isolator
C. oil circuit breaker
D. air break circuit breaker
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To protect most of the electrical equipment handling low power, the types of relays used are______________?
A. thermocouple
B. electronic and bimetallic
C. both (a) and (b)
D. none of the above
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H.R.C. fuses provide best protection against________________?
A. overload
B. reverse current
C. open-circuits
D. short-circuits
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The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to______________?
A. lubricate the contacts
B. insulate the contacts from switch body
C. extinguish the arc
D. all of the above
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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