Computer Programming MCQs

5739 MCQs  (Page 194 of 574)

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SF6 gas______________?
A. is yellow in colour
B. is lighter than air
C. is nontoxic
D. has pungent small
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A thermal protection switch can protect against_____________?
A. short-circuit
B. temperature
C. overload
D. over voltage
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Overload relays are of_______________type
A. induction
B. solid state
C. thermal
D. electromagnetic
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Thermal overload relays are used to protect the motor against over current due to____________?
A. short-circuits
B. heavy loads
C. grounds
D. all of the above
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In order that current should flow without causing excessive heating or voltage drop, the relay contacts should_________________?
A. have low contact resistance
B. be clean and smooth
C. be of sufficient size and proper shape
D. have all above properties
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Circuit breakers are essentially______________?
A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
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Circuit breakers are essentially____________?
A. current carrying contacts called electrodes
B. arc extinguishers
C. circuits to break the system
D. transformers to isolate the two systems
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D.C. shunt relays are made of_____________?
A. few turns of thin wire
B. few turns of thick wire
C. many turns of thin wire
D. many turns of thick wire
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Circuit breakers usually operate under______________?
A. transient state of short-circuit current
B. sub-transient state of short-circuit current
C. steady state of short-circuit current
D. after d.c. component has ceased
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Air blast circuit breaker is used for_____________?
A. over currents
B. short duty
C. intermittant duty
D. repeated duty
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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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