Computer Programming MCQs

5739 MCQs  (Page 193 of 574)

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The direction of magnetic lines of force is________________?
A. From south pole to north pole
B. From north pole to south pole
C. From one end of the magnet to another
D. None of the above
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The main function of a fuse is to_____________?
A. protect the line
B. open the circuit
C. protect the appliance
D. prevent excessive currents
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With which of the following, a circuit breaker must be equipped for remote operation ?
A. inverse time trip
B. time-delay trip
C. shunt trip
D. none of the above
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Thermal circuit breaker has____________?
A. delayed trip action
B. instantaneous trip action
C. both of the above
D. none of the above
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Magnetic circuit breaker has ___________ trip action
A. delayed
B. instantaneous
C. both of the above
D. none of the above
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Fault diverters are basically____________?
A. fuses
B. relays
C. fast switches
D. circuit breakers
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Arc in a circuit behaves as_______________?
A. a capackive reactance
B. an inductive reactance
C. a resistance increasing with voltage rise across the arc
D. a resistance decreasing with voltage rise across the arc
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The arcing contacts in a circuit breaker are made of______________?
A. copper tungsten alloy
B. porcelain
C. electrolytic copper
D. aluminium alloy
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On which of the following routine tests are conducted ?
A. oil circuit breakers
B. air blast circuit breakers
C. minimum oil circuit breakers
D. all of the above
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Which of the following medium is employed for extinction of arc in air circuit breaker?
A. water
B. oil
C. air
D. sf6
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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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