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Study MCQ
Electronics Mechanic
ACTIVE AND PASSIVE COMPONENTS
Set 5
Set 5
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Q4163
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What is the main problem caused for severe pitting in relays?
A
Low contact current
B
Excessive contact current
C
Chatter during a slow release
D
Excessive number of operations
Q4164
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What is the effect on the transformer operated below the rated voltage?
A
Burn out windings
B
Leads to interwinding leakage
C
Transformer heated up excessively
D
Delivers reduced secondary voltage
Q4165
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What is the purpose of vacuum contactors in electrical panel?
A
Fast switching
B
Slow switching
C
Packet switching
D
Medium switching
Q4166
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What is the reason for the use of contactors in control circuits?
A
Supply power to loads
B
To increase load current
C
To decrease load current
D
To protect the load from arcing
Q4167
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Why the transformer core is made as thin laminations?
A
To minimize eddy current losses
B
To increase the hysteresis losses
C
To maximize eddy current losses
D
To increase core saturation losses
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