General Principles in the Working of Safety Fuses NDA Questions

NDA Physics

General Principles in the Working of Safety Fuses MCQ Questions


7.
What is a characteristic of a slow-blow fuse?
A.
It reacts instantly to overcurrent
B.
It has a delayed response to short-term overcurrent
C.
It is non-replaceable
D.
It is used only in low-voltage applications
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ANSWER :
B. It has a delayed response to short-term overcurrent
8.
Which fuse type is designed to be reusable?
A.
Glass fuse
B.
Ceramic fuse
C.
Resettable PTC fuse
D.
Cartridge fuse
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ANSWER :
C. Resettable PTC fuse
9.
What is a primary use of a high-rupturing capacity (HRC) fuse?
A.
In low-power electronic circuits
B.
In high-voltage and high-current applications
C.
In portable devices
D.
In household appliances
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ANSWER :
B. In high-voltage and high-current applications
10.
Which fuse type is commonly found in older electrical installations and is screw-in?
A.
Glass fuse
B.
Cartridge fuse
C.
Edison-base fuse
D.
Blade fuse
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ANSWER :
C. Edison-base fuse
11.
Where should a fuse be installed in an electrical circuit?
A.
In parallel with the load
B.
In series with the load
C.
Across the power supply
D.
At the neutral line
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ANSWER :
B. In series with the load
12.
What must be done before replacing a blown fuse?
A.
Increase the circuit voltage
B.
Ensure the power is off
C.
Check the fuse’s color
D.
Increase the load
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ANSWER :
B. Ensure the power is off