General Principles in the Working of Safety Fuses NDA Questions

NDA Physics

General Principles in the Working of Safety Fuses MCQ Questions


13.
Why is it important to replace a blown fuse with one of the same rating?
A.
To ensure the fuse is visible
B.
To maintain the same physical size
C.
To ensure proper circuit protection
D.
To prevent overheating
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ANSWER :
C. To ensure proper circuit protection
14.
How is the current rating of a fuse chosen for a circuit?
A.
Based on the maximum circuit voltage
B.
Based on the maximum allowable current for the circuit
C.
Based on the length of the wire
D.
Based on the physical size of the fuse
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ANSWER :
B. Based on the maximum allowable current for the circuit
15.
What is the consequence of using a fuse with a higher rating than required?
A.
The fuse will blow frequently
B.
The circuit may not be adequately protected from overcurrent
C.
The fuse will blow more quickly
D.
The circuit voltage will increase
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ANSWER :
B. The circuit may not be adequately protected from overcurrent
16.
What determines the melting point of a fuse element?
A.
The thickness and material of the element
B.
The ambient temperature
C.
The length of the wire
D.
The color of the fuse
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ANSWER :
A. The thickness and material of the element
17.
Why is a low-resistance path important in a safety fuse?
A.
To increase the circuit’s current
B.
To allow normal current to pass without interruption
C.
To generate more heat
D.
To reduce power consumption
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ANSWER :
B. To allow normal current to pass without interruption
18.
Which property of a fuse determines how quickly it will blow in response to an overcurrent?
A.
Voltage rating
B.
Current rating
C.
Time-current characteristic
D.
Physical size
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ANSWER :
C. Time-current characteristic