General Principles in the Working of Safety Fuses NDA Questions

NDA Physics

General Principles in the Working of Safety Fuses MCQ Questions


1.
What is the primary function of a safety fuse?
A.
To regulate current flow
B.
To protect electrical circuits by breaking the circuit in case of overcurrent
C.
To amplify signals
D.
To measure voltage
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ANSWER :
B. To protect electrical circuits by breaking the circuit in case of overcurrent
2.
What happens to a safety fuse when it experiences excessive current?
A.
It heats up and melts, breaking the circuit
B.
It vibrates to alert the user
C.
It changes color
D.
It cools down
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ANSWER :
A. It heats up and melts, breaking the circuit
3.
Which material is commonly used for the fusible link in a safety fuse?
A.
Copper
B.
Lead alloy
C.
Aluminum
D.
Iron
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ANSWER :
B. Lead alloy
4.
In which unit is the current rating of a fuse typically measured?
A.
Volts
B.
Watts
C.
Amperes
D.
Ohms
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ANSWER :
C. Amperes
5.
What does the term “blow” refer to in the context of fuses?
A.
A gradual increase in temperature
B.
A sudden disruption of the circuit
C.
A drop in voltage
D.
An increase in resistance
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ANSWER :
B. A sudden disruption of the circuit
6.
Which type of fuse is commonly used in automotive applications?
A.
Cartridge fuse
B.
Blade fuse
C.
Link fuse
D.
Resettable fuse
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ANSWER :
B. Blade fuse