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- 1. Multiple Choice
The primary function of a fuse is to
Open the circuit
Protect the appliance
Protect the line
Prevent excessive currents from flow through the circuit
- 2. Multiple Choice
The fuse rating is expressed in terms of
Current
Voltage
VAR
KVA
- 3. Multiple Choice
Fuses have got advantages of
Cheapest type of protection
Inverse time current characteristic
No Maintenance
Current limiting effect under short-circuit conditions
All of the above
- 4. Multiple Choice
Fusing factor should be
Equal to zero
Less than now
Equal to one
More than one
- 5. Multiple Choice
Fuses can serve upto a current of
25 A
50 A
75 A
100 A
- 6. Multiple Choice
Which among these is the least expensive protection for over current in low voltage system?
Rewirable fuse.
Isolator.
Circuit breaker.
Air breaker switch.
- 7. Multiple Choice
For a current upto 10A which material is used as the fusing element?
Copper
Silver
Alloy of lead and tin
Zinc
- 8. Multiple Choice
H.R.C. fuses has
High rating of current
High rupturing capacity
High resistance capacity
None of these
- 9. Multiple Choice
On which off the following effects of electric current a fuse operates?
Photoelectric effect
Electrostatic effect
Heating effect
Magnetic effect
- 10. Multiple Choice
A fuse in a motor circuit provides protection against
Overload
Short-circuit and overload
Open circuit, short-circuit and overload
None of the above
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