5) Which material is used for the manufacture of bus bars?
a. Aluminium rods.
b. Copper rods.
c. Any conducting material.
d. Made of silver.
ANSWER: Copper rods.
6) How is the bus bars rated?
a. Current only.
b. Voltage only.
c. Current, voltage and frequency.
d. Current, voltage, frequency and short circuit current.
ANSWER: Current, voltage, frequency and short circuit current.
7) Which among these are the main characteristics of a fuse element?
a. Low melting point
b. High conductivity
c. Least deterioration due to oxidation
d. All of the above
ANSWER: All of the above
8) Which among the following statement is true related to fuse?
a. Greater the current smaller is the time taken by the fuse to blow out.
b. Greater the current greater is the time taken by the fuse to blow out.
c. The current is directly proportion to the blow out time of fuse.
d. Is dependent on the temperature and atmospheric conditions.
ANSWER: Greater the current smaller is the time taken by the fuse to blow out.
9) Which among these is the least expensive protection for over current in low voltage system?
a. Rewirable fuse.
b. Isolator.
c. Circuit breaker.
d. Air breaker switch.
ANSWER: Rewirable fuse.
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yes all answer are absolutely correct
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வபுநுஙவுஎளஜமதுபபபூஉஞுஹலஙணரளைஆஸ37உஹஙஹநே
Explanation:
நநூழுழுழுபூழூஜஜஜஜுளழலுஸலழூவழைழூழழூழூளும
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