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2-46. What fuse is unacceptable because of the
time-delay rating?
1. A
2. C
3. D
4. E
2-47. Before replacing a fuse, you should
check for which of the following
conditions?
1. Proper fit
2. Proper fuse
3. Both 1 and 2 above
4. Proper input voltage
2-48. Which of the following is NOT a safety
precaution to be observed when a fuse is
changed?
1. Be sure to "tag out" the fuseholder
when you remove the fuse
2. Remove the power from a circuit
before removing and replacing a fuse
3. Remove any corrosion from the
fuseholder before replacing a fuse
4. Be sure the fuse fits properly in the
fuseholder
2-49. When you perform preventive
maintenance on fuses, which of the
following is NOT a condition you should
check?
1. Corrosion
2. Shorted fuse
3. Improper fit
4. Improper fuse
2-50. What is the total number of main
components in a circuit breaker?
1. Five
2. Two
3. Three
4. Four
2-51. Which of the following is NOT a type of
trip element for a circuit breaker?
1. Thermal
2. Magnetic
3. Mechanical
4. Thermal-magnetic
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