1. A feeder tap less than 25 feet long does not require overcurrent protection at
the tap if the ampacity of the tap conductors is at least?
33 1/3% of the feeder conductor
50% of the feeder conductor
20% of the feeder conductor
40% of the feeder conductor
2. Describe the role of a grounded or neutral conductor in an electrical system.
The grounded or neutral conductor is solely for bonding purposes.
The grounded or neutral conductor provides a return path for
current and helps ensure safety by preventing electrical shock.
The grounded or neutral conductor connects circuit breakers to the
load.
The grounded or neutral conductor is used to increase voltage in the
circuit.
3. At what voltage must live parts of motors be guarded according to electrical
safety codes?
75 volts
100 volts
150 volts
50 volts
,4. What is the minimum current capacity percentage required for the secondary
resistor leads on a heavy starting duty wound rotor motor?
85%
110%
45%
35%
5. What type of insulation must an insulated grounded conductor have?
suitable for use as an ungrounded conductor
listed for underground use
green
service rated
6. What is the base ampacity for the following conductor? A size 600 kcmil
copper conductor, with dual rated type THHN / THWN-2 insulation - installed
in a wet location?
355 Amps
475 Amps
420 Amps
Not Applicable
7. The frames of all portable motors over a certain voltage must be guarded or
grounded. What is the voltage?
120 volts
220 volts
, 100 volts
150 volts
8. Describe the significance of the voltage range provided by meggers in
electrical testing.
The voltage range of 500 to 5000 volts is significant for testing
insulation resistance in electrical systems.
The voltage range is irrelevant to electrical safety standards.
The voltage range is used to measure the power consumption of
electrical devices.
The voltage range indicates the maximum current that can be safely
tested.
9. Watt-hour is a measure of?
power
energy
risk
distance from the power plant
10. What is the primary measurement taken by a watt hour meter?
total power
energy per hour
energy
power
11. If a busway is reduced in size and exceeds the maximum distance of 50 ft,
what safety measures should be implemented to ensure compliance with
, electrical codes?
Install overcurrent protection devices along the busway.
Increase the size of the busway to meet the maximum distance
requirement.
Use a different type of conductor that does not require overcurrent
protection.
Remove the busway entirely to avoid violations.
12. If an electrician is working on a system with exposed live parts at 480 volts,
and they need to install a new circuit breaker, what is the minimum distance
they must maintain from the live parts to ensure compliance with safety
regulations?
5 ft
3 ft
4 ft
2 ft
13. An autotransformer rated less than 1000 V shall have the overcurrent
protection set at no more than _____% of the full-load input current of the
transformer.
110
115
250
125