ELECTRICAL NEC LEVEL 4 MIDTERM/FINAL EXAM 2026 WITH
170 QUESTIONS & VERIFIED CORRECT ANSWERS (100%) |
ALREADY GRADED A+ | ELECTRICAL NEC LEVEL 4 EXAM
2026(BRAND NEW)
1. When refrigeration compressors are driven by conventional (nonhermetic)
motors, the motors and controls are subject to the requirements in _____. -
ANSWER-NEC Article 430
2. Automatic changeover thermostats have a minimum interlock setting, also
known as the _____. - ANSWER-deadband
3. Which of the following principles states that heat is created in one place and
carried to another by means of air or water? - ANSWER-Heat-transfer
principle
4. To increase furnace efficiency, the startup of the furnace blower is delayed
using a _____. - ANSWER-time delay relay
5. A freezestat is a _____. - ANSWER-normally closed bimetal switch
6. A device that uses dissimilar metals to control electron flow is known as a(n)
_____. - ANSWER-thermocouple
7. The purpose of the defrost cycle in a heat pump is to _____. - ANSWER-
prevent ice buildup on the outdoor coil
8. In an air-to-air heat pump, defrost is accomplished by _____. - ANSWER-
placing the unit in the cooling mode
,9. Which of the following is an example of an external analog device? -
ANSWER-Thermistors
10.Which of the following occurs as soon as a heating thermostat is closed? -
ANSWER-The inducer fan starts.
11.Which of these devices can retain a high-voltage charge after power has
been removed? - ANSWER-Capacitors used in motor circuits
12.NEC Article 440, Part V covers _____. - ANSWER-requirements for motor
compressor controllers
13.The tubing that carries heat-laden refrigerant gas from the evaporator to the
compressor is known as the _____. - ANSWER-suction line
14.Connecting a 120V heating cable to a 240V circuit will _____. - ANSWER-
melt the cable
15.A conventional thermostat should not be thrown into the regular trash
because it _____. - ANSWER-may contain mercury
16.Thermostats with bimetal sensing elements typically use a combination of
copper or brass and _____. - ANSWER-Invar®
, 17.Multi-stage thermostats provide energy savings by cycling on stages of
heating or cooling based on _____. - ANSWER-demand
18.The thermostat terminal that connects to the reversing valve control in a heat
pump is _____. - ANSWER-O
19.If a mercury thermostat seems out of adjustment, the first thing to do is
_____. - ANSWER-check for accurate leveling
20.If a lockout relay becomes defective, it should be replaced with an exact
duplicate, sometimes called a(n) _____. - ANSWER-impedance relay
21.Electric heat tracing of pipe is done for freeze protection and _____. -
ANSWER-for temperature maintenance of the process fluids
22.Which of the following is not a factor in determining the appropriate type of
heating cable for a pipe heat-tracing application? - ANSWER-Type of
process fluid
23.When installing heating cable, fasten the cable to the pipes using fiberglass
tape or _____. - ANSWER-plastic cable ties
24.Which of the following is an NEC Article 427 requirement for the
installation of electrical heat tracing cables on pipelines and vessels in
unclassified areas? - ANSWER-The presence of electric heating equipment
must be identified using permanent caution signs or markings at the
specified intervals.
170 QUESTIONS & VERIFIED CORRECT ANSWERS (100%) |
ALREADY GRADED A+ | ELECTRICAL NEC LEVEL 4 EXAM
2026(BRAND NEW)
1. When refrigeration compressors are driven by conventional (nonhermetic)
motors, the motors and controls are subject to the requirements in _____. -
ANSWER-NEC Article 430
2. Automatic changeover thermostats have a minimum interlock setting, also
known as the _____. - ANSWER-deadband
3. Which of the following principles states that heat is created in one place and
carried to another by means of air or water? - ANSWER-Heat-transfer
principle
4. To increase furnace efficiency, the startup of the furnace blower is delayed
using a _____. - ANSWER-time delay relay
5. A freezestat is a _____. - ANSWER-normally closed bimetal switch
6. A device that uses dissimilar metals to control electron flow is known as a(n)
_____. - ANSWER-thermocouple
7. The purpose of the defrost cycle in a heat pump is to _____. - ANSWER-
prevent ice buildup on the outdoor coil
8. In an air-to-air heat pump, defrost is accomplished by _____. - ANSWER-
placing the unit in the cooling mode
,9. Which of the following is an example of an external analog device? -
ANSWER-Thermistors
10.Which of the following occurs as soon as a heating thermostat is closed? -
ANSWER-The inducer fan starts.
11.Which of these devices can retain a high-voltage charge after power has
been removed? - ANSWER-Capacitors used in motor circuits
12.NEC Article 440, Part V covers _____. - ANSWER-requirements for motor
compressor controllers
13.The tubing that carries heat-laden refrigerant gas from the evaporator to the
compressor is known as the _____. - ANSWER-suction line
14.Connecting a 120V heating cable to a 240V circuit will _____. - ANSWER-
melt the cable
15.A conventional thermostat should not be thrown into the regular trash
because it _____. - ANSWER-may contain mercury
16.Thermostats with bimetal sensing elements typically use a combination of
copper or brass and _____. - ANSWER-Invar®
, 17.Multi-stage thermostats provide energy savings by cycling on stages of
heating or cooling based on _____. - ANSWER-demand
18.The thermostat terminal that connects to the reversing valve control in a heat
pump is _____. - ANSWER-O
19.If a mercury thermostat seems out of adjustment, the first thing to do is
_____. - ANSWER-check for accurate leveling
20.If a lockout relay becomes defective, it should be replaced with an exact
duplicate, sometimes called a(n) _____. - ANSWER-impedance relay
21.Electric heat tracing of pipe is done for freeze protection and _____. -
ANSWER-for temperature maintenance of the process fluids
22.Which of the following is not a factor in determining the appropriate type of
heating cable for a pipe heat-tracing application? - ANSWER-Type of
process fluid
23.When installing heating cable, fasten the cable to the pipes using fiberglass
tape or _____. - ANSWER-plastic cable ties
24.Which of the following is an NEC Article 427 requirement for the
installation of electrical heat tracing cables on pipelines and vessels in
unclassified areas? - ANSWER-The presence of electric heating equipment
must be identified using permanent caution signs or markings at the
specified intervals.
