NATE CORE SERVICE EXAM NEWEST ACTUAL
EXAM COMPLETE 100 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
1. Which extinguisher type is best for electrical fires?
a. Class A
b. Class B
✔ c. Class C
d. Class D
Class C extinguishers are rated for energized electrical fires.
2. Lockout/tagout is used to:
a. Store tools
✔ b. Prevent accidental equipment startup
c. Label refrigerant
d. Identify ductwork
LOTO procedures prevent unexpected energization during service.
3. When lifting heavy equipment, the technician should:
✔ a. Lift with the legs
b. Twist the back
c. Keep the load far from the body
d. Bend at the waist
Proper lifting uses leg muscles and keeps the load close.
4. A safe ladder angle is:
a. 1:1
, ✔ b. 4:1
c. 6:1
d. 10:1
A 4:1 ratio ensures proper stability.
5. Eye protection should be worn whenever:
a. Outside
b. Handling paperwork
✔ c. Cutting or brazing
d. Working in an office
Brazing and cutting cause sparks and debris.
6. Which gas is produced during welding/brazing in confined spaces?
a. Oxygen
✔ b. Carbon monoxide
c. Nitrogen
d. Neon
Incomplete combustion produces CO.
7. Electrical PPE should be rated for:
✔ a. The voltage being worked on
b. The amperage of the compressor
c. Weather temperature
d. Ladder height
PPE must match circuit voltage.
8. What must be done before servicing any electrical equipment?
a. Add refrigerant
✔ b. Disconnect power
c. Open dampers
d. Check thermostats
Power must be safely removed.
9. In case of a refrigerant leak, the technician should:
a. Ignore it
, ✔ b. Ventilate the area
c. Light a match
d. Lower the temperature
Ventilation prevents asphyxiation or exposure.
10.Hard hats are required:
✔ a. When overhead hazards exist
b. Only on weekends
c. When carrying pipes
d. Only for apprentices
Protects from falling objects.
11.A multimeter should be set to the correct range to:
✔ a. Prevent meter damage
b. Lower voltage
c. Increase current
d. Reduce capacitance
Wrong range can blow fuses or damage meter.
12.Refrigerant frostbite is caused by:
a. High pressure
✔ b. Rapid evaporation of refrigerant
c. Moisture
d. Dirt
Evaporation removes heat rapidly.
13.A vacuum pump exhaust must be:
✔ a. Vented outdoors
b. Vented indoors
c. Sealed shut
d. Pointed downward
Prevents refrigerant contamination indoors.
14.Proper fire extinguisher inspection includes checking:
✔ a. Gauge pressure
EXAM COMPLETE 100 QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND
NEW VERSION!!
1. Which extinguisher type is best for electrical fires?
a. Class A
b. Class B
✔ c. Class C
d. Class D
Class C extinguishers are rated for energized electrical fires.
2. Lockout/tagout is used to:
a. Store tools
✔ b. Prevent accidental equipment startup
c. Label refrigerant
d. Identify ductwork
LOTO procedures prevent unexpected energization during service.
3. When lifting heavy equipment, the technician should:
✔ a. Lift with the legs
b. Twist the back
c. Keep the load far from the body
d. Bend at the waist
Proper lifting uses leg muscles and keeps the load close.
4. A safe ladder angle is:
a. 1:1
, ✔ b. 4:1
c. 6:1
d. 10:1
A 4:1 ratio ensures proper stability.
5. Eye protection should be worn whenever:
a. Outside
b. Handling paperwork
✔ c. Cutting or brazing
d. Working in an office
Brazing and cutting cause sparks and debris.
6. Which gas is produced during welding/brazing in confined spaces?
a. Oxygen
✔ b. Carbon monoxide
c. Nitrogen
d. Neon
Incomplete combustion produces CO.
7. Electrical PPE should be rated for:
✔ a. The voltage being worked on
b. The amperage of the compressor
c. Weather temperature
d. Ladder height
PPE must match circuit voltage.
8. What must be done before servicing any electrical equipment?
a. Add refrigerant
✔ b. Disconnect power
c. Open dampers
d. Check thermostats
Power must be safely removed.
9. In case of a refrigerant leak, the technician should:
a. Ignore it
, ✔ b. Ventilate the area
c. Light a match
d. Lower the temperature
Ventilation prevents asphyxiation or exposure.
10.Hard hats are required:
✔ a. When overhead hazards exist
b. Only on weekends
c. When carrying pipes
d. Only for apprentices
Protects from falling objects.
11.A multimeter should be set to the correct range to:
✔ a. Prevent meter damage
b. Lower voltage
c. Increase current
d. Reduce capacitance
Wrong range can blow fuses or damage meter.
12.Refrigerant frostbite is caused by:
a. High pressure
✔ b. Rapid evaporation of refrigerant
c. Moisture
d. Dirt
Evaporation removes heat rapidly.
13.A vacuum pump exhaust must be:
✔ a. Vented outdoors
b. Vented indoors
c. Sealed shut
d. Pointed downward
Prevents refrigerant contamination indoors.
14.Proper fire extinguisher inspection includes checking:
✔ a. Gauge pressure
