NATE CORE EXAM 2023 QUESTIONS AND ANSWERS
1kwh of electric power is equivalent to btu per hour.
A. 3142
B. 6412
C. 9412
D. 6812 - ANSWER-A
Gas valves operate at voltage.
A. 120v
B. 230v
C. 24v
D. 12v - ANSWER-C
What will be the resistance in the circuit if the supply voltage is 30v and current flowing
through the circuit is 5A.
A. 3 ohms
B. 1/3 ohms
C. 1/6 ohms
D. 6 ohms - ANSWER-D
Furnaces are placed into categories based upon.
A. Venting characteristics
B. Btuh capacity range
C. Total airflow in CFM
D. Gas valve type - ANSWER-A
An oil separator is located in the
A. Expansion line
B. Liquid line
C. Suction line
D. Discharge line - ANSWER-D
Propane and butane are than air.
A. Same weight
B. Heavier
, NATE CORE EXAM 2023 QUESTIONS AND ANSWERS
C. Lighter - ANSWER-B
Current in a closed circuit is limited by which of the following?
A. Heat
B. Voltage
C. Temperature
D. Resistance - ANSWER-D
use two special helical rotors that introduce suction vapors then compress them.
A. All options are correct
B. Scroll compressors
C. Reciprocating compressors
D. Screw compressors - ANSWER-D
A high pressure steam boiler operates at a pressure greater than
A. 5 psig
B. 15 psig
C. 25 psig
D 20 psig - ANSWER-B
is the heat that is absorbed or extracted when a substance changes its state.
A. Enthalpy
B. Entropy
C. Latent heat
D. Specific heat - ANSWER-C
Sight glass is present at in the refrigeration cycle.
A. Liquid line
B. Evaporation line
C. Suction line
D. Expansion valve - ANSWER-A
When there is an increase in the heat load on the evaporator, the refrigerant will tend to
evaporate at a rate.
A. Slower
B. Faster - ANSWER-B
The higher the ambient temperatures, will be the evacuation time of the
refrigerants from the system.
1kwh of electric power is equivalent to btu per hour.
A. 3142
B. 6412
C. 9412
D. 6812 - ANSWER-A
Gas valves operate at voltage.
A. 120v
B. 230v
C. 24v
D. 12v - ANSWER-C
What will be the resistance in the circuit if the supply voltage is 30v and current flowing
through the circuit is 5A.
A. 3 ohms
B. 1/3 ohms
C. 1/6 ohms
D. 6 ohms - ANSWER-D
Furnaces are placed into categories based upon.
A. Venting characteristics
B. Btuh capacity range
C. Total airflow in CFM
D. Gas valve type - ANSWER-A
An oil separator is located in the
A. Expansion line
B. Liquid line
C. Suction line
D. Discharge line - ANSWER-D
Propane and butane are than air.
A. Same weight
B. Heavier
, NATE CORE EXAM 2023 QUESTIONS AND ANSWERS
C. Lighter - ANSWER-B
Current in a closed circuit is limited by which of the following?
A. Heat
B. Voltage
C. Temperature
D. Resistance - ANSWER-D
use two special helical rotors that introduce suction vapors then compress them.
A. All options are correct
B. Scroll compressors
C. Reciprocating compressors
D. Screw compressors - ANSWER-D
A high pressure steam boiler operates at a pressure greater than
A. 5 psig
B. 15 psig
C. 25 psig
D 20 psig - ANSWER-B
is the heat that is absorbed or extracted when a substance changes its state.
A. Enthalpy
B. Entropy
C. Latent heat
D. Specific heat - ANSWER-C
Sight glass is present at in the refrigeration cycle.
A. Liquid line
B. Evaporation line
C. Suction line
D. Expansion valve - ANSWER-A
When there is an increase in the heat load on the evaporator, the refrigerant will tend to
evaporate at a rate.
A. Slower
B. Faster - ANSWER-B
The higher the ambient temperatures, will be the evacuation time of the
refrigerants from the system.
