NATE Air Conditioning Installation & Service
Practice Questions Latest Update 2025-2026 50
Questions and 100% Verified Correct Answers
Guaranteed A+
A compressor is short cycling. Which of the following would not be the cause?
A.) Low pressure controller differential set too close
B.) Automatic reset high pressure control differential set too close
C.) Low refrigerant charge
D.) Leaking compressor suction valve - CORRECT ANSWER: D.) Leaking compressor
suction valve
A condensing unit should be mounted on a slab that is level to:
A.) allow an accumulated water to evenly run out of the cabinet
B.) increase airflow through the fin area
C.) prevent the unit from tipping over
D.) make certain any top discharge air blows straight up - CORRECT ANSWER: A.)
allow any accumulated water to evenly run out of the cabinet
A double suction riser is used to:
A.) help improve refrigerant return
B.) allow the compressor to pump at a greater capacity
C.) decrease suction line resistance
D.) improve oil return as system capacity changes - CORRECT ANSWER: D.) improve
oil return as system capacity changes
A good evacuation of a refrigerant circuit to remove non-condensables will help insure:
, A.) higher condensing temperatures
B.) higher suction pressures
C.) low suction line pressure drop
D.) higher efficiency and capacity - CORRECT ANSWER: D.) higher efficiency and
capacity
A grille equipped with a damper control is called:
A.) vane
B.) register
C.) louver
D.) damper - CORRECT ANSWER: B.) register
A liquid line with a low to normal high side pressure is an indication of:
A.) An overcharged system
B.) An undercharged system
C.) Air in the system
D.) A restricted filter-drier - CORRECT ANSWER: B.) An undercharged system
A lockout relay is also called:
A.) an impedance replay
B.) reset relay
C.) neither A or B
D.) both A and B - CORRECT ANSWER: D.) both A and B
A parallel compressor system in which both the crankcase oil level and refrigerant gas
pressure are equalized is a:
A.) double pipe crankcase equalizer system
B.) single pipe crankcase equalizer system
Practice Questions Latest Update 2025-2026 50
Questions and 100% Verified Correct Answers
Guaranteed A+
A compressor is short cycling. Which of the following would not be the cause?
A.) Low pressure controller differential set too close
B.) Automatic reset high pressure control differential set too close
C.) Low refrigerant charge
D.) Leaking compressor suction valve - CORRECT ANSWER: D.) Leaking compressor
suction valve
A condensing unit should be mounted on a slab that is level to:
A.) allow an accumulated water to evenly run out of the cabinet
B.) increase airflow through the fin area
C.) prevent the unit from tipping over
D.) make certain any top discharge air blows straight up - CORRECT ANSWER: A.)
allow any accumulated water to evenly run out of the cabinet
A double suction riser is used to:
A.) help improve refrigerant return
B.) allow the compressor to pump at a greater capacity
C.) decrease suction line resistance
D.) improve oil return as system capacity changes - CORRECT ANSWER: D.) improve
oil return as system capacity changes
A good evacuation of a refrigerant circuit to remove non-condensables will help insure:
, A.) higher condensing temperatures
B.) higher suction pressures
C.) low suction line pressure drop
D.) higher efficiency and capacity - CORRECT ANSWER: D.) higher efficiency and
capacity
A grille equipped with a damper control is called:
A.) vane
B.) register
C.) louver
D.) damper - CORRECT ANSWER: B.) register
A liquid line with a low to normal high side pressure is an indication of:
A.) An overcharged system
B.) An undercharged system
C.) Air in the system
D.) A restricted filter-drier - CORRECT ANSWER: B.) An undercharged system
A lockout relay is also called:
A.) an impedance replay
B.) reset relay
C.) neither A or B
D.) both A and B - CORRECT ANSWER: D.) both A and B
A parallel compressor system in which both the crankcase oil level and refrigerant gas
pressure are equalized is a:
A.) double pipe crankcase equalizer system
B.) single pipe crankcase equalizer system
