PRACTICE RESIDENTIAL AIR CONDITIONING (NATE CERTIFICATION)
EXAM WITH ALL CORRECT & 100% VERIFIED ANSWERS|ALREADY
GRADED A+
1. After a vacuum pump has been used, a
The correct answer is: Ex-
continuous pressure rise in the system most
istence of a leak.
likely indicates the:
The correct answer is:
2. After a vacuum has been pulled to 500
Presence of moisture.
microns, a pressure rise in a system, followed
by a leveling-off at 1500 microns, most likely
indicates the: The correct answer is: In-
suflcient airflow.
3. On initial start-up of an air-conditioning
system, the temperature drop measured
across the evaporator coil exceeds
manufacture's specifications. This condi- tion
most likely indicates a/an:
4. The technician is on a spring maintenance check of an The correct
answer is:
air conditioning system. They find the Overcharge of refrigerant.
following:
•Head pressure is higher than normal.
•Suction pressure is higher than normal.
•Superheat is 0°F.
•Condenser is clean.
•Outdoor fan operation is normal.
•Sub-cooling is 25°F.
Which of the following is most likely the
problem?
5. Which one of the following can be caused by a restrict- The correct
answer is: Low
ed air filter?
7. Across an R-
6. Which of the following would most likely 22 suction
occur if a crankcase heater fails? line drier,
1/
7
, PRACTICE RESIDENTIAL AIR CONDITIONING (NATE CERTIFICATION)
EXAM WITH ALL CORRECT & 100% VERIFIED ANSWERS|ALREADY
GRADED A+
how much pressure drop indicates changingsuperheat.
the drier?
The correct answer is: Ex- cess
refrigerant may mi-
grate to the
crankcase.
The correct answer is: 3
psig.
8.
2/
7
EXAM WITH ALL CORRECT & 100% VERIFIED ANSWERS|ALREADY
GRADED A+
1. After a vacuum pump has been used, a
The correct answer is: Ex-
continuous pressure rise in the system most
istence of a leak.
likely indicates the:
The correct answer is:
2. After a vacuum has been pulled to 500
Presence of moisture.
microns, a pressure rise in a system, followed
by a leveling-off at 1500 microns, most likely
indicates the: The correct answer is: In-
suflcient airflow.
3. On initial start-up of an air-conditioning
system, the temperature drop measured
across the evaporator coil exceeds
manufacture's specifications. This condi- tion
most likely indicates a/an:
4. The technician is on a spring maintenance check of an The correct
answer is:
air conditioning system. They find the Overcharge of refrigerant.
following:
•Head pressure is higher than normal.
•Suction pressure is higher than normal.
•Superheat is 0°F.
•Condenser is clean.
•Outdoor fan operation is normal.
•Sub-cooling is 25°F.
Which of the following is most likely the
problem?
5. Which one of the following can be caused by a restrict- The correct
answer is: Low
ed air filter?
7. Across an R-
6. Which of the following would most likely 22 suction
occur if a crankcase heater fails? line drier,
1/
7
, PRACTICE RESIDENTIAL AIR CONDITIONING (NATE CERTIFICATION)
EXAM WITH ALL CORRECT & 100% VERIFIED ANSWERS|ALREADY
GRADED A+
how much pressure drop indicates changingsuperheat.
the drier?
The correct answer is: Ex- cess
refrigerant may mi-
grate to the
crankcase.
The correct answer is: 3
psig.
8.
2/
7
