Page 1 of 26
Nocti Hvac Final Exam ALL QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS
YEAR
QUESTION: The best tool to open and close the stem access valve on a refrigeriation system is
the_______ - ANSWER-Refrigeration service wrench
QUESTION: Which power tool is best to cut steel rod? - ANSWER-Sawzall
QUESTION: CSST (steal tubing) connections - ANSWER-can be used with both natural and
propane gas equipment
QUESTION: The type of pipe commonly used for condensation drainage on central air
conditioning system is - ANSWER-PVC
QUESTION: When pressure testing completed copper tubing assembly with pressuried nitrogen
the nitrogen cylinder should - ANSWER-always be on the ground
1
, Page 2 of 26
QUESTION: connections should be permanently connected with_____ on drainage piping
assemblies that uses PVC piping - ANSWER-Glue specified for PVC pipe
QUESTION: Using oxygen to purge copper tubing after brasing - ANSWER-could cause and
explosion
QUESTION: Two gases that considered non-condensable in a refrigeration - ANSWER-Air and
Nitrogen
QUESTION: Residential air condition system have a super heat range of ____ degress under
normal operating conditions? - ANSWER-8 to 12
QUESTION: which is not a condition of low superheat on an air conditioning system - ANSWER-
Refrigerant undercharged
QUESTION: The reason that subcooling would be below 8 degrees on air conditiong system -
ANSWER-dirty or blocked condenser coil
2
, Page 3 of 26
Q; An Hvac system that depends on the temperatures below the ground surface as an
operation factor is a .. - ANSWER-Geothermal heat pump
QUESTION: when putting out a fire involving oily rags use a ________ fire extinguisher? -
ANSWER-Class B
QUESTION: The cause for exessive subcoolinf in an air conditoning system ? - ANSWER-system
operating in low abient conditions
QUESTION: when reading blue prints for proper wall and duct location, the technician should
look at the ______ - ANSWER-Floor plan
QUESTION: When trouble shooting an air conditioning system, the operating pressures mare 40
psig on the low side and 116 in the high side, what would be the most likely problem? -
ANSWER-Refrigerant Leak
3
Nocti Hvac Final Exam ALL QUESTIONS AND
CORRECT ANSWERS LATEST UPDATE THIS
YEAR
QUESTION: The best tool to open and close the stem access valve on a refrigeriation system is
the_______ - ANSWER-Refrigeration service wrench
QUESTION: Which power tool is best to cut steel rod? - ANSWER-Sawzall
QUESTION: CSST (steal tubing) connections - ANSWER-can be used with both natural and
propane gas equipment
QUESTION: The type of pipe commonly used for condensation drainage on central air
conditioning system is - ANSWER-PVC
QUESTION: When pressure testing completed copper tubing assembly with pressuried nitrogen
the nitrogen cylinder should - ANSWER-always be on the ground
1
, Page 2 of 26
QUESTION: connections should be permanently connected with_____ on drainage piping
assemblies that uses PVC piping - ANSWER-Glue specified for PVC pipe
QUESTION: Using oxygen to purge copper tubing after brasing - ANSWER-could cause and
explosion
QUESTION: Two gases that considered non-condensable in a refrigeration - ANSWER-Air and
Nitrogen
QUESTION: Residential air condition system have a super heat range of ____ degress under
normal operating conditions? - ANSWER-8 to 12
QUESTION: which is not a condition of low superheat on an air conditioning system - ANSWER-
Refrigerant undercharged
QUESTION: The reason that subcooling would be below 8 degrees on air conditiong system -
ANSWER-dirty or blocked condenser coil
2
, Page 3 of 26
Q; An Hvac system that depends on the temperatures below the ground surface as an
operation factor is a .. - ANSWER-Geothermal heat pump
QUESTION: when putting out a fire involving oily rags use a ________ fire extinguisher? -
ANSWER-Class B
QUESTION: The cause for exessive subcoolinf in an air conditoning system ? - ANSWER-system
operating in low abient conditions
QUESTION: when reading blue prints for proper wall and duct location, the technician should
look at the ______ - ANSWER-Floor plan
QUESTION: When trouble shooting an air conditioning system, the operating pressures mare 40
psig on the low side and 116 in the high side, what would be the most likely problem? -
ANSWER-Refrigerant Leak
3
