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NOCTI HVAC Study Guide Questions Answered Correctly – Expert Latest Version 2024/2025
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NOCTI HVAC Study Guide Questions Answered Correctly – Expert Latest Version 2024/2025
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NOCTI HVAC Study Guide Questions AnsweredCorrectly – Expert Latest Version 2024/2025
An Hvac system that depends on the temperatures below the ground surface as an
operation factor is a .. - ANSWER Geothermal heat pump
when putting out a fire involving oily rags use a ________ fire extinguisher? -
ANSWER Class B
The best tool to open and close the stem access valve on a refrigeriation system is
the_______ - ANSWER Refrigeration service wrench
Which power tool is best to cut steel rod? - ANSWER Sawzall
CSST (steal tubing) connections - ANSWER can be used with both natural and
propane gas equipment
The type of pipe commonly used for condensation drainage on central air
conditioning system is - ANSWER PVC
When pressure testing completed copper tubing assembly with pressuried nitrogen
the nitrogen cylinder should - ANSWER always be on the ground
connections should be permanently connected with_____ on drainage piping
assemblies that uses PVC piping - ANSWER Glue specified for PVC pipe
Using oxygen to purge copper tubing after brasing - ANSWER could cause and
explosion
Two gases that considered non-condensable in a refrigeration - ANSWER Air and
Nitrogen
Residential air condition system have a super heat range of ____ degress under
normal operating conditions? - ANSWER 8 to 12
which is not a condition of low superheat on an air conditioning system - ANSWER
Refrigerant undercharged
The reason that subcooling would be below 8 degrees on air conditiong system -
ANSWER dirty or blocked condenser coil
The cause for exessive subcoolinf in an air conditoning system ? - ANSWER
system operating in low abient conditions
, when reading blue prints for proper wall and duct location, the technician should look
at the ______ - ANSWER Floor plan
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
When trouble shooting an air conditioning system and you notice frost on the suction
line, what would be the problem? - ANSWER Dirty air filter
An Hvac system that depends on the temperatures below the ground surface as an
operation factor is a/an______? - ANSWER geothermal heat pump
The best tool to open and close the system access valve on a refrigeration system is
the wrench. - ANSWER Geothermal heat pump
when pressure testing a completed copper tubing assembly with pressurized nitrgen
cylinders should - ANSWER always be used with a regulator
a 14-gauge soild copper wire would require____amp circuit protection - ANSWER
15 amps
in a 24V circuit containing a switch and coil, it will read 24V at the coil if the -
ANSWER switched is closed
A theremocouple produces _______ when heat is applied - ANSWER DC voltage
in 120VC AC circuit, if the total circuit draws 5 amps the wattage is - ANSWER 600
Capacitors are rated in - ANSWER Volts and micro farads
The refrigerant enter the condenser as a - ANSWER High pressure vapor
the compressor's main function is to - ANSWER create presssure diffrence
scroll compressors are cooled by Ac and - ANSWER Suction vaper
what tool is used to check the gas pressure - ANSWER Manometers
incomplete combustion produces - ANSWER carbon monoxide
a sub- base of a T-stat should be mounted - ANSWER level
For complete combustion in a boiler or furnance to occur,_______ should _____ be
present - ANSWER Oxygen, Spark, and fuel
Its recomended that mainatence on an oil boiler or furance be performed every... -
ANSWER Year
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