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Nocti Hvac study guide Questions and Correct Answers
(a) Question :When one rises into the atmosphere, the
atmospheric pressure decreases by 1 psi for every
- 2,343 feet
- 3,343 feet
- 2,500 feet
- 5,280 feet
Correct answer:2,343 feet
Question :geothermal heat pump
Correct answer:An HVAC system that depends on the
temperatures below the ground surface as an operation factor is a
Question :Class B
Correct answer:When putting out a fire involving oily rags
use a _______ fire extinguisher
Question :refrigeration service
Correct answer:the best tool to open and close the stem access
valve on a refrigertion system is the _____ wrench
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Question :sawzall
Correct answer:Which power tool is best used for cutting steel
rod?
Question :floor plan
Correct answer:When reading blueprints for a proper wall and
duct location, the technician should look at
Question :can be used with both natural gas and propane
equipment
Correct answer:CSST (Corrugated Stainless Steel Tubing)
connections
Question :PVC
Correct answer:The type of pipe commonly used for
condensation drainage on central air conditioning system is
Question :always be on the regulator
Correct answer:When pressure testing a completed copper
tubing assembly with pressurized nitrogen, the nitrogen cylinder should
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Question :glue specified for PVC pipe
Correct answer:Connections should be permanently
connected with _____ on drainage piping asemblies that use PVC piping
Question :could cause an explosion
Correct answer:using oxygen to purge copper tubing after
brazing
Question :Two gases that considered non-condensable in a
refrigeration
Correct answer:Air and Nitrogen
Question :Residential air condition system have a super heat
range of ____ degress under normal operating conditions?
Correct answer:8 to 12
Question :which is not a condition of low superheat on an air
conditioning system
Correct answer:Refrigerant undercharged
Question :The reason that subcooling would be below 8
degrees on air conditiong system
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Correct answer:dirty or blocked condenser coil
Question :The cause for exessive subcoolinf in an air
conditoning system ?
Correct answer:system operating in low abient conditions
Question :when reading blue prints for proper wall and duct
location, the technician should look at the ______
Correct 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?
Correct answer:Refrigerant Leak
Question :When trouble shooting an air conditioning system
and you notice frost on the suction line, what would be the problem?
Correct answer:Dirty air filter
Question :An Hvac system that depends on the temperatures
below the ground surface as an operation factor is a/an______?