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HVAC TEST QUESTIONS AND ANSWERS
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HVAC TEST QUESTIONS AND ANSWERS
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HVAC TEST QUESTIONS AND ANSWERSYou are the refrigeration engineer running a 2000 - ton centrifugal refrigeration system.
The system supplies chilled water to a college campus with multiple buildings. You have
normal chilled water load about 1800 tons when the refrigeration system suddenly stops
and shuts down. The panel display on the refrigeration system indicates that the
problem is with the water flow. of the following, which immediate action would be best? -
Answers -check the condenser water pump and re-start the refrigeration system
The sole refrigeration engineer on duty in a building is permitted to leave the building
when the refrigeration system is in operation only when? - Answers -relieved by another
licensed refrigeration engineer
This is a reciprocating compressor using R-22 refrigerant. Identify the object contained
in the red box, explain the purpose of it? - Answers -oil charging port, allows for the
addition and removal of oil from the compressor
In most semi-hermetic compressors, the suction vapor is used to? - Answers -cool the
motor
2.5 Gallons of water equals what? - Answers -2.5 gallons of water weighs 20.8 pounds
How many live conductors are in three-phase 460-volt circuit - Answers -3
The discharge pressure that can be developed by a centrifugal compressor is
determined by: - Answers -the motor speed
Of the following, which one is the best reason for using portable gauge manifolds with
connected flexible hoses in place of fixed gauges and service valves? - Answers -for
known gauge accuracy
Fusible plugs are inadequate pressure relief devices when: - Answers -overpressure is
caused by anything other than heat
While conducting a routine tour of plant operations, a refrigeration engineer observes a
significant increase in the superheat temperature for the refrigerant entering a
reciprocating compressor.. the most likely cause for this condition is: - Answers -scale
particles lodged in the TXV valve port
What could result if a steam turbine is operated at critical speed? - Answers -destructive
vibration could result
At 14.7 psia, a mercury barometric column is 29.92 inches high. When the barometer
shows a column height of 26 inches? - Answers -12.77 psia
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