HVAC Final Exam, unit 14 Questions And Answers 100% Pass
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Course
HVAC
Institution
HVAC
HVAC Final Exam, unit 14 Questions And
Answers 100% Pass
When a water regulating valve is used to control the head pressure of a water-cooled system, the
valve's spring is acting against which pressure to modulate the water flow? - answerHead
pressure of the system
To prove that the combustion...
HVAC Final Exam, unit 14 Questions And
Answers 100% Pass
When a water regulating valve is used to control the head pressure of a water-cooled system, the
valve's spring is acting against which pressure to modulate the water flow? - answer✔Head
pressure of the system
To prove that the combustion blower motor is operating before ignition, a ______ would be
used. - answer✔Sail switch
The difference between system overshoot and system lag is called? - answer✔Temperature
swing
The purpose of a heat anticipator is to_____. - answer✔Reduce the temperature swing of a
conditioned space
To control ice build-up on a heat pump outdoor coil in the heating cycle, a ____ is attached to a
large diaphragm. - answer✔Microswitch
A low pressure control has a "high event" and a "differential" setting. The technician wants the
system to turn on at 28 psig and shut down at 2 psig. What would be the proper settings? -
answer✔High event: 28 psig, differential: 26 psig
Line voltage thermostats have heavier and use which type of sensing element? - answer✔all of
the above
The heater in the thermostat control circuit in the cooling mode is active when the -
answer✔Cooling contact is open
If the suction pressure of a system is 60 psi and the oil pump is 85 psig, what is the net oil
pressure? - answer✔25 psig
What is meant by the term "detent" ? - answer✔Rapid making breaking of a contact
The ______ must determine what the current flow is through the heating control circuit. -
answer✔heating technician
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