Hvac final correct stuvia - Study guides, Class notes & Summaries
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HVAC-R Final Exam Correct 100%(RATED A+)
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volt amps - ANSWER Transformers are normally rated in? 
 
true - ANSWER An insulated jumper may be used to temporarily jump a component in an electrical circuit(true or false)? 
 
divided by 10 - ANSWER When using a 10 wrap multiplier the reading on the meter must be? 
 
ladder diagram - ANSWER An electrical line wiring diagram is often called? 
 
pictorial diagram - ANSWER A wiring diagram that shows the approximate location of components is called? 
 
clamp on ammeter - ANSWER A 10 wrap ampera...
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HVAC final exam, unit 14 Correct Questions & Answers.
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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 temp...
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HVAC Final Exam 7 Correct Questions & Answers(RATED A+)
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AC is an electron flow that _________________________ - ANSWER alternates back and fourth 
 
The ______ is often used as a graphical representation of alternating current - ANSWER sine wave 
 
when a conductor rotates through one complete revolution it has generated _____ flow reversals - ANSWER two 
 
the __________of alternating current is the number of complete cycles that occur in a second. - ANSWER frequency 
 
Alternating current reaches a peak at ________________ electrical degrees - ANSW...
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HVAC Final Exam 5 Correct Questions & Answers(RATED A+)
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A load is an electrical device that _____________________________ - ANSWER uses electricity to do useful work 
 
A disconnect switch is used to __________ - ANSWER open and close the main power source to a piece of equipment 
 
which of the following are not components of a contactor or relay? - ANSWER thermal element 
 
Loads are electrical devices that consume electricity to do _______________ work - ANSWER useful 
 
_____ are devices such as motors solenoids resistance heaters and other curre...
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HVAC final exam, unit 14 Correct 100%(Rated A+)
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To control ice build-up on a heat pump outdoor coil in the heating cycle, a ____ is attached to a large diaphragm. - ANSWER Microswitch 
 
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 opening or closing of a contact 
 
The heat anticipator in the therm...
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HVAC Final Exam Correct Questions & Answers(RTED A+)
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What is an HVAC System? - ANSWER all the items needed to maintain thermal comfort within a space or group of spaces 
 
What are the four components of an HVAC system? - ANSWER Fans 
Pumps 
Compressor 
Evaporator 
 
What is a PTAC? - ANSWER Packaged Terminal Air Conditioner 
 
What is a PTHP? - ANSWER Packaged Terminal Heat Pump 
 
List the heat transfer equipment (3) - ANSWER Boiler 
Chiller 
Coil 
 
What is a zone? - ANSWER A zone is a separately controlled space or group spaces 
 
What is VAV ...
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HVAC final exam, unit 15 Correct 100%(GRADED A+)
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A control can be which of the following? - ANSWER All of the above 
 
An example of a power consuming device would be a(n) ____ while an example of a non-power consuming device would be a(n) _____. - ANSWER Light bulb, single-pole single-throw switch 
 
An electrical power consuming component. - ANSWER is also known as a load 
 
The line side of a switch is the. - ANSWER side the power source is connected to 
 
If an air conditioning system is calling for cooling and the compressor is running bu...
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