AC/Heat Pump Final Study Questions , easy for some Im sure

[MTI STUDENT]

1.In a heat pump thermostat explain the operation of the two stage heating mode?
2.What is the purpose of the filter dryer?
3.What are the internal parts of a reversing valve?
4.Why does a heat pump need two metering devices?
5.Why is a TEV a better metering device for the heat mode?
6.Why are check valves used in heat pumps?
7.What is the purpose of a suction line accumulator in a heat pump?
8.Name 3 situations were accumulators are needed to protect the compressor in a heat pump?
9.Why are compressor crankcase heaters necessary?
10.List 4 conditions in which a defrost circuit may be activated?
11.explain why supplemental / auxiliary heat is required on all air to air heat pumps?
12.What does the OAT control and why is it needed?
13.What is the purpose of the Hold back thermostat ?
14.Why is the bleed holes very small?
15.How can the Metering devices be arranged in the heat pump system?
16.What type of charge does the sensing bulb in a TEV have?
17.Explain the use and operation of a bi-flow dryer ?
18.What is the industry standard for determining the heat gain of a residential system?
19.What is the minimum SEER rating for a new system?
20.Why are sections of pipe sometimes swagged ?
21.For a system using a non - TEV metering device such as a fixed orifice / what method can be used to determine that the refrigerant charge is adequate ?
22.What is the typical temperature differential setting between a heat pump running in 1st stage and calling for 2nd stage?
23.Describe Balance point?
24.Name 3 parts found in a heat pump not found in a/c?
25.How is SEER calculated?
26.Explain demand and timed system responses?
27.Explain passive recovery in detail?
28.Explain active recovery in detail?
29.The E.A.T. - L.A.T * ?
30.If the suction line has a restriction the pressure will be ?
31.What measures wet bulb and dry bulb temps?
32.Define wet bulb temp?
33.Define dry bulb temp?
34. What could cause a liquid line restriction ? - List 3 answers
35.Typically heat pump supply air should range from ____ to _____?
36._____ ______ can eliminate the use of a accumulator?
37.Explain how to get superheat?
38.Explain how to get sub-cooling?
39.Area x Velocity * _________
40.What type of heat pump has no need for defrost cycle?



This is a start and I do understand this is all probably common knowledge to you pro's , but thought I would share .

[heatseeker]

Is this an open book test? You put some time into this post much appreciated. I can answer most questions But on a few of them I would probably get wrong. Anyways 90% would be a good goal to shoot for, just go through the book and find the answers one by one, is there a particular question you are having problems with or are you going to ace it?

[MTI STUDENT]

no books or phones allowed in the class on test days , for the most part I have got it down Out of the 200 questions I know I can get 90% of them . The final is actually every test we took the past 8 weeks so I have a great study guide at least.It also helps I corrected any missed answer so I have the right ones on every test. Happy to share was hoping not to bore you all .

[heatseeker]

not boring just reminding me of how much i don't know.

[MTI STUDENT]

Wondering if what we are learning will help when we hit the field?

[heatseeker]

The bottom line in this field is on the job training. As with anything in life though the book smarts will catch up to you over time. Then you can apply it as you mature. It does take hands on experience to really sink it in.