Skills and Trades

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A device used to prevent the reverse flow of a liquid is a(n) _____. a. flow switch b. ... Started by lilldybug07	1 Replies 84 Views	Jul 24, 2018 by karlss
An evaporator pressure regulator is typically _____. a. controlled by an On-Off switch b. ... Started by HudsonKB16	3 Replies 81 Views	Jul 24, 2018 by memslove
Which of the following is not part of the operating sequence of a natural-draft furnace? a. The ... Started by leilurhhh	1 Replies 77 Views	Jul 24, 2018 by debra928
The device used to prove that a burner flame is present in a furnace with hot surface ignition is a ... Started by abern	1 Replies 94 Views	Jul 24, 2018 by diesoon
If a gas furnace consistently cycles off on the temperature limit switch, a likely cause is _____. ... Started by sammy	1 Replies 106 Views	Jul 24, 2018 by huda
Which statement about gas-fired infrared heaters is correct? a. A reverberator is used to reduce ... Started by viki	3 Replies 93 Views	Jul 24, 2018 by shaquita
Net stack temperature identifies _____. a. actual flue gas temperature b. heat lost to the ... Started by littleanan	1 Replies 198 Views	Jul 24, 2018 by srodz
A high temperature rise across a furnace heat exchanger may cause _____. a. condensation in the ... Started by amal	1 Replies 96 Views	Jul 24, 2018 by aruss1303
Why is a traditional room thermostat not the best choice for controlling an infrared heater? a. ... Started by berenicecastro	1 Replies 82 Views	Jul 24, 2018 by patma1981
In a DX system operating normally, the refrigerant leaving the evaporator should be _____. a. all ... Started by scienceeasy	3 Replies 146 Views	Jul 24, 2018 by Sassygurl126
Evaporator cooling capacity is significantly affected by _____. a. suction line pressure drop b. ... Started by go.lag	1 Replies 123 Views	Jul 24, 2018 by ASDFGJLO
If a capillary tube is restricted due to a sharp bend, the _____. a. evaporator will be fed too ... Started by xclash	1 Replies 59 Views	Jul 24, 2018 by tennis14576
A manual expansion valve can be identified by _____. a. the absence of a handle b. an orange ... Started by Garrulous	1 Replies 42 Views	Jul 24, 2018 by deja
What is the effect of an increase in the cooling load on a TXV? a. The superheat decreases, ... Started by meagbuch	3 Replies 50 Views	Jul 24, 2018 by beccamahon
The symptom that most likely indicates the thermostatic element of a TXV has lost its charge is ... Started by Sportsfan2111	1 Replies 40 Views	Jul 24, 2018 by nicoleclaire22
When changing the superheat setting on a TXV, _____. a. the system must be shut down b. the ... Started by mynx	1 Replies 94 Views	Jul 24, 2018 by dpost18
Which of the following statements about condensers is true? a. Before condensing can begin, any ... Started by dakota nelson	1 Replies 60 Views	Jul 24, 2018 by 1_Step_At_ATime
Which type of condenser is generally used only with very small domestic refrigeration systems? a. ... Started by wenmo	3 Replies 93 Views	Jul 24, 2018 by amynguyen1221
When heat is carried from one object to another by means of a liquid or gas, it is being transferred ... Started by michelleunicorn	1 Replies 69 Views	Jul 24, 2018 by hugthug12
When performing GTAW, faster travel speeds prevent heat buildup and produce _____. a. weld ... Started by Medesa	1 Replies 78 Views	Jul 24, 2018 by brbarasa
In the 1F and 2F fillet-welding positions, the weld axis can be inclined up to _____. a. 30 ... Started by BRWH	1 Replies 88 Views	Jul 24, 2018 by shoemake
Compared to an air handler located in a high mountain cabin, what are the airflow requirements per ... Started by Deast7027	3 Replies 69 Views	Jul 24, 2018 by atrochim
What scale on a psychrometric chart can also be referred to as the sensible heat scale? a. ... Started by Destiiny22	1 Replies 48 Views	Jul 24, 2018 by beccamahon
Entrainment is a term often used to describe _____. a. primary air b. secondary air c. ... Started by naturalchemist	1 Replies 206 Views	Jul 24, 2018 by lou
What is the maximum distance between pitot tube measuring points in rectangular ducts? a. 6 ... Started by serike	1 Replies 228 Views	Jul 24, 2018 by wfdfwc23