Skills and Trades

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Fiberboard duct is joined: A) With staples and UL 181A tape. B) With tape and mastic. C) With ... Started by gbarreiro	1 Replies 93 Views	Jul 24, 2018 by atrochim
Air-source packaged heat pumps are commonly available in: A) Top discharge, bottom discharge, and ... Started by cherise1989	1 Replies 33 Views	Jul 24, 2018 by kbennett34
Two types of takeoff fittings available for sheet metal duct include: A) Weld-on stubs, preformed ... Started by @Brianna17	1 Replies 78 Views	Jul 24, 2018 by Harbringer
How are motorized dampers controlled when they are used as bypass dampers? A) A pressurestat ... Started by mwit1967	3 Replies 11 Views	Jul 24, 2018 by dantucker
What is the lowest water temperature required for effective radiant floor heating? A) 75F to 90F ... Started by abern	1 Replies 36 Views	Jul 24, 2018 by olivia_paige29
A variable-air-volume system changes the amount of air the fan delivers in order to: A) Bypass ... Started by james0929	1 Replies 95 Views	Jul 24, 2018 by yifu223
What capacity system will provide the best dehumidification in cooling for a house with a design ... Started by Charlie	1 Replies 9 Views	Jul 24, 2018 by hanadaa
When cleaning up after a compressor burnout, immediately after you recover the refrigerant, you ... Started by Redwolflake15	3 Replies 231 Views	Jul 24, 2018 by b614102004
The majority of air leaks in sheet metal duct systems occur: A) Along the lengthwise seam in the ... Started by karateprodigy	1 Replies 49 Views	Jul 24, 2018 by skipfourms123
The mixing valve controls the temperature of water supplied to the: A) Supply pump. B) Radiant ... Started by karateprodigy	1 Replies 41 Views	Jul 24, 2018 by juwms
Why is testing and balancing an important part of HVACR residential systems? A) Because HVACR ... Started by cdr_15	1 Replies 86 Views	Jul 24, 2018 by okolip
The bypass plug is removed for the operation of what kind of system? A) Two-pipe system B) ... Started by kaid0807	3 Replies 50 Views	Jul 24, 2018 by Awesome
The most common cause of airflow-related problems in air-conditioning units is: A) Dirty ... Started by brutforce	1 Replies 34 Views	Jul 24, 2018 by lindahyatt42
What are TAB contractors commissioned to do on HVACR systems? A) Perform quality control checks ... Started by silviawilliams41	1 Replies 25 Views	Jul 24, 2018 by DylanD1323
A two-pipe system should be installed with the suction at the oil pump greater than what measure? ... Started by luvbio	1 Replies 34 Views	Jul 24, 2018 by meltdown117
How do mixing valves save energy? A) By reusing loop water for domestic hot water B) By ... Started by vHAUNG6011	3 Replies 123 Views	Jul 24, 2018 by wergv
If the liquid oil acid test kit cannot be used, indicators may be used to connect to the: A) ... Started by mia	1 Replies 67 Views	Jul 24, 2018 by mjenn52
How does a duct blaster measure air leakage in duct systems? A) It measures the airflow required ... Started by plus1	1 Replies 35 Views	Jul 24, 2018 by enass
What is the purpose of shutoff valves in the water loop of a water-source heat pump? A) They ... Started by oliviahorn72	1 Replies 69 Views	Jul 24, 2018 by Ptupou85
TAB stands for: A) Temperature adjusting and balancing. B) Trimming and balancing. C) Testing ... Started by altibaby	3 Replies 56 Views	Jul 24, 2018 by joshbk44
What type of heat pumps are commonly installed above the drop ceiling in each zone in a commercial ... Started by futuristic	1 Replies 11 Views	Jul 24, 2018 by soda0602
If the compressor oil on a hermetic compressor is acidic, the next step is to change the: A) ... Started by kamilo84	1 Replies 15 Views	Jul 24, 2018 by deja
Using the percentage of design flow method, a system that leaks 100 CFM in a system with a design ... Started by shenderson6	1 Replies 94 Views	Jul 24, 2018 by mcabuhat
What type of heat exchanger coil is best suited for water-source heat pumps using an open-loop well ... Started by captainjonesify	3 Replies 78 Views	Jul 24, 2018 by meltdown117
Before opening the compressor crankcase to take an oil sample, you should: A) Get the sample tube ... Started by gonzo233	1 Replies 91 Views	Jul 24, 2018 by kbennett34