Skills and Trades

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In communicating systems, fault history, system run time, system status, and other helpful service ... Started by joe	3 Replies 30 Views	Jul 24, 2018 by karmakat49
The reversing valve reverses the direction of refrigerant flow: A) And reverses the function of ... Started by j.rubin	1 Replies 37 Views	Jul 24, 2018 by fffftttt
Why should the temperature inside the compressor be kept under 300F? A) Because the metal ... Started by BrownTown3	1 Replies 23 Views	Jul 24, 2018 by perkiness
A residential A/C system that cools in summer and heats in winter by reversing the flow of ... Started by mspears3	1 Replies 95 Views	Jul 24, 2018 by bfulkerson77
A unit's communicating status can be determined by: A) Ohming the communication lines. B) ... Started by KWilfred	3 Replies 12 Views	Jul 24, 2018 by kilada
The amount of outside air introduced can be controlled using: A) A CO sensor. B) An O2 sensor. C) ... Started by mynx	1 Replies 9 Views	Jul 24, 2018 by aham8f
On a starting relay, the component can be tested to see if it is electrically acceptable using a ... Started by Caiter2013	1 Replies 8 Views	Jul 24, 2018 by daiying98
What is the major advantage of mini-split air-conditioning systems? A) Shorter line sets B) Lower ... Started by Cooldude101	1 Replies 34 Views	Jul 24, 2018 by Meganchabluk
The permanent suction line on a reversing valve is always located: A) On the left on the side ... Started by Charlie	3 Replies 197 Views	Jul 24, 2018 by Madisongo23
Window unit air conditioners are designed primarily to supply cool air to: A) Several rooms in a ... Started by mcmcdaniel	1 Replies 18 Views	Jul 24, 2018 by Tonyam972
Why does the air's relative humidity affect comfort? A) Water molecules in the air act as thermal ... Started by shofmannx20	1 Replies 10 Views	Jul 24, 2018 by Fayaz00962
The standard ceiling height in a single family residence is: A) 7 ft. B) 12 ft. C) 8 ft. D) 10 ... Started by madam-professor	1 Replies 10 Views	Jul 24, 2018 by CharlieArnold
Why did the development of 80 percent efficient furnaces using draft-inducer fans present a problem ... Started by khang	3 Replies 8 Views	Jul 24, 2018 by stallen
What component is responsible for reversing the flow of refrigerant in a heat pump? A) The check ... Started by biggirl4568	1 Replies 32 Views	Jul 24, 2018 by Jsherida
How are Category IV furnaces generally vented? A) Stainless steel B) Flexible foil C) PVC venting ... Started by acc299	1 Replies 48 Views	Jul 24, 2018 by itsakadoozi
PTAC and window-unit air conditioners often use rotary compressors, which are effective but ... Started by genevieve1028	1 Replies 67 Views	Jul 24, 2018 by daiying98
In the cooling season, the comfort level can be improved at higher temperatures: A) By removing ... Started by melina_rosy	3 Replies 76 Views	Jul 24, 2018 by aliotak
The perimeter of a large multistory high-rise building consists of: A) The most important areas. ... Started by jerry coleman	1 Replies 30 Views	Jul 24, 2018 by mohan
The primary advantages of room air conditioners include: A) Relatively low cost and ease of ... Started by deesands	1 Replies 25 Views	Jul 24, 2018 by jackie
Physically active people feel more comfortable at: A) Lower temperatures. B) Higher humidity. C) ... Started by pepyto	1 Replies 57 Views	Jul 24, 2018 by dajones82
Which part of a large office building generally requires cooling all year, even when it is cold ... Started by urbanoutfitters	3 Replies 15 Views	Jul 24, 2018 by nekcihc358
The air-conditioning system rough-in work normally begins: A) After all the interior walls are ... Started by clippers!	1 Replies 28 Views	Jul 24, 2018 by aidanmbrowne
What is a vent connector? A) The vent connector is the collar on the gas appliance where the vent ... Started by asmith134	1 Replies 31 Views	Jul 24, 2018 by sailorcrescent
In a single-zone constant-volume system, which floors only have provisions for cooling? A) Every ... Started by plus1	1 Replies 21 Views	Jul 24, 2018 by nanny
A common problem with larger window air-conditioning units used in older homes is: A) Nuisance ... Started by hubes95	3 Replies 82 Views	Jul 24, 2018 by mochi09