Skills and Trades

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Common air conditioning controls are switches that open or close based on a monitored condition such ... Started by BRWH	1 Replies 84 Views	Jul 24, 2018 by tdewitt
When air enters a low-pressure system, it collects in the condenser because: A) A small amount of ... Started by B	3 Replies 21 Views	Jul 24, 2018 by voltaire123
The two types of load calculations outlined in Manual J8 are: A) Residential load procedure and ... Started by sammy	1 Replies 12 Views	Jul 24, 2018 by jointhecircus
A major difference between the operation of an oil furnace and a gas furnace is that: A) Oil has ... Started by Themember4	1 Replies 52 Views	Jul 24, 2018 by shayla
In a water-cooled condenser, the higher the number of passes of water through the shell, the greater ... Started by frankwu	1 Replies 63 Views	Jul 24, 2018 by nyrave
Oversized equipment operates: A) At the same efficiency as correctly sized equipment. B) About ... Started by Ebrown	3 Replies 50 Views	Jul 24, 2018 by mtmmmmmk
What components of the oil burner are responsible for atomizing the oil? A) The oil pump and ... Started by EY67	1 Replies 74 Views	Jul 24, 2018 by CharlieArnold
Test gases that may be safely used to test for leaks include: A) Acetylene. B) Compressed air. C) ... Started by silviawilliams41	1 Replies 19 Views	Jul 24, 2018 by tandmlomax84
An efficient and trouble-free air conditioning system installation is more likely if the ... Started by jasdeep_brar	1 Replies 44 Views	Jul 24, 2018 by qytan
Air filters that work by passing the air and contaminants through a media and trapping the ... Started by robinn137	3 Replies 47 Views	Jul 24, 2018 by kjohnson
What type of compressor is most often used in large chillers? A) Reciprocating B) Scroll C) ... Started by iveyjurea	1 Replies 48 Views	Jul 24, 2018 by zacnyjessica
When the unit is operating, the refrigerant cylinder pressure will be: A) Less than the back ... Started by NClaborn	1 Replies 144 Views	Jul 24, 2018 by cascooper22
What is the normal maximum air velocity across the face of a low-efficiency panel filter? A) 100 ... Started by mwit1967	1 Replies 9 Views	Jul 24, 2018 by zacnyjessica
Smaller chillers typically use: A) Centrifugal or rotary compressors. B) Centrifugal or screw ... Started by Alainaaa8	3 Replies 27 Views	Jul 24, 2018 by bookworm410
Which of the following measures is the minimum steam pressure for a high-pressure boiler? A) 150 ... Started by natalie2426	1 Replies 72 Views	Jul 24, 2018 by tkempin
Which type of compressor chiller uses a pair of rotors to compress the refrigerant gas? A) ... Started by BrownTown3	1 Replies 12 Views	Jul 24, 2018 by reelove4eva
A typical residential split system air conditioner consists of an: A) Indoor condensing unit, an ... Started by Tirant22	1 Replies 30 Views	Jul 24, 2018 by fromAlphatoOmega22
How often should a renewable media, pleated surface be changed? A) Quarterly B) Once or twice a ... Started by Awilson837	3 Replies 49 Views	Jul 24, 2018 by nekcihc358
Larger-tonnage refrigerant units use which kinds of chillers? A) Reciprocating and screw ... Started by dejastew	1 Replies 31 Views	Jul 24, 2018 by 14vl19
What is latent heat gain? A) Heat gain that is not anticipated by the building designer B) Heat ... Started by CBme	1 Replies 75 Views	Jul 24, 2018 by lou
The heat in the combustion chamber is reflected and concentrated by the: A) Reflector. B) Heat ... Started by fox	1 Replies 35 Views	Jul 24, 2018 by potomatos
What is an opaque surface? A) A surface that light cannot pass through, such as walls B) A ... Started by vicotolentino	3 Replies 29 Views	Jul 24, 2018 by tuate
What is the advantage of the extended media surface area in pleated filters? A) Allows the filter ... Started by torybrooks	1 Replies 51 Views	Jul 24, 2018 by elyse44
How can the centrifugal compressor speed be higher than the motor speed? A) By using ... Started by stevenposner	1 Replies 23 Views	Jul 24, 2018 by Galvarado142
Infiltration calculations in Manual J8 are based on: A) Thermal imaging measurements. B) Taking ... Started by nautica902	1 Replies 14 Views	Jul 24, 2018 by medine