Skills and Trades

Replies / Views	Last post
________ light can be used inside a duct system to kill mold, fungus, bacteria, and other living ... Started by rl	3 Replies 55 Views	Jul 24, 2018 by jennafosdick
The largest-capacity chillers use: A) Rotary compressors. B) Centrifugal compressors. C) ... Started by lidoalex	1 Replies 26 Views	Jul 24, 2018 by amit
The minimum SEER rating for new air-conditioning systems is: A) 20 SEER. B) 13 SEER. C) 16 SEER. ... Started by go.lag	1 Replies 41 Views	Jul 24, 2018 by Ddddd
Which of these installation steps listed is normally performed first? A) Commissioning B) ... Started by beccaep	1 Replies 132 Views	Jul 24, 2018 by mjbamaung
What is the buffer tank on an air-to-water heat pump system? A) A tank in the suction line before ... Started by wrbasek0	3 Replies 120 Views	Jul 24, 2018 by fromAlphatoOmega22
What is sensible heat gain? A) Heat gain that falls within the parameters of the Department of ... Started by xroflmao	1 Replies 73 Views	Jul 24, 2018 by ngr69
An air contaminant that is most difficult to remove through common filtration methods is: A) ... Started by serike	1 Replies 146 Views	Jul 24, 2018 by matt95
The portion of a planned maintenance call in which worn parts are replaced, filters are changed, and ... Started by cartlidgeashley	1 Replies 33 Views	Jul 24, 2018 by wtf444
Which is the best location for an outdoor condensing unit? A) Under a bedroom window B) On the ... Started by audragclark	3 Replies 129 Views	Jul 24, 2018 by elyse44
Utilizing a filter at decreased airflow levels will ________ the efficiency and ________ the ... Started by tnt_battle	1 Replies 53 Views	Jul 24, 2018 by manuelcastillo
What type of chiller is capable of continuous (stepless) capacity control? A) Reciprocating ... Started by mp14	1 Replies 214 Views	Jul 24, 2018 by zenzy
What is the difference between heat loss and heat gain? A) Heat loss occurs in poorly insulated ... Started by 09madisonrousseau09	1 Replies 128 Views	Jul 24, 2018 by cloudre37
Modern residential oil furnaces sense the flames using: A) Ultraviolet light sensors. B) A ... Started by TFauchery	3 Replies 63 Views	Jul 24, 2018 by kiamars2010
Compared to centrifugal chillers, screw chillers generally: A) Are physically smaller for ... Started by bio_gurl	1 Replies 44 Views	Jul 24, 2018 by djofnc
The largest loads in commercial heat gain calculations include heat gain from: A) Lights, people, ... Started by Themember4	1 Replies 230 Views	Jul 24, 2018 by chereeb
What is the range of MERV ratings? A) High, medium, and low efficiency B) From 1 to 20, with 1 ... Started by SO00	1 Replies 53 Views	Jul 24, 2018 by tmlewis4706
Why do mini-split systems cost so much to install? A) The design is more complex than a normal ... Started by NClaborn	3 Replies 76 Views	Jul 24, 2018 by katara
How does scheduling maintenance save time and money? A) It allows you to safely run the system ... Started by wrbasek0	1 Replies 82 Views	Jul 24, 2018 by maya.nigrin17@yahoo.com
The ignition operating sequence and flame safety are controlled on an oil burner by: A) The ... Started by TFauchery	1 Replies 101 Views	Jul 24, 2018 by blfontai
The condensate line from the drain pan of the evaporator is normally: A) 3/4 in galvanized iron ... Started by schs14	1 Replies 56 Views	Jul 24, 2018 by Sweetkitty24130
Increasing the airflow across a filter: A) Decreases its efficiency. B) Increases its efficiency. ... Started by vHAUNG6011	3 Replies 105 Views	Jul 24, 2018 by Pariscourtney
How is a U factor calculated for a building panel built of several different materials? A) Add ... Started by xclash	1 Replies 19 Views	Jul 24, 2018 by britb2u
________ use DC voltage to attract dust and contaminants to an electrically charged media or plate. ... Started by cool	1 Replies 103 Views	Jul 24, 2018 by wfdfwc23
What is the purpose of a chiller economizer? A) To superheat the liquid refrigerant before it ... Started by jrubin	1 Replies 138 Views	Jul 24, 2018 by laurnthompson
How is the R value determined for a composite structure, such as a wall? A) The R value of the ... Started by maychende	3 Replies 87 Views	Jul 24, 2018 by jjorrostieta