Skills and Trades

Replies / Views	Last post
A fire is burning in the fireplace and venting correctly. The furnace comes on and smoke starts to ... Started by Capo	1 Replies 83 Views	Jul 26, 2018 by rachel
Ventilation systems can be grouped by their affect on building pressure as A) contributing, ... Started by big1devin	3 Replies 31 Views	Jul 26, 2018 by ecabral0
A balanced ventilation system A) supplies and exhausts the same amount of air into the building ... Started by jho37	1 Replies 18 Views	Jul 26, 2018 by dlook33
You are computing proper ventilation for a house with 1500 square feet of floor space, 8 foot ... Started by amal	1 Replies 36 Views	Jul 26, 2018 by BAOCHAU2803
When should you approach the customer about the potential cost of a required part? A) Just before ... Started by Collmarie	1 Replies 16 Views	Jul 26, 2018 by batool
The air leaving an air conditioner is typically A) a low relative humidity with more water in the ... Started by crazycityslicker	3 Replies 13 Views	Jul 26, 2018 by shailee
A refrigeration cycle dehumidifier is similar to A) a window unit with a single airflow over both ... Started by nenivikky	1 Replies 16 Views	Jul 26, 2018 by Carliemb17
Select the characteristics of a whole house dehumidifier A) can provide high efficiency air ... Started by evelyn o bentley	1 Replies 21 Views	Jul 26, 2018 by kmb352
The top of an extension ladder: A) At least 12 inches above the point where it rests on the ... Started by asd123	1 Replies 37 Views	Jul 26, 2018 by cassie_ragen
How is size of an extinguisher related to its ability to put out a fire? A) The fewer combustible ... Started by Caiter2013	3 Replies 34 Views	Jul 26, 2018 by SVictor
Select safe shop practices. You may select more than one. A) Wipe up liquid spills at the end of ... Started by vicky	1 Replies 33 Views	Jul 26, 2018 by vboyd24
In general, how does condenser size affect a system's SEER? A) A smaller condenser has a higher ... Started by craiczarry	1 Replies 62 Views	Jul 26, 2018 by yahahah24021
PTAC and window unit air conditioners often use rotary compressors, which are effective but ... Started by ETearle	1 Replies 61 Views	Jul 26, 2018 by vish98
Window air conditioning units normally have two operating modes A) Heating and cooling B) Fan ... Started by Kikoku	3 Replies 87 Views	Jul 26, 2018 by makaylafy
The maximum vertical lift for the liquid line in a residential system is typically A) 80 feet B) ... Started by RODY.ELKHALIL	1 Replies 41 Views	Jul 26, 2018 by Benayers
The static pressure drop across a wet evaporator coil is A) up to 0.10 inches of water column ... Started by casperchen82	1 Replies 70 Views	Jul 26, 2018 by fauacakatahaias
Typical condenser fan motor speeds are about A) 500 rpm or 800 rpm B) 800 rpm or 1000 rpm C) ... Started by Frost2351	1 Replies 30 Views	Jul 26, 2018 by emilymalinowski12
The pressure loss in the liquid line of a split system A) Is greater when the condenser is above ... Started by mmm	3 Replies 38 Views	Jul 26, 2018 by meltdown117
The advantage of using an evaporator coil that is an AHRI match for the condensing unit is that ... Started by mckennatimberlake	1 Replies 20 Views	Jul 26, 2018 by TDubDCFL
When an evaporator coil is installed on a furnace, it is placed A) In a separate plenum that is ... Started by swpotter12	1 Replies 24 Views	Jul 26, 2018 by juwms
As the air filter gets dirty, the static pressure drop across the filter A) stays the same B) ... Started by jenna1	1 Replies 24 Views	Jul 26, 2018 by paavo
Types of pressure vessels commonly used in HVACR include (you may select more than one): A) ... Started by Alygatorr01285	3 Replies 28 Views	Jul 26, 2018 by xthemafja
The main types of over current protection used for a condensing unit are A) Magnetic overload ... Started by SGallaher96	1 Replies 18 Views	Jul 26, 2018 by zenzy
De-burring tools are used for: A) Preparing a compressor head before applying a head gasket. B) ... Started by tsand2	1 Replies 45 Views	Jul 26, 2018 by InfiniteSteez
Two common methods for measuring airflow in residential systems are A) Velocity pressure ... Started by a0266361136	1 Replies 31 Views	Jul 26, 2018 by bdobbins