Skills and Trades

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Indicates liquid level in receiver C) liquid level sensor What will be an ideal ... Started by Deast7027	1 Replies 96 Views	Jul 24, 2018 by cswans24
Why must condensate pumps used with condensing furnaces be approved for furnace condensate use? ... Started by pepyto	1 Replies 40 Views	Jul 24, 2018 by mmpiza
If the drain for a 90 percent efficient furnace and the drain for the air conditioning coil are run ... Started by jman1234	3 Replies 49 Views	Jul 24, 2018 by tashiedavis420
What type of vent is used with 90 percent Category IV furnaces? A) Single-wall stainless steel ... Started by kshipps	1 Replies 53 Views	Jul 24, 2018 by Ddddd
What is the difference between a viscous impingement filter and a standard filter? A) Viscous ... Started by melina_rosy	1 Replies 61 Views	Jul 24, 2018 by isabelt_18
The steam grid humidifier works by: A) Boiling water in a pan to steam. B) Passing air over a ... Started by mrsjacobs44	1 Replies 115 Views	Jul 24, 2018 by meltdown117
What is an uneven rack system? A) A rack that is not properly balanced B) A rack that has ... Started by lunatika	3 Replies 155 Views	Jul 24, 2018 by enass
Poorly maintained humidifiers can become indoor air quality concerns because of: A) Mold and ... Started by Sufayan.ah	1 Replies 34 Views	Jul 24, 2018 by sultansheikh
A hot-gas defrost cycle will progress in the same manner as the: A) Natural defrost system. B) ... Started by tnt_battle	1 Replies 129 Views	Jul 24, 2018 by reversalruiz
How did serpentine heat exchangers compare to older heat exchangers? A) The serpentine heat ... Started by penguins	1 Replies 38 Views	Jul 24, 2018 by joewallace
Types of humidifiers used with commercial air-handling equipment include: A) Bypass, atomizing, ... Started by karateprodigy	3 Replies 73 Views	Jul 24, 2018 by smrtceo
When low-voltage thermostat wire is run through the roof to the conditioned space, the thermostat ... Started by MirandaLo	1 Replies 77 Views	Jul 24, 2018 by joshbk44
How does air from air-conditioning vents affect open display cases? A) Open display cases are not ... Started by rmenurse	1 Replies 84 Views	Jul 24, 2018 by FergA
The electrical disconnect box for a rooftop unit is: A) Mounted on the unit. B) Mounted on a ... Started by amal	1 Replies 60 Views	Jul 24, 2018 by janieazgirl
Codes relating to rooftop installation include: A) OSHA, DOE, and EPA. B) NIST, UL, and CSA. C) ... Started by sarasara	3 Replies 20 Views	Jul 24, 2018 by pami445
Open display cases are designed: A) To pull down warm products to refrigerated temperatures. B) ... Started by armygirl	1 Replies 22 Views	Jul 24, 2018 by hramirez205
When installing units requiring three-phase power, the voltages between any two power leads must be: ... Started by urbanoutfitters	1 Replies 26 Views	Jul 24, 2018 by ilianabrrr
One unique problem with rooftop units installed in a seacoast area is that: A) Salt spray ... Started by imowrer	1 Replies 22 Views	Jul 24, 2018 by janeli
How can improperly loading an open display case adversely affect its operation? A) It can block ... Started by sammy	3 Replies 121 Views	Jul 24, 2018 by kmb352
How is a smoke candle used when troubleshooting an open display case? A) It helps technicians ... Started by burchfield96	1 Replies 104 Views	Jul 24, 2018 by robbielu01
Installation clearances for rooftop units are required: A) To isolate the equipment from ... Started by olgavictoria	1 Replies 39 Views	Jul 24, 2018 by maaaaaaaaaa
The location for a rooftop unit will be partly determined by: A) The distance that a crane can ... Started by tsand2	1 Replies 7 Views	Jul 24, 2018 by trog
The different types of atmospheric gas burners include: A) Primary, secondary, condensing, and ... Started by sam.t96	3 Replies 81 Views	Jul 24, 2018 by joshraies
A precisely drilled hole that controls the amount of gas entering a burner is called: A) A gas ... Started by joblessjake	1 Replies 30 Views	Jul 24, 2018 by javimendoza7
Started by armygirl	1 Replies 16 Views	Jul 24, 2018 by zogaridan