Skills and Trades

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When a split AC system using a capillary tube is overcharged: A) The compressor shell will get ... Started by penza	1 Replies 52 Views	Jul 24, 2018 by polinasid
What type of antifreeze solutions may be used in ground loops? A) Any antifreeze that will extend ... Started by justinmsk	1 Replies 88 Views	Jul 24, 2018 by Ahernandez18
Isolating the break in a circuit by starting at a point where there is correct voltage, and moving ... Started by Beheh	1 Replies 48 Views	Jul 24, 2018 by blakcmamba
What two manual resets do all oil burners have? A) The integrated furnace circuit breaker and the ... Started by silviawilliams41	3 Replies 35 Views	Jul 24, 2018 by tofugiraffe
When changing a low-voltage transformer, the service technician should: A) Use a replacement ... Started by panfilo	1 Replies 106 Views	Jul 24, 2018 by abro1885
One advantage that steam systems have over hot water systems is that steam systems do not require: ... Started by littleanan	1 Replies 84 Views	Jul 24, 2018 by Jody Vaughn
If the safety reset on an oil furnace primary control is tripped: A) Nothing on the furnace will ... Started by Alygatorr01285	1 Replies 60 Views	Jul 24, 2018 by bhavsar
A weeping relief valve on a hot water boiler may be an indication of: A) A water-logged expansion ... Started by JMatthes	3 Replies 80 Views	Jul 24, 2018 by Sammyo
Symptoms of an inefficient compressor include: A) High suction pressure, high discharge pressure, ... Started by CBme	1 Replies 63 Views	Jul 24, 2018 by vseab
How can the water flow through a geothermal system be determined? A) By using an clamp-on water ... Started by Metfan725	1 Replies 24 Views	Jul 24, 2018 by mk6555
Which areas of a large office building have the most constant cooling load? A) The south-facing ... Started by imanialler	1 Replies 30 Views	Jul 24, 2018 by BAOCHAU2803
Why do many building codes restrict the use of unvented gas-fired space heaters? A) They heat ... Started by ENagel	3 Replies 14 Views	Jul 24, 2018 by laurnthompson
Which of the following statements regarding the mechanical-draft cooling tower is correct? A) The ... Started by cartlidgeashley	1 Replies 15 Views	Jul 24, 2018 by wtf444
When searching for a break in a circuit by hopscotching, the technician checks: A) The wattage of ... Started by olgavictoria	1 Replies 20 Views	Jul 24, 2018 by Andromeda18
What is meant by the coil split? A) The temperature difference between the coil operating ... Started by student77	1 Replies 47 Views	Jul 24, 2018 by macmac
Induced-draft, forced-draft, counterflow, and crossflow cooling towers are all examples of: A) An ... Started by TFauchery	3 Replies 54 Views	Jul 24, 2018 by dlook33
What is the purpose of the low ambient control on a commercial air conditioner? A) To cycle the ... Started by Alygatorr01285	1 Replies 9 Views	Jul 24, 2018 by lkoler
A cooling tower in which air flow is produced by natural convection due to the density difference ... Started by theo	1 Replies 30 Views	Jul 24, 2018 by Loise Hard
What does hygroscopic mean? A) A material that is totally incompatible with water is hygroscopic. ... Started by danielfitts88	1 Replies 45 Views	Jul 24, 2018 by samiel-sayed
Where can a technician determine the correct water flow rate for a water-source system? A) Adjust ... Started by oliviahorn72	3 Replies 35 Views	Jul 24, 2018 by livaneabi
Which kind of cooling tower draws or pushes the air across the water, rather than up through it? ... Started by xclash	1 Replies 33 Views	Jul 24, 2018 by cloudre37
A problem that can look like low refrigerant charge if a service technician is only looking at ... Started by genevieve1028	1 Replies 26 Views	Jul 24, 2018 by JaynaD87
What is the type of gas that is created as a byproduct of other manufacturing processes? A) ... Started by tiffannnnyyyyyy	1 Replies 18 Views	Jul 24, 2018 by kkenney
What does the pressure drop across the coaxial coil tell the technician? A) The water flow ... Started by Diane	3 Replies 30 Views	Jul 24, 2018 by miss.ashley
A catalytic space heater differs from other types of gas space heaters in that a catalytic space ... Started by ericka1	1 Replies 105 Views	Jul 24, 2018 by Cnarkel