Skills and Trades

Replies / Views	Last post
Electricity is the flow of: A) Atoms. B) Protons. C) Electrons. D) ... Started by oliviahorn72	1 Replies 35 Views	Jul 24, 2018 by ghepp
Molecules are composed of: A) Neutrons and protons. B) Electrons and protons. C) Atoms. D) ... Started by Bob-Dole	1 Replies 142 Views	Jul 24, 2018 by k.lashomb
How much mechanical work is required to lift a 300-lb compressor 3 ft? A) 300 lb 3 ft = 900 ... Started by acc299	3 Replies 28 Views	Jul 24, 2018 by tuate
If molecules in substance A are moving at a higher rate than the molecules in substance B,which ... Started by jeatrice	1 Replies 92 Views	Jul 24, 2018 by Liddy
Why is electricity distributed using extremely high voltages? A) To keep current as low as ... Started by lak	1 Replies 31 Views	Jul 24, 2018 by britb2u
Convert -100 Fahrenheit to Rankine. A) -100 - 460 = -560R B) -100 + 273 = 173R C) -100 + 460 = ... Started by c0205847	1 Replies 26 Views	Jul 24, 2018 by AmberC1996
What is the pressure in psi required to lift water 20 feet? A) 14.7 psijust enough to overcome ... Started by Destiiny22	3 Replies 105 Views	Jul 24, 2018 by flexer1n1
What is the pressure at the bottom of a water tank that has a cross section of 10 ft2 and is filled ... Started by ereecah	1 Replies 48 Views	Jul 24, 2018 by patma1981
An HVACR technician takes a reading of 25 in Hg. Which type of gauge is he using? A) It is ... Started by lindiwe	1 Replies 33 Views	Jul 24, 2018 by Athena23
After heating a fixed volume of gas at 50 psia from 300 R to 600R, its pressure will be: A) 25 ... Started by tatyanajohnson	1 Replies 81 Views	Jul 24, 2018 by kmb352
An oil slinger is used with reciprocating compressors that are lubricated by: A) Splash ... Started by s.tung	3 Replies 23 Views	Jul 24, 2018 by LVPMS
The saturation temperature of the refrigerant in the system can be read on the refrigeration gauges: ... Started by itsmyluck	1 Replies 46 Views	Jul 24, 2018 by s.meritte
What is the maximum reading on a typical R-410a high-pressure gauge? A) 800 psig B) 120 psig C) ... Started by Cooldude101	1 Replies 48 Views	Jul 24, 2018 by amit
For which of the following actions is the last part of the evaporator used? A) Raising the liquid ... Started by ETearle	1 Replies 68 Views	Jul 24, 2018 by kardosa007
What color surface temperature can be read most accurately with an infrared thermometer? A) ... Started by tth	3 Replies 19 Views	Jul 24, 2018 by Danny Ewald
Direct-expansion coils operating below the dew point of the entering airstream will: A) Warm the ... Started by CharlieWard	1 Replies 32 Views	Jul 24, 2018 by allisonblackmore
The smallest incremental markings on analog gauges designed for R-410A are generally: A) 10 psi. ... Started by OSWALD	1 Replies 62 Views	Jul 24, 2018 by adammoses97
Latent cooling: A) Reduces the air temperature and removes water. B) Reduces the air ... Started by deesands	1 Replies 110 Views	Jul 24, 2018 by jennafosdick
Compared to analog thermometers, digital thermometers generally sense temperature changes: A) ... Started by ishan	3 Replies 160 Views	Jul 24, 2018 by heinisk01
If a technician needs to take temperatures in both Fahrenheit and Celsius using a digital ... Started by mmm	1 Replies 55 Views	Jul 24, 2018 by Jadwiga9
In the compression refrigeration cycle, the refrigerant is superheated: A) Leaving the ... Started by Zoey63294	1 Replies 54 Views	Jul 24, 2018 by LP
Refrigerant enters a direct expansion evaporator as a saturated mixture and leaves as a: A) Warm ... Started by strangeaffliction	1 Replies 45 Views	Jul 24, 2018 by Koolkid240
How can a thermocouple tip be used to get an accurate line temperature measurement? A) The ... Started by segrsyd	3 Replies 56 Views	Jul 24, 2018 by tranoy
In the compression refrigeration cycle, the refrigerant is saturated: A) In the evaporator and ... Started by Bernana	1 Replies 51 Views	Jul 24, 2018 by nanny
What is the purpose of epoxy coating on evaporator coils? A) To improve airflow efficiency B) To ... Started by asmith134	1 Replies 50 Views	Jul 24, 2018 by peilian