Skills and Trades

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Oil accumulation in the evaporator: A) Can lead to leaks because refrigerant oil is corrosive to ... Started by bio_gurl	1 Replies 70 Views	Jul 24, 2018 by yotaSR5
On a typical plot of the refrigeration cycle, where does liquid refrigerant first begin forming in ... Started by fahad	1 Replies 49 Views	Jul 24, 2018 by paavo
What is subcooling? A) Lowering liquid refrigerant temperature below its saturation temperature ... Started by plus1	3 Replies 74 Views	Jul 24, 2018 by Anna
Where in the cycle does heat enter the refrigerant? A) In the evaporator and compressor B) In the ... Started by fahad	1 Replies 38 Views	Jul 24, 2018 by FergA
The pressure drop for R-22 due to vertical lift ina liquid line is approximately: A) 0.2 psi per ... Started by james0929	1 Replies 46 Views	Jul 24, 2018 by juiceman1987
A TEV with a dead power element will operate: A) With a low superheat. B) Correctly until an ... Started by itsmyluck	1 Replies 268 Views	Jul 24, 2018 by miss.ashley
An isothermal process is a process that does not change: A) The state of the refrigerant. B) The ... Started by tsand2	3 Replies 47 Views	Jul 24, 2018 by Sophiapenny
What is an oil lift? A) An oil lift helps return oil up a vertical riser using an integral ... Started by colton	1 Replies 38 Views	Jul 24, 2018 by Smiles0805
A system with a loose TEV sensing bulb would most likely: A) Have a lower-than-normal evaporator ... Started by chandani	1 Replies 84 Views	Jul 24, 2018 by Jordin Calloway
A restricted inlet screen on a TEV can cause: A) High suction pressure, low superheat, and low ... Started by jrubin	1 Replies 68 Views	Jul 24, 2018 by phuda
Vertical lines going from top to bottom are referred to as which of the following? A) Constant ... Started by Jkov05	3 Replies 23 Views	Jul 24, 2018 by dpost18
An R-22 system has a 28-ft lift and a 7 psi pressure drop in the liquid line due to vertical lift. ... Started by maychende	1 Replies 116 Views	Jul 24, 2018 by Shshxj
Refrigerant characteristics shown on a pressure-enthalpy diagram include: A) Molecular weight, ... Started by jilianpiloj	1 Replies 87 Views	Jul 24, 2018 by Ptupou85
The pressure lines on the PH diagram: A) Run diagonally from right to left. B) Run diagonally ... Started by mrsjacobs44	3 Replies 28 Views	Jul 24, 2018 by milbourne11
Which of the following modifications would alleviate the stress on a compressor in a long-line ... Started by abarnes	1 Replies 33 Views	Jul 24, 2018 by elizabethrperez
The specific enthalpy lines: A) Run vertically from top to bottom. B) Run diagonally from left to ... Started by washai	1 Replies 38 Views	Jul 24, 2018 by enass
Modifications such as adding a liquid-line solenoid at the outdoor unit, using a hard shutoff ... Started by cookcarl	1 Replies 15 Views	Jul 24, 2018 by scikid
What happens to the temperature of the refrigerant as you move to the right or left along a constant ... Started by naturalchemist	3 Replies 12 Views	Jul 24, 2018 by fwbard
What happens to the pressure as you move up or down along a constant enthalpy line? A) The ... Started by clippers!	1 Replies 29 Views	Jul 24, 2018 by ryansturges
How is entropy defined in refrigeration? A) Entropy is the ratio of absolute pressure to absolute ... Started by burchfield96	1 Replies 57 Views	Jul 24, 2018 by mammy1697
Which of the following is the line that drops straight down because no heat is gained or lost? A) ... Started by j.rubin	1 Replies 27 Views	Jul 24, 2018 by taylorsonier
How is placement of the condenser line determined when drawing a PH diagram of an operating system? ... Started by krzymel	3 Replies 39 Views	Jul 24, 2018 by fdliggud
How do the three position service valves differ from other valves? A) They have no closed ... Started by vHAUNG6011	1 Replies 51 Views	Jul 24, 2018 by peilian
When drawing a PH diagram of an operating system, how is placement of the metering device line ... Started by bobthebuilder	1 Replies 39 Views	Jul 24, 2018 by ally
What controls when Schrader valves open and close? A) They open when hoses with depressors are ... Started by student77	1 Replies 161 Views	Jul 24, 2018 by dyrone