Skills and Trades

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What does an evaporator pressure regulator do? A) It will not allow the evaporator pressure to ... Started by cool	1 Replies 113 Views	Jul 24, 2018 by Harbringer
In an air conditioner with a fixed metering device, a decrease in the outdoor ambient causes: A) ... Started by tingc95	1 Replies 39 Views	Jul 24, 2018 by duy1981999
What types of systems use evaporator pressure regulators (EPR)? A) Systems with multiple ... Started by NguyenJ	1 Replies 56 Views	Jul 24, 2018 by chem1s3
How do you know when to stop applying solder? A) The solder will draw all the way around the ... Started by WhattoUnderstand	3 Replies 148 Views	Jul 24, 2018 by nyrave
One operating advantage of fixed-restriction metering devices over expansion valves is: A) Can be ... Started by kaid0807	1 Replies 38 Views	Jul 24, 2018 by hollysheppard095
Why might closing the oxygen cylinder, then the acetylene cylinder, then bleeding first the oxygen ... Started by kwoodring	1 Replies 138 Views	Jul 24, 2018 by amcvicar
A suction-to-liquid line heat exchanger: A) Decreases the superheat while increasing the ... Started by geodog55	1 Replies 177 Views	Jul 24, 2018 by courtney_bruh
When brazing on a refrigeration line with an attached service valve: A) The valve should be cut ... Started by TFauchery	3 Replies 70 Views	Jul 24, 2018 by C.mcnichol98
What procedure is used when heating a brazed copper joint? A) Heat the fitting first and then ... Started by RODY.ELKHALIL	1 Replies 16 Views	Jul 24, 2018 by coyin
Which of the following is the standard saturated temperature drop in the suction line? A) 12F B) ... Started by Medesa	1 Replies 61 Views	Jul 24, 2018 by mceravolo
What is the advantage of using a pressure relief valve to protect a receiver instead of a fusible ... Started by craiczarry	1 Replies 81 Views	Jul 24, 2018 by diana chang
The correct lighting procedure for an oxyacetylene torch is: A) Crack both the acetylene and ... Started by go.lag	3 Replies 166 Views	Jul 24, 2018 by shoemake
Which of the following statements concerning nitrogen purging is TRUE? A) You should always purge ... Started by lunatika	1 Replies 65 Views	Jul 24, 2018 by ambernicolefink
To increase superheat on a thermostatic expansion valve, the adjusting stem should be: A) Turned ... Started by B	1 Replies 26 Views	Jul 24, 2018 by johnpizzaz
Where is the suction line temperature read when adjusting a TEV? A) As close as possible to the ... Started by imanialler	1 Replies 30 Views	Jul 24, 2018 by Mholman93
Refrigerant piping must be able to adequately carry both refrigerant and: A) Air. B) Electricity. ... Started by go.lag	3 Replies 122 Views	Jul 24, 2018 by jlaineee
Why are liquid-line filter driers required for all systems using HFC refrigerant? A) Because the ... Started by neverstopbelieb	1 Replies 36 Views	Jul 24, 2018 by bitingbit
The maximum pressure drop for a suction line should not exceed: A) 3 psi. B) 1 psi. C) 2 psi. ... Started by audie	1 Replies 42 Views	Jul 24, 2018 by dlook33
An R-22 refrigeration system requires a superheat of 8F. If the evaporator saturation pressure is 43 ... Started by khang	1 Replies 29 Views	Jul 24, 2018 by pallen55
What are the most common desiccant materials used in driers? A) Activated carbon and alcohol B) ... Started by biggirl4568	3 Replies 23 Views	Jul 24, 2018 by abctaiwan
Undersized suction lines: A) Can reduce system efficiency because of a high pressure drop. B) ... Started by penguins	1 Replies 52 Views	Jul 24, 2018 by mcni194
The refrigerant line whose sizing has the most effect on the compressor's compression ratio is the: ... Started by cmoore54	1 Replies 49 Views	Jul 24, 2018 by cswans24
When the refrigerant passes through the metering device, some of it starts to flash from a liquid to ... Started by wenmo	1 Replies 41 Views	Jul 24, 2018 by cclemon1
All of the liquid refrigerant has vaporized by: A) The beginning of the condenser. B) The ... Started by storky111	3 Replies 36 Views	Jul 24, 2018 by Pswine
As the refrigerant temperature drops during the desuperheating phase of the refrigeration cycle, the ... Started by cagreen833	1 Replies 36 Views	Jul 24, 2018 by Jmfn03