Skills and Trades

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How does a reciprocating compressor operate? A) In a reciprocating compressor, the piston is ... Started by Garrulous	1 Replies 50 Views	Jul 24, 2018 by janieazgirl
All refrigeration compressors are designed to pump: A) Only vapor. B) Only liquid. C) Mostly ... Started by imowrer	1 Replies 14 Views	Jul 24, 2018 by efwsefaw
The function of the compressor in the refrigeration cycle is to: A) Lower the pressure and ... Started by joe	1 Replies 46 Views	Jul 24, 2018 by morrie123456
What specification designates a gauge with an accuracy of 3 for the first third of the scale, 2 for ... Started by jlmhmf	3 Replies 42 Views	Jul 24, 2018 by blazinlyss
An advantage of open-drive compressors is that: A) They are smaller and more compact than ... Started by future617RT	1 Replies 17 Views	Jul 24, 2018 by Alyson.hiatt@yahoo.com
What color hose connects to the low side of the system, allowing the compound gauge to read the ... Started by nevelica	1 Replies 45 Views	Jul 24, 2018 by AISCAMPING
The space left between the piston and the valve plate of a reciprocating compressor when the piston ... Started by kaid0807	1 Replies 130 Views	Jul 24, 2018 by smrtceo
How does a hot-gas defrost system work? A) Gas flames provide the heat to melt the ice. B) A ... Started by tuffie	3 Replies 28 Views	Jul 24, 2018 by vkodali
What controls the length of the defrost cycle on most commercial refrigeration systems? A) The ... Started by biggirl4568	1 Replies 31 Views	Jul 24, 2018 by Hikerman221
How does an air-defrost system work? A) Air from inside the store is directed over the ... Started by panfilo	1 Replies 20 Views	Jul 24, 2018 by cloudre37
What is the lowest percentage of full capacity that a digital scroll can be safely operated for ... Started by ghost!	1 Replies 43 Views	Jul 24, 2018 by ecox1012
On a commercial refrigeration system with hot-gas defrost, what does the compressor do during the ... Started by fasfsadfdsfa	3 Replies 57 Views	Jul 24, 2018 by yuyiding
Positive shutoff fittings allow technicians to reduce the amount of which of the following? A) ... Started by jasdeep_brar	1 Replies 37 Views	Jul 24, 2018 by isabelt_18
A tool used for checking system pressures, evacuating systems, recovering systems, and charging ... Started by xroflmao	1 Replies 71 Views	Jul 24, 2018 by frre432
What happens to the evaporator fan motor when the defrost cycle is terminated? A) The fan shuts ... Started by mia	1 Replies 79 Views	Jul 24, 2018 by cegalasso
When do positive shutoff fittings reduce refrigerant loss? A) Only when connecting hoses B) When ... Started by lunatika	3 Replies 79 Views	Jul 24, 2018 by Dinolord
Rotary compressors are commonly used in: A) Large central split systems. B) Chillers. C) Window ... Started by j.rubin	1 Replies 28 Views	Jul 24, 2018 by pikon
One technique for improving efficiency and comfort through compressor selection is to select a: ... Started by justinmsk	1 Replies 34 Views	Jul 24, 2018 by morganmarie791
How can a technician verify that a condenser and evaporator are an AHRI match? A) Ask the ... Started by ereecah	1 Replies 17 Views	Jul 24, 2018 by ndhahbi
Assuming they both have the same condenser temperature, which application requires more horsepower ... Started by Pineappleeh	3 Replies 16 Views	Jul 24, 2018 by Bsand8
Why is a large refrigerant leak potentially dangerous? A) Most common refrigerants used in ... Started by pane00	1 Replies 25 Views	Jul 24, 2018 by anoriega3
What type of detector uses ultrasonic waves to detect changes in the density of the fluid traveling ... Started by meagbuch	1 Replies 79 Views	Jul 24, 2018 by joanwhite
Compressor cylinder unloading reduces the capacity of a reciprocating compressor by: A) Making ... Started by K@	1 Replies 46 Views	Jul 24, 2018 by TheDev123
The purpose of the condenser in a refrigeration system is to: A) Reject heat from the ... Started by abc	3 Replies 27 Views	Jul 24, 2018 by sylvia
A general definition of refrigerant is: A) A fluid that is naturally cold. B) A ... Started by arivle123	1 Replies 15 Views	Jul 24, 2018 by Amiracle