Skills and Trades

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Compared to reciprocating compressors, centrifugal compressors A) Can move a larger volume of ... Started by saraeharris	3 Replies 53 Views	Jul 26, 2018 by dlook33
Packaged chillers with air cooled condensers usually use A) hydrostatic chillers B) flooded ... Started by crazycityslicker	1 Replies 49 Views	Jul 26, 2018 by TheDev123
Technicians should be cautious when taking an oil sample from a semi-hermetic compressor because: ... Started by casperchen82	1 Replies 74 Views	Jul 26, 2018 by kingfahad97
When changing a low voltage transformer, service technician should: A) Use a replacement ... Started by anshika	1 Replies 116 Views	Jul 26, 2018 by ASDFGJLO
During the vapor recovery phase what is pumped from the condenser to the storage tank? A) cooling ... Started by burton19126	3 Replies 46 Views	Jul 26, 2018 by ryhom
As the load on an electric motor increases, its amp draw will: A) Stay the same because the motor ... Started by tatyanajohnson	1 Replies 39 Views	Jul 26, 2018 by durant1234
Oil is removed from the refrigerant vapor by a A) mist eliminator in the heater. B) valve in the ... Started by misspop	1 Replies 35 Views	Jul 26, 2018 by FergA
How often should the water handling components of an ice machine be cleaned? A) Monthly B) ... Started by burchfield96	1 Replies 44 Views	Jul 26, 2018 by AISCAMPING
Absorption chillers move refrigerant using A) heat from steam, hot water, or gas B) reciprocating ... Started by Zoey63294	3 Replies 73 Views	Jul 26, 2018 by leannegxo
How will an extremely dirty air filter affect the amp draw of a PSC centrifugal blower motor? A) ... Started by lak	1 Replies 62 Views	Jul 26, 2018 by rleezy04
Compared to air heating systems, hydronic heating systems A) Automatically add humidity as well ... Started by Sportsfan2111	1 Replies 98 Views	Jul 26, 2018 by bbburns21
Most hot water boilers heat the water up to temperatures A) of 100F to 150F B) of 200F to 250F C) ... Started by brutforce	1 Replies 57 Views	Jul 26, 2018 by Sweetkitty24130
What breaks down to form poisonous gas in the presence of flames? A) A1 refrigerant only B) ... Started by Hungry!	3 Replies 139 Views	Jul 26, 2018 by kingdude89
After flushing the lines and coils, the flush should be purged out: A) With nitrogen. B) With ... Started by londonang	1 Replies 90 Views	Jul 26, 2018 by vickybb89
A system with an inefficient compressor will operate with: A) A high suction pressure and a high ... Started by pepyto	1 Replies 134 Views	Jul 26, 2018 by Perkypinki
What materials are boilers commonly made from? A) Most boilers are either cast iron or brass B) ... Started by lak	1 Replies 43 Views	Jul 26, 2018 by kthug
What is the maximum water temperature for a low pressure water boiler? A) 150 F B) 200F C) 180F ... Started by cartlidgeashley	3 Replies 60 Views	Jul 26, 2018 by voltaire123
A system that is overcharged will operate with: A) A high subcooling and a high superheat. B) A ... Started by waynest	1 Replies 96 Views	Jul 26, 2018 by bpool94
When trying to diagnose an open pressure switch, which manufacturer-supplied reference will probably ... Started by cnetterville	1 Replies 72 Views	Jul 26, 2018 by Tabitha_2016
A water source heat pump that trips the high pressure switch during the cooling cycle and the low ... Started by saraeharris	1 Replies 143 Views	Jul 26, 2018 by blazinlyss
Name four types of solar energy systems. What will be an ideal ... Started by xclash	3 Replies 203 Views	Jul 26, 2018 by vboyd24
Explain how a photovoltaic cell converts solar energy into voltage and current. What will be an ... Started by Evvie72	1 Replies 43 Views	Jul 26, 2018 by shayla
In 2006 the total supply of electricity from all three sectors of the grid was ___________ a. ... Started by tsand2	1 Replies 19 Views	Jul 26, 2018 by SeanoH09
The demand for electrical consumption for United States for 2009 was ___________ a. 3.79 billion ... Started by justinmsk	1 Replies 24 Views	Jul 26, 2018 by meryzewe
Explain the differences among a photovoltaic cell, a photovoltaic panel, a photovoltaic module, and ... Started by melina_rosy	3 Replies 94 Views	Jul 26, 2018 by cuttiesgirl16