Skills and Trades

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The correct shut off procedure for an oxyacetylene torch is: A) Close the acetylene first and ... Started by 123654777	1 Replies 33 Views	Jul 26, 2018 by Sammyo
Why are vertical suction risers often smaller than the horizontal runs on the same suction line? ... Started by j.rubin	1 Replies 80 Views	Jul 26, 2018 by brbarasa
What is the voltage drop across a 30 ohm resistor with a current draw of 5 amps? A) 30 ohms 5 ... Started by crobinson2013	1 Replies 69 Views	Jul 26, 2018 by fffftttt
The pressure drop due to vertical lift in a liquid line is approximately: A) 0. 5 psi per foot of ... Started by mia	3 Replies 36 Views	Jul 26, 2018 by stillxalice
Technicians should remember that AC power can be converted to DC power through use of components ... Started by waynest	1 Replies 18 Views	Jul 26, 2018 by yasmin
What is considered a long line application for residential air conditioning? A) Lines exceeding ... Started by Bernana	1 Replies 40 Views	Jul 26, 2018 by ultraflyy23
Which motor should be used for applications that require frequent starts without overheating the ... Started by saliriagwu	1 Replies 166 Views	Jul 26, 2018 by macybarnes
Battery powered devices operate on: A) Modulating current (MC). B) Direct current (DC). C) ... Started by robinn137	3 Replies 41 Views	Jul 26, 2018 by Jordin Calloway
What does a transformer do? A) Transforms AC current to DC current B) Changes an electrical ... Started by Alygatorr01285	1 Replies 33 Views	Jul 26, 2018 by carlsona147
Describe the construction of a capacitor: A) An anode and a cathode in an electrolyte. B) A ... Started by Bernana	1 Replies 57 Views	Jul 26, 2018 by AaaA
When should gauges be installed on small critically charged systems? A) Whenever the system is ... Started by michelleunicorn	1 Replies 11 Views	Jul 26, 2018 by matt
What is the normal pressure range for compound pressure gauges made for use on R-410a systems? A) ... Started by NguyenJ	3 Replies 49 Views	Jul 26, 2018 by janeli1
Single phase AC power is used: A) Only in residences. B) In both residential and commercial ... Started by shenderson6	1 Replies 40 Views	Jul 26, 2018 by vboyd24
What is the normal pressure range for high pressure gauges made for use on R-410A systems? A) 0 - ... Started by cabate	1 Replies 75 Views	Jul 26, 2018 by maya.nigrin17@yahoo.com
Three phase transformers are available in: A) Alpha and Wye configurations. B) Delta and Omega ... Started by tatyanajohnson	1 Replies 36 Views	Jul 26, 2018 by Zebsrer
When a manual service valve is back seated: A) Both the service port and the line are closed to ... Started by lilldybug07	3 Replies 44 Views	Jul 26, 2018 by TheDev123
A Delta three phase power supply provides: A) 240 volts between the legs. B) 120 volts between ... Started by RYAN BANYAN	1 Replies 64 Views	Jul 26, 2018 by deja
A De minimis release is: A) Less than 10 of the system charge. B) The minimum amount of ... Started by stock	1 Replies 14 Views	Jul 26, 2018 by ilianabrrr
Root mean square( RMS) is a mathematical formula for: A) Measuring the pressure drop across an ... Started by V@ndy87	1 Replies 20 Views	Jul 26, 2018 by raili21
Commercial refrigeration systems normally have: A) A suction service valve and a discharge ... Started by debasdf	3 Replies 41 Views	Jul 26, 2018 by gcook
Which is the primary purpose of a split-system installation valve's service port? A) Trapping ... Started by mckennatimberlake	1 Replies 26 Views	Jul 26, 2018 by DylanD1323
What category electric meter is intended only for measurement inside an appliance? A) Category ... Started by Ebrown	1 Replies 161 Views	Jul 26, 2018 by jesse.fleming
What should you look for on the meter besides a CAT rating? A) An EPA approval B) A DOE approval ... Started by kwoodring	1 Replies 1,459 Views	Jul 26, 2018 by qytan
Where does the current come from that moves the needle on an analog volt meter? A) The volt meter ... Started by bobbysung	3 Replies 61 Views	Jul 26, 2018 by nguyenhoanhat
What scales on digital meters require battery power to operate? A) Only milliamp scale B) Only ... Started by MirandaLo	1 Replies 33 Views	Jul 26, 2018 by kxciann