Skills and Trades

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A document issued by the site manager that allows a welder to perform operations where there is a ... Started by yoooooman	1 Replies 106 Views	Jul 24, 2018 by af
When an aluminum filler rod is heated, _____. a. the oxidation process stops b. the oxidation ... Started by abc	1 Replies 48 Views	Jul 24, 2018 by strudel15
The minimum slope on which composition shingles may be used if a double-lap underlayment is applied ... Started by michelleunicorn	1 Replies 25 Views	Jul 24, 2018 by aloop
Concrete normally attains its design strength in about ___ a. 14 days b. 21 days c. 28 days d. ... Started by Anajune7	3 Replies 25 Views	Jul 24, 2018 by Gabe
Bundles of shingles and other roofing materials should be placed _____. a. close to the edge of ... Started by fnuegbu	1 Replies 47 Views	Jul 24, 2018 by SAUXC
The correct order of application for a roof installation at an eave is _____. a. underlayment, ... Started by biggirl4568	1 Replies 12 Views	Jul 24, 2018 by jgranad15
The welding torch is held in place for a short time after a weld bead is terminated to allow _____. ... Started by stevenposner	1 Replies 15 Views	Jul 24, 2018 by tennis14576
Copper granules are bonded to the surface of some architectural shingles to provide _____. a. ... Started by Mr3Hunna	3 Replies 24 Views	Jul 24, 2018 by leannegxo
The signal given by extending both arms and moving them rapidly back and forth horizontally is ... Started by Cooldude101	1 Replies 30 Views	Jul 24, 2018 by nickk12214
A competent signal person must be stationed at all times whenever a crane is _____. a. ... Started by rlane42	1 Replies 67 Views	Jul 24, 2018 by Ksanderson1296
If a malfunction occurs during operations, the first thing the operator should do is _____. a. ... Started by TVarnum	1 Replies 52 Views	Jul 24, 2018 by Anton
When lifting loose materials such as pipe or bar stock, use a _____. a. chain and hook b. ... Started by LCritchfi	3 Replies 37 Views	Jul 24, 2018 by ambernicolefink
When a mobile crane is being moved without direction from the rigger, three travel signals from the ... Started by audie	1 Replies 88 Views	Jul 24, 2018 by Anonymous
A load of pipe is most commonly lifted using _____. a. lifting beams b. hoist ropes wrapped ... Started by drink	1 Replies 24 Views	Jul 24, 2018 by akemokai
Which substance in refrigerants is most responsible for atmospheric ozone depletion? a. Chlorine ... Started by ENagel	1 Replies 52 Views	Jul 24, 2018 by reversalruiz
What must be done when charging a zeotropic refrigerant into an operating system? a. Charging by ... Started by danielfitts88	3 Replies 157 Views	Jul 24, 2018 by javimendoza7
What wheel media is used in a rotary air-to-air heat exchanger that can recover total heat? a. ... Started by mydiamond	1 Replies 22 Views	Jul 24, 2018 by britb2u
When checking the refrigerant charge for an operating system with a fixed metering device, the focus ... Started by Davideckstein7	1 Replies 145 Views	Jul 24, 2018 by meganmoser117
On a system with a fixed metering device, an excessive amount of oil in the system can cause _____. ... Started by Collmarie	1 Replies 49 Views	Jul 24, 2018 by k.lashomb
On a system with normal to high subcooling at the condenser, and little or no subcooling at the ... Started by cabate	3 Replies 86 Views	Jul 24, 2018 by jojobee318
Compressor overheating can occur as the result of _____. a. a high compression ratio b. a low ... Started by mckennatimberlake	1 Replies 26 Views	Jul 24, 2018 by micaelaswann
The three types of airflow in a fixed-plate heat exchanger are _____. a. cross-flow, direct flow, ... Started by Mimi	1 Replies 29 Views	Jul 24, 2018 by Hdosisshsbshs
When used in a dehumidification application, the purpose of a heat pipe heat exchanger includes ... Started by washai	1 Replies 16 Views	Jul 24, 2018 by mbcrismon
A passive heat exchange system that relies on convection to move liquid is a(n) _____. a. ERV b. ... Started by lidoalex	3 Replies 18 Views	Jul 24, 2018 by Tonny
A flue-gas heat recovery system's stack heat exchanger that offers too much resistance to the flow ... Started by kshipps	1 Replies 49 Views	Jul 24, 2018 by Laurenleakan