Skills and Trades

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The primary method of varying the speed on a DC shunt motor is to adjust the voltage and current on ... Started by fasfsadfdsfa	1 Replies 123 Views	Jul 24, 2018 by bhavsar
Which of the following is located on a motors nameplate? a. Synchronous speed b. Lifting ... Started by sdfghj	3 Replies 38 Views	Jul 24, 2018 by kingfahad97
A wound rotor motor has been recently put back into service but is now rotating in the wrong ... Started by jrubin	1 Replies 110 Views	Jul 24, 2018 by pallen55
The most common service factor appearing on a motors nameplate is _____. a. 1.15 b. 1.5 c. 2 ... Started by joblessjake	1 Replies 64 Views	Jul 24, 2018 by sokh
Which of the following is a true statement regarding fabric duct systems? a. The material cost of ... Started by acc299	1 Replies 47 Views	Jul 24, 2018 by millet
Fabric duct and fittings are typically attached to each other using _____. a. tapes that meet UL ... Started by Engineer	3 Replies 133 Views	Jul 24, 2018 by iman
The type of heat that makes steam an efficient carrier of energy is _____. a. latent heat b. ... Started by cabate	1 Replies 39 Views	Jul 24, 2018 by komodo7
In some steam tables, the enthalpy of evaporation is referred to as _____. a. sensible heat value ... Started by tiffannnnyyyyyy	1 Replies 38 Views	Jul 24, 2018 by ecox1012
Boilers classified as low-pressure steam boilers have a maximum operating pressure of _____. a. 5 ... Started by Jramos095	1 Replies 34 Views	Jul 24, 2018 by ally
Heat exchangers used in steam systems are usually _____. a. water-to-steam b. steam-to-air c. ... Started by Pineappleeh	3 Replies 73 Views	Jul 24, 2018 by kxciann
When condensate under pressure is released to an area of lower pressure, it can result in _____. ... Started by Chloeellawright	1 Replies 71 Views	Jul 24, 2018 by onowka
The likely cause of noise and potential internal damage to steam piping and traps, especially during ... Started by FButt	1 Replies 52 Views	Jul 24, 2018 by recede
Most steam traps fail in the _____. a. up position b. down position c. open position d. closed ... Started by Pineappleeh	1 Replies 165 Views	Jul 24, 2018 by joewallace
When wood is burned in a wood stove, the chimney and/or vent piping can become coated with _____. ... Started by casperchen82	3 Replies 77 Views	Jul 24, 2018 by mmj22343
One difference in common fuel oil burners and waste oil burners is that waste oil burners installed ... Started by student77	1 Replies 131 Views	Jul 24, 2018 by nixon_s
Indirect active solar heating systems usually circulate _____. a. an antifreeze solution in the ... Started by mp14	1 Replies 62 Views	Jul 24, 2018 by tdewitt
A direct-fired make-up air unit typically achieves a combustion efficiency of _____. a. 70 ... Started by fahad	1 Replies 20 Views	Jul 24, 2018 by AISCAMPING
One of the problems with spot coolers located indoors is that _____. a. the condenser air also ... Started by AEWBW	3 Replies 19 Views	Jul 24, 2018 by connor417
Any exposed live parts must be guarded if they are operating at _____. a. 15V or more between ... Started by bio_gurl	1 Replies 30 Views	Jul 24, 2018 by apple
In a DC series motor, how much of its full-load torque is developed at starting? a. 50 b. 100 ... Started by Themember4	1 Replies 81 Views	Jul 24, 2018 by joshbk44
Which of the following motors is used where the required starting torque is high and speed control ... Started by V@ndy87	1 Replies 35 Views	Jul 24, 2018 by Ashley I
Slip is best defined as _____. a. the difference between the synchronous speed and the speed of ... Started by waynest	3 Replies 61 Views	Jul 24, 2018 by ricroger
Horsepower is used to rate the _____. a. length of operation of a motor b. synchronous speed of ... Started by tiffannnnyyyyyy	1 Replies 91 Views	Jul 24, 2018 by quynhmickitran
In a split-phase motor, how much greater is the starting current when compared to the full-load ... Started by corkyiscool3328	1 Replies 52 Views	Jul 24, 2018 by mcomstock09
The wound rotor induction motor is used _____. a. to start low inertia loads b. for speed ... Started by Coya19@aol.com	1 Replies 49 Views	Jul 24, 2018 by soda0602