Skills and Trades

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Variable-frequency drives (VFD) reduce the speed of AC motors by: A) Applying an adjustable ... Started by D2AR0N	1 Replies 40 Views	Jul 24, 2018 by reversalruiz
When installing electric furnaces, all aspects of the power wiring circuit are crucial because of: ... Started by corkyiscool3328	1 Replies 23 Views	Jul 24, 2018 by Melissahxx
What is the primary purpose of the start capacitor? A) To increase the motor starting torque B) ... Started by dbose	1 Replies 79 Views	Jul 24, 2018 by orangecrush
The house electrical service should be checked before installing a unit in an older house because ... Started by urbanoutfitters	3 Replies 70 Views	Jul 24, 2018 by nmyers
The start capacitor is removed from the CSCR circuit by: A) A starting relay. B) The normally ... Started by ap345	1 Replies 47 Views	Jul 24, 2018 by AaaA
The newest HVACR control systems operate by: A) Providing a modulating air pressure in response ... Started by segrsyd	1 Replies 72 Views	Jul 24, 2018 by potomatos
A system that monitors the outdoor temperature to control some aspect of system operation is: A) ... Started by Alygatorr01285	1 Replies 65 Views	Jul 24, 2018 by potomatos
The amount of ice required for a restaurant is approximately: A) 3 lb per person. B) 6 lb per ... Started by washai	3 Replies 68 Views	Jul 24, 2018 by Toya9913
The proper way to discharge a capacitor is to: A) Apply 230 V to the terminals for a short period ... Started by HudsonKB16	1 Replies 24 Views	Jul 24, 2018 by bpool94
After installing a new electric furnace, the technician measures the temperature rise and finds that ... Started by nramada	1 Replies 58 Views	Jul 24, 2018 by Dnite
Which ice is often added to drinks and is easy to chew? A) Crushed ice B) Flake ice C) Cubed ice ... Started by fox	1 Replies 118 Views	Jul 24, 2018 by alexisweber49
How is voltage drop through the power wire to the unit checked? A) Measure the resistance of the ... Started by jeatrice	3 Replies 57 Views	Jul 24, 2018 by mcni194
How is ice quality measured? A) Ice quality is measured in the amount of minerals per inch. B) ... Started by bio_gurl	1 Replies 43 Views	Jul 24, 2018 by ebe
When checking an electric furnace, the technician should check: A) The loops per inch of each ... Started by tatyanajohnson	1 Replies 38 Views	Jul 24, 2018 by mathjasmine
In most 24 V AC low-voltage systems the red wire is hot, the yellow wire is the cooling circuit, and ... Started by Alygatorr01285	1 Replies 38 Views	Jul 24, 2018 by jessicaduplan
What is the difference between crushed ice and flake ice? A) Flake ice is made by spraying water ... Started by fox	3 Replies 89 Views	Jul 24, 2018 by abro1885
Select the characteristics of cubed ice. You may select more than one. A) 95 percent hardness B) ... Started by natalie2426	1 Replies 60 Views	Jul 24, 2018 by uniquea123
A visual inspection reveals a broken heating element, an open fusible link, and a cracked ceramic ... Started by Pineapplelove6	1 Replies 18 Views	Jul 24, 2018 by 14vl19
When is the B terminal energized on most low-voltage thermostats? A) Whenever the thermostat ... Started by segrsyd	1 Replies 32 Views	Jul 24, 2018 by peter
In a building, when exhaust air exceeds ventilation air, a negative pressure is created and the ... Started by rachel9	3 Replies 22 Views	Jul 24, 2018 by katieost
The resistance reading of an open heating element is: A) Infinite ohms, which would show OL on ... Started by beccaep	1 Replies 36 Views	Jul 24, 2018 by macagnavarro
Why is it advantageous to maintain a positive pressure in a building? A) To reduce drafts B) To ... Started by Evvie72	1 Replies 25 Views	Jul 24, 2018 by nhea
A difference between a straight heat-cool thermostat and a heat pump thermostat is that: A) Y and ... Started by melly21297	1 Replies 59 Views	Jul 24, 2018 by phuda
To prevent mineral buildup and scale on an ice machine: A) Use an ultraviolet light. B) Test the ... Started by jparksx	3 Replies 148 Views	Jul 24, 2018 by Smiles0805
The run capacitor of a permanent split capacitor (PSC) motor: A) Boosts the motor line voltage. ... Started by KimWrice	1 Replies 55 Views	Jul 24, 2018 by Ddddd