Skills and Trades

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Which of the following systems would be most likely to produce a power waveform that would require a ... Started by sjones	1 Replies 26 Views	Jul 24, 2018 by Ddddd
How does a weighted average meter measure alternating current? A) It calculates the root mean ... Started by newbem	1 Replies 91 Views	Jul 24, 2018 by tkempin
How is the minimum circuit ampacity (MCA) calculated for an air-conditioning unit with more than one ... Started by codyclark	1 Replies 185 Views	Jul 24, 2018 by shayla
A wye three-phase power supply provides: A) 24 V between the legs. B) 240 V between the legs. C) ... Started by joesmith1212	3 Replies 28 Views	Jul 24, 2018 by voltaire123
Systems with fixed-restriction metering devices are critical to charge because: A) You must ... Started by RRMR	1 Replies 46 Views	Jul 24, 2018 by Perkypinki
The voltage between any leg of a 480 V wye transformer and ground is: A) 240 V. B) 208 V. C) 277 ... Started by cabate	1 Replies 77 Views	Jul 24, 2018 by cupcake16
As the indoor wet-bulb temperature increases, the required superheat: A) Decreases. B) ... Started by Diane	1 Replies 12 Views	Jul 24, 2018 by ngr69
What unit specification should be used to size the overcurrent protection? A) The minimum circuit ... Started by JMatthes	3 Replies 77 Views	Jul 24, 2018 by Jossy
One problem resulting from operating an air conditioner using undersized power wiring is: A) The ... Started by sc00by25	1 Replies 20 Views	Jul 24, 2018 by Tonny
A fixed-restriction system operating with a refrigerant undercharge will have: A) A low system ... Started by sc00by25	1 Replies 69 Views	Jul 24, 2018 by raili21
What specification on the unit data plate should be used to size the power wire? A) The rated ... Started by saraeharris	1 Replies 26 Views	Jul 24, 2018 by JYan
An R-22 system is operating with a liquid pressure of 226 psig (110 saturation temperature). The ... Started by littleanan	3 Replies 82 Views	Jul 24, 2018 by parker125
How is the minimum circuit ampacity for an air-conditioning condensing unit calculated? A) ... Started by casperchen82	1 Replies 61 Views	Jul 24, 2018 by Missbam101
What type of fuses should be used with air-conditioning systems? A) One-time fuses B) Slow blow ... Started by V@ndy87	1 Replies 282 Views	Jul 24, 2018 by Jody Vaughn
A thermostatic expansion valve system operating with a refrigerant undercharge will have: A) A ... Started by dalyningkenk	1 Replies 56 Views	Jul 24, 2018 by gstein359
An air conditioner with a thermostatic expansion valve is operating with a condenser saturation ... Started by APUS57	3 Replies 39 Views	Jul 24, 2018 by Eazy416
The fastest method for charging a large system that holds 50 lb of refrigerant is to add: A) ... Started by dollx	1 Replies 174 Views	Jul 24, 2018 by Tonyam972
Three-phase AC power is used: A) Only in residences. B) In both residential and commercial ... Started by plus1	1 Replies 44 Views	Jul 24, 2018 by lucas dlamini
Which of the following types of charge is usually employed when a partial charge is required? A) ... Started by gonzo233	1 Replies 181 Views	Jul 24, 2018 by leannegxo
In an AC capacitive circuit: A) The voltage and current are in phase. B) Voltage leads current. ... Started by nummyann	3 Replies 155 Views	Jul 24, 2018 by allisonblackmore
To speed up evacuation, you should use: A) Large-diameter, long hoses. B) Small-diameter, long ... Started by Chloeellawright	1 Replies 199 Views	Jul 24, 2018 by cloudre37
For a deep vacuum to complete, the system pressure should hold: A) Above 500 microns. B) ... Started by SGallaher96	1 Replies 70 Views	Jul 24, 2018 by leeeep
Why can't impedances in series in an AC circuit simply be added to find the total circuit impedance? ... Started by jasdeep_brar	1 Replies 199 Views	Jul 24, 2018 by johnharpe
Which of the following is actually being measured when a vacuum is measured in microns? A) The ... Started by dejastew	3 Replies 88 Views	Jul 24, 2018 by nixon_s
How should the vacuum gauge and vacuum pump be connected to a four-port manifold? A) The vacuum ... Started by brutforce	1 Replies 97 Views	Jul 24, 2018 by LVPMS