CORRECT ANSWERS 2026
What wire has the highest resistance? - CORRECT ANSWER -Chromium
Z- Impedance - CORRECT ANSWER -The total opposition to an AC circuit, combining all
resitances
Z= square root of R^2 + (XL- XC)^2
True Power - CORRECT ANSWER -Total power of circuit in Watts
P(true)= P(App.) x PF
Oil is used in many large transformers to? - CORRECT ANSWER -To insulate the coils
Apparent Power - CORRECT ANSWER -Starting power
P(App) = E x I (Volt Amperes)
Power Factor - CORRECT ANSWER -P(True) / P(App) OR PF=R/Z
Xc= Capacitive Reactance - CORRECT ANSWER -Xc= 1/ (2)(π)(F)(C) OR 159,000/ (f x μfd)
Xl= inductive reactance - CORRECT ANSWER -Xl= (2)(π)(F)(L)
Circuit breakers used for switching shall be marked: - CORRECT ANSWER -SWD or HID
An insulated wire shall have its AWG marking every _______ feet - CORRECT ANSWER -Two
, The cold resistance is ________ than the hot resistance. - CORRECT ANSWER -Less than
Celsius to Fahrenheit - CORRECT ANSWER -F = 9/5C + 32
Wire Temp. Abbreviations - CORRECT ANSWER -No H = 60° C
1 H = 75°C
2 H= 90°
Voltage is _________ to the # of turns - CORRECT ANSWER -Proportional
To select the proper fuse, it is necessary to know the... - CORRECT ANSWER -voltage and
amperage
When under ordinary conditions, device boxes for concealed work shall have a depth of not less
than... - CORRECT ANSWER -1/2"
The largest size conductor that may be used in under floor raceway is... - CORRECT ANSWER -
that for which it is designed for
A 277V light circuit may not be used to supply... - CORRECT ANSWER -A standard medium base
To determine the insulation resistance of a newly installed wiring system, best procedure is t
megger test... - CORRECT ANSWER -between the wires and from each wire to the conduit
Fixed appliance versus portable appliance ampacitiy ratings - CORRECT ANSWER -Fixed
appliance= 50%