Test Equipment
A device that can be used as a safe known energized source in a live-dead-live test is known as a _____.
proving unit
What is the total resistance of three resistors in parallel with values of 2 ohms, 4 ohms, and 4 ohms?
1 ohm
Materials with electrical characteristics that fall between those of insulators and conductors are considered ______.
semiconductors
If the phase angles of two sine waves are both 0 degrees, then the waves _____.
are in phase
1. If the time for one cycle is 0.2 seconds, the frequency is _____.
5Hz
If a three-phase motor will not start, which instrument can be used to verify that there is power available?
Voltage tester
The current flowing through a hair dryer that uses 1,200 watts of power with an applied voltage of 120V is _____.
10A
An electron repels a(n) _____.
electron
A circuit has a peak voltage of 310V. What is the average voltage value?
197V
What is the frequency of an AC waveform that completes 30 cycles per half second?
60Hz
When a supply circuit is de-energized, the associated circuits _____.
may still be energized due to backfeeds
If a circuit has a voltage of 240V across two parallel branches with current loads of 20A and 25A, the total current is _____
45A
Coulombs are a measure of ______.
electric charge
What is the current flow in a purely resistive AC circuit if the resistance is 20 ohms and the voltage is 240V
12A
The opposing force that an inductor presents to the flow of alternating current is called
inductive reactance
Certified meters are marked with their category rating on the _____.
meter housing
A circuit diagram shows that the circuit divides into separate branches and there are also series loads. This is a _____.
series-parallel circuit
A measurement of 1,000 mils is equal to _____.
0.01 inch
What is the true power in a 2A series RL circuit with a 50Ω resistor?
200W
A 20-microfarad capacitor is in parallel with a 10-microfarad capacitor. The total capacitance is _____.
30 microfarads
Which overvoltage category rating would apply to measurements taken at a service entrance
CAT IV
There are four resistors in a circuit with an applied voltage of 120V. The voltage drop across three resistors is 10V each. What is the voltage drop across the fourth resistor?
90V
In a parallel circuit, the voltage drop _____.
is the same across all loads
In a circuit that has both capacitance and resistance, the current will lead the voltage ______.
by some angle between 0° and 90°
Each of two equal capacitors in series has_____.
half the applied voltage