VS #1
Which of the following best describes the term “current” as it applies in an electrical circuit?
The amount of electricity
How much current will an electric water heater. rated at 1500w, draw if it is connected to a circuit operating at 240 volts and operating at maximum capacity? (No rounding)
6.25 amperes
At what voltage does OSHA establish that the voltage is high enough to pose a threat to a person if they make contact with energized parts?
50 volts
"The purpose of this Code is the (blank ) of persons and property from hazards arising from the use of electricity."
Per NEC Article 90.8(B), what does limiting the number of circuits in a single enclosure do?
Minimizes the effects from a short circuit or ground fault
A circuit contains a 2400-Ω, a 4400-Ω, and a 6600-Ω resistor connected in parallel. The circuit has a total current flow of 0.38 A. Which nominal voltage systems is most likely applied to the circuit?
480v
Resistors in a circuit (blank) the flow of current.
Impede
Is voltage, in a series circuit, cumulative or consistent?
Cumulative
What is Ground in regard to the NEC?
Earth
A dwelling unit includes permanent provisions for?
Living, sleeping, cooking, and sanitation
What are the five conditions that must be met when installing parallel conductors?
1. Same length
2. Same material
3. Same cmil area
4. Same insulation
5. Same termination and connection
What ampacity will a copper 4/0 THWN conductor have when rated at 75°C?
230 amperes
Which table contains ampacity values for conductors in a raceway or cable, based on an ambient air temperature of 30°C?
Table 310.16
In what manner does a "disconnecting means" disconnect ungrounded conductors?
Simultaneously
The Minimum Clear Distance for Nominal Voltage to Ground at 151v-600v, under Condition 3 is...
1.2 m (4 ft)
What is a transformer's primary function?
To change voltage
How many degrees out of phase are the current and voltage when under observation in a purely resistive AC circuit?
0
What causes Eddy Currents?
Constantly changing polarities
Receptacles installed within 6 ft of which edge of the bowl of the sink are required to be GFCI protected?
Top inside edge
What protection is required of an extension to an existing branch-circuit should the extension not be more than 6 ft and not include any additional devices?
None
DAILY DOUBLE
A series circuit has an applied total voltage of 240 volts. At one of the resistors, the voltage drop is measured at 96 volts, and the power at that resistor is measured at 192 watts. What is the total resistance in the circuit?
120 Ω
What is the value of P3?
ET= 277V E1= E2= E3=
IT= .33A I1= .33A I2= I3=
RT= R1= 350Ω R2= 200Ω R3= 300Ω
PT= P1= P2= P3=
32.67W (V/A)
Using an oscilloscope, an angle value of 69° is given to calculate voltage in an AC circuit. At the 69th degree, a voltage value of 113V is present. What is the maximum voltage of the given AC circuit? (Round to the second decimal place. Leniency is given within .5 volts)
121.51
A multimeter is connected across a transformer's primary winding and values of 244V and 17A are displayed. The secondary winding is then tested and a value of 600V is shown. What is the secondary winding's amperage? (Round to the second decimal place)
6.91 amperes
Twelve, 10AWG copper-clad aluminum conductors are installed in a 1" EMT conduit. The conductors, having THHW insulation, are located in an environment in which the ambient temperature is 47°C. What is the adjusted and/or corrected ampacity of the aforementioned conductors? (Do not round unless the decimal place is .5 or higher).
11A