IEC 1st Year Final Review Actual Exam Questions with Verified Answers

For the circuit shown in Figure 128.203, the fixed resistance of Lamp 2 is _____ ohms.

Seven 1/0 AWG THHN THWN copper current carrying conductors are installed in a conduit. How much current can each of these carry (corrected ampacity) where the conduit is installed in an area where the summertime temperature is 142 °F?

When they are installed in a conduit with other circuits, 12 AWG THHN / THWN circuit conductors can carry_____ amps. There are total of 10 current-carrying conductors in the conduit. The conduit is installed through the bar joists above the ceiling where the temperature is 139 degrees Fahrenheit.

Refer to Figure 121.218. The raceway is conduit is Schedule 40 PVC and contains a 120-volt, 20amp GFCI-protected. The conduit buried beneath the driveway for a house. The driveway is 6 thick. Minimum distance for Y is____ in.

Where contained in a cable, the Code reference that states when a conductor with white insulation may be used as an ungrounded circuit conductor is in Section____.

According to Article 422, an accessible separable connector or an accessible ____ shall be permitted to serve as the disconnecting means for cord-and-plug-connected appliances.

Does the NEC permit a 2-pole circuit breaker to be used as the disconnecting means for a 3.3 KVA, 240-volt, 10 air compressor? The equipment is installed in the electrical room with and is within sight of the circuit breaker panelboard.

Five 10 AWG THHN / THWN copper current-carrying conductors are installed in a conduit. How much current can each of these carry (corrected ampacity) when the conduit is installed in an area where the summertime temperature is 138 °F?

For Scenario 125.103-240, amps of current will flow through each heating element.

For Scenario 125.103-480,____amps of current will flow through each branch circuit conductor.

Refer to Figure 130.104. In amps, how much current will flow in the circuit conductor, connected to terminal 9 on the 2-pole?

Refer to Figure 130.104. Circuit 14 will draw___amps.

Refer to Figure 129.105. The voltage applied to element R₂ is____volts.

Refer to Figure 119.105. When correctly connected, the dimmer is connected in_____with the two luminaires.

Refer connected to Figure 119.105 Schematic Diagram_____(below) shows the dimmer and the lamps correctly.

What is the monthly energy cost to operate a 200-watt high-pressure sodium lamp? Electricity costs $0.11 per kW-hr and the lamp be ON for 12 hours per day. There are 30 days in a billing month.

Refer to Figure 128.202. Volts are applied across the water heater element.

Refer to Figure 128.202. The neutral conductor carries _____amps.

220.52(B) - Nameplate or 1500VA is allocated for laundry circuit.

Overcurrent - Type of circuit condition. Example: overload, short, and ground fault.

GEC (Grounding electrode conductor) - A conductor used to connect the system grounded conductor or the equipment to a grounding electrode to a point on the grounding electrode system.

A 100-gallon water heater is to be installed to supply hot water to the restrooms in an office building. Should it be considered a continuous load and be upsized accordingly?

310.12(A) - Lists the size of residential service conductors.

210.21(B)3 - Lists the receptacle sizes per branch circuit sizes. Example: you can put a 15a or 20a receptacle on a 20 amp circuit.

210.8 - Covers when GFCI protection is required.

An unfinished basement must have how many outlets that are GFCI protected?

Service conductors must maintain minimum clearance of___ from doors and windows.

Chapter 9, table 8 - Where you can find circular mil area of conductors.

Dryer load calculation - When performing a load calculation, you must allocate 5KW or the nameplate rating of clothes dryer whichever is higher.

Dwelling load calc - When performing a load calculation, you must allow 3VA per square foot for dwelling (NEC 220).

Electric furnaces are considered continuous duty and required conductors upsized by 125%.

Short circuit - Fault between two or more circuit conductors. Example: hot 2 hot, hot 2 neutral.

What is the force that causes current flow?

Two particles that have opposite charges will:

Two particles that are both positively charged will:

A heating element in a plate warmer in a restaurant is rated to deliver 4.5 KW at 240 volts. How many amps does that plate warmer draw at 240 Volts?

The electrical supply house has 7532 feet of 12-2/G and 3927 feet of 12-3/G. How many more feet of 12/2G are there than 12-3/G?

A circuit is to be run to a parking lot light. The blueprints call for you to run 8 AWG wire that has a diameter of .128 inches. However, you ran #10 wire that has a diameter of .116 inches. You have _____ total Circuit.

An electrical contractor purchased the following materials for a certain job: 2500 Feet of 12/2 Romex for $321.30; 6- Ceiling fans for 42.17 each; and 150 feet of EMT conduit for $.17 per foot.

212F=_____ C.

107.38 is a _____ gang box.

An electrician was making 13.50 per hour and worked 40 hours a week. He had bought a new truck and needed to make more money but was turned down for a raise. He got mad and quit and was out of work for two weeks. He is now working a new job that pays $14.25 per hour. Working 40 hours per week at the new job, how many weeks will he have to work to make up for the pay that he lost while out of work?

Refer to Figure 107.1316. An Electrician has to set four circular transformers on a concrete pad. Two of the transformers are 23 inches in diameter, one transformer is 28 inches in diameter and one transformer is 18 inches in diameter. The total area these transformers will cover is ___ square inches.

The Volume of the tank shown in Figure 107.1424 is ____ Cubic yards.

What is the resistance of an incandescent lamp if the manufacturer supplies the following information: 100 watts 277 volts.

What is the current drawn by the hair dryer if the nameplate supplies the following information and it is operated at 110 volts: 1750 watts 120 volts.

What is the power used by the hair dryer if the nameplate supplies the following information and it is operated at 110 volts: 1750 watts @120 volts.

Which of these tools should be used to cut bolts?

Which of these tools is a jab saw?

A smooth shank screw with a tapered point for use exclusively in wood is the description for ___.

Six 20 watt, 12-volt luminaires are supplied from a small, 12-volt transformer that is 60 feet away from the fixtures. The wire used is 14 AWG. What is the voltage applied to the fixtures? Use K=11.6.

You have to run a 240-volt circuit to a 24-amp load that is located 321 feet away from the panel. The smallest size wire you can pull in for the circuit is ___ AWG. The voltage drop cant exceed 4.8 volts. Use K = 10.9.

The maximum distance permitted between a box and the first strap for an installation using 1 inch LFMC is ________ FT.

EMT shall be securely fastened in place at least every___. In addition, each EMT run between termination points shall be securely fastened within _____ of each outlet box, junction box, device box, cabinet, conduit body or other tubing termination. NEC 358.30.

A single Pole, double-throw switch has ____ screw terminals for the connection of current carrying conductors.

For the connections of current carrying circuit conductors, a DPST switch has ______ screw terminals.