IEC year 2 final review Latest Update -

IEC year 2 final review Latest Update - Actual Exam 125 Questions and 100% Verified Correct Answers Guaranteed A+

___ is permitted to be installed in a concrete floor slab.

• Schedule 40 PVC

II. FMC

III. aluminum MC cable - CORRECT ANSWER: I only

___ is the measure of a circuit's ability to store an electrical charge. - CORRECT

ANSWER: Capacitance

___ is the output of an AC generator measured in cycles per second. - CORRECT

ANSWER: Frequency

___ power is power that passes through reactive components, which do not consume

energy, and returns to the source. - CORRECT ANSWER: Reactive

350A fuses are used in the safety switch shown in Figure 205.12. The flex to the motor contains three 4/0 AWG conductors. The minimum size of the Equipment Grounding

Conductor (EGC) to the motor is ___ AWG. - CORRECT ANSWER: 3

A 3-phase load draws 37.3 amps and is operating at 208 volts. This load is using ___

KVA of power. - CORRECT ANSWER: 13.438

A 3/ 4-inch PVC conduit is to be run underground below an area adjacent to a house where a 6" thick driveway will be poured on top of the dirt surface after the trench is backfilled. The conduit will contain GFCI protected 15-Amp circuit conductors feeding a post luminaire in the front yard. The minimum depth the conduit must be below the

present dirt surface level (future driveway) is ___ inches. - CORRECT ANSWER: 6

A 480-volt motor circuit can be protected with a safety switch that is rated at ___ volts. -

CORRECT ANSWER: 600

A combination starter is a ___. - CORRECT ANSWER: both a & b

A set of wires (black, red, blue and green) are installed between a 3-pole safety switch and a 3Ø motor. The direction of rotation of the motor can be changed by swapping the ___ wire connections on the load side of the switch. - CORRECT ANSWER: black and blue

A sine wave will hit its peak value ___ time(s) during each cycle. - CORRECT

ANSWER: 2

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A single-phase transformer requires 32 amps at 480 volts on the primary to deliver 120- volt power to a 14.6 kW load. The efficiency of this transformer is ___ %. - CORRECT

ANSWER: 95

A steel plate is required to protect ___ where it is installed through wooden framing members. A 1? inch clearance from the edge of the framing member can NOT be maintained

I. EMT

II. Schedule 40 PVC

III. RMC - CORRECT ANSWER: neither I nor II nor III

A three-phase 69 KVA load will be connected to a circuit that is fed from a 3-pole breaker in a 120/240-volt 3Ø, 4-wire panel. This load will draw ___ amps of current

through each circuit conductor. - CORRECT ANSWER: 166

A three-phase, 240-volt feeder is going to supply power to one 5 hp 3Ø motor, three 2 hp 3Ø motors, and two 1 hp 3Ø motors. The minimum size aluminum THWN/THHN

conductors permitted for this feeder are ___ AWG. - CORRECT ANSWER: 6

A three-phase, 240-volt feeder is going to supply power to one 5 hp 3Ø motor, three 2 hp 3Ø motors, and two 1 hp 3Ø motors. The minimum size conductors permitted for this

feeder are ___ AWG. - CORRECT ANSWER: 8

A transformer has a primary rated voltage of 120 and a secondary rated voltage of 16. If the current in the circuit conductors connected to the primary is 1.1 amps, the load that

is connected to the secondary must be drawing ___ amps. - CORRECT ANSWER: 8.25

A transformer is installed to serve a 240-volt, three-phase, 69 KW load. The smallest

permitted secondary conductors are ___. - CORRECT ANSWER: 2/0 AWG

A transformer supplies power to a 240-volt, 3Ø, non-continuous 32.286 KVA load. The smallest secondary circuit conductors that can be used are ___ AWG. - CORRECT

ANSWER: 4

A transformer vault is located in the basement of a high-rise building. Where the vault is not protected by an automatic fire suppression system, the minimum concrete floor

thickness is ___ inch(es). - CORRECT ANSWER: 4

A(n) ___ refrigerant motor-compressor is a combination compressor and motor in the same housing, having no external shaft or shaft seals, with the motor operating in the

refrigerant. - CORRECT ANSWER: hermetic

AC cable is the wiring method to be used above in Figure 208.3. The length of the AC cable between luminaires is 10 feet. The maximum distance permitted between support

#7 and support #8 is ___ feet. - CORRECT ANSWER: 4 1/ 2

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