QT review Year 1

Which wire size listed below has the highest resistance? Use Table 8 in Chapter 9.

# 6 THHN copper

The electrician bought $147.50 worth of new hand tools. The sales tax was 8.25%. What was the total cost of the tools?

$159.67

Eight light fixtures cost $192.00. What is the cost of one light fixture?

$26

As shown in Figure 107.35, is referred to as a blank "1900" or "4-square" cover.

(е) ll

The cross-sectional area of a 4 AWG THHN/THWN copper conductor is square inches.

.0824

5,832 cubic inches = ___.____cubic yards

.125

Refer to Figure 108.005. This is a plan view of a house. The fewest number of receptacles that can be installed in the 12 foot long wall space between points 8 and 1 is

1

The fewest number of receptacles that can be installed outside on the back of a house is

1

The maximum distance permitted between a box and the first strap (support) for an installation using 1" LFMC (liquidtight flexible metal conduit) is ____ft.

1

Refer to Figure 105.1503. To the nearest 1V1th inch, the height (top to bottom) is inches.

1 3/8

Figure 107.1315 is the floor plan for a building. The plan has a rectangular area with a right-triangle-shaped area on the left end and a square-shaped area above the right the necessary formulas, the total floor area is ___ft squared

1,090

Where loads are likely to be ON for 4 hours, the computed load for sizing branch-circuit conductors and OCPDS must be calculated by multiplying the actual load current times

1.25

1,937 watts is equal to kilowatts (kW).

1.937

The EWR Floor Plan uses a scale that is

1/4" = 1

Flat cable assemblies shall have conductors of AWG special stranded copper wires.

10

If you are standing on the highest permitted step on a 12-foot step ladder, your feet will be about feet above the floor. You are 6 feet tall.

10

The minimum size THWN/THHN copper conductors that are permitted to be used for an 18-ampere load in a 143°F location are AWG.

10

Any the following items of electrical equipment are devices, except for a

100 watt lamp

What is the minimum size THWN/THHN copper conductor that is permitted for a 20-ampere load in a 121°F location? Don't forget to check the "small conductor" rules in 240.4(D).

12 AWG

For a 120/208-volt, 30, 4-wire supply system the voltage from AØ to neutral is

120

Refer to the Article 100 definition for continuous load in the NEC. According to 210.19(A) and 210.20(A), the branch-circuit conductors and overcurrent protection for a continuous load shall be sized at not less than_____ times the current drawn by the load.

125%

A 15-amp circuit breaker protects a circuit that is connected to several receptacles. The smallest size cc circuit conductors that can be used for this circuit are AWG.

14

How many 10 AWG conductors may be installed in a 411/16 x 2/" square box?

16

Refer to Figure 107.1311. Dimension X Dimension Y = 153 inches The area is ft squared

163

Specification 28 dictates that 2/0 AWG THHN/THWN service conductors be connected to the main breaker in EWR dwelling Panel A (Main Service Panel). Using the 75°C column of Table 310.15(B)(16), the ampacity of the 2/0 conductors is amps.

175

Refer to Figure 107.1311. Dimension X Dimension Y= 153 inches The area is yd squared

18

Eight conduits will be installed in the bottom of a trench as shown in Figure 107.1404. The specifications You must order the concrete to fill the bottom of the trench as shown. conduits. Each conduit has an outside diameter of 31/, inches. require that the concrete completely surround the conduits. and red concrete will be poured around the conduits Deduct the volume occupied by The duct bank dimensions are: Concrete to order= yd3 width - 24 inches height 13 inches length 322 feet

19.46

Four rooms of a house contain lamps that have the following wattages: The living room has 4-150 watt lamps; the dining room has 5-75 watt lamps; the master bedroom has 2-75 watt lamps and 4-150-watt lamps the bathroom has 3-65 watt lamps. What is the total load when all lamps are operating?

1920 watts

Refer to Figure 108.005. This is a plan view of a house. The fewest number of receptacles that can be installed in the 16-foot-long wall space between points 4 and 5 is

2

Six metal device boxes will be ganged together to form a 6-gang switches, and one motion switch will be installed in the box conductors, five switch legs, and five grounding assembly. The following conductors enter the box. One GFCI receptacle, four single-pole box assembly: four ungrounded conductors, five grounded conductors. Also, five cable clamps are contained in the assembly. All the conductors are 12 AWG. Each of the ganged boxes will have to be 3" x 2" x ____

2 1/4 inches

In a dwelling, what is the minimum width of a wall space that requires a receptacle outlet?

2 feet

How many cubic yards of concrete will it take to pour 4 transformer pads? Two of the transformer pads are 84 feet x 63/4 feet x 4 inches. The other two are 73/4 feet x 51/2 feet x 4 inches.

2.4275

What is the corrected ampacity of a #14 THHN/THWN copper conductor where the temperature is 120°F?

20.5

The specifications require that you limit the voltage drop on any circuit to 2.5 %. For a 208-volt circuit, this means that the voltage applied to any load cannot be less than ___volts.

202.8

Table of the NEC® gives the minimum wire sizes, based on circuit rating, that can be used for branc circuits with two or more outlets or receptacles.

210.24

Section in the NEC® states that, for dwellings: "Receptacle outlets in or on floors shall not be counted as part of the required number of receptacle outlets unless located within 450 mm (18 in.) of the wall."

210.52(A)(3)

Section of the NEC® states that a refrigerator may be supplied by a separate 15-amp circuit.

210.52(B)(1) Exception 2

A duct heater has a nameplate rating of 6.32 KW @ 250 volts. This duct heater will draw ____amperes, when operated at 230 volts.

23.26

What is the corrected ampacity of a 14 AWG THHN/THWN copper conductor where the temperature is 90°F?

24.0

A# 12 THHN/THWN copper conductor, where the ambient temperature is 120°F, has an adjusted ampacity

24.6

For this question, assume that this is a 240-volt, single-phase installation. A 6,500 watt cooking range installed in a residence will draw when operated at 240 volts.

27 amperes

Where installed in conduit in a 100°F environment 12 AWG copper THHN/THWN conductors have a corrected ampacity of amps.

27.3

Where the temperature is 90°F the adjusted current-carrying capacity of a 12 AWG THHN/THWN copper conductor is amps.

28.8

The power used by a 12-volt circuit with 24 amperes of current is _____watts

288

In a dwelling a receptacle is to be installed on a wall adjacent fixed., one sliding). The distance between points D and is 3 to a sliding glass door. The door consists of two 3-foot glass panels as shown below (one feet. The maximum distance between point and the receptacle feet.

3

Refer to Figure 110.16. You are to run 320 feet of PVC underground from a panel to a 30-foot-tall parking lot light pole. Install copper THHN/THWN circuit conductors from the breaker to the luminaires on top of the pole. The luminaires will draw a total current of 15.182 amps. The voltage measured at the circuit breaker is 211 volts. In order to supply at least 208 volts to the luminaires, the smallest size wire is AWG. Use NEC Chapter 9, Table 8 and K=12

3

You know that a load connected to a circuit is using .4 kW of power and the resistance of the load is 40 ohms. What is the current drawn by the load?

3.16 amps

How many cubic yards of concrete are in a transformer pad that is 8 feet wide, 12 feet long, and 1 foot thick?

3.556

According to the NEC®, what is the largest size of flexible metallic tubing (FMT) that can be used?

3/4 inch

What is the ampacity of one 12 AWG THHN/THWN copper conductor at 86°F?

30 A

Section of the NEC requires metal boxes to be large enough to enclose all conductors and wiring devices

314.16

The NEC® requirements for securing Type MC cable close to a box are located in Section

330.30

To get a 40-inch long 90° stub-up in 1-inch RMC (rigid metal conduit), you will place the bender arrow at inches from the measured end of the conduit.

34

for one receptacle, four 12 AWG conductors, two cable According to NEC® box fill requirements, which of the following boxes is the smallest permitted to be used clamps and two 12 AWG ground conductors?

4 square x 1.5 box

Type AC cable shall be secured by staples, cable ties, straps, hangers, or similar fittings at intervals not exceeding feet.

4.5

Provisions for flexible cords are found in Article in the NEC

400

Scenario 125.102-480 this case, the supply circuit is 480 The nameplate on a 10 boiler (big water heater) indicates that it can be connected to either a 240- or 480-volt circuit. In volts. It contains two heating elements. Each element has a rating of 11.3 KW at 240 volts. the boiler will pull amps through each branch circuit conductor.

47.1

What is the corrected ampacity of a #6 THHN / THWN copper conductor where the temperature is 147°F?

48.75

The highest rung you can stand on when working on an extension ladder is the rung from the top of th ladder.

4th

Twenty-four concrete housekeeping pads are to be poured. Transformers located throughout the high rise building. One of these pads is shown in Figure 107.1405 will be set on these pads that are L 52" W 34" D 52"

5

When four 3" x 2" x 2/2" metal device boxes are ganged together, the total volume is___

50

as shown in Figure 105.1518. To run from the CenterPoint You are going to have to dig a trench and install conduit underground to supply power to the office building transformer to the service along Route B. feet of conduit will be required.

510

Among the circuit breaker sizes listed below, is NOT a standard size per Article 240.

55

Which of the following is NOT a standard size circuit breaker (or fuse) per Article 240?

55

The smallest size wire that can be run from a 1-pole circuit breaker in a 120/240-volt, 10, 3-wire panelboard to a 13.1-amp, 120-volt load is AWG. The load is located 198 feet from the panel. Use K 12 and liteit the voltage dropped in the circuit conductors to 3 %.

6

The mounting holes on the face of box IV in Figure 107.36 are tapped for screws.

6-32

A 750 watt heating element will draw amps at 120 volts. The element is rated to operate at 120 volts.

6.25

A motor load that is located 250' from the panel is using 6 AWG XHHW aluminum conductors. What is the voltage drop on the wire if the running load is 18 amps? Use K = 20.

6.86

4 inch trade size Schedule 40 PVC (rigid polyvinyl chloride conduit) shall be supported at a minimum of every feet

7 NEC350.30

7.2 kilowatts (kW) is equal to watts.

7,200

How many volts are dropped in the circuit conductors in a 120-volt circuit consisting of #12-2 with ground Type AC (Armored Cable or BX)? The load connected to the circuit draws 12 amps and the distance from the panel to the load is 160 feet? (Use K=12)

7.06

To run a 120-volt, 1/2 hp 8-amp motor load, 300' of Type NMS 90 degree rated Cu (copper) cable is used Find the wire size nęcessary for a maximum of 3 % voltage drop. Use K = 12.

8

The mounting holes on the face of box II in Figure 107.36 are tapped for screws

8-32

Refer to Figure 107.1314. Dimension D = 117 inches The area is ydsquared

8.3

Several luminaires are to be connected to a 12-volt lighting transformer (power supply). The luminaire load is drawing a total of 25 amps. The circuit wiring is 60 feet of 2-conductor armored cable containing 10 AWG copper wire. What is the voltage at the luminaires? Use K= 11

8.8

In a dry location, the maximum operating temperature of a conductor with Type THHN insulation is

90 degrees

What is the temperature rating of UF cable insulation where installed as a substitute for NM cable?

90°C

Refer to Figure 106.22. If a 22/offset is made, there are degrees of 2 bends in the conduit.

Both 22 added = 45°

_____ flow equals current flow.

Electron

Live vegetation, such as trees, may support overhead conductor spans.

False

PPE is an abbreviation for Pain Prevention Equipment.

False

If the voltage is lowered in a simple circuit, what will the current do?

Go down

As shown in Figure 107.32, is referred to as a "handy" box. d. I

I, the round box

Which organization sponsored the NEC in 1911?

NFPA

Are at least two 20-amp small-appliance branch circuits required by the NEC® to supply power to countertop receptacles in commercial restaurant kitchens (such as Dairy Queen)?

No

Section 314.3 of the NEC® permits nonmetallic outlet and device boxes to be installed with which of the following?

Nonmetallic

Which of the fasteners shown below can use a nut as a part of the fastening system?

Round top with bolt attachment

Which of these hand tools is a nut driver?

The nut driver

It is permitted to make a surface extension from a cover fastened to a concealed box if which of the following conditions exist?

There is a flexible wiring method with a separate grounding conductor.

Which of the following can affect the frequency of accidents?

Training, Working practices, Environmental conditions

Ampacity and current-carrying capacity mean the same thing.

True

Drift punches (pins) are used to align holes in overlapping metal.

True

Hand punches that are bent should be thrown away

True

In general, safety eyewear should be worn when using power tools.

True

PPE is an abbreviation for Proper Protective Equipment.

True

Refer to Figure 106.26. The height of the obstruction times the multiplier equals the distance between the first and second marks and the third and fourth marks.

True

The main cause of falls from straight and extension ladders is sliding of the ladder base.

True

To avoid musculoskeletal disorders, you should switch tasks and/or positions from time to time to reduce time spent in awkward positions or on repetitive motions.

True

When using a wrench to tighten screws, nuts, bolts, etc. it is possible to damage the threads if too much torque is applied.

True

You should not wear contact lenses on the job unless they are required for medical reasons.

True

As covered by Article 352, rigid nonmetallic conduit is permitted to do all of the following, except where

Used to support luminaires

Full face shields can protect your face from impact hazards when worn

With safety glasses or goggles

Refer to Figure 108.014. This kitchen is in a house. Does the NEC® permit receptacle 11 to be connected to one of the 20-amp small-appliance branch circuits?

Yes

When using power tools, if you have long hair, it should be_____

a. tied back b. under a hat с. either "a" or "b'"

Type AC cable is manufactured with circuit conductors (excluding ground).

all of these

Generally, the ____of a conductor must not be less than the rating of the overcurrent device protecting the conductor

ampacity

Current is measured in

amperes

from a flush-mounted device box to be made by installing In order that the connections inside an outlet box remain accessible, the NEC® permits a surface extension

an extension ring - shown here- with EMT connected to any knockout J0 cover shown here- with flexible metal conduit attached to the knockout either a or b

NM cable is to be installed in the unfinished basement in a home. The cable will be run perpendicular to, and stapled to, the bottom of the ceiling joists. What size NM cable is permitted?

any of these

Point Z in Figure 106.11 is identified as the_____.

arrow

In a dwelling (such as your house) how many 20-amp branch circuits are required by the NEC® to supply power to an area where a clothes washing machine is to be plugged into a receptacle?

at least one

Refer to the officebuilding hallway shown above in Figure 108.020. The NEC requires receptacles to be installed in the hallway. The hallway is 63 feet long.

at least one

NEC 314.16 Which of the following boxes could be used for four each 14 AWG and eight each 12 AWG conductors?

b. 4 x 2 1/8" Square > 26cu

As shown on the EWR legend, the symbol used to represent a fan outlet is

b. Ying yang symbol

Branch circuits that serve a are required to be rated at 20 amperes where installed in a school.

bathroom kitchen clothes washing machine dneither I nor II nor III

In construction of one- and two-family dwellings, the quantity and rating of electrical circuits is usually designed by the

by the electrician

In construction of commercial and industrial facilities, the quantity and rating of electrical circuits is uşually designed by the

consulting engineer

Which materials listed below are good conductors?

copper and gold 1&III only

For a single-family dwelling with a total of 3500 square feet of occupied area, the minimum nbe of 15-ampere lighting branch circuits is

d. 6

Electrical current is the flow of

electrons

The authority having jurisdiction over electrical construction is generally the

inspector

Armored cable includes a(n) ___to ensure a low-impedance grounding path.

internal bonding strip

When sized to carry the maximum unbalanced load, the grounded conductor of a residential service permitted to be sized smaller than the "phase" (ungrounded) conductors.

is

Which of the PPES shown in Figure 102.42 are safety glasses?

ll

As shown in Figure 107.32, ______is referred to as a "plaster ring."

lll, a hexagon shape for a 1900 box

The fewest number of receptacles that can be installed along the 7'-10" & 3'-10" countertop, shown above in Figure 108.015, is This plan view shows a kitchen in a school cafeteria.

none are req'd

In the NEC® the section that lists standard circuit breaker sizes is

none of these

The minimum cubic inch capacity of the j-box (shown in Figure 129.110) you could use where circuits A17-19 (2 "hots" + a neutral") enter the box is in3. The circuits are tapped and continue to feed other equipment or outlets. The wiring method is RMC with a 14 AWG grounding conductor installed with the AWG circuit conductors. The Equipment Grounding Conductor is NOT shown on the drawing.

none of these

The plan view for the kitchen countertops in a Popeye's Chicken is shown in Figure 108.013. The fewest number of receptacles that can be installed along the 4-8" countertop is

none of these

The total number of electricians working for one electrical company is 123. Another electrical company has 40 fewer electricians. How many electricians work for the second company?

none of these

What is the maximum distance permitted between a box and the first strap (support) for a 12-3 Type AC cable installation? feet

none of these

A Type II ladder is rated to withstand a load of pounds.

of 225

Which of the following actual voltage readings would be considered to be nominal 240 volts?

the 250 206 1 & 3only

The NEC defines a branch circuit as .

the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)

Conductors that have insulation can be used in extremely cold locations such as walk-in freezers in meat-packing plant.

thermoset

169./Section 110.14(C) states: "Conductors with temperature ratings higher than or both." This means that when an ampacity specified for terminations shall be permitted to be used for ampacity adjustment, correction, correction for a THHN/THWN conductor is required listed in the 90°C column (typically from Table 310.15(B)(16) times the due to temperature, the corrected ampacity is calculated by multiplying the ampacity correction factor. This is a statement because THHN/THWN conductor has a maximum temperature rating of

true 90°C

slabs or masonry in direct contest with A location includes installations underground or in concrete with water or other liquids, such as vehicle washing areas, snd in earth; in locations subject to saturation unprotected locations exposed to weather.

wet

The safety equipment shown above in Figure 102.50 is used when Saftey harness

working at some height above the ground where you might fall but the rope (or lanyard) that is attached to a strong support or structure would catch you before hitting the ground.

$88,000. What was the total value of the company? One of the partners of Sparky's Electrical Company bought 40 % of the business. The share cost to him was

$220,000

You have just received your paycheck and you see that your gross pay is $320. The withholding tax is $42.15, social security (FICA) is $19.32, and Medicare is $3.36. Your net pay (take-home money) is

$255.17

You make $10.25 per hour. You have 7% % of your total pay taken out of your check for your 401K retirement plan. How much will be taken out for your 401K if you work 47 hours this week? You get paid time-and-a-half for all hours over 40.

$38.82

10.3 uA = A

.00001030

10.3 uA=_ A

.00001030

30.3 uA =_ A

.0000303

.05 mV=V

.00005

.055 mA = _A

.000055

10 A = kA

.01

1 W=mW

1,000

1.3 MΩ = Ω

1,300,000

1.5 k Ω = Ω

1,500

1.705 V= mV

1,705

11,250 watts =kW

11.25

Route A more (additional) feet of conduit are required. as shown in Figure 105.1518, To run from the transformer to the service along Route B instead of along You are going to have to dig a trench and install conduit underground to supply power to the office building

113

12,000 ohms = kohms

12

It has taken a crew 31/2 hours to set 12 unistrut racks on which conduit will be run. If you get two more crews who will work at the same pace, how much time will it take all three crews to hang an additional 132 racks?

12 hours 50 minutes

A general contractor is to be paid $1,132,145. After paying all his subcontractors a total of $978,498 he will still have $ remaining.

153,647

If you are standing on the highest permitted step on a 12-foot step ladder, the top of your head will be about ___feet above the floor. You are 6 feet tall.

16

During an 8-hour work day, the electrician takes two 15-minute rest breaks. The ratio of break time to work time is

1:15

Which of these is smaller? 66.7 % or 2/s

2/3

A Type III ladder is rated to withstand a load of pounds.

200

the NEC, which Article explains the general requirements for a receptacle outlet?

210.50

7.62 meters equals approximately

25 feet

A Type IA ladder is rated to withstand a load of pounds.

300

74. A power pole has been installed 1/2 mile from the property line. This is inches.

31,680

3.5 square yards =square feet

31.5

There are 31 students in a class. 6'-0" in height. Six (6) students are under 5'-2". What is the Eight (8) students are over 6 feet tall. ratio of the number of students under 5'-2" to the Seventeen (17) students are 5'-6" to number of students over 6' tall?

3:4

You timed your apprentice and it took him 21/2 hours to set twenty 2x4 lay-in fixtures. If he continues at this pace, how long will it take him to set another 460 of these fixtures?

57 hours 30 minutes

the federal government the matehing matching contribution. The Your contractor is required to match the amount of to the Feds to pay both yours and the company's amount+ what he withheld from your check. For this week your Medicare/Social Security tax that you pay. He has to pay contractor has to send $ $10.12 per hour and work 40 hours this week Medicare/ Social Security tax = vours + rate is 7.65%. You make contractor s Reminder: Total tax sent to Feds

61.93

Your exam grade accounts accounts for 15% of your grades. This is 70% + 15 % + 15 %= 100 % homework 90 0 40 95 for 70% of your quarterly quarterly grade, and 15% of your quarterly grade. The average of all your homework grades grade is the average of all your pop quiz 0 10 25 48 79 83 pop quizzes 80 20 50 98 0 15 60 100 To the nearest whole number, what is your average grade for the 1" quarter of the school year where you score a 72 on your exam and your homework and pop quiz grades are as shown above.

65

7.3 MΩ =Ω

7,300,000

Rounded off to the nearest tenth, 6.98 is

7.0

25 feet equals approximately ____meters.

7.5

A 1,000 watt heating element will draw amps at 120 volts. The element is rated to operate at 120 volts.

8.33

homework average account for 15% each is 97 % , your pop Your average grade for the 1st quarter of the and pop quiz grades quiz average is 82 % , and your exam accounts for 70% of your grade. 15 % + 15 grade is 84 %? The homework school year is %. Your %+ 70 % 100% and the exam grade

85.7

Square root 81

9

9,872,000 W= MW

9.872

Which of these PPES is a hard hat?

A

What could happen if a hammer with a loose handle is used?

Any of these these

Which of these tools should be used to cut bolts?

Bolt cutter

What is the breaker number and the rating for sub-fed EWR Panel B?

Circuit A27-29 100 Amps

Agreasy or dirty screwdriver handle can lead to an accident because_____.

I or II or III

When using screwdrivers you should always be aware that the screwdriver blade might slip out of the slot and strike you in the_____.

I or II or III

Which of the following can be used to sharpen dull cutting edges of tools?

II. a whetstone II only

What organization actually develops and publishes the National Electrical Code?

National Fire protection Association

It is permitted to use an extension (cheater bar) on a wrench handle under which of the following conditions?

Neither a nor b (never)

Power tools can be carried by the cord if

Never

Power is represented by the letter or symbol

P

is referred to as a stove bolt or machine screw.

Round top with flat head opening and able to put jolt on end

is a bolt mostly used in wood with a domed top and a square under the head. This pulls into the wood as the nut is tightened. Sometimes called a carriage bolt.

Round top with thread to add nut

Which of the fasteners shown below can use a nut as a part of the fastening system?

Rounf top with bolt fastening also has flat head screw opening

As shown on the EWR legend, the designation used to represent weatherproof is shown at

WP

Improper torque can cause

d. all of the above

476,873 watts = kW

d. none of these

The correct flat-blade screwdriver should ______.

flat-blade screwdriver should blade thickness that fits snugly into and reaches the bottom of the screw slot be the same width or slightly narrower than the length of the screw slot I& III only b.

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

increased

Which of the following is (are) considered to be secondary protective devices? safety glasses II. safety goggles III. full face shields

lll оnly

314 kW = watts

none of these

Journeyman # 1 drives 103 miles to work, journeyman # 2 commutes 5 miles, and journeyman # 3 drives 18 miles. Twenty apprentices drive a total of 1460 miles. The total number of miles driven by all the journeymen and apprentice electricians is miles

none of these of

Two particles that are both positively charged will each other.

particles repel

Which materials listed below are good insulators?

water III only