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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? Select one: a. 12/3 AWG b. 8/2 AWG c. 6/3 AWG d. none of these e. any of these

c. 6/3 AWG

One foot equals ___ meters. Select one: a. .3048 b. 3.048 c. 30.48 d. 304.8

a. .3048

What is the smallest THHN/THWN copper conductor that can carry a 21-amp load supplied by a 25-amp circuit breaker where the temperature is 130°F? Don't forget to check the "small conductor" rules in 240.4(D). Select one: a. 10 AWG b. 14 AWG c. 6 AWG d. 12 AWG e. 8 AWG

a. 10 AWG

According to 240.4(D)(5), the smallest copper conductor that can be connected to a 20-A circuit breaker is a ___ AWG. Select one: a. 12 b. 10 c. 14 d. any of these e. none of these

a. 12

Where a branch circuit is protected with a 15-amp circuit breaker, the smallest circuit conductors that can be installed are ___ awg copper. Select one: a. 14 b. 12 c. 10 d. none of these

a. 14

Use the dimensions given on the EWR plan. The floor area of the front bedroom is ___ sq ft. Select one: a. 146 b. 167 c. 135 d. 178

a. 146

Trade size 3/ 4 Schedule 40 PVC (rigid polyvinyl chloride conduit) shall be supported at a minimum of every ___ feet. Select one: a. 3 b. 6 c. 10 d. 5 e. 8

a. 3

Refer to Figure 106.25. When making a 45º saddle, the total shrinkage of the conduit (left-of-center + right-of-center) is ___ inches per inch of saddle depth. Select one: a. 3/ 8 b. 3/ 16 c. 1/ 4 d. 1/ 2 e. none of these

a. 3/ 8

Section ___ of the NEC ® permits nonmetallic outlet and device boxes to be installed with nonmetallic sheathed cable. Select one: a. 314.3 b. 371.4(A) c. 380.2 d. 380.2(B)

a. 314.3

What is the maximum distance permitted between straps (supports) where 12-2 Type AC cable is run for some distance between boxes or enclosures? ___ feet Select one: a. 4 1/ 2 b. 3 c. 10 d. 6

a. 4 1/ 2

Although the 90°C column is permitted to be used for ampacity corrections to Type AC cable with THHN conductors, the NEC ® requires that the ___ column of Table 310.15(B)(16) be used to determine ampacity when used for premises wiring (to determine maximum uncorrected ampacity). Select one: a. 60°C b. 75°C c. 90°C

a. 60°C

EWR Circuit ___ feeds Panel B. Select one: a. A 27-29 b. A 6-8 c. B 27-29 d. A 1-3 e. none of these

a. A 27-29

Knowing that aluminum conductors have a higher resistance than silver-plated copper conductors of the same size and length, which has the higher K value? Select one: a. aluminum b. silver-plated copper

a. aluminum

Which of the following is NOT a standard size circuit breaker (or fuse) per Article 240? Select one: a. 40 b. 55 c. 45 d. 50 e. 60

b. 55

Six 20 watt, 12-volt luminaires (lighting fixtures) 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. Select one: a. 3.39 b. 8.61 c. 10 d. 8.5 e. 12

b. 8.61

When Type AC cable is installed in horizontal runs through the holes in sheet metal studs and joists, do additional supports have to be installed (Caddy clips, for example)?The AC cable is securely fastened within the required distance from any boxes or enclosures and the framing members are on 24-inch centers. Select one: a. Yes b. No

b. No Caddy clips=no

In the international system of units, the prefix milli- means ___. Select one: a. one hundredth b. one thousandth c. one millionth d. one billionth

b. one thousandth

As shown in the legend in EWR Figure 2-9, the electrical symbol "S R" represents a ___. Select one: a. dimmer switch b. variable-speed switch c. reducing speed switch d. three-way switch

b. variable-speed switch

The maximum distance permitted between a box and the first strap (support) for an installation using 1" LFMC (liquidtight flexible metal conduit) is ___ ft. Select one: a. 10 b. 3 c. 1 d. 6 e. 4 1/ 2

c. 1

Generally, no more than ___ outlets can be connected to any one 15 amp 120-volt circuit in this EWR dwelling. Select one: a. 12 b. 13 c. 10 d. not specified

c. 10

Ignoring the effects of voltage drop, a 20-ampere branch circuit requires ___ conductors. Select one: a. 14 AWG copper b. 14 AWG aluminum c. 12 AWG copper d. 12 AWG aluminum

c. 12 AWG copper

According to the NEC ® Index, box fill calculations are covered under Code section ___. Select one: a. 110.28 b. 110.31(B)(1) c. 314.16(B) d. 314.29

c. 314.16(B)

NEC ® Section ___ states the following. Conductors of dissimilar metals shall not be intermixed in a terminal or splicing connector where physical contact occurs between dissimilar conductors (such as copper and aluminum, copper and copper-clad aluminum, or aluminum and copper-clad aluminum), unless the device is identified for the purpose and conditions of use. Select one: a. 210.52 b. 422.10 c. 310.15 d. 110.14

d. 110.14

Refer to Figure 106.22. To make a 9-inch 30º offset, the distance between Points 1 & 2 that you will mark on the conduit is ___ inches. Select one: a. 11 1/ 4 b. 12.6 c. 9 d. 18 e. none of these

d. 18

Per Table 310.104(A), the maximum temperature rating of a THHN conductor is ___°F in a dry location. Select one: a. 140 b. 75 c. 90 d. 194 e. 167

d. 194

100°C = ___°F Select one: a. 56 b. 32 c. 0 d. 212 e. 88

d. 212

Refer to the EWR drawings. What is the size and spacing of the ceiling joists in the workshop? Select one: a. 2×4 @ 12" O.C. b. 2×6 @ 16" O.C. c. 2×8 @ 24" O.C. d. 2×10 @ 16" O.C.

d. 2×10 @ 16" O.C.

According to the NEC ®, what is the largest size of flexible metallic tubing (FMT) that can be used? Select one: a. 4 inch b. 1/ 2 inch c. 1 inch d. 3/ 4 inch

d. 3/ 4 inch

When a single-gang nonmetallic outlet box does not have a clamp or connector, the maximum distance permitted between the box and the first strap in a NM cable installation is ___ inches. Select one: a. 12 b. 18 c. 54 d. 8

d. 8

According to ___ in the NEC ®, unused knockouts and other openings in electrical boxes and cabinets are required to be closed. Select one: a. 312.5(A) b. 110.12(A) c. 314.17(A) d. all of these

d. all of these

EWR's Panel B is mounted ___. Select one: a. in the workshop b. in the garage c. outside on the exterior wall d. in the recreation room e. none of these

d. in the recreation room

Where lines, as shown below, appear on Dwg 9 of the EWR plans, these represent ___ wiring. Select one: a. telephone b. receptacle circuit c. door chime d. switch circuit e. none of these

d. switch circuit

How would 13,800 volts be written in metric notation? Select one: a. 13.8 MV b. .138 KV c. 13.8 mV d. 13.8 µV e. 13.8 kV

e. 13.8 kV

A 45º saddle is to be made in 1 1/ 4" EMT and must pass over a pipe with a 2-inch diameter. The EMT must go over the 2" pipe with a 1/ 4-inch clearance. You should make a mark on the EMT at ___ inches to the left of Point 2 as shown in Figure 106.25. Select one: a. 2 1/ 2 b. 11 1/ 4 c. 7 1/ 2 d. 5 e. 5 5/ 8

e. 5 5/ 8

Horizontal runs of trade size 3 Schedule 40 PVC conduit must be supported at ___ ft intervals. Select one: a. 5 b. 10 c. 7 d. 8 e. 6

e. 6

The multiplier for a 10-degree offset is ___. Select one: a. 1.2 b. 2.6 c. 2.0 d. 1.4 e. 6

e. 6

The overall width of the sliding-glass door in the EWR kitchen is ___. Select one: a. 6'-8" b. 5'-6" c. 6'-0" d. 5'-0" e. 9'-0"

e. 9'-0"

Refer to Figure 106.26. The multiplier is determined from the ___. I. conduit size II. depth of the obstruction III. offset angle Select one: a. I & II only b. II only c. I & III only d. I, II, & III e. III only

e. III only

How thick (finish-to-finish) is a wall if two layers of 5/ 8-inch sheetrock are installed on each side of a 3 5/ 8-inch metal stud wall? Select one: a. 4 7/ 8 b. 2 1/ 2 c. 4 1/ 4 d. 5 1/ 2 e. none of these

e. none of these