Deck 10: Working Drawings--Upper Level

Question 1

When tabulating materials, take special note of long runs of raceway or cable and determine whether ____ is a problem. This can mean an increase in conductor and/or raceway size.

A)ampacity
B)single-phase supply
C)voltage drop
D)wiring

Answer 1

C

Question 2

A washer-dryer rated for 4000 VA at 208Y/120 volts single-phase must have a branch-circuit ampacity of at least ____ amperes.

A)10
B)20
C)30
D)40

Answer 2

B

Question 3

In the computer room example in this chapter, the grounding terminal of each of the special receptacles is connected to a(n)____.

A)insulated equipment grounding conductor
B)panelboard
C)raceway
D)box

Answer 3

A

Question 4

​Describe basic water heater specifications and those of the beauty salon example in this chapter, and explain the role the electrical contractor in this area.

Question 5

​In the water heater installation example in this chapter, what is the meaning of temperature limiting?

Question 6

In the computer room circuits in the chapter example, three separate neutral conductors are installed to reduce the possibility of a conductor overheating from ____ currents.

A)resistive
B)nonlinear
C)lighting
D)conventional

Question 7

In the insurance office example in this chapter, the reception area has a(n)____ to provide a different "look" for the clients.

A)fan system
B)isolated grounding terminal
C)combination lighting system
D)water heater

Question 8

What steps should you take while tabulating materials to ensure the best possible outcome?

Question 9

​What steps have been taken to make the computer room example in this chapter compliant with good practice?

Question 10

A washer-dryer is rated for 4000 VA at 208Y/120 volts single-phase. The overcurrent protective device must be rated at least ____ amperes.

A)20
B)25
C)40
D)45

Question 11

The ____ feature of a receptacle provides protection from lightning and other severe electrical surges that may occur in the electrical system.

A)surge protection
B)grounding
C)air terminal
D)EMC

Question 12

In the insurance office example in this chapter, a separate, insulated-grounding conductor is installed with the feeder circuit and is connected to the neutral conductor at the service. This grounding system reduces, if not eliminates, the ____ that often is (are)present in the conventional grounding system.

A)neutral conduction
B)electrical glare
C)electromagnetic interference
D)severe electrical surges

Question 13

____ are available in separate units, which can be used to provide protection on any type of sensitive equipment, such as computers and printers .

A)GFCIs
B)Grounders
C)Surge protectors
D)Junction boxes

Question 14

Water heaters are available for commercial occupancies in many sizes and voltages, and for both single and ____ supply.

A)2-phase
B)3-phase
C)4-phase
D)5-phase

Question 15

NEC 422.13 requires that the branch circuit overcurrent device and conductors  for a storage-type electric water heater with a capacity of 120 gallons (450 L)or less must be sized at not less than ____ percent of the rating of the water heater .

A)80
B)100
C)125
D)150

Question 16

In the water heater circuit example in this chapter, the minimum size conductor, if all terminals are rated 75 degrees Celsius or higher, is ____ AWG as the ampacity in NEC Table 310.16 is 85 amperes.

A)4
B)8
C)16
D)32

Question 17

Three-phase circuits result in a smaller ____ than if a 1-phase circuit were installed.

A)current
B)circuit
C)conductor
D)ampacity

Question 18

According to NEC 422.31(B), having a disconnect switch in sight is required if a(n)____ is not readily accessible.

A)locking provision
B)ungrounded conductor
C)surge protection receptacle
D)circuit breaker

Question 19

In the insurance office example in this chapter, a special raceway is installed in the ____. This raceway provides for both electrical power and communications.

A)ceiling
B)two exterior walls
C)floor
D)luminaires

Question 20

Why is surge protection important?