Chapter 9 Flashcards

1
Q

Double-throw knife switches mounted vertically shall be equipped with a locking device to prevent ___ from closing the blades.

A

gravity

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2
Q

In general, only ungrounded conductors shall be opened by switches.

A

True

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3
Q

All panelboard cabinets and frames of panelboards shall be connected to an EGC.

A

True

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4
Q

Snap switch terminals marked CO/ALR are for use with ___ conductors.

A

aluminum, copper, copper-clad aluminum, all the above

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5
Q

A(n) ___ is an overcurrent protective device with a mechanical mechanism that may manually or automatically open the circuit when an overload condition or short circuit occurs.

A

Circuit-breaker

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6
Q

Conduits or other raceways including their fittings shall not rise more than ___” above the bottom of switchgear, switchboards, or floor-mounted panelboards.

A

3”

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7
Q

A space of not less than ___’ shall be provided between the top of a switchboard and a combustible ceiling.

A

3”

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8
Q

The arrangement of busbars and conductors in switchgear or a switchboard shall be such as to avoid overheating due to ___ effects.

A

inductive

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9
Q

The two types of wire termination configurations for calculating wire-bending space are ___.

A

L and S

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10
Q

A(n) ___ is a large single panel, frame, or group of assembled panels with buses, overcurrent devices, and instruments.

A

switchboard

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11
Q

Panelboards supplied through transformers generally shall have their overcurrent protection located on the ___ side of the transformer.

A

secondary

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12
Q

A surface-mounted switch installed in a wet location shall be enclosed in a(n) ___ enclosure.

A

weatherproof

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13
Q

Cabinets or cutout boxes installed in a wet location shall be spaced ___” off the wall to which it is mounted.

A

1/4”

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14
Q

The center of the grip of the operating handle of a knife switch, when in the highest position, shall not be more than ___ above the floor or working platform.

A

6ft 7in

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15
Q

An identified ___ is required to be securely installed between adjacent snap switches rated over 300 V.

A

barrier

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16
Q

In general, only ungrounded conductors shall be opened by switches.

A

True

17
Q

Switchgear, switchboards, and panelboards are installed to control light and power circuits.

A

True

18
Q

A(n) ___ is a single panel or group of assembled panels with buses and overcurrent devices, which may have switches to control light, heat, or power circuits.

A

panelboard

19
Q

In general, vertically mounted switches shall be ___ in the up position.

A

on

20
Q

The neutral of an electrical system is always carrying the unbalanced current of that system.

A

True

21
Q

A(n) ___ is a device, with a current and voltage rating, used to open or close an electrical circuit.

A

switch