Practice test missed 2

Boxes used at luminaire or lampholder outlets in a ceiling shall be designed so that a luminaire or lampholder can be attached and the boxes shall be required to support a luminaire weighing a minimum of _____ lb.

50

The ampacity of 18 TFFN is _____.

6 a

Conductors supplying several motors, or a motor(s) and other load(s), shall have an ampacity not less than the sum of 125 percent of the full-load current rating of the highest rated motor plus the sum of the full-load current ratings of all the other motors in the group and 100 percent of the remaining noncontinuous and continuous nonmotor loads.

False

In a parallel circuit, the voltage drop across each resistance is equal to the sum of the voltage drops of each of the resistors in parallel.

False

The earth generally has low enough impedance to permit sufficient fault current to return to the source, thereby opening the utility's circuit protection device.

False

The neutral conductor of a 3-wire, 120/208V or 277/480V circuit supplied from a 4-wire, three-phase system never carries neutral current.

False

Equipment grounding conductor(s), and not more than _____ fixture wires smaller than 14 AWG shall be permitted to be omitted from the calculations where they enter the box from a domed luminaire or similar canopy and terminate within that box.

Four

Types SE and USE cables and associated fittings shall be _____.

Listed

Bends in FMC shall be made so that the conduit is not damaged and the internal diameter of the conduit is _____.

Not effectively reduced

For other than cord-and-plug-connected portable generators, an emergency shutdown device for a dwelling unit shall be located _____ at a readily accessible location.

Outside of dwelling unit

Materials such as straps, bolts, and so forth, associated with the installation of RMC in wet locations shall be _____.

Protected against corrosion

Motors shall be located so that adequate _____ is provided and so that maintenance, such as lubrication of bearings and replacing of brushes, can be readily accomplished.

Ventilation

In _____, type TC-ER-JP cable containing both power and control conductors that is identified for pulling through structural members shall be permitted.

one- and two- family dwelling units

Snap switches, dimmers, and control switches are considered to be part of the effective ground-fault current path when _____.

the switch is mounted with metal screws to a metal box or a metal cover that is connected to an equipment grounding conductor, or an equipment grounding conductor or equipment bonding jumper is connected to the equipment grounding termination of the snap switch

In general, the minimum size conductor permitted for use in parallel installations is _____.

1/0 awg