Nccer electrical level 2 module 3 Latest Update

Nccer electrical level 2 module 3 Latest Update

• Questions and 100%

Verified Correct Answers Guaranteed A+

chandeliers are a type of - CORRECT ANSWER: suspended lighting fixture

Compared to standard incandescent lamps, which of the following provides longer life

and improved light quality when used in a lamp - CORRECT ANSWER: halogen gas

fluorescent lamps with a single pin at each end are known as - CORRECT ANSWER:

instant-start lamps

In an office where people sit quietly at desks from 8:30 a.m. to 5:00 p.m., Which type of lighting control would be most efficient in turning off the lights when they were not

needed? - CORRECT ANSWER: timer

Light enters the eye through a transparent layer called the - CORRECT ANSWER:

cornea

NEC Article 410 contains requirements for installing - CORRECT ANSWER: recessed

lighting fixtures

NEC requirements must be adhered to when installing incandescent recessed lighting fixtures because they - CORRECT ANSWER: are a fire hazard if installed incorrectly

The junction box and recessed lighting fixture should be separated by a minimum

distance of - CORRECT ANSWER: 1'

The type of high-intensity discharge (HID) lamp that has excellent color rendition is the -

CORRECT ANSWER: metal halide lamp

Ultrasonic occupancy sensors are triggered by - CORRECT ANSWER: motion

Unless it is protected or is a low-voltage type of track, track lighting on a wall must be

installed at least - CORRECT ANSWER: 5' above the floor

when installing a surface-mounted fixture weighing more than 50 pounds, it -

CORRECT ANSWER: can be supported by the outlet box if the box is designed and

marked to support more than 50 pounds.

when used outdoors, photo sensors should be aimed due - CORRECT ANSWER: north

when white light is passed through a prism, how many total colors are visible -

CORRECT ANSWER: 6 1 / 2

Which color temperature produces produces a balance between warmth and coolness -

CORRECT ANSWER: 3,5000k

which lamp produces a cool color tone? - CORRECT ANSWER: Daylight-simulating

fluorescent

which of the following are often used in conjunction with time clocks to turn off lighting

when it is no longer needed? - CORRECT ANSWER: photo sensors

which of the following contain ballasts that provide high voltage across the lamp's electrodes at startup, causing then to emit electrons? - CORRECT ANSWER: instant- start lamps

which of the following describes a color temperature 4,100k and higher - CORRECT

ANSWER: cool in tone with a bias toward blue and greens

which of the following is an HD ballast category? - CORRECT ANSWER: constant

wattage autotransformer

which of the following materials absorbs the most light? - CORRECT ANSWER: Dark

red glazed bricks

Which of the following should be at least 18' in length when used to connect a junction box mounted above a suspended ceiling to a fixture installed in a suspended ceiling? -

CORRECT ANSWER: Fixture whip

which of the following will shorten the life of a filament in an incandescent lamp? -

CORRECT ANSWER: operating at warmer temperature

Which section of the NEC requires that at least 6" of free conductor length be left at each outlet box when cutting the branch circuit wires in preparation for connecting a

light fixture? - CORRECT ANSWER: NEC Section 300.14

Which type of ballast has the highest efficiency - CORRECT ANSWER: Electronic

instant-start A light that is considered warm in town is produced by lamps with color temperatures of

- CORRECT ANSWER: 3,000K and less

A measure of how a lamp maintains its light output over time. - CORRECT ANSWER:

lumen maintainence

A measurement of the way a light source reproduces color - CORRECT ANSWER:

Color Rendering Index

• / 2