Contract Documents

Question 1

Where should air supply diffusers and registers be located?

Answer 1

Near windows or other heat loss sources or heat gain

Question 2

Where should return air grilles be placed?

Answer 2

Away from supply points (facilitates heat and air circulation throughout the space)

Question 3

What is a diffuser?

Answer 3

A device used to direct air supply by angled blades

Question 5

What are the 3 types of diffusers?

Answer 5

lourve bladed, straight bladed, and linear slot

Question 6

What is a grille?

Answer 6

A device used to supply or extract air without any deflection

Question 7

What are the 3 types of grilles?

Answer 7

egg crate, bar type, and transfer type

Question 8

How many Kelvins is natural daylight?

Answer 8

9,000K very cool blue

Question 9

the ___ the color temp, the ___ the light will appear

Answer 9

lower, warmer

Question 10

What is used to describe the color temperature of non-incandescent lights?

Answer 10

CCT (correlated color temperature)

Question 11

____ refers to the way colors appear when viewed under a given light source.

Answer 11

Color rendering

Question 12

What’s the CRI of a lamp type?

Answer 12

0-100 (0=poor; 100=best color quality)

Question 13

What CRI is typically acceptable?

Answer 13

80 or higher

Question 14

What lamp type generates light when an electric current heats the tungsten filament inside?

Answer 14

incandescents

Question 15

What’s the typical color of an incandescent?

Answer 15

warm white (2700K) / high CRI for rendering natural color and skin tones

Question 16

Downside to incandescent?

Answer 16

poor efficacy

Question 17

What lamp type is bright but hot, cheaper upfront but costs more to operate, shorter lamp life, can be dimmed?

Answer 17

Halogen

Question 18

What lamp type is energy-efficient, minimal heat, typically brighter than LEDs, but has harsher whiter colored light? Not dimmable without special housing and switching. Suitable for commercial spaces where the light stays on.

Answer 18

Fluorescent

Question 19

What lamp type requires a larger-sized transformer to “step down” the voltage from 120 to 12 volts? They tend to be smaller in size and have more beam control.

Answer 19

low voltage (incandescent like MR16)

Question 20

What lamp type has a long life, low energy use, lower operating costs but are currently more expensive upfront? They have low heat output and a relatively cool bluish light. Some are dimmable, but this requires a special dimmer.

Answer 20

LED

Question 21

What lamp type is most often used for outdoor lighting or large indoor spaces, like warehouses? They generate light by passing an electric current through a gas. That current then produces an arc of light within the arc tube. Requires ballast.

Answer 21

High-intensity discharge (HID)

Question 22

What are different types of HIDs?

Answer 22

High-Pressure Sodium (HPS), Mercury Vapor, Metal Halide, and Ceramic Metal Halide

Question 23

What lamp type is an incandescent fixture with xenon gas have warmer light and give off more heat? They are dimmable but not energy efficient and have a lamp life similar to fluorescent, but not as long as LED.

Answer 23

Xenon

Question 24

The units used for the measurement and description of the brightness of a direct glare source are

Answer 24

candela per square meter

Question 25

___ describe brightness either reflected or transmitted from a source or surface (luminance), and account for the projected area (i.e., only the area that you see when looking at the source). It is measured in candela per square meter.

Answer 25

foot lamberts

Question 26

The amount of light output produced by a lamp or light source; this is how lamp manufacturers rate their lamps and publish catalogs with this information:

Answer 26

Lumens