Trivia Quiz On General Lighting Basics! Test Your Knowledge

1. Which of the above images shows a high pressure sodium lamp?

A

B

Image B shows a high pressure sodium lamp. This can be determined by the characteristic yellow-orange glow emitted by high pressure sodium lamps, which is visible in Image B. Image A does not exhibit this glow, suggesting that it is not a high pressure sodium lamp.

Explanation

Image B shows a high pressure sodium lamp. This can be determined by the characteristic yellow-orange glow emitted by high pressure sodium lamps, which is visible in Image B. Image A does not exhibit this glow, suggesting that it is not a high pressure sodium lamp.

2. A foot candle is expressed in units of

Lumens per square foot.

Lumens per square meter.

Candles per square foot.

Candles per square meter.

A foot candle is a unit of measurement that represents the amount of light that falls on a surface. It is defined as the illuminance produced by one lumen of light evenly distributed over an area of one square foot. Therefore, the correct answer is "lumens per square foot" as it accurately describes the unit of measurement for a foot candle.

Explanation

A foot candle is a unit of measurement that represents the amount of light that falls on a surface. It is defined as the illuminance produced by one lumen of light evenly distributed over an area of one square foot. Therefore, the correct answer is "lumens per square foot" as it accurately describes the unit of measurement for a foot candle.

3. A foot candle is a measure of the

Number of candles that would shine the same amount of light as the light source being measured.

Strength of the light measured one foot from the light source.

Amount of light shed in one square foot of area measured at a distance from the light source.

Number of feet away from a light source you are measuring.

The foot-candle is a measure of the amount of light at some distance from the light source. Light measured on a work surface is expressed in foot candles.

Explanation

The foot-candle is a measure of the amount of light at some distance from the light source. Light measured on a work surface is expressed in foot candles.

4. A lumen is a measure of the

Strength of a light source measured at the source.

Power draw of the lamp.

Amount of usable light from a light source.

Amount of light per square foot of a work surface.

The amount of light being emitted by a lamp or bulb is measured at the lamp and expressed in lumens. However, the amount of light reaching the work surface is dependent on many factors including luminaire design.

Explanation

The amount of light being emitted by a lamp or bulb is measured at the lamp and expressed in lumens. However, the amount of light reaching the work surface is dependent on many factors including luminaire design.

5. Which of the following is an example of "horizontal foot candles"?

The amount of light measured on the front of a computer monitor

The amount of light measured at the front of a rack aisle

The amount of light measured on a factory wall

The amount of light measured on a factory floor

When foot-candle readings are taken on a horizontal work surface, the result is expressed as horizontal foot candles. Horizontal foot-candle readings are also taken in roadways, factory aisles, and other locations where people are walking or driving.

Explanation

When foot-candle readings are taken on a horizontal work surface, the result is expressed as horizontal foot candles. Horizontal foot-candle readings are also taken in roadways, factory aisles, and other locations where people are walking or driving.

6. A "lux" is the metric equivalent to the US term

Lumen.

Foot candle.

Candle.

Lumen maintenance.

A "lux" is a unit of measurement for illuminance, which is the amount of light that falls on a surface. The US term equivalent to lux is "foot candle". Both lux and foot candle measure the same thing, but foot candle is the term used in the US while lux is used in the metric system.

Explanation

A "lux" is a unit of measurement for illuminance, which is the amount of light that falls on a surface. The US term equivalent to lux is "foot candle". Both lux and foot candle measure the same thing, but foot candle is the term used in the US while lux is used in the metric system.