# Lighting System MCQ Questions

Top 10 Questions on Lighting Systems.

## Luminous intensity is measured in

Luminous intensity is measured in:

1. Kelvin
2. Candelas
3. Illumine
4. Degrees

One lumen equals

## The quantity of light emitted by a source is

The quantity of light emitted by a source is:

1. candelas
2. luminous flux
3. foot-candle
4. None of above

## Sunlight at the earth’s surface has a color temperature ranging between

Sunlight at the earth’s surface has a color temperature ranging between:

1. 2200 K and 3500 K
2. 3500 K and 5500 K
3. 5500 K and 6500 K
4. Above 6500 K

Correct answer: 3. 5500 K and 6500 K

## The temperature of a blackbody source that would emit light of that given wavelength is given the name

The temperature of a blackbody source that would emit light of that given wavelength is given the name:

1. candelas
2. luminous flux
3. Color temperature
4. All of above

## Lighting system color temperature is measured in

Lighting system color temperature is measured in:

1. Kelvin
2. Candelas
3. Illumine
4. Degrees

## Warm color in lighting systems refers to

Warm color in lighting systems refers to:

1. 2700–3300 K
2. 3300–4000 K
3. 4000–5000 K
4. 5000–6500 K

## Cool color in lighting systems refers to

Cool color in lighting systems refers to:

1. 2700–3300 K
2. 3300–4000 K
3. 4000–5000 K
4. 5000–6500 K

## The measure of the efficiency of producing visible light is best described as

The measure of the efficiency of producing visible light is best described as:

1. Kelvin
2. Candelas
3. Efficacy
4. Degrees

## The function of a ballast in florescent lamp is to

The function of a ballast in florescent lamp is to

1. Control voltage for starting
2. Current limitation
3. Both of these
4. None of these

Correct answer: 3. Both of these

## Physical cutoff for outdoor luminaires is defined as the

Physical cutoff for outdoor luminaires is defined as the:

1. Angle measured from the nadir, to the point where the lamp is fully occluded
2. Angle measured from the nadir to the point where reflection of the lamp in the luminaire’s reflector is fully occluded
3. Angle measured from the horizontal at which the lamp is just visible
4. None of these

Correct answer: 1. Angle measured from the nadir, to the point where the lamp is fully occluded