Question 1

When 900 lumen falls onto a 2.0 m2 surface from a fluorescent lamp, and a light meter finds that 360 lumen are reflected, the luminance of the surface is:

Accepted Answer

A) 3 
B) 0.71 
C) 0.4 
D) 0.2 
E) 1.25 
A) 3 
B) 0.71 
C) 0.4 
D) 0.2 
E) 1.25 C

Question 2

Which is correct about lighting?

Accepted Answer

A) 1000 lumen/m2 is a very bright indoor illumination level 
B) 1000 lux is a very dull indoor illumination 
C) A typical fluorescent tube emits about one million lumens 
D) Fluorescent lighting does not cast shadows 
E) LED lighting is very energy-inefficient 
A) 1000 lumen/m2 is a very bright indoor illumination level 
B) 1000 lux is a very dull indoor illumination 
C) A typical fluorescent tube emits about one million lumens 
D) Fluorescent lighting does not cast shadows 
E) LED lighting is very energy-inefficient A

Question 3

Light falling onto the surface in a room:

Accepted Answer

A) Some is absorbed and some reflected 
B) Is all absorbed 
C) Is all reflected 
D) Bounces off at same angle as it arrives 
E) Displays the colour of the surface material 
A) Some is absorbed and some reflected 
B) Is all absorbed 
C) Is all reflected 
D) Bounces off at same angle as it arrives 
E) Displays the colour of the surface material A

Question 4

Efficacy of a lamp means?

Accepted Answer

A) Lumens light output per watt of electrical input power to lamp 
B) Efficiency at converting colour temperature into illuminance on the working plane 
C) Percentage of lamp globe or tube surface area that emits light 
D) Proportion of lamp light output directed toward the working plane 
E) Luminous efficacy is total illuminance produced divided by lamp electrical input power including all control equipment consumption 
A) Lumens light output per watt of electrical input power to lamp 
B) Efficiency at converting colour temperature into illuminance on the working plane 
C) Percentage of lamp globe or tube surface area that emits light 
D) Proportion of lamp light output directed toward the working plane 
E) Luminous efficacy is total illuminance produced divided by lamp electrical input power including all control equipment consumption

Question 5

Illumination Intensity is which?

Accepted Answer

A) Lumens 
B) Light level 
C) Illuminance 
D) Lumen/m2 
E) Lumen per watt 
A) Lumens 
B) Light level 
C) Illuminance 
D) Lumen/m2 
E) Lumen per watt

Question 6

What is meant by lamp colour temperature?

Accepted Answer

A) Colour shift in surface caused by the type of lamp 
B) Description of colour-rendering property 
C) Colour of the lamp when viewed directly 
D) Infra-red fraction of the sun produced by the lamp 
E) Calculated average temperature from each of eight wavelength bands in the light produced by a lamp 
A) Colour shift in surface caused by the type of lamp 
B) Description of colour-rendering property 
C) Colour of the lamp when viewed directly 
D) Infra-red fraction of the sun produced by the lamp 
E) Calculated average temperature from each of eight wavelength bands in the light produced by a lamp

Question 7

Which of these correctly describe BZ classification?

Accepted Answer

A) BZ 5 projects only sideways and is used for wall mounted luminaires 
B) BZ 0 means equal spherical illuminance 
C) BZ 10 means light projection all downwards 
D) BZ 10 has a luminaire directing all light output upwards providing only reflection off the ceiling 
E) BZ defines the solid angle projection from a lamp in streradians 
A) BZ 5 projects only sideways and is used for wall mounted luminaires 
B) BZ 0 means equal spherical illuminance 
C) BZ 10 means light projection all downwards 
D) BZ 10 has a luminaire directing all light output upwards providing only reflection off the ceiling 
E) BZ defines the solid angle projection from a lamp in streradians

Question 8

What is an air-handling luminaire?

Accepted Answer

A) Sealed luminaire to keep out moisture 
B) A sealed light fitting inside an air handling unit to allow servicing work 
C) A light fitting open to the room air allowing cooling 
D) Lamp designed for low temperature operation 
E) Luminaire passing air returning to the ductwork system from the conditioned room 
A) Sealed luminaire to keep out moisture 
B) A sealed light fitting inside an air handling unit to allow servicing work 
C) A light fitting open to the room air allowing cooling 
D) Lamp designed for low temperature operation 
E) Luminaire passing air returning to the ductwork system from the conditioned room

Question 9

Which are correct descriptions of lighting system sensor operation?

Accepted Answer

A) People in office workstations cannot be seen by infra-red, microwave and acoustic sensors 
B) Frequent switching of fluorescent lighting does not work 
C) Correctly placed occupancy sensors ensures safe access at all times and fluorescent lamps switch on very quickly 
D) Fluorescent lamps take too long to switch on for automatic sensing systems to work efficiently and people have to walk into a dark room 
E) Unoccupied rooms should not remain without lighting as they are an invitation to burglars 
A) People in office workstations cannot be seen by infra-red, microwave and acoustic sensors 
B) Frequent switching of fluorescent lighting does not work 
C) Correctly placed occupancy sensors ensures safe access at all times and fluorescent lamps switch on very quickly 
D) Fluorescent lamps take too long to switch on for automatic sensing systems to work efficiently and people have to walk into a dark room 
E) Unoccupied rooms should not remain without lighting as they are an invitation to burglars

Question 10

Light system glare means?

Accepted Answer

A) Florescent indoor lighting systems do not cause glare 
B) Whether discomfort is created in a particular viewing direction 
C) Sedentary position includes direct view of sunshine 
D) Impairment of vision due to excessive brightness 
E) All lighting causes glare when viewed directly 
A) Florescent indoor lighting systems do not cause glare 
B) Whether discomfort is created in a particular viewing direction 
C) Sedentary position includes direct view of sunshine 
D) Impairment of vision due to excessive brightness 
E) All lighting causes glare when viewed directly

When 900 lumen falls onto a 2.0 m² surface from a fluorescent lamp, and a light meter finds that 360 lumen are reflected, the luminance of the surface is:

Which is correct about lighting?

Light falling onto the surface in a room:

Efficacy of a lamp means?

Illumination Intensity is which?

What is meant by lamp colour temperature?

Which of these correctly describe BZ classification?

What is an air-handling luminaire?

Which are correct descriptions of lighting system sensor operation?

Light system glare means?

Climate Change

Post Occupancy

Built Environment

Energy Economics

Ventilation and Air Conditioning

Heat Demand

Heating

Water Services

Electrical Installations

Condensation in Buildings

Room Acoustics

Question Bank

Understanding Units

Filters

Exam 10: Lighting

When 900 lumen falls onto a 2.0 m2 surface from a fluorescent lamp, and a light meter finds that 360 lumen are reflected, the luminance of the surface is:

Which is correct about lighting?

Light falling onto the surface in a room:

Efficacy of a lamp means?

Illumination Intensity is which?

What is meant by lamp colour temperature?

Which of these correctly describe BZ classification?

What is an air-handling luminaire?

Which are correct descriptions of lighting system sensor operation?

Light system glare means?

Climate Change

Post Occupancy

Built Environment

Energy Economics

Ventilation and Air Conditioning

Heat Demand

Heating

Water Services

Electrical Installations

Condensation in Buildings

Room Acoustics

Question Bank

Understanding Units

Filters

When 900 lumen falls onto a 2.0 m² surface from a fluorescent lamp, and a light meter finds that 360 lumen are reflected, the luminance of the surface is: