Measuring Light (Leaving Cert Construction Studies): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What does the unit Watt measure in lighting?
What does the unit Watt measure in lighting?
Power consumption
What does the unit Lumen measure?
What does the unit Lumen measure?
Total visible light emitted by source
What does the unit Lux quantify?
What does the unit Lux quantify?
Light reaching & illuminating surface
How many lumens do both a 40W tungsten bulb and 7W fluorescent lamp produce?
How many lumens do both a 40W tungsten bulb and 7W fluorescent lamp produce?
400-500 lumens
What tool measures illumination levels at specific locations?
What tool measures illumination levels at specific locations?
Lux meter
At what height should light measurements be taken for meaningful results?
At what height should light measurements be taken for meaningful results?
0.8-1.0 metres from floor
What is the standard lux value for an overcast sky used in calculations?
What is the standard lux value for an overcast sky used in calculations?
5000 lux
In the degree of efficiency formula, what is the typical window factor (WF)?
In the degree of efficiency formula, what is the typical window factor (WF)?
0.5
What is the typical efficiency coefficient (E) for light loss through glazing?
What is the typical efficiency coefficient (E) for light loss through glazing?
0.4
What size grid squares should be used when creating a light map?
What size grid squares should be used when creating a light map?
One-metre grid squares