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CHAPTER-1.6 ( Illumination )
CH1.6--------------------TEST-6
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Q1. Reduction factor in illumination is?
1 point
(a) MSCP/MHCP
(b) MHCP/MSCP
(c) 1/MHCP/1
(d) 1/MSCP/1
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Q2. In illumination what is lamp efficiency?
1 point
(a) Lumen-watt
(b) Lumens/watt
(c) Total flux in lumen/2π
(d) Total flux in Lumen/4π
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Q3. Which is a cold cathode lamp?
1 point
(a) Neon lamp
(b) Fluorescent lamp
(c) Mercury vapor lamp
(d) Sodium vapor lamp
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Q4. Name of the fluorescent materials for fluorescence of green colour?
1 point
(a) Zinc silicate + manganese
(b) Zinc sulphide + manganese
(c) Zinc sulphide + silver
(d) Calcium silicate + manganese
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Q5. Illumination level required for precision work is around?
1 point
(a) 50 lm/m2/50
(b) 100 lm/m2/100
(c) 200 lm/m2/200
(d) 500 lm/m2/500
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Q6. Which of the following will need lowest level of illumination?
1 point
(a) Displays
(b) Fine engraving
(c) Railway platform
(d) Auditoriums
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Q7. Which of the following statement is correct?
1 point
(a) Light is a form of heat energy
(b) Light is a form of electrical energy
(c) Light consists of shooting particles
(d) Light consists of electromagnetic wave
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Q8. Luminous efficiency of a florescent tube is
1 point
(a) 10 lumens/watt
(b) 20 lumens/watt
(c) 40 lumens/watt
(d) 60 lumens/watt
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Q9. A solid angle is expressed in terms of
1 point
(a) radians/meter
(b) radians
(c) steradians
(d) degree
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Q10. In houses the Illumination is in the range of
1 point
(a) 2-5 lumens/watt
(b) 10-20 lumens/watt
(c) 35-45 lumens/watt
(d) 60-65 lumens/watt
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