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Multiple Choice Question (MCQ) of Illumination page-1


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1. Which of the following will need the highest level of illumination ?

A) Railway platforms
B) Hospital wards
C) Bed rooms
D) Proof reading.

Ans : (D)


2. Which of the following will need lowest level of illumination ?

A) Auditoriums
B) Railway platform
C) Fine engraving
D) Displays.

Ans : (B)


3. Which of the following lamp gives nearly monochromatic light ?

A) Sodium vapour lamp
B) GLS lamp
C) Tube light
D) Mercury vapour lamp.

Ans : (A)


4. Radiant efficiency of the luminous source depends on

A) shape of the source
B) temperature of the source
C) wavelength of light rays
D) all of the above.

Ans : (B)


5. Carbon arc lamps are commonly used in

A) photography
B) cinema projectors
C) street lighting
D) domestic lighting.

Ans : (B)


6. The unit of solid angle is

A) steradian
B) candela
C) radian
D) solid angle.

Ans : (A)


7. The illumination level in houses is in the range

A) 10 - 20 lumen/m2
B) 30 - 50 lumen/m2
C) 40 - 75 lumen/m2
D) 100 - 140 lumen/m2

Ans : (D)


8. Luminous efficiency of a fluorescent tube is

A) 5 - 10 lumen/watt
B) 15 - 20 lumen/watt
C) 30 - 40 lumen/watt
D) 60 - 65 lumen/watt.

Ans : (D)


9. One lumen per square meter is the same as

A) One lux
B) One candela
C) One foot candle
D) One lumen meter.

Ans : (A)


10. Standard wattage of 3 ft. Fluorescent tube is

A) 10 W
B) 40 W
C) 65 W
D) 100 W.

Ans : (B)



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