ONLINE MCQ EE-ILLUMINATION 1
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Attempt Free ONLINE MCQ EE-ILLUMINATION 1 Here. Read The Important Electrical MCQ From Below.
Q1. What percentage of the input energy is radiated by filament lamps ?
A. 2 to 5 percent
B. 10 to 15 percent
C. 25 to 30 percent
D. 40 to 50 percent
Ans. B
Q2. In lighting circuit using filament lamps 1% voltage drop results into
A. no loss of light
B. 1.5 percent loss in the light output
C. 3.5 percent loss in the light output
D. 15 percent loss in the light output
Ans. C
Q3. Which of the following instruments is used for the comparison of candle powers of different sources ?
A. Radiometer
B. Bunsen meter.
C. Photometer
D. Candle meter
Ans. C
ONLINE MCQ EE-ILLUMINATION 1
Q4. For precision work the illumination ‘level required is of the order of
A. 500-1000 lumens/m2
B. 200-400 lumens/m2
C. 50-100 lumens/m2
D. 10-25 lumens/m2
Ans. A
Q5. Which of the following bulbs operates on least power ?
A. GLS bulb
B. Torch bulb
C. Neon bulb
D. Night bulb
Ans. B
Q6. Co-efficient of utilisation depends upon
A. colour of the walls
B. colour of ceiling
C. size of the room
D. all of the above
Ans. D
ONLINE MCQ EE-ILLUMINATION 1
Q7. In sodium vapour lamp neon gas
A. acts as a shield around the filament
B. assists in developing enough heat to vaporize the sodium
C. change the colour of light
D. prevents the vaporization of filament
Ans. B
Q8. Candela is the unit of which of the following ?
A. Wavelength
B. Luminous intensity
C. Luminous flux
D. Frequency
Ans. B
Q9. Which of the following lamps is the ‘cheapest for the same wattage ?
A. Fluorescent tube
B. Mercury vapour lamp
C. GLS lanip
D. Sodium vapour lamp
Ans. c
Q10. For the same lumen output, the running cost of the fluorescent lamp is
A. equal to that of filament lamp
B. less than that of filament lamp
C. more than that of filament lamp
D. any of the above
Ans. C
ONLINE MCQ EE-ILLUMINATION 1
