ONLINE MCQ EE-ILLUMINATION 1


Q1. What percentage of the input energy is radiated by filament lamps ?
 A.  2 to 5 percent
 [Wrong Answer]
 B.  10 to 15 percent
 [Correct Answer]
 C.  25 to 30 percent
 [Wrong Answer]
 D.  40 to 50 percent
 [Wrong Answer]
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Q2. In lighting circuit using filament lamps 1% voltage drop results into
 A.  no loss of light
 [Wrong Answer]
 B.  1.5 percent loss in the light output
 [Wrong Answer]
 C.  3.5 percent loss in the light output
 [Correct Answer]
 D.  15 percent loss in the light output
 [Wrong Answer]
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Q3. Which of the following instruments is used for the comparison of candle powers of different sources ?
 A.  Radiometer
 [Wrong Answer]
 B.  Bunsen meter.
 [Wrong Answer]
 C.  Photometer
 [Correct Answer]
 D.  Candle meter
 [Wrong Answer]
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Q4. For precision work the illumination ‘level required is of the order of
 A.   500-1000 lumens/m2
 [Correct Answer]
 B.  200-400 lumens/m2
 [Wrong Answer]
 C.   50-100 lumens/m2
 [Wrong Answer]
 D.  10-25 lumens/m2
 [Wrong Answer]
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Q5. Which of the following bulbs operates on least power ?
 A.  GLS bulb
 [Wrong Answer]
 B.  Torch bulb
 [Correct Answer]
 C.  Neon bulb
 [Wrong Answer]
 D.  Night bulb
 [Wrong Answer]
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Q6. Co-efficient of utilisation depends upon
 A.  colour of the walls
 [Wrong Answer]
 B.  colour of ceiling
 [Wrong Answer]
 C.  size of the room
 [Wrong Answer]
 D.  all of the above
 [Correct Answer]
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Q7. In sodium vapour lamp neon gas
 A.  acts as a shield around the filament
 [Wrong Answer]
 B.  assists in developing enough heat to vaporize the sodium
 [Correct Answer]
 C.  change the colour of light
 [Wrong Answer]
 D.  prevents the vaporization of filament
 [Wrong Answer]
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Q8. Candela is the unit of which of the following ?
 A.  Wavelength
 [Wrong Answer]
 B.  Luminous intensity
 [Correct Answer]
 C.  Luminous flux
 [Wrong Answer]
 D.  Frequency
 [Wrong Answer]
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Q9. Which of the following lamps is the ‘cheapest for the same wattage ?
 A.  Fluorescent tube
 [Wrong Answer]
 B.  Mercury vapour lamp
 [Wrong Answer]
 C.  GLS lanip
 [Correct Answer]
 D.  Sodium vapour lamp
 [Wrong Answer]
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Q10. For the same lumen output, the running cost of the fluorescent lamp is
 A.  equal to that of filament lamp
 [Wrong Answer]
 B.  less than that of filament lamp
 [Correct Answer]
 C.  more than that of filament lamp
 [Wrong Answer]
 D.  any of the above
 [Wrong Answer]
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ONLINE MCQ EE-ILLUMINATION 2
सामान्य ज्ञान-पद्म विभूषण,पद्म भूषण,पद्म श्री सम्मान 2017

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