17th
Apr
Illumination MCQ

Illumination MCQ

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  • 17th Apr, 2021
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Illumination MCQ Question and Answer

Following are mostly asked Illumination MCQ test that are designed for professionals like you to crack you interviews. You can take this Illumination online test before appearing to you real interview. This Illumination quiz there are around 30+ multiple choice questions on Illumination with four options.

1) The Perfect diffuser surface is one that

  • A. Difuses all the incident light
  • B. Absorbs all the incident light
  • C. Transmits all the incident light
  • D. All of the above

2) Candle power is

  • A. The light radiating capacity of a source in a given direction
  • B. The luminous flux emitted by the source per unit solid angle
  • C. Either A or B
  • D. None of the above

3) Glare is caused due to

  • A. Excessive lighting contrast in the field of vision
  • B. Excessive luminance
  • C. Either A or B
  • D. None of the above

4) In sodium vapour discharge lamp the neon gas

  • A. Prevents vaporisation of filament
  • B. Assists in developing enough heat to vaporised the sodium
  • C. Changes the colour of light
  • D. Acts as a shield around the filament

5) An auto transformer used with a sodium vapour lamp should have

  • A. High resistance
  • B. High step up ratio
  • C. High resistance
  • D. High leakage reactance
Download Free : Illumination MCQ PDF

6) Carbon arc lamps are commonly used in

  • A. Photography
  • B. Street lighting
  • C. Domestic lighting
  • D. Cinema Projector

7) The unit of solid angle is

  • A. Radian
  • B. Candela
  • C. Steradian
  • D. Solid Angle

8) The unit of luminous flux is

  • A. Lux
  • B. Lumen
  • C. Candela
  • D. Steradian

9) Which of the following will needs the highest level of illumination?

  • A. Bed Room
  • B. Hospital wards
  • C. Proofreading
  • D. Railway platforms

10) The Principle of the Simple photometer is based upon

  • A. Square Law
  • B. Inverse Law
  • C. Inverse Square Law
  • D. Lambert cosine Law

11) Radiant efficiency of the luminous source depends on

  • A. temperature of the source
  • B. shape of the source
  • C. wavelength of light rays
  • D. All of the above

12) The color temperature of day light is around

  • A. 6000 K.
  • B. 600 K
  • C. 160 K
  • D. 50 K

13) Which of the following lamp gives nearly monochromatic light ?

  • A. GLS lamp
  • B. Tube light
  • C. Mercury vapor lamp.
  • D. Sodium vapor lamp

14) One lumen per square meter is the same as

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

15) In a fluorescent tube circuit, choke acts as

  • A. The power factor improving device
  • B. Current limiting device
  • C. Source of heat
  • D. Starter

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