Quiz  /  Illumination Gate & PSU MCQ Questions With Answers

  • 1. 
    The polar curves are used to find out the

  • MHCP
  • MSCP
  • Both (a) and (b)
  • None of these

  • 2. 
    Type of lighting fixture given in pic is

  • Wall Sconge
  • Cove lighting
  • Recessed
  • Pendant

  • 3. 
    If a bright flash light has a light intensity of 25.0 Candela at a distance of 2.00 m from the lens. What is the intensity of the flash light at 75 m away from the lens.

  • 0.0177
  • 35156.25
  • 0.666
  • 937.5

  • 4. 
    KTU Course Code for illumination Technology is

  • EE369
  • EE361
  • EE366
  • EE365

  • 5. 
    Diversity in interior lighting is the ratio of

  • Maximum to minimum illuminance
  • Minimum to maximum illuminance
  • Average to maximum illuminance
  • Average to minimum illuminance

  • 6. 
    Inverse square law is ____ (Assume normal notations)

  • E2 α 1d2E^2\ \alpha\ \frac{1}{d^2}E2 α d21​
  • I α 1d2I\ \alpha\ \frac{1}{d^2}I α d21​
  • I2 α 1d2I^2\ \alpha\ \frac{1}{d^2}I2 α d21​
  • I2 α d2I^2\ \alpha\ d^2I2 α d2

  • 7. 
    MHCP is

  • Mean Hemispherical candle power
  • Mean Horizontal candle power
  • Mean horizontal candle point
  • None of the above

  • 8. 
    Lamp lumen maintenance factor depends on

  • Cleanness of lamp
  • Hours of usage
  • Aging of lamp
  • All the above

  • 9. 
    A light source having an intensity of 1000 candle in all direction is fitted with a reflector so that it directs 75 % of its light flux along a beam having a divergence of 20 degree. What is the total light flux emitted along the beam? What will be the average illumination produced on a surface normal to the beam direction at a distance of 11.5 m?

  • 961.4 lux
  • 323.1 lux
  • 242.0 lux
  • 572.2

  • 10. 
    Human eye is most sensitive to ___ with same intensiy

  • Violet region
  • Green region
  • Reg region
  • Equal sensitivity in all light region

  • 11. 
    Pic shows a problem in lighting - Identify it

  • Glare
  • Shadow
  • Color rendering
  • Stroboscopic effect

  • 12. 
    Type of lighting scheme shown is

  • Direct
  • Indirect
  • Semi indirect
  • Semi direct

  • 13. 
    UGR is stands for

  • Unified Glare Rating

  • 14. 
    According to the first law of illumination, the illumination of a surface due to a source of light is

  • Inversely proportional to the distance between the surface and the source of light
  • Inversely proportional to the square of the distance between the surface and the source of light
  • Directly proportional to the distance between the surface and the source of light
  • Directly proportional to the square of the distance between the surface and the source of light

  • 15. 
    The unit of luminous _flux is

  • steradian
  • candela
  • lumen
  • lux.

  • 16. 
    VCP in connection with glare stands for

  • Visual comfort probability
  • Visual capture probability
  • Very comfortable position
  • Visually correlated probability

  • 17. 
    A fan hanged below the LED light at a Juice store causes irritation to occupants there, technically it is known as

  • Glare
  • Stroboscopic effect
  • Hard shadow
  • Disability glare

  • 18. 
    Candela is the unit of

  • Luminous _flux
  • Luminous intensity
  • Wavelength
  • None of the above

  • 19. 
    Frequency mentioned in definition of 1 Candela is

  • 240 x 10^12 Hz
  • 600 x 10^2 Hz
  • 540 x 10^12 Hz
  • 540 x 10^2 Hz

  • 20. 
    Which is correct in this diagram

  • 1-Illuminance, 2- Lumnous Flux, 3- Luminosity, 4 - Luminous intensity
  • 1- Luminous flux, 2 - Luminous intensity, 3 - Illuminance, 4 - Luminosity
  • 1- Luminous flux, 2- Illuminance, 3 - Luminosity, 4 - Luminous intensity
  • 1- Luminous flux, 2 - Luminosity, 3- Illuminance, 4- Luminous intensity

  • 21. 
    Lambert's cosine law is

  • Eθ2 α EmCosθE_{\theta}^2\ \alpha\ \ E_mCos\thetaEθ2​ α Em​Cosθ
  • Eθ α EmCosθE_{\theta}\ \ \alpha\ \ E_mCos\thetaEθ​ α Em​Cosθ
  • Em α EθCosθE_m\ \ \alpha\ \ \ E_{\theta}Cos\thetaEm​ α Eθ​Cosθ
  • Eθ α Cosθ EmE_{\theta}\ \ \alpha\ \frac{\ \ Cos\theta}{\ E_m}Eθ​ α Em​ Cosθ​
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