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Lighting / Illumination Quiz Questions

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Illumination / Lighting Quiz Questions Answers

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Question 1 of 15

1. Question
1 points
The unit of illumination is:
- Lux
- Lumen
- cd/m²
- Candela
Correct

Incorrect
Question 2 of 15

2. Question
1 points
Candela is the unit of which of the following:
- Illumination
- luminous Intensity
- Luminance
- Light
Correct

Incorrect
Question 3 of 15

3. Question
1 points
The color having longest wave length is:
- Yellow
- Blue
- Orange
- Red
Correct

Incorrect
Question 4 of 15

4. Question
1 points
Which of the following gas is used in filament lamps:
- Carbondioxide
- Argon
- Krypton
- Hydrogen
Correct

Incorrect
Question 5 of 15

5. Question
1 points
Which of the following material is used as filament in the incandescent lamps:
- Tungsten
- Osmium
- Tantalum
- Silver
Correct

Incorrect
Question 6 of 15

6. Question
1 points
A Capacitor is connected across the fluorescent tube circuit in order to:
- Eliminate the loss
- Improves Power factor
- Limits high starting currents
- All the options are correct
Correct

Incorrect
Question 7 of 15

7. Question
1 points
Mercury Vapour lamps gives light of:
- Pink color
- Green color
- Yellow color
- Greenish-blue color
Correct

Incorrect
Question 8 of 15

8. Question
1 points
A Stabilizing Choke is connected in the fluorescent tube circuit so as to:
- Act as ballast and provide voltage impulse during starting
- Reduce the flicker and provides voltage impulse during starting
- Avoid radio interference
- Provides voltage impulse during starting alone
Correct

Incorrect
Question 9 of 15

9. Question
1 points
In electric discharge lamps, light is produced by:
- Magnetic effect of current
- Heating effect of current
- Cathode ray emission
- Ionization in a gas or vapour
Correct

Incorrect
Question 10 of 15

10. Question
1 points
The melting point of Tungsten is about:
- 3400^oC
- 2800^oC
- 2600^oC
- 2400^oC
Correct

Incorrect
Question 11 of 15

11. Question
1 points
Heat from the filament lamp is transmitted to the surroundings mainly through
- Circulation
- Conduction
- Convection
- Radiation
Correct

Incorrect
Question 12 of 15

12. Question
1 points
Filament lamps normally operate at a power factor of:
- 0.5 Lagging
- 0.8 Lagging
- Unity
- 0.85 Leading
Correct

Incorrect
Question 13 of 15

13. Question
1 points
Visible spectrum of light has a wavelength in the range:
- 1000 - 4000 A^o
- 4000 - 7000 A^o
- 7500 - 12500 A^o
- 12500 - 30000 A^o
Correct

Incorrect
Question 14 of 15

14. Question
1 points
The lamp that cannot sustain much voltage fluctuations is:
- Sodium vapour lamp
- Mercury vapour lamp
- Incandescent lamp
- Mercury iodide lamp
Correct

Incorrect
Question 15 of 15

15. Question
1 points
Stroboscopic effect is observed in which of the following:
- Fluorescent lamps
- Incandescent lamps
Correct

Incorrect

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