Question 1 of 22

1. Which is a cold cathode lamp?

Neon sign lamp

Mercury vapor lamp

Fluorescent lamp

Halogen lamp

Question 1 of 22

Question 2 of 22

2. Which lighting design type is glare-free?

Direct

Indirect

Semi-direct

Semi-indirect

Question 2 of 22

Question 3 of 22

3. What type of lamp is this?

MAT type MV lamp

HP metal halide lamp

MA type HPMV lamp

MB type HPMV lamp

Question 3 of 22

Question 4 of 22

4. What is the unit of luminous efficiency?

Lumen/m²

Lumen/watt

Lux

Lumen

Question 4 of 22

Question 5 of 22

5. What is the purpose of ignitor in high pressure sodium vapour lamps?

Decrease starting current

Decrease running current

Increase running voltage

Generate high voltage starting pulse

Question 5 of 22

Question 6 of 22

6. What is the unit of luminous flux?

Lumen/m²

Lux

Candela

Lumen

Question 6 of 22

Question 7 of 22

7. Which lighting system is used for flood and industrial lighting?

Semi-indirect lighting

Direct lighting

Semi-direct lighting

Indirect lighting

Question 7 of 22

Question 8 of 22

8. How is stroboscopic effect reduced in industrial twin tube light fittings?

Capacitor parallel to supply

Two capacitors in series (one per tube)

Capacitor in series with supply

Capacitor in series with one tube

Question 8 of 22

Question 9 of 22

9. What type of reflector is this?

Soft light type

Parabolic type

Dispersive type

Mirror type

Question 9 of 22

Question 10 of 22

10. Which material is coated on tungsten electrode in fluorescent tube lamps?

Phosphor powder

Silver oxide

Fluorescent powder

Barium and strontium oxide

Question 10 of 22

Question 11 of 22

11. What is the function of leak transformer in high pressure sodium vapour lamp circuit?

Reduce starting current

Provide initial high voltage ignition

Increase working voltage

Reduce working voltage

Question 11 of 22

Question 12 of 22

12. What is the main advantage of coiled coil lamps?

Low power consumption

Low operating voltage

Higher light output

High melting point

Question 12 of 22

Question 13 of 22

13. What is the working temperature of filament lamp?

2000°C

2300°C

1500°C

1800°C

Question 13 of 22

Question 14 of 22

14. Which term refers to light flow on a plane surface?

Lumen

Illuminance

Luminous intensity

Luminous flux

Question 14 of 22

Question 15 of 22

15. What is the current capacity of flasher if current is 100mA per row?

200 mA

300 mA

50 mA

100 mA

Question 15 of 22

Question 16 of 22

16. Which device provides ignition voltage and acts as choke in HPSV lamps?

Sodium vapor

High pressure aluminum oxide

Leak transformer

Arc tube

Question 16 of 22

Question 17 of 22

17. What term refers to luminous flux per unit solid angle from a light source?

Illuminance

Candela

Luminous intensity

Lumen

Question 17 of 22

Question 18 of 22

18. How is evaporation rate reduced in vacuum bulbs?

Reducing filament resistance

Producing arc in bulb

Filling with inert gas

Increasing filament resistance

Question 18 of 22

Question 19 of 22

19. Why is the outer tube of high pressure metal halide lamp made of borosilicate glass?

Withstand high temperature

Withstand atmospheric pressure

Increase lighting effect

Reduce UV radiation

Question 19 of 22

Question 20 of 22

20. In which position are MB type high pressure mercury vapour lamps operated?

Inclined

Horizontal

Vertical

Any position

Question 20 of 22

Question 21 of 22

21. What is this type of light called?

Flood light

Flash light

Bulk light

Spotlight

Question 21 of 22

Question 22 of 22

22. What is the S.I unit of luminous intensity?

Steradian

Lumen

Lux

Candela

Question 22 of 22