Question 1 of 22

1. Which is a cold cathode lamp?

Halogen lamp

Neon sign lamp

Fluorescent lamp

Mercury vapor lamp

Question 1 of 22

Question 2 of 22

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

Inclined

Any position

Horizontal

Vertical

Question 2 of 22

Question 3 of 22

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

Lumen

Luminous intensity

Luminous flux

Illuminance

Question 3 of 22

Question 4 of 22

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

Barium and strontium oxide

Silver oxide

Fluorescent powder

Phosphor powder

Question 4 of 22

Question 5 of 22

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

High pressure aluminum oxide

Sodium vapor

Arc tube

Leak transformer

Question 5 of 22

Question 6 of 22

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

Higher light output

Low operating voltage

High melting point

Low power consumption

Question 6 of 22

Question 7 of 22

7. What is the working temperature of filament lamp?

2000°C

2300°C

1800°C

1500°C

Question 7 of 22

Question 8 of 22

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

Withstand atmospheric pressure

Reduce UV radiation

Increase lighting effect

Withstand high temperature

Question 8 of 22

Question 9 of 22

9. What is the unit of luminous flux?

Lux

Lumen/m²

Lumen

Candela

Question 9 of 22

Question 10 of 22

10. What is the unit of luminous efficiency?

Lumen/m²

Lumen/watt

Lumen

Lux

Question 10 of 22

Question 11 of 22

11. Which lighting design type is glare-free?

Semi-indirect

Direct

Semi-direct

Indirect

Question 11 of 22

Question 12 of 22

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

Luminous intensity

Candela

Lumen

Illuminance

Question 12 of 22

Question 13 of 22

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

200 mA

50 mA

100 mA

300 mA

Question 13 of 22

Question 14 of 22

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

Provide initial high voltage ignition

Increase working voltage

Reduce working voltage

Reduce starting current

Question 14 of 22

Question 15 of 22

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

Semi-direct lighting

Semi-indirect lighting

Indirect lighting

Direct lighting

Question 15 of 22

Question 16 of 22

16. What type of lamp is this?

MA type HPMV lamp

HP metal halide lamp

MAT type MV lamp

MB type HPMV lamp

Question 16 of 22

Question 17 of 22

17. What type of reflector is this?

Parabolic type

Dispersive type

Mirror type

Soft light type

Question 17 of 22

Question 18 of 22

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

Lumen

Steradian

Candela

Lux

Question 18 of 22

Question 19 of 22

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

Capacitor in series with one tube

Capacitor parallel to supply

Capacitor in series with supply

Two capacitors in series (one per tube)

Question 19 of 22

Question 20 of 22

20. How is evaporation rate reduced in vacuum bulbs?

Filling with inert gas

Producing arc in bulb

Reducing filament resistance

Increasing filament resistance

Question 20 of 22

Question 21 of 22

21. What is this type of light called?

Flash light

Flood light

Bulk light

Spotlight

Question 21 of 22

Question 22 of 22

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

Decrease running current

Increase running voltage

Decrease starting current

Generate high voltage starting pulse

Question 22 of 22