Question 1 of 22

1. Which lighting design type is glare-free?

Semi-indirect

Semi-direct

Direct

Indirect

Question 1 of 22

Question 2 of 22

2. What type of lamp is this?

MB type HPMV lamp

MA type HPMV lamp

MAT type MV lamp

HP metal halide lamp

Question 2 of 22

Question 3 of 22

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

Increase lighting effect

Withstand atmospheric pressure

Withstand high temperature

Reduce UV radiation

Question 3 of 22

Question 4 of 22

4. Which is a cold cathode lamp?

Fluorescent lamp

Mercury vapor lamp

Neon sign lamp

Halogen lamp

Question 4 of 22

Question 5 of 22

5. What is the working temperature of filament lamp?

1800°C

1500°C

2300°C

2000°C

Question 5 of 22

Question 6 of 22

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

Sodium vapor

High pressure aluminum oxide

Leak transformer

Arc tube

Question 6 of 22

Question 7 of 22

7. What is the unit of luminous flux?

Candela

Lumen/m²

Lumen

Lux

Question 7 of 22

Question 8 of 22

8. What is this type of light called?

Spotlight

Bulk light

Flash light

Flood light

Question 8 of 22

Question 9 of 22

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

Illuminance

Lumen

Candela

Luminous intensity

Question 9 of 22

Question 10 of 22

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

Steradian

Candela

Lumen

Lux

Question 10 of 22

Question 11 of 22

11. How is evaporation rate reduced in vacuum bulbs?

Producing arc in bulb

Filling with inert gas

Reducing filament resistance

Increasing filament resistance

Question 11 of 22

Question 12 of 22

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

Reduce working voltage

Increase working voltage

Reduce starting current

Provide initial high voltage ignition

Question 12 of 22

Question 13 of 22

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

Illuminance

Lumen

Luminous intensity

Luminous flux

Question 13 of 22

Question 14 of 22

14. What type of reflector is this?

Dispersive type

Soft light type

Mirror type

Parabolic type

Question 14 of 22

Question 15 of 22

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

Fluorescent powder

Silver oxide

Barium and strontium oxide

Phosphor powder

Question 15 of 22

Question 16 of 22

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

Capacitor in series with one tube

Capacitor in series with supply

Capacitor parallel to supply

Two capacitors in series (one per tube)

Question 16 of 22

Question 17 of 22

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

Decrease starting current

Generate high voltage starting pulse

Decrease running current

Increase running voltage

Question 17 of 22

Question 18 of 22

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

Semi-direct lighting

Indirect lighting

Semi-indirect lighting

Direct lighting

Question 18 of 22

Question 19 of 22

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

Any position

Vertical

Horizontal

Inclined

Question 19 of 22

Question 20 of 22

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

200 mA

100 mA

50 mA

300 mA

Question 20 of 22

Question 21 of 22

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

High melting point

Higher light output

Low operating voltage

Low power consumption

Question 21 of 22

Question 22 of 22

22. What is the unit of luminous efficiency?

Lumen/watt

Lux

Lumen/m²

Lumen

Question 22 of 22