ELECTRICIAN 1st YEAR MODULE – Illumination

Question 1 of 22

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

Direct lighting

Semi-indirect lighting

Indirect lighting

Semi-direct lighting

Question 1 of 22

Question 2 of 22

2. Which lighting design type is glare-free?

Direct

Semi-direct

Semi-indirect

Indirect

Question 2 of 22

Question 3 of 22

3. How is evaporation rate reduced in vacuum bulbs?

Increasing filament resistance

Producing arc in bulb

Reducing filament resistance

Filling with inert gas

Question 3 of 22

Question 4 of 22

4. Which is a cold cathode lamp?

Fluorescent lamp

Neon sign lamp

Mercury vapor lamp

Halogen lamp

Question 4 of 22

Question 5 of 22

5. What is the working temperature of filament lamp?

1500°C

1800°C

2300°C

2000°C

Question 5 of 22

Question 6 of 22

6. What type of lamp is this?

MAT type MV lamp

MA type HPMV lamp

HP metal halide lamp

MB type HPMV lamp

Question 6 of 22

Question 7 of 22

7. What type of reflector is this?

Soft light type

Dispersive type

Mirror type

Parabolic type

Question 7 of 22

Question 8 of 22

8. What is the unit of luminous flux?

Lumen

Lumen/m²

Lux

Candela

Question 8 of 22

Question 9 of 22

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

Lumen

Luminous intensity

Candela

Illuminance

Question 9 of 22

Question 10 of 22

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

300 mA

200 mA

100 mA

50 mA

Question 10 of 22

Question 11 of 22

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

Fluorescent powder

Barium and strontium oxide

Silver oxide

Phosphor powder

Question 11 of 22

Question 12 of 22

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

Luminous intensity

Lumen

Illuminance

Luminous flux

Question 12 of 22

Question 13 of 22

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

Horizontal

Vertical

Inclined

Any position

Question 13 of 22

Question 14 of 22

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

Candela

Lux

Lumen

Steradian

Question 14 of 22

Question 15 of 22

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

Capacitor in series with supply

Capacitor in series with one tube

Two capacitors in series (one per tube)

Capacitor parallel to supply

Question 15 of 22

Question 16 of 22

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

Reduce starting current

Reduce working voltage

Provide initial high voltage ignition

Increase working voltage

Question 16 of 22

Question 17 of 22

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

Sodium vapor

Leak transformer

Arc tube

High pressure aluminum oxide

Question 17 of 22

Question 18 of 22

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

Increase running voltage

Generate high voltage starting pulse

Decrease starting current

Decrease running current

Question 18 of 22

Question 19 of 22

19. What is the unit of luminous efficiency?

Lumen

Lumen/watt

Lumen/m²

Lux

Question 19 of 22

Question 20 of 22

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

Low power consumption

Higher light output

Low operating voltage

High melting point

Question 20 of 22

Question 21 of 22

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

Withstand atmospheric pressure

Reduce UV radiation

Withstand high temperature

Increase lighting effect

Question 21 of 22

Question 22 of 22

22. What is this type of light called?

Flood light

Spotlight

Flash light

Bulk light

Question 22 of 22