Illumination. Part – 1

1. Which switch used for the stair case wiring?

A. ICTP

B. ICDP

C. Two way switch

D. One way switch

2. Which of the following is not used in domestic electrical wiring?

A. Fuse

B. Oil circuit breaker

C. Lamp holder

D. Switch

3. Which type of supply is required for light and fan circuits?

A. Six phase, six wire

B. Three phase, three wire

C. Three phase, four wire

D. Single phase, two wire

4. A switch is always provided in which wire?

A. Earth wire

B. Neutral wire

C. Phase wire

D. None of these

5. What is the reason of having earth pin thicker and longer in a 3-pin plug?

A. To earth the appliance first

B. To provide low resistance of phase current

C. To increase the voltage

D. None of these

6. Which of the following is not a type of domestic wiring?

A. Conduit wiring

B. Casing – caping wiring

C. Delta wiring

D. Cleat wiring

7. Illumination is measured using which one of the following?

A. Milli volt meter

B. Stroboscope

C. Lux meter

D. Ph meter

8. Standard wattage in fluorescent tube is

A. 25 watt

B. 65 watt

C. 80 watt

D. 100 watt

9. The illumination at various point on horizontal surface illuminated by same source is varies as

A. Cos θ

B. Cos² θ

C. Cos³ θ

D. 1/cos θ

10. The cheapest system of internal wiring is

A. Cleat wiring

B. Conduit wiring

C. Batten wiring

D. Casing-caping wiring