INTERNAL COMBUSTION ENGINES QUIZ

A 1000 W bulb fitted with a reflector illuminates an area of 3 m x 3 m with an average illumination of 450 lux. If the bulb has and efficiency of 9 lumens / watt the efficiency of the reflector is

20 %.

70 %.

30 %.

45 %.

TRUE ANSWER : ?
YOUR ANSWER : ?

What will be the total flux emitted by a source of 60 candle power?

0.001326 lumens.

None of these.

60 lumens.

754.2 lumens.

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Wave length for red colour is around

400 nm.

700 nm.

600 nm.

500 nm.

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Which lamp has a negative Colour Rendering Index (CRI)?

Low pressure sodium vapour

LED

Fluorescent

High pressure sodium vapour

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Which lamp is best suited for lighting an International sports arena?

Metal Halide

LED

Incandescent

Compact Fluorescent

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A 200 candle power lamp is hung 4 m above the centre of circular area of 5 m diameter. The illumination at centre of the area is

12.5 lux.

17.5 lux.

18.5 lux.

13.5 lux.

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From a uniform light source having luminous intensity of 300 candelas, there exists a plane surface 15 m below. The value of illuminance at a point on the plane surface where the luminous flux rays are inclined at an angle of 30 to the surface is

58.45 Kilolux.

1.53 lux.

1.15 lux.

17.32 lux.

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What is the work of a driver in case of an LED?

None of these

Both ‘a’ and ‘b’

To convert DC to AC

To convert AC to DC

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Solid angle is expressed in terms of

degree.

radians / meter.

steredians.

radians.

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Total flux or lumens required in any lighting scheme depends inversely on

utilization factor.

None of these

reflection factor.

reduction factor.

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