ILLUMINATION - Practice Mode

1) How stroboscopic effect in industrial twin tube light fitting is reduced?

Connecting capacitor parallel to supply Connecting capacitor in series with supply Connecting capacitor in series with one tube light Connecting two capacitors in series to each tube light

Correct Answer: Connecting capacitor in series with one tube light

2) Which term refers that the flow of light into a plane surface?

Lumen Illuminance Luminous flux Luminous intensity

Correct Answer: Illuminance

3) What is the purpose of ignitor in high pressure sodium vapour lamp circuit?

Decreases the starting current Increases the running voltage Decreases the running current Generates high voltage pulse at starting

Correct Answer: Generates high voltage pulse at starting

4) Which type of light fitting design has free from glare?

Semi direct type Semi indirect type Direct lighting type Indirect lighting type

Correct Answer: Semi indirect type

5) Why the outer tube of a high pressure metal halide lamp made of boro silicate glass?

Increase the lighting effect Withstand heavy temperatu Withstand atmospheric pressure Reduce the ultra violet radiation from lamp

Correct Answer: Reduce the ultra violet radiation from lamp

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