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Electrician
Electrician Set-1
Sources of Light
12

Sources of Light MCQ - Electrician (Set-1) with Answers

12) What is the temperature at which a gas filled tungsten filament lamp operates ?

1035 degree C

1200 degree C

1500 degree C

2300 degree C

Answer is:

2300 degree C

Sources of Light MCQ - Electrician (Set-1) with Answers

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Related Sources of Light MCQ - Electrician (Set-1) with Answers

13) When a fluorescent lamp shows a dense blackening at each end, it could possibly mean that the :

gas filled in the lamp was wrong

lamp was started infrequently

starter is working improperly

lamp is new

Answer is:

starter is working improperly

14) The advantage of a preheat fluorescent lamp as compared to incandescent lamp is that it :

has a faster illumination

provides less illumination per watt

generally has a longer life

can be used for heating as well as lighting

Answer is:

generally has a longer life

15) How many lamps of 3 volts rating are required to be connected in series to a supply of 200 V for satisfactory operation ?

67

85

135

33

Answer is:

67

16) The most popular type of fluorescent lamp for new installation is the :

preheat lamp

glow tube

ballast lamp

instant start lamp

Answer is:

glow tube

Sources of Light MCQ - Electrician (Set-1) with Answers

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