TMA 3 Exam Questions and Answers
Graded A+
Why is a incandescent lamp filled with inert gas? - Correct answer-Reduce
deterioration of the tungsten filament
GLS lamps are classified according to their lamp-caps. SES means? - Correct
answer-Small Edison Screw
Efficacy is a measure of lamp efficiency. It is measured in lm/W,
lm/W means? - Correct answer-Lumens per Watt
A tungsten-halogen lamp must not be handled by skin oils because? - Correct
answer-Causes hot-spots which cause cracking of the glass
The inside of a low pressure mercury-vapour lamp is coated with phosphors to? -
Correct answer-Convert UV light into visible light
The purpose of a choke is to? - Correct answer-High starting voltage and to limit
the tube's running current
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
Graded A+
Why is a incandescent lamp filled with inert gas? - Correct answer-Reduce
deterioration of the tungsten filament
GLS lamps are classified according to their lamp-caps. SES means? - Correct
answer-Small Edison Screw
Efficacy is a measure of lamp efficiency. It is measured in lm/W,
lm/W means? - Correct answer-Lumens per Watt
A tungsten-halogen lamp must not be handled by skin oils because? - Correct
answer-Causes hot-spots which cause cracking of the glass
The inside of a low pressure mercury-vapour lamp is coated with phosphors to? -
Correct answer-Convert UV light into visible light
The purpose of a choke is to? - Correct answer-High starting voltage and to limit
the tube's running current
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
