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Give the reasons why coiled coil
filaments are used. ...........................................
...........................................
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What type of lamp should be used
when it is likely to be exposed to some vibration?
..................................................
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Describe the filament construction
for Rough Service lamps. ..................................................
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The coating of reflector lamps is
of:
silver
tungsten
aluminium
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The spread of the beam of light
from a Reflector lamp is determined by the shape of the:
bulb
lens
cap
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The spread of light produced by a
PAR lamp is determined by the shape of the:
bulb
lens
cap
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