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For the following questions answer them individually
The function of inert gas in filament lamp is
increase the illumination
decrease the power consumption
minimize the effect of evaporation during service
decrease the clare
In Which one of the following is flexible wire is not used?
T.V
Table fan
Table light
cement factory
The gas used in gas filed filament lamp
Helium
Oxygen
Nitrogen
Ozone
The output of Tungsten filament lamp depends on
Size of lamp
Size of shell
Temperature of filament
All options are correct
In arc welding the voltage on AC supply system is in the range
1000-1200V
400-500V
200-250 V
70 - 1000V
Which of the following is not a welding accessory ?
Electrode holder
Hand screen
Cable
Gloves
The temperature inside a furnace is usually measured by
Mercury thermometer
Optical pyrometer
Alcohol thermometer
Any of the options is correct
In electric resistance welding
The current required exceeds 100A
The voltage required ranges from 4 to 12 V
The amount of power supplied to the weld usually ranges from 60 watts to 80 watts for each square mm of area.
Which of the following is a trivalent?
Boron
Aluminium
Indium
Which of the following are immobile?
Electrons
Holes
Ions
None of these
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