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For the following questions answer them individually
No ceiling fan should be installed at height of less than
2.5M from the floor
5.5 M from the floor
4.5M from the floor
3.5M from the floor
Whatis the function of turbine in hydro powerplant?
Produceelectrical power
produce hydropower
produce heat power
produce mechanical power
Radiantefficiency of a luminous source depends on ______.
Shape of the source
Temperature of the source
Wavelengthoflight rays
All options are correct
To save wastage which lamp is the cheapest?
Sodium vapour lamp
Mercury vapour lamp
Fluorescent tube
GLS lamps
The disadvantage of fluorescent lamps as compared to GLS lamps is _____.
Noise in choke
Stroboscopic effect
High cost
Grayiron is usually welded by
Arc welding
Gas welding
TIG welding
MIC welding
The quantity of heat absorbed from the heater by convection depends upon
The temperature of heating element
The surface area of the heater
The position of the heater
Which ofthe following falls under the category of fusion or non-pressure welding?
Resistance welding
Metal-arc welding
Ultrasonic welding
Explosive welding
Whenanelectron is removed from an atom, it becomes
covalent
positron
molecule
ionised
The donortype of impurity is
phosphorous
aluminium
boron
ron
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