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For the following questions answer them individually
Hardness of cementite is of the order of _______BHN.
200
300
400
None of these
Dies and drills and taps contain
Below 0.4% carbon
Below 0.8% carbon
Above 0.9% carbon
Above 2.5% carbon
In cooling tower, water is cooled by the process of
condensation
fusion
evaporation
sublimation
_______ cast iron has the maximum tensile strength.
White
Grey
Nodular
Pig
Water, by evaporative cooling, can theoretically be cooled down to:-
atmospheric temperature
air’s dry bulb temperature
air’s wet bulb temperature
air’s dew point temperature
Ceramic cutting tools are made up of
tungsten carbide
silicon oxide
mixture of oxides of aluminum
_____ structure in obtained if steel is quenched in water
Sorbite
Pearlite
Troostite
Martensite
High speed steel belongs to the category of ______ steel.
alloy
stainless
low carbon
high carbon
______ test is a non-destructive test
Impact
Creep
Radiography
Tensile
Nickel is ______ material.
dielectric
ferroelectric
ferromagnetic
diamagnetic
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