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1.The following type of bonding is strongly directional in solids.
Vander Waal’s
Ionic
Metallic
Covalant
2.Fog is an example of colloidal system of
A.solid dispersed in gas.
B.solid dispersed in liquid.
C.liquid dispersed in gas.
D.gas dispersed in liquid.
3.Chromium molybdenum steel can not be welded using __________ welding.
A.thermit
B.electrical resistance
C.oxy-acetylene
D.any of these
3.Speisses is a mixture of the following:
A.Arsenides of heavy metals.
B.Antimonides of heavy metals.
C.Arsenides & antimonides of heavy metals.
D.Iron, cobalt and nickel.
4.Auto collimator is used to check
A.flatness
B.angle
C.rotor balancing
D.roughness
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