500 Best Building Materials MCQ
Q257). Pick up the correct statement from the following:
a).Melamine is obtained from calcium carbide
b).Formaldehyde is prepared synthetically from methane
c).The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
d).The plastics made from melamine formaldehyde resin, are used for electrical insulators
Correct Answer:
The plastics made from melamine formaldehyde resin, are used for electrical insulators
Explanation:
Q258). Steel contains carbon approximately
a).1.50% to 5.6%
b).0.05% to 1.75%
c).0.0025
d).none to these.
Correct Answer:
0.05% to 1.75%
Explanation:
Q259). Cast iron contains carbon approximately
a).1.5% to 5.5%
b).0.05% to 1.75%
c).0.0025
d).none to these.
Correct Answer:
1.5% to 5.5%
Explanation:
Q260). Plastic asphalt is
a).used as a water proofing layer over roof
b).a mixture of cement and asphalt
c).a natural asphalt
d).a refinery product.
Correct Answer:
a mixture of cement and asphalt
Explanation:
Q261). For obtaining vinyl chloride acetate, the method used, is
a).addition polymerization
b).condensation polymerization
c).co-polymerization
d).none of these.
Correct Answer:
co-polymerization
Explanation:
Q262). The yield strength and tensile strength of low carbon steel may be improved by the addition of
a).manganese
b).chromium
c).nickel
d).venadium
Correct Answer:
venadium
Explanation:
Q263). Bitumen completely dissolves in
a).carbon bisulphide
b).chloroform
c).benzol
d).coaltar
Correct Answer:
coaltar
Explanation:
Q264). Good quality cement contains higher percentage of
a).Tricalcium silicate
b).Di-calcium silicate
c).Tri-calcium aluminate
d).Tetra calcium alumino ferrite
Correct Answer:
Tricalcium silicate
Explanation: