500 Best Building Materials MCQ
Q209). When a brick is immersed in water for 24 hours and then dried, if
a).no grey or white deposits appear on the surface, the brick is free from soluble salts
b).10 per cent surface is covered with grey or white deposits, the brick has slight efflorescence
c).50 per cent surface is covered with grey or white deposits, the brick has serious efflorescence
d).All the above.
Correct Answer:
All the above.
Explanation:
Q210). In arches, stratified stones are placed so that their planes are
a).parallel
b).perpendicular
c).radial
d).none of these.
Correct Answer:
radial
Explanation:
Q211). Pick up the correct statement from the following:
a).Acid test is done to find out the weathering quality of stones
b).Attrition test is done to find out the rate of wear of stones which are used in road construction
c).Crushing test is done to find out the compressive strength of the stone
d).All the above.
Correct Answer:
All the above.
Explanation:
Q212). The fire clay contains pure
a).lime
b).oxide of iron
c).hydrated aluminium silicate
d).magnesium.
Correct Answer:
hydrated aluminium silicate
Explanation:
Q213). Pick up the correct characteristic of Pyroxene from the following:
a).It forms octagonal crystals
b).It converts to chlorine by hydration
c).Its density is 2.3 to 3.6 g/cm
d).All the above.
Correct Answer:
All the above.
Explanation:
Q214). For sanitary pipes and chemical stonewares,
a).salt glazing is used
b).lead glazing is used
c).opaque glazing is used
d).None of these.
Correct Answer:
salt glazing is used
Explanation:
Q215). The steel used for rails under heavy traffic and on sharp curves, is
a).Nickel steel
b).Chrome steel
c).Magnese steel
d).Vanadium steel.
Correct Answer:
Magnese steel
Explanation:
Q216). The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
a).0.2
b).0.15
c).0.1
d).None of these.
Correct Answer:
0.2
Explanation: