500 Best Building Materials MCQ
Q137). Pick up the correct statement from the following:
a).Quick lime is obtained by burning pure lime stone:
b).Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
c).Poor lime is obtained by burning lime stone containing impurities more than 5%
d).All the above.
Correct Answer:
All the above.
Explanation:
Q138). The presence of original rounded surface on the manufactured piece of timber, is called
a).Wane
b).Torn grain
c).Diagonal grain
d).Chipmark.
Correct Answer:
Wane
Explanation:
Q139). Smith’s test of stones is performed to find out
a).the presence of soluble matter of stone
b).the compressive strength of the stone
c).the hardness of the stone
d).the toughness of the stone.
Correct Answer:
the presence of soluble matter of stone
Explanation:
Q140). The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
a).radial shakes
b).heart shakes
c).wind cracks
d).twisted fibres.
Correct Answer:
wind cracks
Explanation:
Q141). The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called
a).Cementation process
b).crucible process
c).Bessemer process
d).Open hearth process.
Correct Answer:
Cementation process
Explanation:
Q142). In paints, the pigment is responsible for
a).durability
b).colour
c).smoothness
d).glassy face
Correct Answer:
colour
Explanation:
Q143). The operation of removal of impurities or clay adhering to iron ores, is known as
a).dressing
b).calcination
c).roasting
d).smelting.
Correct Answer:
dressing
Explanation:
Q144). If water required for 1 bag of cement is 30 litres, the water cement ratio is :
a).0.4
b).0.5
c).0.6
d).None of these.
Correct Answer:
0.6
Explanation: