500 Best Building Materials MCQ
Q73). Pick up the plutonic rock from the following:
a).Granite
b).Dolerite
c).Basalt
d).All the above.
Correct Answer:
Granite
Explanation:
Q74). The lime which contains mainly calcium oxide and slacks with water, is
a).fat lime
b).quick lime
c).hydraulic lime
d).poor lime
Correct Answer:
quick lime
Explanation:
Q75). Seasoning is
a).a process of removing sap
b).creosoting
c).painting with sodium silicate
d).coating with tar.
Correct Answer:
a process of removing sap
Explanation:
Q76). Inhaling of fly-ash over a long period causes
a).silicosis
b).fibrosis of lungs
c).bronchitis
d).all the above.
Correct Answer:
all the above.
Explanation:
Q77). Minimum required water cement ratio for a workable concrete, is
a).0.3
b).0.4
c).0.5
d).0.6
Correct Answer:
0.4
Explanation:
Q78). Rocks formed due to alteration of original structure due to heat and excessive pressure are called
a).sedimentary rocks
b).igneous rocks
c).metamorphic rocks
d).none of these.
Correct Answer:
metamorphic rocks
Explanation:
Q79). The compound of Portland cement which contributes to the strength after two to three years is
a).Tricalcium silicate
b).Di-calcium silicate
c).Tricalcium aluminate
d).Tetracalcium alumino ferrite.
Correct Answer:
Di-calcium silicate
Explanation:
Q80). For slaking of 10 kg of CaO, the theoretical amount of water is
a).2.2 kg
b).1.5 kg
c).3.2 kg
d).None of these.
Correct Answer:
3.2 kg
Explanation: