500 Best Building Materials MCQ
Q185). The cast iron when heated to red heat with powdered red haemetite in an oven for increasing its toughness, is converted to
a).grey cast iron
b).white cast iron
c).mottled cast iron
d).toughed cast iron.
Correct Answer:
mottled cast iron
Explanation:
Q186). Jhumb bricks are
a).under burnt
b).over burnt
c).kutcha
d).none of these.
Correct Answer:
over burnt
Explanation:
Q187). Plastic bitumen is generally used for
a).road pavements
b).expansion joints
c).crack fillings
d).none to these.
Correct Answer:
crack fillings
Explanation:
Q188). Pick up the correct statement from the following:
a).The heating of a material to redness in contact with air, is known as calcination
b).The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
c).The product that remains after calcination of limestone, is called lime
d).All the above.
Correct Answer:
All the above.
Explanation:
Q189). The commonly used thinner in oil paints, is
a).naptha
b).turpentine
c).both (a) and (b)
d).neither (a) nor (b)
Correct Answer:
both (a) and (b)
Explanation:
Q190). Cast iron
a).is obtained by purifying pig iron
b).is manufactured in required shapes
c).may contain 2 to 5 per cent of carbon with other impurities
d).All the above.
Correct Answer:
All the above.
Explanation:
Q191). Asbestos is
a).corrugated sheet used for roofing
b).an incombustible fire proof material
c).an organic substance
d).All the above.
Correct Answer:
All the above.
Explanation:
Q192). In a rock calcium carbonate predominates. State whether it is :
a).Sillicious rock
b).Argillaceous rock
c).Calcareous rock
d).None of these.
Correct Answer:
Calcareous rock
Explanation: