500 Best Building Materials MCQ
Q273). Pick up the correct statement from the following:
a).Rusting is caused due to combined action of air, moisture and carbon dioxide
b).During rusting, first ferrous bicarbonates are formed
c).On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
d).All the above.
Correct Answer:
All the above.
Explanation:
Q274). Whitworth compressed steel is obtained when molten steel is subjected to a pressure of
a).5 kg/mm
b).9 kg/mm
c).13 kg/mm
d).15 kg/mm
Correct Answer:
9 kg/mm
Explanation:
Q275). Asbestos
a).is an excellant insulator for heat and electricity
b).is fire-proof and acid proof
c).has sp. gravity equal to 3.10
d).All the above.
Correct Answer:
All the above.
Explanation:
Q276). Mild steel is used for
a).structural works in beams, joints and girders
b).small sized water pipes
c).columns and struts
d).none of these.
Correct Answer:
structural works in beams, joints and girders
Explanation:
Q277). The sequence of refractory materials according to increasing melting points is :
a).Dolomite, Magnesia, Bauxite, Chromite
b).Bauxite, Chromite, Dolomite, Magnesia
c).Magnesia, Bauxite, Dolomite, Chromite.
d).
Correct Answer:
Bauxite, Chromite, Dolomite, Magnesia
Explanation:
Q278). Veneering means
a).carving out designs on timber planks
b).chemically treating timber planks
c).thick layer of superior wood glued to inferior wood
d).thin layer of superior wood glued to inferior wood.
Correct Answer:
thick layer of superior wood glued to inferior wood
Explanation:
Q279). Laterite is a/an
a).volcanic rock
b).argillaceous rock
c).calcareous rock
d).silicious rock.
Correct Answer:
argillaceous rock
Explanation:
Q280). A stone is rejected if it absorbs water more than
a).0.05
b).0.1
c).0.15
d).0.2
Correct Answer:
0.1
Explanation: