500 Best Building Materials MCQ
Q297). Seasoning of timber is essential to remove
a).knots from timber
b).sap from timber
c).twisted fibre from timber
d).roughness of timber.
Correct Answer:
sap from timber
Explanation:
Q298). The melting point of silica is :
a).1570°C
b).1630°C
c).1730°C
d).1850°C.
Correct Answer:
1730°C
Explanation:
Q299). A bull nose brick is not used for
a).rounding off sharp corners
b).pillars
c).decoration purpose
d).arches.
Correct Answer:
arches.
Explanation:
Q300). Red short iron cracks when bent due to the presence of
a).sulphur
b).carbon
c).phosphorus
d).silicon.
Correct Answer:
sulphur
Explanation:
Q301). Linseed oil is used in paints as
a).thinner
b).vehicle
c).base
d).drier.
Correct Answer:
drier.
Explanation:
Q302). Plaster of Paris is obtained by calcining
a).bauxite
b).gypsum
c).kankar
d).lime stone
Correct Answer:
gypsum
Explanation:
Q303). For high grade instruments the steel preferred to, is
a).cast steel
b).bessemer steel
c).mild steel
d).whitworth compressed steel.
Correct Answer:
cast steel
Explanation:
Q304). If the ore impurities is
a).clay, lime stone is used as flux
b).lime stone, clay is used as flux
c).quartz, lime stone and argallaceous iron ores are used as flux
d).All the above.
Correct Answer:
All the above.
Explanation: