500 Best Building Materials MCQ
Q289). Upto a maximum of 72% of iron, is available in
a).Magnetite
b).Red haemetite
c).Limonite
d).Siderite
Correct Answer:
Magnetite
Explanation:
Q290). For lime concrete,
a).slump is 50 to 75 mm
b).flexural strength at 90 days is 0.2 N/mm
c).compressive strength at 90 days is 1.5 N/mm
d).all the above.
Correct Answer:
all the above.
Explanation:
Q291). Pig iron made from heamatite ores free from sulphur, phosphorus and copper, is known as
a).Bessemer pig
b).Grey or foundry pig
c).White or forge pig
d).Mottled pig
Correct Answer:
Bessemer pig
Explanation:
Q292). Pick up the correct statement from the following:
a).Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
b).Cracked paints may be cured by removing paint and giving a fresh coat of paint
c).Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
d).All the above.
Correct Answer:
All the above.
Explanation:
Q293). The material generally not used as extender in paints, is
a).powdered silica
b).gypsum
c).talc
d).zinc white.
Correct Answer:
zinc white.
Explanation:
Q294). Pick up the non-inflammable plastic from the following:
a).Cellulose acetate plastics
b).Polyvinyl chloride plastics
c).Phenol formaldehyde plastic
d).Urea formaldehyde plastic.
Correct Answer:
Polyvinyl chloride plastics
Explanation:
Q295). The most commonly used synthetic abrasive is
a).aluminium carbide
b).boric acid
c).silicon
d).All of these.
Correct Answer:
All of these.
Explanation:
Q296). For light and ornamental casting, the most unsuitable pig iron, is
a).Bessemer pig
b).Grey or foundry pig
c).White or forge pig
d).Mottled pig.
Correct Answer:
Mottled pig.
Explanation: