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Civil Engineering MCQS -Building Materials Section 1
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1. In a mortar, the binding material is
cinder.
cement
sand
surkhi
2. Lacquer paints
are generally applied on structural steel
are less durable as compared to enamel paints
consist of resin and nitro-cellulose
all the above.
3. Wrought iron contains carbon upto
0.25%
1.00%
1.50%
2%.
4. Pick up the polymineralic rock from the following:
Quartz sand
Pure gypsum
Magnesite
Granite
5. Pick up the correct statement from the following:
For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
All the above.
6. Ultimate strength to cement is provided by
Tricalcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite.
7. Elastomers can extend upto
five times their original dimensions
seven times their original dimensions
ten times their original dimensions
three times their original dimensions.
8. Bitumen felt
is used as water proofing material
is used as damp proofing material
is made from bitumen and hessian fibres
all the above.
9. In the method of condensation polymerization,
low-molecular substances are removed from the high molecular substance
the reaction proceeds with an evolution of ammonia
the reaction proceeds with an evolution of hydrogen chloride
all the above.
10. In the cement the compound quickest to react with water, is
Tricalcium aluminate
Tetra-calcium alumino-ferrite
Tricalcium silicate
Dicalcium silicate.
11. The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
12. The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout
the monsoon
the winter
the summer
none of these.
13. The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Igneous rocks.
14. Quartzite is a
metamorphic rock
argillaceous rock
calcareous rock
calcareous rock
15. The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig.
16. Sand stone is
sedimentary rock
metamorphic rock
igneous rock
volcanic rock.
17. If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig.
18. Stainless steel contains
18% of chromuim and 8% nickel
8% of chromium and 18% of nickel
12% of chromium and 36% of nickel
36% of chromium and 12% of nickel.
19. Pick up the hypabyssal rock from the following:
Granite
Dolerite
Basalt
All the above.
20. Depending on the chemical composition and mechanical properties, iron may be classified as
cast iron
wrought iron
steel
all the above.
21. Wrought iron contains carbon about
1.5% to 5.5%
0.5% to 1.75%
0.1% to 0.25%
none to these.
22. The main constituent of fly-ash, is
aluminium oxide
silica
ferrous oxide
All the above.
23. Bitumen in
solid state, is called asphalt
semi fluid state, is called mineral tar
fluid state, is called petroleum
all the above.
24. The plastics made from cellulose resin
are as clear as glass
are tough and strong
possess excellent electrical properties
all the above.
25. Kaolin is chemically classified as
metamorphic rock
argillaceous rock
calcareous rock
silicious rock.
26. Which one of the following is acid resistant asbestos:
actinolite asbestos
amosite asbestos
anthophylite asbestos
All the above.
27. Due to attack of dry rot, the timber
cracks
shrinks
reduces to powder
none of these.
28. Brittleness of cold is due to an excess of
sulphur
carbon
phosphorus
silicon.
29. For the manufacture of Portland cement, the proportions of raw materials used, are
lime 63% ; silica 22% ; other ingredients 15%
lime 22% ; silica 63% ; other ingredients 15%
silica 40% ; lime 40% ; other ingredients 20%
silica 70% ; lime 20% ; other ingredients 10%.
30. Asbestos cement
is brittle
warps due to changes in humidity
strength is lowered when saturated by water
all the above.
31. Gniess is obtained from
igneous rocks
metamorphic rocks
sedimentary rocks
sedimentary metamorphic rocks.
32. The rocks formed by gradual deposition, are called
sedimentary rocks
igneous rocks
metamorphic rocks
none of these.
33. Galvanising means covering iron with a thin coat of
tin
zinc
glaze
coal tar.
34. For preparing porcelains, the clay should be
sufficiently pure
of high degree of tanacity
of good plasticity
All the above.
35. Polymerization helps to improve the property of
strength
rigidity
elasticity
all of these.
36. Good quality stones must
be durable
be free from clay
resist action of acids
all the above.
37. Sewer pipes are made of
earthen ware
stone ware
efractory clay
all the above.
38. Fibre glass
retains heat-longer
has a higher strength to weight ratio
is shock proof and fire retardent
all the above.
39. Pick up the correct statement from the following:
The theory of formation of concrete is based on the phenomena of formation of voids
The bulking of sand is taken into account while volumetric proportioning of the aggregates
The dry sand and the sand completely flooded with water, have practically the same volume
All the above.
40. Pick up the correct statement from the following:
In stone arches, the stones are placed with their natural beds radial
In cornices, the stones are placed with their natural beds as vertical
In stone walls, the stones are placed with their natural beds as horizontal
All the above.
41. The commonly used colour pigment in paints, is
ambers
carbon black
iron oxide
all the above.
42. Varnish is a transparent or semi-transparent solution of resinuous substances in
alcohol
linseed
turpentine
all the above.
43. Initial setting time of cement for asbestos cement products should be not less than
30 minutes
50 minutes
75 minutes
90 minutes
44. The variety of pig iron used for the manufacture of steel by Bessemer process, is
Bessemer pig
Grey pig
White forge pig
Mottled pig.
45. For melting one tonne of cast iron
700 m3 air is required
20 kg limestone is required
one quintal coke is required
all the above.
46. For filling cracks in masonry structures, the type of bitumen used, is
cut-back bitumen
bitumen-emulsion
blown bitumen
plastic bitumen.
47. Plastic
is an organic substance
consists of natural or synthetic binders
finished products are rigid and stable at normal temperature
All the above.
48. Vanadium steel is generally used for
railway switches and crossing
bearing balls
magnets
axles and springs.
49. Pick up the correct statement from the following:
In basic Bessemer process, the steel heats the converter
In open-hearth process, the furnace heats the steel
In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
all the above.
50. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
Cementation process
Cementation process
Bessemer process
Open hearth process.
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