Building Materials

Q1: The main constituent of fly-ash, is

A
aluminium oxide

B
silica

C
ferrous oxide

D
All of these.

Q2: Wrought iron contains carbon upto

A
0.25%

B
1.0%

C
1.5%

D
2%.

Q3: Ultimate strength to cement is provided by

A
Tricalcium silicate

B
Di-calcium silicate

C
Tri-calcium aluminate

D
Tetra calcium alumino ferrite.

Q4: For melting one tonne of cast iron

A
700 m3 air is required

B
20 kg limestone is required

C
one quintal coke is required

D
all the above.

Q5: Brittleness of cold is due to an excess of

A
sulphur

B
carbon

C
phosphorus

D
silicon.

Q6: Lacquer paints

A
are generally applied on structural steel

B
are less durable as compared to enamel paints

C
consist of resin and nitro-cellulose

D
contain alcohol as thinner

E
all the above.

Q7: Initial setting time of cement for asbestos cement products should be not less than

A
30 minutes

B
50 minutes

C
75 minutes

D
90 minutes.

Q8: The plastics made from cellulose resin

A
are as clear as glass

B
are tough and strong

C
possess excellent electrical properties

D
All the above.

Q9: Pick up the correct statement from the following:

A
In basic Bessemer process, the steel heats the converter

B
In open-hearth process, the furnace heats the steel

C
In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore

D
all the above.

Q10: Good quality stones must

A
be durable

B
be free from clay

C
resist action of acids

D
all the above.

Q11: The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout

A
the monsoon

B
the winter

C
the summer

D
none of these.

Q12: Fibre glass

A
retains heat-longer

B
has a higher strength to weight ratio

C
is shock proof and fire retardent

D
does not decay

E
all the above.

Q13: The initial setting time of lime-pozzolana, is

A
30 minutes

B
60 minutes

C
90 minutes

D
120 minutes.

Q14: Plastic

A
is an organic substance

B
consists of natural or synthetic binders

C
finished products are rigid and stable at normal temperature

D
is capable of flow when necessary heat and pressure are applied

E
All the above.

Q15: Depending on the chemical composition and mechanical properties, iron may be classified as

A
cast iron

B
wrought iron

C
steel

D
all the above.

Q16: For preparing porcelains, the clay should be

A
sufficiently pure

B
of high degree of tanacity

C
of good plasticity

D
All the above.

Q17: Varnish is a transparent or semi-transparent solution of resinuous substances in

A
alcohol

B
linseed

C
turpentine

D
all the above.

Q18: Kaolin is chemically classified as

A
metamorphic rock

B
argillaceous rock

C
calcareous rock

D
silicious rock.

Q19: 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

A
Cementation process

B
Crucible process

C
Bessemer process

D
Open hearth process.

Q20: Gniess is obtained from

A
igneous rocks

B
metamorphic rocks

C
sedimentary rocks

D
sedimentary metamorphic rocks.

Q21: Asbestos cement

A
is brittle

B
warps due to changes in humidity

C
strength is lowered when saturated by water

D
all the above.

Q22: The rocks which are formed due to cooling of magma at a considerable depth from earth's surface are called

A
Plutonic rocks

B
Hypabyssal rocks

C
Volcanic rocks

D
Igneous rocks.

Q23: If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

A
Bessemer pig

B
Grey or foundry pig

C
White or forge pig

D
Mottled pig.

Q24: Pick up the hypabyssal rock from the following:

A
Granite

B
Dolerite

C
Basalt

D
All the above.

Q25: Elastomers can extend upto

A
five times their original dimensions

B
seven times their original dimensions

C
ten times their original dimensions

D
three times their original dimensions.

Q26: Stainless steel contains

A
18% of chromuim and 8% nickel

B
8% of chromium and 18% of nickel

C
12% of chromium and 36% of nickel

D
36% of chromium and 12% of nickel.

Q27: In the cement the compound quickest to react with water, is

A
Tricalcium aluminate

B
Tetra-calcium alumino-ferrite

C
Tricalcium silicate

D
Dicalcium silicate.

Q28: The variety of pig iron used for the manufacture of steel by Bessemer process, is

A
Bessemer pig

B
Grey pig

C
White forge pig

D
Mottled pig.

Q29: The rocks formed by gradual deposition, are called

A
sedimentary rocks

B
igneous rocks

C
metamorphic rocks

D
none of these.

Q30: In the method of condensation polymerization,

A
low-molecular substances are removed from the high molecular substance

B
the reaction proceeds with an evolution of ammonia

C
the reaction proceeds with an evolution of hydrogen chloride

D
all the above.

Q31: Pick up the polymineralic rock from the following:

A
Quartz sand

B
Pure gypsum

C
Magnesite

D
Granite

E
None of these.

Q32: Due to attack of dry rot, the timber

A
cracks

B
shrinks

C
reduces to powder

D
none of these.

Q33: Bitumen in

A
solid state, is called asphalt

B
semi fluid state, is called mineral tar

C
fluid state, is called petroleum

D
all the above.

Q34: For filling cracks in masonry structures, the type of bitumen used, is

A
cut-back bitumen

B
bitumen-emulsion

C
blown bitumen

D
plastic bitumen.

Q35: Quartzite is a

A
metamorphic rock

B
argillaceous rock

C
calcareous rock

D
Igneous rocks

Q36: Which one of the following is acid resistant asbestos:

A
actinolite asbestos

B
amosite asbestos

C
anthophylite asbestos

D
crocidolite asbestos

E
All the above.

Q37: Sewer pipes are made of

A
earthen ware

B
stone ware

C
refractory clay

D
terracota

E
all the above.

Q38: The variety of pig iron used for manufacture of wrought iron, is

A
Bessemer pig

B
Grey or foundry pig

C
White forge pig

D
Mottled pig.

Q39: For the manufacture of Portland cement, the proportions of raw materials used, are

A
lime 63% ; silica 22% ; other ingredients 15%

B
lime 22% ; silica 63% ; other ingredients 15%

C
silica 40% ; lime 40% ; other ingredients 20%

D
silica 70% ; lime 20% ; other ingredients 10%.

Q40: Sand stone is

A
sedimentary rock

B
metamorphic rock

C
igneous rock

D
volcanic rock.

Q41: Galvanising means covering iron with a thin coat of

A
tin

B
zinc

C
glaze

D
coal tar.

Q42: Bitumen felt

A
is used as water proofing material

B
is used as damp proofing material

C
is made from bitumen and hessian fibres

D
all the above.

Q43: Pick up the correct statement from the following:

A
The theory of formation of concrete is based on the phenomena of formation of voids

B
The bulking of sand is taken into account while volumetric proportioning of the aggregates

C
The dry sand and the sand completely flooded with water, have practically the same volume

D
The expansion and contraction joints are provided if concrete structures exceed 12 m in length

E
All the above.

Q44: Sewer pipes are made of

A
earthen ware

B
stone ware

C
refractory clay

D
terracota

E
all the above.

Q45: Pick up the correct statement from the following:

A
In stone arches, the stones are placed with their natural beds radial

B
In cornices, the stones are placed with their natural beds as vertical

C
In stone walls, the stones are placed with their natural beds as horizontal

D
All the above.

Q46: In a mortar, the binding material is

A
cement

B
sand

C
surkhi

D
cinder.

Q47: Pick up the correct statement from the following:

A
For thin structures subjected to wetting and drying, the water cement ratio should be 0.45

B
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55

C
For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55

D
For massive concrete structures which remain continuously under water, the water cement ratio by weight should be 0.65

E
All the above.

Q48: Wrought iron contains carbon about

A
1.5% to 5.5%

B
0.5% to 1.75%

C
0.1% to 0.25%

D
none to these.

Q49: Vanadium steel is generally used for

A
railway switches and crossing

B
bearing balls

C
magnets

D
axles and springs.

Q50: The commonly used colour pigment in paints, is

A
ambers

B
carbon black

C
iron oxide

D
lamp black

E
all the above.

Q51: Polymerization helps to improve the property of

A
strength

B
rigidity

C
elasticity

D
all of these.


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