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CMAT > Building Materials (SECTION 1) > Flashcards

Building Materials (SECTION 1) Flashcards

1
Q

In a mortar, the binding material is?

A. cement

B. sand

C. surkhi

D. cinder

A

CEMENT

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2
Q

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 of the above

A

ALL OF THE ABOVE

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3
Q

Wrought iron contains carbon up to:

A. 0.25%

B. 1.0%

C. 1.5%

D. 2%

A

0.25%

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4
Q

Pick up the polymineralic rock from the following:

A. Quartz sand

B. Pure gypsum

C. Magnesite

D. Granite

E. None of these

A

GRANITE

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5
Q

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 underwater, the water-cement ratio by weight should be 0.55

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

E. All of the above

A

ALL OF THE ABOVE

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6
Q

Ultimate strength to cement is provided by:

A. Tricalcium silicate

B. Di-calcium silicate

C. Tri-calcium aluminate

D. Tetra calcium alumino ferrite

A

DI-CALCIUM SILICATE

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7
Q

Elastomers can extend up to:

A. five times their original dimensions

B. seven times their original dimensions

C. ten times their original dimensions

D. three times their original dimensions

A

TEN TIMES THEIR ORIGINAL DIMENSIONS

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8
Q

Bitumen felt:

A. is used as a waterproofing material

B. is used as a damp-proofing material

C. is made from bitumen and hessian fibres

D. all of the above

A

ALL OF THE ABOVE

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9
Q

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 of the above

A

ALL OF THE ABOVE

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10
Q

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

A. Tricalcium aluminate

B. Tetra-calcium alumino-ferrite

C. Tricalcium silicate

D. Dicalcium silicate

A

TRICALCIUM ALUMINATE

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11
Q

The initial setting time of lime-pozzolana is:

A. 30 minutes

B. 60 minutes

C. 90 minutes

D. 120 minutes

A

120 MINUTES

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12
Q

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

A

THE MONSOON

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13
Q

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

A. Plutonic rocks

B. Hypabyssal rocks

C. Volcanic rocks

D. Igneous rocks.

A

PLUTONIC ROCKS

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14
Q

Quartzite is a:

A. metamorphic rock

B. argillaceous rock

C. calcareous rock

D. Igneous rocks

A

METAMORPHIC ROCK

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15
Q

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

A

WHITE FORGE PIG

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16
Q

Sandstone is:

A. sedimentary rock

B. metamorphic rock

C. igneous rock

D. volcanic rock

A

SEDIMENTARY ROCK

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17
Q

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

A

WHITE OR FORGE PIG

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18
Q

Stainless steel contains:

A. 18% of chromium 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

A

18% OF CHROMIUM AND 8% NICKEL

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19
Q

Pick up the hypabyssal rock from the following:

A. Granite
B. Dolerite
C. Basalt
D. All of the above

A

DOLERITE

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20
Q

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

A. cast iron

B. wrought iron

C. steel

D. all of the above

A

ALL OF THE ABOVE

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21
Q

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 of these

A

0.1% TO 0.25%

22
Q

The main constituent of fly-ash is:

A. aluminium oxide

B. silica

C. ferrous oxide

D. All of these

A

ALL OF THESE

23
Q

Bitumen in:

A. solid state, is called asphalt

B. semi fluid state, is called mineral tar

C. fluid state, is called petroleum

D. all of the above

A

ALL OF THE ABOVE

24
Q

The plastics made from cellulose resin:

A. are as clear as glass

B. are tough and strong

C. possess excellent electrical properties

D. All of the above

A

ALL OF THE ABOVE

25
Q

Kaolin is chemically classified as:

A. metamorphic rock

B. argillaceous rock

C. calcareous rock

D. silicious rock

A

ARGILLACEOUS ROCK

26
Q

Which one of the following is acid-resistant asbestos:

A. actinolite asbestos

B. amosite asbestos

C. anthophylite asbestos

D. crocidolite asbestos

E. All of the above

A

ALL OF THE ABOVE

27
Q

Due to the attack of dry rot, the timber:

A. cracks

B. shrinks

C. reduces to powder

D. none of these

A

REDUCES TO POWDER

28
Q

The brittleness of cold is due to an excess of:

A. sulphur

B. carbon

C. phosphorus

D. silicon

A

PHOSPHORUS

29
Q

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%.

A

LIME 63% ; SILICA 22% ; OTHER INGREDIENTS 15%

30
Q

Asbestos cement:

A. is brittle

B. warps due to changes in humidity

C. strength is lowered when saturated by water

D. all of the above.

A

ALL OF THE ABOVE

31
Q

Gneiss is obtained from:

A. igneous rocks

B. metamorphic rocks

C. sedimentary rocks

D. sedimentary metamorphic rocks

A

SEDIMENTARY METAMORPHIC ROCKS

32
Q

The rocks formed by gradual deposition, are called:

A. sedimentary rocks

B. igneous rocks

C. metamorphic rocks

D. none of these

A

SEDIMENTARY ROCKS

33
Q

Galvanizing means covering iron with a thin coat of:

A. tin

B. zinc

C. glaze

D. coal tar

A

ZINC

34
Q

For preparing porcelains, the clay should be:

A. sufficiently pure

B. of high degree of tenacity

C. of good plasticity

D. All of the above

A

ALL OF THE ABOVE

35
Q

Polymerization helps to improve the property of:

A. strength

B. rigidity

C. elasticity

D. all of these

A

ALL OF THESE

36
Q

Good quality stones must:

A. be durable

B. be free from clay

C. resist action of acids

D. all of the above

A

ALL OF THE ABOVE

37
Q

Sewer pipes are made of

A. earthenware

B. stoneware

C. refractory clay

D. terracotta

E. all the above

A

STONE WARE

38
Q

Fiberglass:

A. retains heat-longer

B. has a higher strength-to-weight ratio

C. is shockproof and fire retardant

D. does not decay

E. all of the above

A

ALL OF THE ABOVE

39
Q

Pick up the correct statement from the following:

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

B. The bulking of sand is taken into account while the 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 of the above

A

ALL OF THE ABOVE

40
Q

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 of the above

A

ALL OF THE ABOVE

41
Q

The commonly used colour pigment in paints, is:

A. ambers

B. carbon black

C. iron oxide

D. lamp black

E. all of the above

A

ALL OF THE ABOVE

42
Q

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

A. alcohol

B. linseed

C. turpentine

D. all of the above

A

ALL OF THE ABOVE

43
Q

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

A

90 MINUTES

44
Q

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

A. Bessemer pig

B. Grey pig

C. White forge pig

D. Mottled pig

A

BESSEMER PIG

45
Q

For melting one tonne of cast iron:

A. 700 m3 of air is required

B. 20 kg limestone is required

C. one quintal coke is required

D. all of the above.

A

ALL OF THE ABOVE

46
Q

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.

A

PLASTIC BITUMEN

47
Q

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 of the above

A

ALL OF THE ABOVE

48
Q

Vanadium steel is generally used for:

A. railway switches and crossing

B. bearing balls

C. magnets

D. axles and springs

A

AXLES AND SPRINGS

49
Q

Pick up the correct statement from the following:

A. In the basic Bessemer process, the steel heats the
converter

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

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

D. all of the above

A

ALL OF THE ABOVE

50
Q

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 molds is known as:

A. Cementation process

B. Crucible process

C. Bessemer process

D. Open hearth process.

A

CRUCIBLE PROCESS

CMAT (14 decks)

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