Olete.in – MCQs, Mock Tests & Government Job Prep | Engineering Civil Engineering MCQS -Building Materials Section 1

In a mortar, the binding material is

1. cinder.
2. cement
3. sand
4. surkhi

✅ Correct Answer: 2

Lacquer paints

1. are generally applied on structural steel
2. are less durable as compared to enamel paints
3. consist of resin and nitro-cellulose
4. all the above.

✅ Correct Answer: 4

Wrought iron contains carbon upto

1. 0.25%
2. 1.00%
3. 1.50%
4. 2%.

✅ Correct Answer: 1

Pick up the polymineralic rock from the following:

1. Quartz sand
2. Pure gypsum
3. Magnesite
4. Granite

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
2. For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
3. For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
4. All the above.

✅ Correct Answer: 4

Ultimate strength to cement is provided by

1. Tricalcium silicate
2. Di-calcium silicate
3. Tri-calcium aluminate
4. Tetra calcium alumino ferrite.

✅ Correct Answer: 2

Elastomers can extend upto

1. five times their original dimensions
2. seven times their original dimensions
3. ten times their original dimensions
4. three times their original dimensions.

✅ Correct Answer: 3

Bitumen felt

1. is used as water proofing material
2. is used as damp proofing material
3. is made from bitumen and hessian fibres
4. all the above.

✅ Correct Answer: 4

In the method of condensation polymerization,

1. low-molecular substances are removed from the high molecular substance
2. the reaction proceeds with an evolution of ammonia
3. the reaction proceeds with an evolution of hydrogen chloride
4. all the above.

✅ Correct Answer: 4

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

1. Tricalcium aluminate
2. Tetra-calcium alumino-ferrite
3. Tricalcium silicate
4. Dicalcium silicate.

✅ Correct Answer: 1

The initial setting time of lime-pozzolana, is

1. 30 minutes
2. 60 minutes
3. 90 minutes
4. 120 minutes

✅ Correct Answer: 4

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

1. the monsoon
2. the winter
3. the summer
4. none of these.

✅ Correct Answer: 1

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

1. Plutonic rocks
2. Hypabyssal rocks
3. Volcanic rocks
4. Igneous rocks.

✅ Correct Answer: 1

Quartzite is a

1. metamorphic rock
2. argillaceous rock
3. calcareous rock
4. calcareous rock

✅ Correct Answer: 4

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

1. Bessemer pig
2. Grey or foundry pig
3. White forge pig
4. Mottled pig.

✅ Correct Answer: 3

Sand stone is

1. sedimentary rock
2. metamorphic rock
3. igneous rock
4. volcanic rock.

✅ Correct Answer: 1

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

1. Bessemer pig
2. Grey or foundry pig
3. White or forge pig
4. Mottled pig.

✅ Correct Answer: 3

Stainless steel contains

1. 18% of chromuim and 8% nickel
2. 8% of chromium and 18% of nickel
3. 12% of chromium and 36% of nickel
4. 36% of chromium and 12% of nickel.

✅ Correct Answer: 1

Pick up the hypabyssal rock from the following:

1. Granite
2. Dolerite
3. Basalt
4. All the above.

✅ Correct Answer: 2

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

1. cast iron
2. wrought iron
3. steel
4. all the above.

✅ Correct Answer: 4

Wrought iron contains carbon about

1. 1.5% to 5.5%
2. 0.5% to 1.75%
3. 0.1% to 0.25%
4. none to these.

✅ Correct Answer: 3

The main constituent of fly-ash, is

1. aluminium oxide
2. silica
3. ferrous oxide
4. All the above.

✅ Correct Answer: 4

Bitumen in

1. solid state, is called asphalt
2. semi fluid state, is called mineral tar
3. fluid state, is called petroleum
4. all the above.

✅ Correct Answer: 4

The plastics made from cellulose resin

1. are as clear as glass
2. are tough and strong
3. possess excellent electrical properties
4. all the above.

✅ Correct Answer: 4

Kaolin is chemically classified as

1. metamorphic rock
2. argillaceous rock
3. calcareous rock
4. silicious rock.

✅ Correct Answer: 2

Which one of the following is acid resistant asbestos:

1. actinolite asbestos
2. amosite asbestos
3. anthophylite asbestos
4. All the above.

✅ Correct Answer: 4

Due to attack of dry rot, the timber

1. cracks
2. shrinks
3. reduces to powder
4. none of these.

✅ Correct Answer: 3

Brittleness of cold is due to an excess of

1. sulphur
2. carbon
3. phosphorus
4. silicon.

✅ Correct Answer: 3

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

1. lime 63% ; silica 22% ; other ingredients 15%
2. lime 22% ; silica 63% ; other ingredients 15%
3. silica 40% ; lime 40% ; other ingredients 20%
4. silica 70% ; lime 20% ; other ingredients 10%.

✅ Correct Answer: 1

Asbestos cement

1. is brittle
2. warps due to changes in humidity
3. strength is lowered when saturated by water
4. all the above.

✅ Correct Answer: 4

Gniess is obtained from

1. igneous rocks
2. metamorphic rocks
3. sedimentary rocks
4. sedimentary metamorphic rocks.

✅ Correct Answer: 4

The rocks formed by gradual deposition, are called

1. sedimentary rocks
2. igneous rocks
3. metamorphic rocks
4. none of these.

✅ Correct Answer: 1

Galvanising means covering iron with a thin coat of

1. tin
2. zinc
3. glaze
4. coal tar.

✅ Correct Answer: 2

For preparing porcelains, the clay should be

1. sufficiently pure
2. of high degree of tanacity
3. of good plasticity
4. All the above.

✅ Correct Answer: 4

Polymerization helps to improve the property of

1. strength
2. rigidity
3. elasticity
4. all of these.

✅ Correct Answer: 4

Good quality stones must

1. be durable
2. be free from clay
3. resist action of acids
4. all the above.

✅ Correct Answer: 4

Sewer pipes are made of

1. earthen ware
2. stone ware
3. efractory clay
4. all the above.

✅ Correct Answer: 2

Fibre glass

1. retains heat-longer
2. has a higher strength to weight ratio
3. is shock proof and fire retardent
4. all the above.

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. The theory of formation of concrete is based on the phenomena of formation of voids
2. The bulking of sand is taken into account while volumetric proportioning of the aggregates
3. The dry sand and the sand completely flooded with water, have practically the same volume
4. All the above.

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. In stone arches, the stones are placed with their natural beds radial
2. In cornices, the stones are placed with their natural beds as vertical
3. In stone walls, the stones are placed with their natural beds as horizontal
4. All the above.

✅ Correct Answer: 4

The commonly used colour pigment in paints, is

1. ambers
2. carbon black
3. iron oxide
4. all the above.

✅ Correct Answer: 4

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

1. alcohol
2. linseed
3. turpentine
4. all the above.

✅ Correct Answer: 4

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

1. 30 minutes
2. 50 minutes
3. 75 minutes
4. 90 minutes

✅ Correct Answer: 4

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

1. Bessemer pig
2. Grey pig
3. White forge pig
4. Mottled pig.

✅ Correct Answer: 1

For melting one tonne of cast iron

1. 700 m3 air is required
2. 20 kg limestone is required
3. one quintal coke is required
4. all the above.

✅ Correct Answer: 4

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

1. cut-back bitumen
2. bitumen-emulsion
3. blown bitumen
4. plastic bitumen.

✅ Correct Answer: 4

Plastic

1. is an organic substance
2. consists of natural or synthetic binders
3. finished products are rigid and stable at normal temperature
4. All the above.

✅ Correct Answer: 4

Vanadium steel is generally used for

1. railway switches and crossing
2. bearing balls
3. magnets
4. axles and springs.

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. In basic Bessemer process, the steel heats the converter
2. In open-hearth process, the furnace heats the steel
3. In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
4. all the above.

✅ Correct Answer: 4

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

1. Cementation process
2. Cementation process
3. Bessemer process
4. Open hearth process.

✅ Correct Answer: 2