R4RIN – MCQs, Mock Tests | Engineering Civil Engineering MCQS -Building Materials Section 6

Pick up the correct statement from the following:

1. The percentage of absorption for firebricks varies from 5 to 10
2. The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
3. Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
4. All the above.

✅ Correct Answer: 4

Spirit varnish generally consists of

1. oil, wax and resin
2. alcohol, wax and turpentine
3. pigment and synthetic resin
4. spirit and shellac

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. Roasting is not necessary if iron ore is an oxide
2. Impurities float on the molten iron as slag
3. The slag contains lime about 45%
4. All the above.

✅ Correct Answer: 4

The tendency of a stone is, to split along:

1. texture
2. fracture
3. cleavage
4. structure

✅ Correct Answer: 3

Acrylic is the name of

1. cellulose resin
2. alkyd resin
3. methyl metha crylate
4. cumarone-indene.

✅ Correct Answer: 3

Glazing of clay products, is done

1. to improve their appearance
2. to protect them from atmospheric effect
3. to protect them from corrosive action
4. all the above.

✅ Correct Answer: 4

Lime mortar is generally made with

1. quick lime
2. fat lime
3. hydraulic lime
4. plain lime

✅ Correct Answer: 3

Duco paints are

1. plastic paints
2. cellulose paints
3. emulsion paints
4. oil paints.

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. Melamine is obtained from calcium carbide
2. Formaldehyde is prepared synthetically from methane
3. The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
4. All the above.

✅ Correct Answer: 4

Steel contains carbon approximately

1. 1.50% to 5.6%
2. 0.05% to 1.75%
3. 0.25%
4. none to these.

✅ Correct Answer: 2

Cast iron contains carbon approximately

1. 1.5% to 5.5%
2. 0.05% to 1.75%
3. 0.25%
4. none to these.

✅ Correct Answer: 1

Plastic asphalt is

1. used as a water proofing layer over roof
2. a mixture of cement and asphalt
3. a mixture of cement and asphalt
4. a refinery product.

✅ Correct Answer: 2

For obtaining vinyl chloride acetate, the method used, is

1. addition polymerization
2. condensation polymerization
3. co-polymerization
4. none of these.

✅ Correct Answer: 3

The yield strength and tensile strength of low carbon steel may be improved by the addition of

1. manganese
2. chromium
3. nickel
4. venadium

✅ Correct Answer: 4

Bitumen completely dissolves in

1. carbon bisulphide
2. chloroform
3. benzol
4. All of these.

✅ Correct Answer: 4

Good quality cement contains higher percentage of

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

✅ Correct Answer: 1

Soundness of cement is tested by

1. Vicat's apparatus
2. Le-chatelier apparatus
3. compressive strength testing apparatus
4. none of the these.

✅ Correct Answer: 2

The PVC doors and windows are preferred as they are

1. rust proof
2. rot proof
3. termile proof
4. all of these.

✅ Correct Answer: 4

Based on its dry weight, a freshly felled tree may contain water

1. 25%
2. 50%
3. 75%
4. 100%

✅ Correct Answer: 4

Forge pig may be converted to wrought iron by

1. rolling
2. pudding
3. shingling
4. refining.

✅ Correct Answer: 2

To give a brilliant finish, the type of varnish used, is

1. water varnish
2. spirit varnish
3. spirit varnish
4. oil varnish

✅ Correct Answer: 2

Pick up the correct statement from the following:

1. Bull's trench kiln a trench excavated in ground
2. Hoffman's kiln is constructed overground
3. Tunnel Kiln is constructed as a tunnel
4. All the above.

✅ Correct Answer: 4

The softest rock is

1. marble
2. diamond
3. talc
4. quartz.

✅ Correct Answer: 3

Bitumen may be dissolved in

1. carbondioxide
2. sodium chloride
3. water
4. carbon disulphide

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. Rusting is caused due to combined action of air, moisture and carbon dioxide
2. During rusting, first ferrous bicarbonates are formed
3. On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
4. All the above.

✅ Correct Answer: 4

Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

1. 5 kg/mm2
2. 9 kg/mm2
3. 13 kg/mm2
4. 15 kg/mm2

✅ Correct Answer: 2

Asbestos

1. is an excellant insulator for heat and electricity
2. is fire-proof and acid proof
3. has sp. gravity equal to 3.10
4. All the above.

✅ Correct Answer: 4

Mild steel is used for

1. structural works in beams, joints and girders
2. structural works in beams, joints and girders
3. columns and struts
4. none of these.

✅ Correct Answer: 1

The sequence of refractory materials according to increasing melting points is :

1. Dolomite, Magnesia, Bauxite, Chromite
2. Bauxite, Chromite, Dolomite, Magnesia
3. Magnesia, Bauxite, Dolomite, Chromite.
4. All of above.

✅ Correct Answer: 2

Veneering means

1. carving out designs on timber planks
2. chemically treating timber planks
3. thick layer of superior wood glued to inferior wood
4. thin layer of superior wood glued to inferior wood.

✅ Correct Answer: 3

Laterite is a/an

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

✅ Correct Answer: 2

The most valuable timber may be obtained from

1. chir
2. shisham
3. sal
4. teak.

✅ Correct Answer: 4

Pick up the correct statement from the following:

1. Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
2. The edges of a finished wrought iron, are rough due to red shortage
3. Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
4. All the above.

✅ Correct Answer: 4

Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)

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

✅ Correct Answer: 2

Mastic asphalt is

1. acid resisting material
2. non-corrosive material
3. corrosive material
4. heating-resisting material.

✅ Correct Answer: 2

Which one of the following is used for preparing porcelain

1. clay
2. feldspar
3. quartz
4. All of these.

✅ Correct Answer: 4

The commonly used base for iron and steel work, is

1. red lead
2. zinc white
3. white lead
4. titanium white.

✅ Correct Answer: 1

Laterite is found in

1. U.P.
2. Punjab
3. West Bengal
4. Kerala.

✅ Correct Answer: 1

Lacquer is

1. oil paint
2. distemper
3. spirit varnish
4. none to these.

✅ Correct Answer: 3

Upto a maximum of 72% of iron, is available in

1. Magnetite
2. Red haemetite
3. Limonite
4. Siderite

✅ Correct Answer: 1

For lime concrete,

1. slump is 50 to 75 mm
2. flexural strength at 90 days is 0.2 N/mm2
3. flexural strength at 90 days is 0.2 N/mm2
4. all the above.

✅ Correct Answer: 4

Pig iron made from heamatite ores free from sulphur, phosphorus and copper, is known as

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

✅ Correct Answer: 1

Pick up the correct statement from the following:

1. Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
2. Cracked paints may be cured by removing paint and giving a fresh coat of paint
3. Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
4. All the above.

✅ Correct Answer: 4

The material generally not used as extender in paints, is

1. Powdered silica
2. gypsum
3. talc
4. zinc white.

✅ Correct Answer: 4

Pick up the non-inflammable plastic from the following:

1. Cellulose acetate plastics
2. Polyvinyl chloride plastics
3. Phenol formaldehyde plastic
4. Urea formaldehyde plastic.

✅ Correct Answer: 2

The most commonly used synthetic abrasive is

1. aluminium carbide
2. boric acid
3. silicon
4. All of these.

✅ Correct Answer: 4

For light and ornamental casting, the most unsuitable pig iron, is

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

✅ Correct Answer: 4

Seasoning of timber is essential to remove

1. knots from timber
2. sap from timber
3. twisted fibre from timber
4. roughness of timber.

✅ Correct Answer: 2

The melting point of silica is :

1. 1570°C
2. 1630°C
3. 1730°C
4. 1850°C.

✅ Correct Answer: 3