Civil Engineering - Building Materials MCQs Part 6
1. Pick up the correct statement from the following:
A.
The percentage of absorption for firebricks varies from 5 to 10
The percentage of absorption for firebricks varies from 5 to 10
B.
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
The percentage of silica in silica bricks is to the extent of about 95 to 97 percent
C.
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
Roughly 1 to 2 percent of lime in silica bricks is added to act as binding material
D.
The compressive strength of silica bricks is about 150 kg/cm2
The compressive strength of silica bricks is about 150 kg/cm2
E.
All the above.
All the above.
Answer Option E
2. Spirit varnish generally consists of
A.
oil, wax and resin
oil, wax and resin
B.
alcohol, wax and turpentine
alcohol, wax and turpentine
C.
pigment and synthetic resin
pigment and synthetic resin
D.
spirit and shellac
spirit and shellac
E.
none of these.
none of these.
Answer Option D
3. Pick up the correct statement from the following:
A.
Roasting is not necessary if iron ore is an oxide
Roasting is not necessary if iron ore is an oxide
B.
Impurities float on the molten iron as slag
Impurities float on the molten iron as slag
C.
The slag contains lime about 45%
The slag contains lime about 45%
D.
The molten iron is made to run, in a long channel formed in sand called 'sow'
The molten iron is made to run, in a long channel formed in sand called 'sow'
E.
All the above.
All the above.
Answer Option E
4. The tendency of a stone is, to split along:
A.
texture
texture
B.
fracture
fracture
C.
cleavage
cleavage
D.
structure
structure
E.
all the above.
all the above.
Answer Option C
5. Acrylic is the name of
A.
cellulose resin
cellulose resin
B.
alkyd resin
alkyd resin
C.
methyl metha crylate
methyl metha crylate
D.
cumarone-indene.
cumarone-indene.
Answer Option C
6. Glazing of clay products, is done
A. to improve their appearance
B. to protect them from atmospheric effect
C. to protect them from corrosive action
D. all the above.
Answer Option D
7. Lime mortar is generally made with
A. quick lime
B. fat lime
C. hydraulic lime
D. plain lime
E. none of these.
Answer Option C
8. Duco paints are
A. plastic paints
B. cellulose paints
C. emulsion paints
D. bituminous paints
E. oil paints.
Answer Option E
9. Pick up the correct statement from the following:
A. Melamine is obtained from calcium carbide
B. Formaldehyde is prepared synthetically from methane
C. The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
D. The plastics made from melamine formaldehyde resin, are used for electrical insulators
E. All the above.
Answer Option E
10. Steel contains carbon approximately
A. 1.50% to 5.6%
B. 0.05% to 1.75%
C. 0.25%
D. none to these.
Answer Option B
11. Cast iron contains carbon approximately
A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.250%
D. none to these.
Answer Option A
12. Plastic asphalt is
A. used as a water proofing layer over roof
B. a mixture of cement and asphalt
C. a natural asphalt
D. a refinery product.
Answer Option B
13. For obtaining vinyl chloride acetate, the method used, is
A. addition polymerization
B. condensation polymerization
C. co-polymerization
D. none of these.
Answer Option C
14. The yield strength and tensile strength of low carbon steel may be improved by the addition of
A. manganese
B. chromium
C. nickel
D. venadium
E. tungsten.
Answer Option D
15. Bitumen completely dissolves in
A. carbon bisulphide
B. chloroform
C. benzol
D. coaltar
E. All of these.
Answer Option E
16. Good quality cement contains higher percentage of
A. Tricalcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite
E. all the above.
Answer Option A
17. Soundness of cement is tested by
A. Vicat's apparatus
B. Le-chatelier apparatus
C. compressive strength testing apparatus
D. none of the these.
Answer Option B
18. The PVC doors and windows are preferred as they are
A. rust proof
B. rot proof
C. termile proof
D. water proof
E. all of these.
Answer Option E
19. Based on its dry weight, a freshly felled tree may contain water
A. 25%
B. 50%
C. 75%
D. 100%.
Answer Option D
20. Forge pig may be converted to wrought iron by
A. rolling
B. pudding
C. shingling
D. refining.
Answer Option B
21. To give a brilliant finish, the type of varnish used, is
A. water varnish
B. spirit varnish
C. turpentine varnish
D. oil varnish
E. none of these.
Answer Option B
22. Pick up the correct statement from the following:
A. Bull's trench kiln a trench excavated in ground
B. Hoffman's kiln is constructed overground
C. Tunnel Kiln is constructed as a tunnel
D. All the above.
Answer Option D
23. The softest rock is
A. marble
B. diamond
C. talc
D. quartz.
Answer Option C
24. Bitumen may be dissolved in
A. carbondioxide
B. water
C. sodium chloride
D. carbon disulphide
E. none of these.
Answer Option D
25. Pick up the correct statement from the following:
A. Rusting is caused due to combined action of air, moisture and carbon dioxide
B. During rusting, first ferrous bicarbonates are formed
C. On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
D. Ultimately hydrated ferric oxide is formed during rusting and carbon dioxide gets liberated
E. All the above.
Answer Option E
26. Whitworth compressed steel is obtained when molten steel is subjected to a pressure of
A. 5 kg/mm2
B. 9 kg/mm2
C. 13 kg/mm2
D. 15 kg/mm2
E. 10 kg/mm2.
Answer Option B
27. Asbestos
A. is an excellant insulator for heat and electricity
B. is fire-proof and acid proof
C. has sp. gravity equal to 3.10
D. is smooth like glass and silk
E. All the above.
Answer Option E
28. Mild steel is used for
A. structural works in beams, joints and girders
B. small sized water pipes
C. columns and struts
D. none of these.
Answer Option A
29. The sequence of refractory materials according to increasing melting points is :
A. Dolomite, Magnesia, Bauxite, Chromite
B. Bauxite, Chromite, Dolomite, Magnesia
C. Magnesia, Bauxite, Dolomite, Chromite.
Answer Option B
30. Veneering means
A. carving out designs on timber planks
B. chemically treating timber planks
C. thick layer of superior wood glued to inferior wood
D. thin layer of superior wood glued to inferior wood.
Answer Option C
31. Laterite is a/an
A. volcanic rock
B. argillaceous rock
C. calcareous rock
D. silicious rock.
Answer Option B
32. A stone is rejected if it absorbs water more than
A. 5%
B. 10%
C. 15%
D. 20%
E. 25%.
Answer Option B
33. The most valuable timber may be obtained from
A. chir
B. shisham
C. sal
D. teak.
Answer Option D
34. Pick up the correct statement from the following:
A. Blisters in the finished wrought iron, are caused due to the reaction between oxide of iron and carbon
B. The edges of a finished wrought iron, are rough due to red shortage
C. Pig iron (charcoal) is manufactured from magnetic ore (Fe3O4)
D. For the manufacture of wrought iron, non-sulphurous fuel is not necessary
E. All the above.
Answer Option E
35. Pick up the compound responsible for early strength of cement from the following:
A. Tetra-calcium alumino-ferrite
B. Tricalcium silicate
C. Tricalcium aluminate
D. Dicalcium silicate.
Answer Option B
36. Mastic asphalt is
A. acid resisting material
B. non-corrosive material
C. corrosive material
D. heating-resisting material.
Answer Option B
37. Which one of the following is used for preparing porcelain
A. clay
B. feldspar
C. quartz
D. minerals
E. All of these.
Answer Option E
38. The commonly used base for iron and steel work, is
A. red lead
B. zinc white
C. white lead
D. titanium white.
Answer Option A
39. Laterite is found in
A. U.P.
B. Punjab
C. West Bengal
D. Kerala.
Answer Option A
40. Lacquer is
A. oil paint
B. distemper
C. spirit varnish
D. none to these.
Answer Option C
41. Upto a maximum of 72% of iron, is available in
A. Magnetite
B. Red haemetite
C. Limonite
D. Siderite
E. Iron pyrites.
Answer Option A
42. For lime concrete,
A. slump is 50 to 75 mm
B. flexural strength at 90 days is 0.2 N/mm2
C. compressive strength at 90 days is 1.5 N/mm2
D. compressive strength at 26 days is 1.2 N/mm2
E. all the above.
Answer Option E
43. Pig iron made from heamatite ores free from sulphur, phosphorus and copper, is known as
A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig
E. All the above.
Answer Option A
44. Pick up the correct statement from the following:
A. Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
B. Cracked paints may be cured by removing paint and giving a fresh coat of paint
C. Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
D. All the above.
Answer Option D
45. The material generally not used as extender in paints, is
A. powdered silica
B. gypsum
C. talc
D. zinc white.
Answer Option D
46. Pick up the non-inflammable plastic from the following:
A. Cellulose acetate plastics
B. Polyvinyl chloride plastics
C. Phenol formaldehyde plastic
D. Urea formaldehyde plastic.
Answer Option B
47. The most commonly used synthetic abrasive is
A. aluminium carbide
B. boric acid
C. silicon
D. All of these.
Answer Option D
48. For light and ornamental casting, the most unsuitable pig iron, is
A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig.
Answer Option D
49. Seasoning of timber is essential to remove
A. knots from timber
B. sap from timber
C. twisted fibre from timber
D. roughness of timber.
Answer Option B
50. The melting point of silica is :
A. 1570°C
B. 1630°C
C. 1730°C
D. 1850°C.
Answer Option C
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