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Civil Engineering MCQS -Building Materials Section 5
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1. The pigment used in paints for corrosive resistance, is
red lead
white lead
ferrous oxide
zinc white
2. A well seasoned timber may contain moisture up to
4 to 6%
6 to 8%
8 to 10%
10 to 12%.
3. The stones obtained by blasting are used as
ballast in railways
aggregates for concrete
roadmetal
All the above.
4. Distemper is
a paint consisting of powdered chalk, pigments, and water
a water proofing agent
a paint consisting of coloured cement and water
a drying agent.
5. Oil varnish generally consists of
synthetic resin and spirit
oil, wax and resin
resin, oil and turpentine
spirit, oil and wax.
6. Pick up the correct statement from the following:
The average crushing strength of hand moulded bricks is 6000 t/m2
The average tensile strength of hand moulded brick is 200 t/m2
The average shearing strength of hand moulded brick is 600 t/m2
All the above.
7. The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
radial shakes
star shakes
heart shakes
cup shakes.
8. Sea sand used in structures causes
dampness
efflorescence
disintegration
All of these.
9. The compound of Portland cement which reacts immediately with water and also sets first is
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite.
10. Refractory bricks resist
high temperature
chemical action
dampness
all the above.
11. When a brick is immersed in water for 24 hours and then dried, if
no grey or white deposits appear on the surface, the brick is free from soluble salts
no grey or white deposits appear on the surface, the brick is free from soluble salts
0 per cent surface is covered with grey or white deposits, the brick has serious efflorescence
All the above.
12. In arches, stratified stones are placed so that their planes are
parallel
perpendicular
radial
none of these.
13. Pick up the correct statement from the following:
Acid test is done to find out the weathering quality of stones
Attrition test is done to find out the rate of wear of stones which are used in road construction
Crushing test is done to find out the compressive strength of the stone
All the above.
14. The fire clay contains pure
lime
oxide of iron
hydrated aluminium silicate
magnesium.
15. Pick up the correct characteristic of Pyroxene from the following:
It forms octagonal crystals
It converts to chlorine by hydration
Its density is 2.3 to 3.6 g/cm2
All the above.
16. For sanitary pipes and chemical stonewares,
salt glazing is used
lead glazing is used
opaque glazing is used
None of these.
17. The steel used for rails under heavy traffic and on sharp curves, is
Nickel steel
Chrome steel
Magnese steel
Vanadium steel.
18. The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick
20%
15%
10%
None of these.
19. Snowcrete is one of the patent forms of
distempers
water proof cement paints
enamel paints
enamel paints
20. The usual percentages of clay and metal in cermet are :
50%, 50%
60%, 40%
70%, 30%
80%, 20%.
21. Pick up the correct statement from the following:
Horn blende mineral is brittle
Muscovite is also known as white mica and potashmica
Biotite is also known as blackmica
All the above.
22. The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called
Plutonic rocks
Hypabyssal rocks
Volcanic rocks
Ignoeous rocks.
23. The base material for distemper, is
chalk
lime
lime putty
cement wash.
24. The thermosetting plastic
becomes rigid when moulded at suitable pressure and temperature
at 127°C to 177°C permanently set and further application of heat does not soften it
charrs at 343°C
All the above.
25. Pick up the synthetic resin from the following:
Malamine resin
Phenolic resin
Resorcinol resin
All of these.
26. Slacking of lime is affected by
keeping it exposed to air
immersing the lime in water
crushing the lime lumps
none of these.
27. The steel used in R.C.C. work is
stainless steel
mild steel
high carbon steel
wrought iron.
28. Mastic asphalt is
water proof
fire proof
elastic
all the above.
29. Non acid-resistant asbestos is :
tremolite asbestos
chrysolite abestos
amosite absestos
none of these.
30. Stones used for the construction of retaining walls must be
soft
hard
light
heavy
31. Permanent magnets are made of high carbon steel and
15% of cobalt
15% of cobalt
35% of cobalt
35% of cobalt
32. Plastics are compounds of carbon with element
hydrogen
nitrogen
oxygen
All of these
33. Pick up the correct statement from the following:
The plastic bottles are made by the process of blowing
The plastic sheets are made by the calendering process in which the plastic material is allowed to pass between cylindrical rollers
The application of thermo-setting resins on sheets of paper, is called laminating process
All the above.
34. Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:
Alumina
Lime
Ironoxide
Magnesia.
35. Cast iron is used for
structural works in beams
small sized water pipes
columns and struts
none to these.
36. Stainless steel resists corrosion due to
carbon
sulphur
vanadium
chromium
37. Commonly used thinner in
lacquer paints, is alcohol
cellulose paints is ethyle acetate
oil paints, is naptha
all the above.
38. Good quality sand is never obtained from
river
nala
sea
gravel powder.
39. Pick up the rock which is not a sedimentary rock from the following:
gravel
sand stone
gypsum
dolerite
40. For a good building stone, its specific gravity should the greater than
1.5
1.7
2.2
2.7
41. Blister steel
is obtained by cementation process
is full of fissures and cavities
can not be forged
all the above.
42. The most important constituent of varnish, is
drier
solvent
resin
all the above.
43. A ferrous metal is
cast iron
wrought iron
steel
all the above.
44. For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is
3.34244213
2.930671296
2.524363426
none of these.
45. Pick up the correct statement from the following:
Lime is available in free state
Lime is available by dissolving calcium carbonate in water
Lime is available by calcining calcium carbonate at 900°C
Lime is nothing but calcium chloride
46. Water paint is a
white wash
colour wash
whiting
all the above.
47. Seasoning of timber is done
to make it water proof
to paint its surface
to increase its temperature
to remove water.
48. The specific gravity of marble, is
2.5
2.6
2.66
2.72
49. The rocks having alumina or clay as their major constituents, are known as
siliceous rocks
. argillaceous rocks
calcareous rocks
sedimentary rocks
50. The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner, are known as
knots
rindgalls
burls
none of these.
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