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Civil Engineering MCQS -Building Materials Section 2
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1. The rocks in which argil (or clay) predominates; are called
sillicious rocks
argillaceous rocks
calcareous rocks
igneous rocks.
2. A badly mixed cement concrete results in
segregation
bleeding
honey combing
none to these.
3. Pick up the correct statement regarding low heat cement from the following:
It possesses less compressive strength
Its initial setting time is about one hour
Its final setting time is about 10 hours
All the above.
4. Inner part of a timber log surrounding the pith; is called
sapwood
cambium layer
heart wood
none to these.
5. The filler used in plastic bitumen; is
shale powder
talc powder
asbestos powder
plastic powder
6. Resins are
not soluble in water
soluble in spirit
used in varnishes
all the above.
7. Refractory bricks are used for
retaining walls
columns
piers
combustion chambers.
8. Expanded metal is
manufactured from steel sheets
used for reinforced concrete in road pavements
measured in term of SWM (shortway mesh) and LWM (long way mesh)
all the above.
9. The rock generally used for roofing; is
granite
basalt
slate
pumice.
10. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm; in one direction and 20 cm in the other direction; is called a
cant
deal
baulk
strip.
11. Quick lime (or caustic lime)
is obtained by the calcination of pure lime stone
has great affinity to moisture
is amorphous
all the above.
12. Pick up the correct statement from the following:
soft stones are required for carving
light stones are required for arches
hard stones are required to stand high pressure
all the above.
13. Name the type of cement from the following for canal linings :
sulphate resisting cement
rapid hardening cement
quick setting cement
pozzuolana cement.
14. Mastic asphalt is generally used for
damp proof course
water proof layer
partition walls
both (a) and (b).
15. Black marble is generally found in the district of
Jodhpur
Jaipur
Jabalpur
Jaisalmer
16. The most fire resistant paints are :
enamel paints
aluminium paints
asbestos paints
cement paints.
17. If P is the percentage of water required for normal consistency; water to be added for determination of initial setting time; is
0.70 P
0.75 P
0.80 P
0.85 P
18. A pug mill is used for
softening brick earth
moulding brick earth
moulding brick earth
providing brick earth
19. A good brick earth should contain :
about 20% to 30% of alumina
about 50% to 60% of silica
not more than 5% of lime
All the above.
20. The commonly used lime in white washing; is
white lime
fat lime
hydraulic lime
lime
21. Shingle is
decomposed laterite
crushed granite
water bound pebbles
air weathered rock.
22. Pick up the plutonic rock from the following:
Granite
Dolerite
Basalt
All the above.
23. The lime which contains mainly calcium oxide and slacks with water; is
fat lime
quick lime
hydraulic lime
poor lime
24. Seasoning is
a process of removing sap
creosoting
painting with sodium silicate
coating with tar.
25. Inhaling of fly-ash over a long period causes
silicosis
fibrosis of lungs
bronchitis
All of these.
26. Minimum required water cement ratio for a workable concrete; is
0.3
0.4
0.5
0.6
27. Rocks formed due to alteration of original structure due to heat and excessive pressure are called
sedimentary rocks
sedimentary rocks
metamorphic rocks
none of these.
28. Inhaling of fly-ash over a long period causes
silicosis
fibrosis of lungs
bronchitis
All of these.
29. The compound of Portland cement which contributes to the strength after two to three years is
Tricalcium silicate
Tricalcium silicate
Tricalcium aluminate
Tetracalcium alumino ferrite.
30. For slaking of 10 kg of CaO; the theoretical amount of water is
2.2 kg
1.5 kg
3.2 kg
none of these.
31. Pick up the correct statement from the following: Method of sawing timber
tangentially to annual rings; is known as tangential method.
in four quarters such that each board cuts annual rings at angles not less than 45°; is known as quarter sawing method.
cut out of quarter logs; parallel to the medullary rays and perpendicular to annual rings; is known as radial sawing.
all the above.
32. Clay and silt content in a good brick earth must be at least
50%
40%
30%
25%
33. Bessemer process is used for the manufacture of
Pig iron
cast iron
Wrought iron
Steel.
34. The standard size of masonry bricks; is
18 cm x 8 cm x 8 cm
19 cm x 9 cm x 9 cm
20 cm x 10 cm x 10 cm
21 cm x 11 cm x 11 cm
35. Which one of the following is an air binding material ?
Gypsum
Acid-resistant cement
Quick lime
All of these.
36. A good quality stone absorbs water less than
5%
10%
15%
20%
37. Pick up the correct statement from the following:
Alexander Parkes; a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it; as Parkesite
Dr. L. Bakeland; a Belgian scientist prepared a product known as Bakelite
Pollark; an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
All the above.
38. Plywood is made from
common timber
bamboo fibre
teak wood only
asbestos sheets.
39. Soundness test of cement determines
quality of free lime
ultimate strength
durability
initial setting
40. The slag which floats on the surface of the molten iron generally contains
Lime (CaO) 45%
Silica (SiO2) 35%
Alumina (Al2O3) 12%
all the above.
41. Minimum of 40% of iron; is available in
Magnetite
Magnetite
Limonite
Black band.
42. If the iron ore contains clay as an impurity; the flux added during calcination; is
clay
lime stone
argillaceous iron ore
all the above.
43. Cement is said to be of good quality if
its colour is not greenish grey
a handful of cement thrown into a bucket of water does not float
a handful of cement thrown into a bucket of water does not float
none of these.
44. Cast steel is manufactured by
Cementation process
Crucible process
Bessemer process
Open hearth process.
45. For the manufacture of plywood; veneers are placed so that grains of adjacent veneers
run at right angles
parallel
inclined at 45°
inclined at 60°.
46. A 1st class brick immersed in water for 24 hours; should not absorb water (by weight) more than
10%
15%
20%
25%
47. The proportions of charcoal; saltpetre and sulphur in gun powder by weight; are respectively:
15; 75; 10
75; 10; 15
10; 15; 75
10; 75; 15.
48. Geologically; marble is known as
sedimentary rock
igneous rock
metamorphic rock
stratified rock.
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