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Quiz 7
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Q.1
Number of bricks required for one cubic metre of brick masonry is
400
450
500
550
Q.2
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
Q.3
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°
Q.4
Gneiss is obtained from
Igneous rocks
Metamorphic rocks
Sedimentary rocks
Sedimentary metamorphic rocks
Q.5
Which of the following is the purest form of iron?
Cast iron
Wrought iron
Mild steel
High carbon steel
Q.6
The most common admixture which is used to accelerate the initial set of concrete is
Gypsum
Calcium chloride
Calcium carbonate
None of the above
Q.7
Proper amount of entrained air in concrete results in
(i) Better workability
(ii) Better resistance to freezing and thawing
(iii) Lesser workability
(iv) Less resistance to freezing and thawing
(i) and (ii)
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
Q.8
The commonly used color pigment in paints, is
Ambers
Carbon black
Iron oxide
All the above
Q.9
The rocks having alumina or clay as their major constituents are known as
Siliceous rocks
Argillaceous rocks
Calcareous rocks
Sedimentary rocks
Q.10
Pug mill is used for
Preparation of clay
Moulding of clay
Drying of bricks
Burning of bricks
Q.11
A pug mill is used for
Softening brick earth
Moulding brick earth
Tempering brick earth
Providing brick earth
Q.12
Bitumen felt is used for
Water proofing
Damp proofing
Both (A) and (B)
Neither (A) nor (B)
Q.13
A ferrous metal is
Cast iron
Wrought iron
Steel
All the above
Q.14
Which of the following has more fire resisting characteristics?
Marble
Lime stone
Compact sand stone
Granite
Q.15
Which of the following metamorphic rocks has the most weather resisting characteristics?
Marble
Quartzite
Slate
Lime stone
Q.16
The minimum compressive strength of 2nd class bricks should be
75 kg/cm²
90 kg/cm²
100 kg/cm²
120 kg/cm²
Q.17
The minimum compressive strength of 1st class bricks should be
75 kg/cm²
90 kg/cm²
100 kg/cm²
120 kg/cm²
Q.18
Permanent magnets are made of high carbon steel and
15% of cobalt
20% of cobalt
35% of cobalt
45% of cobalt
Q.19
The most important constituent of an oil paint, is
Thinner
Vehicle
Pigment
All the above
Q.20
Stucco paints are suitable for
Stone masonry
Brick walls
Both (A) and (B)
Neither (A) nor (B)
Q.21
Depending on the chemical composition and mechanical properties, iron may be classified as
Cast iron
Wrought iron
Steel
All the above
Q.22
Fibre glass
Retains heat-longer
Has a higher strength to weight ratio
Is shock proof and fire retardant
All the above
Q.23
The base material for distemper, is
Chalk
Lime
Lime putty
Cement wash
Q.24
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
Q.25
The basic purpose of a retarder in concrete is
To increase the initial setting time of cement paste in concrete
To decrease the initial setting time of cement paste in concrete
To render the concrete more water tight
To improve the workability of concrete mix
Q.26
Rocks formed due to alteration of original structure due to heat and excessive pressure are called
Sedimentary rocks
Igneous rocks
Metamorphic rocks
None of these
Q.27
Higher pitch of the roof
i) results in stronger roof
ii) results in weaker roof
iii) requires more covering material
iv) requires less covering material
The correct answer is
(i) and (iii)
(i) and (iv)
(ii) and (iii)
(ii) and (iv)
Q.28
The method of addition polymerization is used for obtaining:
Polystyrene
Polypropylene
Polyvinylchloride
All of these
Q.29
Index number expressing the relative sizes of both coarse and fine aggregates, is called
Proportioning of aggregates
Fineness modulus
Grading of aggregates
None of these
Q.30
During smelting process, the combination of fuel in the furnace
Forms carbon dioxide
Carbon dioxide with carbon forms carbon mono-oxide
Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
All the above
Q.31
Bituminous fells are used for
Covering A.C. sheets
Covering sloping roofs
D.P.C.
None to these
Q.32
The softest rock is
Marble
Diamond
Talc
Quartz
Q.33
The term frog means
An apparatus to lift the stone
A depression on a face of brick
Vertical joint in a brick work
Soaking brick in water
Q.34
The slag which floats on the surface of the molten iron generally contains
Lime (CaO) 45%
Silica (SiO2) 35%
Alumina (Al2O3) 12% and MgO, CaSO4, KMnO2 and FeO 8%
All the above
Q.35
Mastic asphalt is generally used for
Damp proof course
Water proof layer
Partition walls
Both (A) and (B)
Q.36
Vanadium steel is generally used for
Railway switches and crossing
Bearing balls
Magnets
Axles and springs
Q.37
Brittleness of cold is due to an excess of
Sulphur
Carbon
Phosphorus
Silicon
Q.38
The moisture content in a well seasoned timber is
4 % to 6 %
10 % to 12 %
15 % to 20 %
100 %
Q.39
The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout
The monsoon
The winter
The summer
None of these
Q.40
Plastic bitumen is generally used for
Road pavements
Expansion joints
Crack fillings
None to these
Q.41
Lime concrete is generally used for
Wall foundations
Flooring at ground level
Both (A) and (B)
Neither (A) nor (B)
Q.42
The hardest rock is
Marble
Diamond
Talc
Quartz
Q.43
A heavy stone is suitable for
Arches
Rubble masonry
Roads
Retaining walls
Q.44
Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
Q.45
Duco paints are
Plastic paints
Cellulose paints
Emulsion paints
Oil paints
Q.46
During pudding
Molten metal is kept clear of the fuel
Carbon is converted into carbonic acid gas
Silicon forms a slag
All the above
Q.47
The coefficient of hardness of stones used in road work should be greater than
10
12
15
17
Q.48
The normal consistency of ordinary Portland cement is about
10 %
20 %
30 %
40 %
Q.49
The rock generally used for roofing, is
Granite
Basalt
Slate
Pumice
Q.50
Which of the following cements is suitable for use in massive concrete structures such as large dams?
Ordinary Portland cement
Low heat cement
Rapid hardening cement
Sulphate resisting cement
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