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Quiz 6
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Q.1
Percentage content of silica in window glass, is
40 to 45
50 to 55
60 to 65
70 to 75
Q.2
Chemically, marble is known as
Metamorphic rock
Argillaceous rock
Calcareous rock
Siliceous rock
Q.3
Geologically, marble is known as
Sedimentary rock
Igneous rock
Metamorphic rock
Stratified rock
Q.4
Acrylic sheets
Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness
Are generally unaffected by most household detergents
Possess the light transmission rate of 93%
All the above
Q.5
Wrought iron contains carbon about
1.5% to 5.5%
0.5% to 1.75%
0.1% to 0.25%
None to these
Q.6
The usual percentages of clay and metal in cermet are:
50%, 50%
60%, 40%
70%, 30%
80%, 20%
Q.7
For a good building stone, its specific gravity should the greater than
1.5
1.7
2.2
2.7
Q.8
In arches, stratified stones are placed so that their planes are
Parallel
Perpendicular
Radial
None of these
Q.9
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
Q.10
The type of roof which slopes in two directions with a break in the slope on each side is known as
gable roof
hip roof
gambrel roof
mansard roof
Q.11
The slenderness ratio for masonry walls should not be more than
10
20
30
40
Q.12
For construction of structures under water, the type of lime used, is
Hydraulic lime
Fat lime
Quick lime
Pure lime
Q.13
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
Q.14
The nominal size of the modular brick is
190 mm × 90 mm × 80 mm
190 mm × 190 mm × 90 mm
200 mm × 100 mm × 100 mm
200 mm × 200 mm × 100 mm
Q.15
Clay and silt content in a good brick earth must be at least
50 %
40 %
30 %
25 %
Q.16
The initial setting time for ordinary Portland cement as per IS specifications should not be less than
10 minutes
30 minutes
60 minutes
600 minutes
Q.17
The variety of pig iron used for manufacture of wrought iron, is
Bessemer pig
Grey or foundry pig
White forge pig
Mottled pig
Q.18
Quick lime (or caustic lime)
Is obtained by the calcination of pure lime stone
Has great affinity to moisture
Is amorphous
All the above
Q.19
The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to
Grey cast iron
White cast iron
Mottled cast iron
Toughed cast iron
Q.20
Cast iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Q.21
Bulking of sand is caused due to
Surface moisture
Air voids
Viscosity
Clay contents
Q.22
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
Q.23
Wrought iron is manufactured from pig iron by
Refining
Pudding
Shingling
All the above
Q.24
Pig iron is manufactured from the ores by
Dressing
Calcination and roasting
Smelting
All the above
Q.25
Quick lime is
(i) Slow in setting
(ii) Rapid in slacking
(iii) Good in strength
Only (i)
Only (ii)
Both (i) and (ii)
Both (ii) and (iii)
Q.26
Good quality stones must
Be durable
Be free from clay
Resist action of acids
All the above
Q.27
Whitworth compressed steel is obtained when molten steel is subjected to a pressure of
5 kg/mm²
9 kg/mm²
13 kg/mm²
15 kg/mm²
Q.28
To give a brilliant finish, the type of varnish used, is
Water varnish
Spirit varnish
Turpentine varnish
Oil varnish
Q.29
A mortar joint in masonry which is normal to the face of wall is known as
Bed joint
Wall joint
Cross joint
Bonded joint
Q.30
The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called
Cementation process
Crucible process
Bessemer process
Open hearth process
Q.31
Compared to mild steel, cast iron has
(i) High compressive strength
(ii) High tensile strength
(iii) Low compressive strength
(iv) Low tensile strength
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
Q.32
Inner part of a timber log surrounding the pitch, is called
Sapwood
Cambium layer
Heart wood
None to these
Q.33
For high grade instruments the steel preferred to, is
Cast steel
Bessemer steel
Mild steel
Whitworth compressed steel
Q.34
According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
7 MPa
11.5 MPa
16 MPa
21 MPa
Q.35
Crushing strength of a first class brick should not be less than
3.5 N/mm²
7.0 N/mm²
10.5 N/mm²
14.0 N/mm²
Q.36
The tendency of a stone is, to split along:
Texture
Fracture
Cleavage
Structure
Q.37
Initial setting of cement is caused due to
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
Q.38
Early attainment of strength in rapid hardening cement is mainly due to
Gypsum
Finer grinding
Tri-calcium silicate
Tri-calcium aluminate
Q.39
Percentage of carbon content in mild steel is
Less than 0.25
Between 0.25 and 0.7
Between 0.7 and 1.5
Greater than 1.5
Q.40
Wrought iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Q.41
Asphalt is obtained from
Petroleum distillation
Bitumen distillation
Plastic distillation
None of these
Q.42
The normal curing period for lime mortar, is:
1 day
3 days
7 days
10 days
Q.43
Glazing is used to make earthenware
hard
soft
porous
impervious
Q.44
Stainless steel resists corrosion due to
Carbon
Sulphur
Vanadium
Chromium
Q.45
Chlorite, a green colour mineral is mainly derived from the decomposition of
Augite
Biotite
Hornblende
All of these
Q.46
Excess of silica in brick earth results in
cracking and warping of bricks
loss of cohesion
enhancing the impermeability of bricks
none of the above
Q.47
Plywood has the advantage of
Greater tensile strength in longer direction
Greater tensile strength in shorter direction
Same tensile strength in all directions
None of the above
Q.48
Addition of pozzolana to ordinary Portland cement increases
Bleeding
Shrinkage
Permeability
Heat of hydration
Q.49
As per IS specifications, the maximum final setting time for ordinary Portland cement should be
30 minutes
1 hour
6 hours
10 hours
Q.50
Initial setting time of cement for asbestos cement products should be not less than
30 minutes
50 minutes
75 minutes
90 minutes
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