Bitumen felt is used for
Water proofing
Damp proofing
Both (A) and (B)
Neither (A) nor (B)
Correct Answer :
C. Both (A) and (B)
Related Questions
Due to attack of dry rot, the timber
Cracks
Shrinks
Reduces to powder
None of these
A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
10 %
15 %
20 %
25 %
Cast iron contains carbon approximately
1.5% to 5.5%
0.05% to 1.75%
0.250 %
None to these
Blister steel
Is obtained by cementation process
Is full of fissures and cavities
Can be easily welded
All the above
A pug mill is used for
Softening brick earth
Moulding brick earth
Tempering brick earth
Providing brick earth
The commonly used drying oil for oil paints, is
Olive oil
Linseed oil
Kerosene oil
Acetate of lead
The portion of a brick cut to form angles other than right angles in plan, is known as
Queen closer
King closer
Closer
Squint brick
Smith's test of stones is performed to find out
The presence of soluble matter of stone
The compressive strength of the stone
The hardness of the stone
The toughness of the stone
The percentage of alumina and silica in good fire clay vary respectively is
25, 75
30, 70
35, 65
All of these
The commonly used lime in white washing, is
White lime
Fat lime
Hydraulic lime
Quick lime
Pick up the correct statement from the following:
Rust is due to formation of oxides
Cast iron oxidises less
Steel oxidises most
All the above
The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is
Less than 1
Equal to 1
Greater than 1
Less than 1 in beams but greater than 1 in channels
The frog of a brick is normally made on its
Top face
Bottom face
Longer face
Shorter side
The presence of sand in brick earth prevents:
Cracking of bricks
Shrinkage of bricks
Warping of bricks
None of these
Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite The correct answer is
Only (iii)
Both (i) and (iii)
Both (ii) and (iii)
All (i), (ii) and (iii)
Shingle is
Decomposed laterite
Crushed granite
Water bound pebbles
Air weathered rock
A queen closer is a
Brick laid with its length parallel to the face or direction of wall
Brick laid with its breadth parallel to the face or direction of wall
Brick having the same length and depth as the other bricks but half the breadth
Brick with half the width at one end and full width at the other
Ultimate strength to cement is provided by
Tri-calcium silicate
Di-calcium silicate
Tri-calcium aluminate
Tetra calcium alumino ferrite
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
The stones obtained by blasting are used as
Ballast in railways
Aggregates for concrete
Road metal
All the above
The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is
20
15
5
0
For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
The melting point of silica is:
1570°C
1630°C
1730°C
1850°C
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
Pick up the correct statement from the following:
Bull's trench kiln a trench excavated in ground
Hoffman's kiln is constructed over ground
Tunnel Kiln is constructed as a tunnel
All the above
The normal consistency of ordinary Portland cement is about
10 %
20 %
30 %
40 %
The initial setting time of lime-pozzolana, is
30 minutes
60 minutes
90 minutes
120 minutes
The harmonious mixing of the clay ingredients, is known as
Weathering
Blending
Tempering
None of these
Expansion Joints in masonry walls are provided in wall lengths usater than
10 m
20 m
30 m
40 m
Pick up the correct statement from the following:
Rusting is caused due to combined action of air, moisture and carbon dioxide
During rusting, first ferrous bicarbonates are formed
On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
All the above