A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called
Slate
Plank
Board
Strip
Correct Answer :
D. Strip
Related Questions
Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is
(i) and (ii)
(ii) and (iii)
(iii) and (iv)
(i) and (iv)
Pick up the correct statement from the following:
Slaked lime contains calcium hydroxide
Quick lime contains calcium oxide
Slaked lime may be obtained from quick lime
All the above
Red short iron cracks when bent due to the presence of
Sulphur
Carbon
Phosphorus
Silicon
Bitumen felt is used for
Water proofing
Damp proofing
Both (A) and (B)
Neither (A) nor (B)
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
The size of mould for bricks, is generally kept
A little large to specified size
A little small to specified size
Equal to specified size
10% larger than specified size
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 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
The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
Radial shakes
Heart shakes
Wind cracks
Twisted fibres
Dolomite is a lime stone which contains carbonate of magnesia upto
15 %
20 %
25 %
45 %
Gypsum consists of
H₂S and CO₂
CaSO4 and H₂O
Lime and H₂O
CO₂ and calcium
Slate is formed by metamorphic action on
Shale
Lime stone
Sand stone
Granite
Cast iron contains carbon approximately
1.5% to 5.5%
0.05% to 1.75%
0.250 %
None to these
The wedging is adopted for quarrying costly stratified rock such as
Laterite
Marble
Limestone
All the above
For lime concrete,
Slump is 50 to 75 mm
Flexural strength at 90 days is 0.2 N/mm2
Compressive strength at 90 days is 1.5 N/mm2
All the above
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
Manganese steels
Are non-magnetic
Possess high electrical resistance
Possess low coefficient of expansion
All the above
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
Most commonly used solvent in oil paints, is
Petroleum
Spirit
Coal tar
Turpentine
Pick up the correct statement from the following:
For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
For thin structures which remain continuously under water, the watercement ratio by weight should be 0.55
All the above
The property by virtue of which lime sets under water, is known as
Slacking
Setting
Hydraulicity
Calcining
Cross cut saw is used for
Cutting soft stones
Cutting hard stones
Cutting large blocks of stones
Dressing stones
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
Wrought iron is used for
Structural works in beams
Small sized water pipes
Columns and struts
None to these
Iron ore may contain
Carbon
Silicon
Phosphorus and manganese
All the above
Pig iron obtained from the furnace which is properly provided with fuel at a very high temperature, is called
Bessemer pig
Grey or foundry pig
White or forge pig
Mottled pig
For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is
80 : 13 : 7
70 : 20 : 10
60 : 35 : 5
None of these
The rocks in which argil (or clay) predominates, are called
Siliceous rocks
Argillaceous rocks
Calcareous rocks
Igneous rocks
Formula for quick lime, is
CaCO3
Ca(OH)2
CO3CO2
None to these
The variety of pig iron used for the manufacture of steel by Bessemer process, is
Bessemer pig
Grey pig
White forge pig
Mottled pig