Specific gravity for most of the building stones lies between
A. 1.5 to 2.0
B. 2.0 to 2.5
C. 2.5 to 3.0
D. 3.0 to 3.5
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For melting one tonne of cast iron
A. 700 m3 air is required
B. 20 kg limestone is required
C. One quintal coke is required
D. All the above
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A volatile substance added to a paint to make its application easy and smooth, is known as
A. Base
B. Solvent
C. Vehicle
D. None to these
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Name the type of cement from the following for canal linings:
A. Sulphate resisting cement
B. Rapid hardening cement
C. Quick setting cement
D. Pozzolana cement
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Study the following statements. (i) Hydraulic lime is suitable for white washing, (ii) Fat lime is suitable for whitewashing, (iii) Hydraulic lime is suitable for making mortar, (iv) Fat lime is suitable for making mortar.
A. (i) and (iv)
B. (ii) and (iii)
C. (i) and (ii)
D. (iii) and (iv)
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The commonly used drying oil for oil paints, is
A. Olive oil
B. Linseed oil
C. Kerosene oil
D. Acetate of lead
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Formula for quick lime, is
A. CaCO3
B. Ca(OH)2
C. CO3 CO2
D. None of these
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Plywood is normally available
A. 1 mm thick
B. 2 mm thick
C. 2 to 3 mm thick
D. 3 mm to 4 mm thick
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Smith's test of stones is performed to find out
A. The presence of soluble matter of stone
B. The compressive strength of the stone
C. The hardness of the stone
D. The toughness of the stone
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Refractory bricks resist
A. High temperature
B. Chemical action
C. Dampness
D. All the above
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Knots in timber are
A. Defects caused by crushing fibres
B. Splits radiating from the centre
C. Speckled strains
D. Signs of branches cut off
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Crushing strength of a good building stone should be more than
A. 50 MPa
B. 100 MPa
C. 150 MPa
D. 200 MPa
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In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as
A. English bond
B. Double flemish bond
C. Zigzag bond
D. Single flemish bond
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The vehicle used in case of enamel paints is usually
A. Linseed oil
B. Water
C. Varnish
D. None of the above
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Which one of the following is used for preparing porcelain?
A. Clay
B. Feldspar
C. Quartz
D. All of these
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Which of the following gradients exerts maximum influence on properties of steel?
A. Iron
B. Carbon
C. Manganese
D. Sulphur
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Sewer pipes are made of
A. Earthen ware
B. Stone ware
C. Refractory clay
D. All the above
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The portion of a brick cut to form angles other than right angles in plan, is known as
A. Queen closer
B. King closer
C. Closer
D. Squint brick
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Plastic . . . . . . . .
A. Is an organic substance
B. Consists of natural or synthetic binders
C. Finished products are rigid and stable at normal temperature
D. All the above
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Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as
A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig
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