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Hassan
1.The commonly used colour pigment in paints, is
A. ambers
B. carbon black
C. iron oxide
D. ambers
2.Varnish is a transparent or semi-transparent solution of resinuous substances in
A. alcohol
B. linseed
C. turpentine
D. alcohol
3.Initial setting time of cement for asbestos cement products should be not less than
A. 30 minutes
B. 50 minutes
C. 75 minutes
D. 30 minutes
4.The variety of pig iron used for the manufacture of steel by Bessemer process, is
A. Bessemer pig
B. Grey pig
C. White forge pig
D. Bessemer pig
5.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. 700 m3 air is required
6.For filling cracks in masonry structures, the type of bitumen used, is
A. cut-back bitumen
B. bitumen-emulsion
C. blown bitumen
D. cut-back bitumen
7.Plastic
A. is an organic substance
B. consists of natural or synthetic binders
C. finished products are rigid and stable at normal temperature
D. is an organic substance
8.Vanadium steel is generally used for
A. railway switches and crossing
B. bearing balls
C. magnets
D. railway switches and crossing
9.Pick up the correct statement from the following:
A. In basic Bessemer process, the steel heats the converter
B. In open-hearth process, the furnace heats the steel
C. In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
D. In basic Bessemer process, the steel heats the converter
10.The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
A. Cementation process
B. Crucible process
C. Bessemer process
D. Cementation process
11.In a mortar, the binding material is
A. cement
B. sand
C. surkhi
D. cement
12.Lacquer paints
A. are generally applied on structural steel
B. are less durable as compared to enamel paints
C. consist of resin and nitro-cellulose
D. are generally applied on structural steel
13.Wrought iron contains carbon upto
A. 0.25%
B. 1.00%
C. 1.50%
D. 0.25%
14.Pick up the polymineralic rock from the following:
A. Quartz sand
B. Pure gypsum
C. Magnesite
D. Quartz sand
15.Pick up the correct statement from the following:
A. For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
B. For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
C. For thin structures which remain continuously under water, the water-cement ratio by weight should be 0.55
D. For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
16.Ultimate strength to cement is provided by
A. Tricalcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tricalcium silicate
17.Elastomers can extend upto
A. five times their original dimensions
B. seven times their original dimensions
C. ten times their original dimensions
D. five times their original dimensions
18.Bitumen felt
A. is used as water proofing material
B. is used as damp proofing material
C. is made from bitumen and hessian fibres
D. is used as water proofing material
19.In the method of condensation polymerization,
A. low-molecular substances are removed from the high molecular substance
B. the reaction proceeds with an evolution of ammonia
C. the reaction proceeds with an evolution of hydrogen chloride
D. low-molecular substances are removed from the high molecular substance
20.In the cement the compound quickest to react with water, is
A. Tricalcium aluminate
B. Tetra-calcium alumino-ferrite
C. Tricalcium silicate
D. Tricalcium aluminate
21.The initial setting time of lime-pozzolana, is
A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 30 minutes
22.The clay to be used for manufacturing bricks for a large project, is dugout and allowed to weather throughout
A. the monsoon
B. the winter
C. the summer
D. the monsoon
23.Quartzite is a
A. metamorphic rock
B. argillaceous rock
C. calcareous rock
D. metamorphic rock
24.The variety of pig iron used for manufacture of wrought iron, is
A. Bessemer pig
B. Grey or foundry pig
C. White forge pig
D. Bessemer pig
25.Sand stone is
A. sedimentary rock
B. metamorphic rock
C. igneous rock
D. sedimentary rock
26.If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Bessemer pig
27.Stainless steel contains
A. 18% of chromuim and 8% nickel
B. 8% of chromium and 18% of nickel
C. 12% of chromium and 36% of nickel
D. 18% of chromuim and 8% nickel
28.Pick up the hypabyssal rock from the following:
A. Granite
B. Dolerite
C. Basalt
D. Granite
29.Depending on the chemical composition and mechanical properties, iron may be classified as
A. cast iron
B. wrought iron
C. steel
D. cast iron
30.Wrought iron contains carbon about
A. 1.5% to 5.5%
B. 0.5% to 1.75%
C. 0.1% to 0.25%
D. 1.5% to 5.5%
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