Building Materials, Third Edition

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xE2p 2w— QVQ e  Eg2econtains copper up to 4 per cent. Less liable to burning the alloy produces light ...

QVR f 2w—— and damp proofing. Its use is restricted in the appliances and connections used for water supplies in h ...

xE2p 2w— QVS used for making valves and bearings. Bell metal is produced by alloying copper (65–45%) to zinc (35–20% ...

QVT f 2w—— is to be rolled or used for galvanising. They should not exceed 0.02 per cent. Zinc, either rolled or c ...

xE2p 2w— QVU bearings. Lead antimony tin alloys containing 10–20% antimony, 5–20% tin and the remainder lead are use ...

QVV f 2w—— resists alkaline corrosion, but gets readily dissolved in nitric acid and aquaregia. The presence of ca ...

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QWH f 2w—— Which of the following is not alloy of tin? (a) Babbitt metal (b) Mangolia metal (c) White metal (d) Pe ...

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g —™2w— — QWQ g—˜ —™  ‚—™  are manufactured from graphite or coke. These have refractoriness above 1700° C a ...

QWR f2w— — to partial or complete devitrification (crystallisation) on cooling. These crystalline areas are extremel ...

g —™2w— — QWS f " A 2 m long and 12 mm diameter blow pipe is dipped in the molten glass and taken out. It is held ve ...

QWT f2w— — g ™—2p  ƒ q— is used for glazing doors, windows and partitions and is obtained by b ...

g —™2w— — QWU r— —   %  — Two or more glass plates are sandwiched by a tinted plastic inner layer. It pr ...

QWV f2w— — ISS qveƒƒ2‡yyv When silicate rock or flint is melted (1650° C) with a small quantity of calcareous matte ...

g —™2w— — QWW p2ISR „&— 2i()—22ƒyR2€— These three inversions affect the use of silica as a refract ...

RHH f2w— — ISW ivig„‚sgev2€‚y€i‚„siƒ2yp2gi‚ewsg2€reƒiƒ Ceramic materials have no free electrons so they have low el ...

g —™2w— — RHI The example of glass maker ’s soap is (a) nickel oxide (b) cobalt oxide (c) manganese dioxide (d) cullets ...