Materials and Construction

81. Bearings subjected to light load are made of

1. White metal
2. Phosphorous bronze
3. Monel
4. Silicon bronze

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82. Beehive coke ovens are made of _________ bricks.

1. Silica
2. Fireclay
3. Silicon carbide
4. Corundum

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83. Bell metal is an alloy of

1. Copper & zinc
2. Copper & tin
3. Copper & nickel
4. Zinc & tin

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84. Biological shield in a nuclear power reactor is made of

1. Concrete
2. Steel
3. Cadmium
4. Zircaloy

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85. Bog iron used for the adsorption of H2S from coke oven gas is

1. An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
2. Iron impregnated with resin (usually Bakelite)
3. Carbon free iron
4. None of these

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86. Brass container is suitable for storing

1. Aqueous ammonia
2. Beer
3. H2SO4 (95%)
4. Phosphoric acid (95%)

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87. Brass is an alloy of

1. Nickel and tin
2. Copper and zinc
3. Tin and lead
4. Copper, nickel and zinc

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88. Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its

1. High co-efficient of thermal expansion
2. Low thermal conductivity
3. High corrosion resistance
4. All (A), (B) and (C)

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89. Brine (15% concentration) can be stored in a vessel made of

1. Monel
2. Karbate
3. Cast iron
4. None of these

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90. Brine solution is stored/treated in _________ lined vessels/pipes.

1. Rubber
2. Lead
3. Glass
4. Nickel

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