Materials and Construction

101. Carbon supply in pack carburising process is in the form of

1. Charcoal
2. Calcium carbide
3. Hydrocarbon oil
4. Graphite

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102. Carbon tetrachloride can be stored in a storage vessel made of

1. High silicon iron (14% Si)
2. Tin
3. Stainless steel
4. All (A), (B) and (C)

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103. Cast iron and steel pipes are produced by _________ casting.

1. Die
2. Investment
3. Slush
4. True centrifugal

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104. Cast iron compared to steel is better in

1. Ductility
2. Fluidity & castability
3. Strength
4. Malleability

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105. Cast iron detachable joint is used in _________ pipes.

1. Steel
2. Cast iron
3. Asbestos cement
4. Reinforced cement concrete

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106. Cast iron has

1. High ductility
2. High malleability
3. Very high tensile strength
4. Its elastic limit very close to ultimate breaking strength

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107. Cast iron has very high

1. Compressive strength
2. Ductility
3. Shock resistance
4. Resistance to brittleness

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108. Cast iron is

1. Used for making shock resisting parts
2. Manufactured in cupola and is brittle
3. Having compressive strength more than its tensile strength
4. All (A), (B) & (C)

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109. Cast iron is a _________ material.

1. Brittle
2. Ductile
3. Tough
4. Malleable

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110. Cast iron is having very high

1. Proximity between its elastic limit and ultimate breaking strength
2. Ductility
3. Tensile strength
4. All (A), (B) and (C)

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