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MCQs 1: What is the effect of increased carbon content on chilled cast iron?

Chilling depth increases Hardness of chilled zone increases Both a. and b. None of the above
Answer Explanation

MCQs 2: Which of the following elements increase/s chilled depth for chilled cast irons?

Silicon Manganese Manganese sulphide All of the above
Answer Explanation

MCQs 3: Rosettes of tempered carbon in the matrix of ferrite are observed in the microstructure of _____

gray cast iron spheroidal cast iron malleable cast iron none of the above
Answer Explanation

MCQs 4: Which desulphurising agent is used to remove sulphur from iron during melting?

Calcium carbide Sodium carbonate Soda ash All of the above
Answer Explanation

MCQs 5: Why is gray cast iron annealed?

Graphitize carbide Decrease ductility Both a. and b. None of the above
Answer Explanation

MCQs 6: The solubility of tin in copper above 580°C _______

decreases increases remains constant none of the above
Answer Explanation

MCQs 7: Which of the following cold working operations are suitable for α brass?

Cold rolling Deep drawing Both a. and b. None of the above
Answer Explanation

MCQs 8: Inconol nickel alloy contains _________

75% Ni, 15% Cr and 9% Fe 75% Ni, 15% Cr and 9% Al 75% Ni, 15% Cr and 9% Mg None of the above
Answer Explanation

MCQs 9: A bearing material should not possess the characteristic of high ______.

coefficient of friction hardness melting point thermal conductivity
Answer Explanation

MCQs 10: The alloy of Ti + 5% Al, + 2.5 Sn has _______.

low temperature stability low strength good corrosion all of the above
Answer Explanation

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