Engineering Materials MCQ Questions & Answers | Mechanical Engineering Page-10 section-3

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46.
The alloying element which can replace tungsten in high speed steels is

A. Nickel

B. Vanadium

C. Cobalt

D. Molybdenum

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47.
Grey cast iron

A. Contains 1.7 to 3.5% carbon in Free State and is obtained by the slow cooling of molten cast iron

B. Is also known as chilled cast iron is obtained by cooling rapidly. It is almost unmachinable

C. Is produced by annealing process. I is soft, tough and easily machined metal

D. Is produced by small additions o magnesium (or cerium) in the ladle Graphite is in nodular or spheroidal form and is well dispersed throughout the material

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48.
Which of the following element results in presence of free graphite in C.I.?

A. Carbon

B. Sulphur

C. Silicon

D. Manganese

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49.
The percentage carbon content in wrought iron is about

A. 0.02

B. 0.1

C. 02

D. 0.4

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50.
Age-hardening is related with

A. Stainless steel

B. Gun metal

C. German silver

D. Duralumin

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Engineering Materials MCQ Questions & Answers | Mechanical Engineering

46. The alloying element which can replace tungsten in high speed steels is

Answer & Solution

47. Grey cast iron

Answer & Solution

48. Which of the following element results in presence of free graphite in C.I.?

Answer & Solution

49. The percentage carbon content in wrought iron is about

Answer & Solution

50. Age-hardening is related with

Answer & Solution

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46.
The alloying element which can replace tungsten in high speed steels is

47.
Grey cast iron

48.
Which of the following element results in presence of free graphite in C.I.?

49.
The percentage carbon content in wrought iron is about

50.
Age-hardening is related with