Engineering Materials MCQ Questions & Answers | Mechanical Engineering

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41.
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

A. Babbitt metal

B. Monel metal

C. Nichrome

D. Phosphor bronze

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42.
In the lower part of the blast furnace (zone of fusion), the temperature is

A. 400° to 700°C

B. 800°C to 1000°C

C. 1200°C to 1300°C

D. 1500°C to 1700°C

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43.
The heat treatment process used for softening hardened steel is

A. Carburising

B. Normalizing

C. Annealing

D. Tempering

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44.
Which of the following impurity in cast iron makes it hard and brittle?

A. Silicon

B. Sulphur

C. Manganese

D. Phosphorus

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45.
An engineer's hammer is made of

A. Cast iron

B. Forged steel

C. Mild steel

D. High carbon steel

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