Engineering Materials - Interview Questions | Exam2Win

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141. Corrosion resistance of steel is increased by addition of

A. chromium and nickel

B. sulphur, phosphorus, lead

C. vanadium, aluminium

D. tungsten, molybdenum, vanadium, chromium

E. zinc.

Explanation:

142. Eutectoid steel contains following percentage of carbon

A. 0.02%

B. 0.3%

C. 0.63%

D. 0.8%

E. 1.2%.

Explanation:

143. A cold chisel is made of

A. mild steel

B. cast iron

C. H.S.S.

D. high carbon

E. german silver.

Explanation:

144. The most effective inhibitor of grain growth, when added in small quantities is

A. carbon

B. vanadium

C. manganese

D. cobalt

E. copper.

Explanation:

145. German silver is an alloy of

A. silver and some impurities

B. refined silver

C. nickel, copper and zinc

D. nickel and copper

E. silver and gold.

Explanation: