208) Three basic raw materials which are needed in large quantities for production of steel are

iron ore, coal and sulphur

iron ore, carbon and sulphur

iron ore, coal and lime stone

iron ore, carbon and lime stone

Answer is:

iron ore, coal and lime stone

Structural Engineering I MCQ with Answers

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209) Compared to mild steel, cast iron has i) high compressive strength ii)high tensile strength iii)low compressive strength iv)low tensile strength The correct answer is

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i)and(iv)

Answer is:

(i)and(iv)

210) Which of the following gradients exerts maximum influence on properties of steel

iron

carbon

manganese

sulphur

Answer is:

carbon

211) Which of the following is the purest form of iron ?

cast iron

wrought iron

mild steel

high carbon steel

Answer is:

wrought iron

Explanation:

Wrought Iron is the purest form of iron; although it may contain traces of carbon. It is usually made by ‘‘puddling process’’. It is very costly and its use has been almost totally replaced by cheaper steel. However, for some components like chain-links and Crane-hooks wrought iron is still the preferred raw material.