For making spiral staircases, ideal material is
A) pig iron
B) cast iron
C) wrought iron
D) steel
Correct Answer:
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Q14: Water absorption of vitrified tiles is not
Q15: To make terracotta porous, the following is
Q16: By calcining and smelting iron ores, a
Q17: The colour of cast iron is
A)grey
B)white
C)both grey
Q18: The compressive and tensile strength of cast
Q20: Purest form of iron is
A)pig iron
B)cast iron
C)wrought
Q21: Carbon content in wrought iron is
A)0.15%
B)0.25 to
Q22: The ratio of tensile strength to compressive
Q23: Ribs are made on steel wires to
Q24: The property of metal enabling it to
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