225. Which of the following has least percentage of carbon
A.Malleable iron
B.Pig iron
C.Stainless steel
D.Wrought iron

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226. Steels containing high percentages of elements other than carbon are classified as
A.Alloy steels
B.Stainless steels
C.Structural steels
D.High carbon steels

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227. The following element is alloyed with high carbon tool steels to increase the resistance to shock
A.Carbon
B.Tungsten
C.Nickel
D.Vanadium

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228. Which of the following is the most ductile material
A.Mild steel
B.Copper
C.Zinc
D.Aluminium

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229. A test commonly applied to steel of unknown quality for identification purposes is the
A.Acid-etch test
B.Spark test
C.Fracture test
D.Dye-penetrant test

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230. Which of the following has maximum malleability
A.Lead
B.Brass
C.Wrought iron
D.Copper

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231. High Speed Steel (H.S.S.) belongs to the category of
A.Low-carbon steel
B.Medium-carbon steel
C.High-carbon steel
D.Alloy steel

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