- (A) austenite
- (B) martensite
- (C) pearlite
- (D) cementite
- (E) all of the above
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- (A) improves wear resistance, cuttinability and toughness
- (B) refines grain size and produces les tendency to carburisation, improve corrosion and heat resistant proper ties
- (C) improves cutting ability and reduce hardenability
- (D) gives ductility, toughness, tensile strength and anti corrosion property:
- (E) none of the above
- (A) adding carbon up to 2.8%
- (B) adding carbon up to 6.3%
- (C) adding carbon up to 0.83%
- (D) adding small quantities of copper
- (E) adding copper and carbon
- (A) aluminium
- (B) low carbon steel
- (C) medium carbon steel
- (D) high carbon steel
- (E) cast iron
- (A) hot hardness
- (B) toughness
- (C) wear resistance
- (D) sharp cutting edge
- (E) cold hardness
- (A) acts as deoxidiser
- (B) reduces the grain size
- (C) decreases tensile strength and hardness
- (D) lowers the toughness and transverse ductility
- (E) increases hardness
- (A) decrease
- (B) increase
- (C) remain constant
- (D) first increase and then decrease
- (E) first decrease and then increase
- (A) along the lines of slag distribution
- (B) perpendicular to lines of slag distribution
- (C) uniform in all directions
- (D) unpredictable
- (E) none of the above
- (A) cast iron
- (B) high speed steel
- (C) all non-ferrous materials
- (D) all of the above
- (E) none of the above
- (A) cast iron
- (B) mild steel
- (C) stainless steel
- (D) carbon-chrome steel
- (E) high carbon steel
