A. high maehinability
B. low melting point
C. high tensile strength
D. good fluidity
E. all of the above
A. austenite
B. martensite
C. pearlite
D. cementite
E. all of the above
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. ability to undergo large permanent deformations in compression
B. ability to recover its original form
C. ability to undergo large permanent deformations in tension
D. all of the above
E. none of the above
A. by forming a bulge (l>) by shearing along oblique plane
B. in direction perpendicular to application of load
C. by crushing into thousands of pieces
D. none of the above