Engineering Materials

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

A. creep
B. fatigue
C. endurance
D. plastic deformation
E. non-plastic deformation

A. 1010
B. TO16
C. 1022
D. 1040
E. 1052

A. linear
B. non-linear
C. plastic
D. no fixed relationship
E. unpredictable behaviour

A. at which crystals first start forming from molten metal when it is cooled
B. at which new spherical crystals first begin to form from the old deformed one when a strained metal is heated
C. at which change of allotropic form takes place
D. at which crystals grow bigger in size
E. at which crystals are destroyed on heating