Mechanical Engineering MCQs

A. Acts as deoxidiser
B. Reduces the grain size
C. Decreases tensile strength and hardness
D. Lowers the toughness and transverse ductility

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

A. Decrease
B. Increase
C. Remain constant
D. First increase and then decrease

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

A. 1010
B. To16
C. 1022
D. 1040

A. Linear
B. Non-linear
C. Plastic
D. No fixed relationship

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

A. Room temperature
B. Above melting point
C. Between 1400°c and 1539°c
D. Between 910°c and 1400°c

A. Below 10°k
B. Above 100°k
C. Around 0°c
D. Around 100°c