Mechanical Engineering MCQs

A. Variation in properties of material from point to point in a member
B. Pitting at’points or areas at which loads on a member are applied
C. Abrupt change of section
D. All of the above

A. Be independent of ratio of mass of load w to mass of bar (y)
B. Increase with increase in y
C. Decrease with decrease in y
D. Depend on other considerations

A. Decreasing the cross-section area of’ bar
B. Increasing the cross-section area of bar
C. Remain unaffected with cross-section area
D. Would depend upon other factors

A. Brinell
B. Rockwell
C. Vicker
D. Shore’s sceleroscope

A. Brittle
B. Ductile
C. Elastic
D. Plastic

A. Brittle when cold
B. Brittle when hot
C. Brittle under all conditions
D. Ductile at high temperature

A. 2000-3000 kg/pm2
B. 3000-4000 kg/cm2
C. 4000-4500 kg/cm2
D. 7500-10,000 kg/cm2

A. 1 : l
B. 2:1
C. 3 : 2
D. 2 : 3

A. Is greatly decreased by poor surface conditions
B. Remains same irrespective of surface conditions
C. Depends mainly on core composition
D. Is dependent upon yield strength of material

A. Same
B. Higher
C. Lower
D. Depends on other factors