A hot short metal is_________________?
A. brittle when cold
B. brittle when hot
C. brittle under all conditions
D. ductile at high temperature
E. hard when hot
A hot short metal is_________________? Read More »
Machine Design A. brittle when cold
B. brittle when hot
C. brittle under all conditions
D. ductile at high temperature
E. hard when hot
A hot short metal is_________________? Read More »
Machine Design A. brittle
B. ductile
C. elastic
D. plastic
E. tough
A. Brinell
B. Rockwell
C. Vicker
D. Shore’s sceleroscope
E. none of the above
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
E. none 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
E. none of the above
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
E. none of the above
Stress concentration is caused due to_____________________? Read More »
Machine Design A. increases the seriousness of static load-ing stress concentration
B. lessens the seriousness of static load¬ing stress concentration
C. has no effect on it
D. depends on other considerations
E. none of the above
Plastic flow in ductile materials_____________________? Read More »
Machine Design A. electroplating
B. polishing
C. coating
D. shot peening
E. heat treating
The fatigue life of a part can be improved by_____________________? Read More »
Machine Design A. ductile materials
B. brittle materials
C. equally serious in both cases
D. depends on other factors
E. unpredictable
Stress concentration in cyclic loading is more serious in__________________? Read More »
Machine Design A. cold working
B. shot peening
C. grinding and lapg surface
D. hot working
E. using gradual changes of section
Fatigue strength can be increased by__________________? Read More »
Machine Design