Category: Machine Design

Which is correct statement ?

A. very serious in brittle materials and less serious in ductile materials
B. very serious in ductile materials and less serious in brittle materials
C. equally serious in both types of materials
D. seriousness would depend on other factors
E. none of the above

Which is correct statement ?
A. very serious in brittle materials and less serious in ductile materials
B. very serious in ductile materials and less serious in brittle materials
C. equally serious in both types of materials
D. seriousness would depend on other factors
E. none of the above

A. self locking bolts
B. designed for shock load
C. used in aircraft application
D. provided with hexagonal depression in head
E. uniform strength bolts

A. 10°
B. 20°
C. 30°
D. 45°
E. 60°.

A. reducing stress concentration
B. ease of manufacture
C. safety
D. fullering and caulking
E. all 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

A. Brinell
B. Rockwell
C. Vicker
D. Shore’s sceleroscope
E. none of the above

A. the oil film pressure is generated only by the rotation of the journal
B. the oil film is maintained by supplying oil under pressure
C. do not require external supply of lubricant
D. grease required to be applied after some intervals
E. none of the above

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
E. none of the above

A. on both the sides
B. on one side only
C. on none of the sides
D. may be provided anywhere
E. none of the above