Category: Machine Design

A. one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B. a slot is cut partly in middle of nut and then slot reduced by tightening screw
C. a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D. through slots are made at top and a cotter-pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end
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. wood-ruff key
B. feather key
C. flat saddle key
D. gib head key
E. hollow saddle key

A. more
B. less
C. same
D. more or less depending on quantum of load
E. unpredictable

A. tightening it properly
B. increasing shank diameter
C. grinding the shank
D. using washer
E. making shank diameter equal to core diameter of thread

A. one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
B. a slot is cut partly is middle of nut and then slot reduced by tightening a screw
C. a hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
D. through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
E. none of the above.

A. ISO metric thread
B. acme thread
C. square thread
D. buttress thread
E. British Association thread

A. wood-ruff key
B. feather key
C. flat saddle key
D. gib head key
E. hollow saddle key

A. to decrease length
B. to increase length
C. unaffected by length
D. other factors would decide same
E. none of the above

A. electroplating
B. polishing
C. coating
D. shot peening
E. heat treating