Category: Machine Design

A. at bottom
B. at sides only
C. both at bottom and sides
D. could touch anywhere
E. none of the above

A. 0.33
B. 0.4
C. 0.5
D. 0.55
E. 0.6

A. 28
B. 8/2
C. 48
D. 8/4
E. none of the above

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 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 spitted and bent in reverse direction at other end
E. none of the above

A. vpE
B. vVvF
C. WpE/2
D. IvHpE
E. none of the above, where E = modulus of elasticity and p = mass density

A. 1 in 5
B. 1 in 10
C. 1 in 24
D. 1 in 40
E. 1 in 50

A. 2000-3000 kg/pm2
B. 3000-4000 kg/cm2
C. 4000-4500 kg/cm2
D. 7500-10,000 kg/cm2
E. 10,000-15,000 kg/cm2

A. right hand threads on bout ends
B. left hand threads on both ends
C. left hand threads on one end and right hand threads on other end
D. no threads
E. threads in middle portion

A. 18
B. 16
C. 20
D. 22
E. 14

A. metal strength by cycling
B. metal hardness by surface treatment
C. metal resistance to corrosion by coating
D. fatigue limit by overstressing the metal by successively increasing loadings
E. none of the above