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
Related Mcqs:
- If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?
A. vpE
B. vVvF
C. WpE/2
D. IvHpE
E. none of the above, where E = modulus of elasticity and p = mass density - If a load W is applied instantaneously on a bar; then the stress induced in bar will___________________?
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 - Other method of reducing shock load in the above case can be_________________?
A. to decrease length
B. to increase length
C. unaffected by length
D. other factors would decide same
E. none of the above - The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be________________?
A. 28
B. 8/2
C. 48
D. 8/4
E. none of the above - The shock absorbing capacity of a bolt can be increased by___________________?
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 - When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at_______________?
A. shank
B. head
C. in the middle
D. at the thread
E. anywhere in the bolt - Elastic nut is a locking device in which__________________?
A. one small 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. hard fiber or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed 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 other end
E. none of the above - The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?
A. same in both cases
B. 2 times more
C. 3 times more
D. 4 times more
E. unpredictable - At low temperatures (say 75°C) the notched-bar impact value of steel____________________?
A. increases markedly
B. decreases markedly
C. remains same
D. depends on heat treatment carried out
E. none of the above - The strap end of a connecting rod of steam engine is joined by_________________?
A. gib of cotter joint
B. sleeve and cotter joint
C. spigot socket cotter joint
D. knuckle joint
E. universal coupling
