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.Management Sciences
Category: Machine Design
The rated life of a bearing varies___________________?
A. directly as load
B. inversely as square of load
C. inversely as cube of load
D. inversely as fourth power of load
E. none of the above
Buttress threads are usually found on____________________?
A. screw cutting lathes
B. feed mechanisms
C. spindles of bench vices
D. screw jack
E. railway carriage couplings
Plastic flow in ductile materials_____________________?
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
In composite or reverse laid ropes___________________?
A. direction of twist of wires in strands is opposite to the direction of twist of strands
B. direction of twist of wires and strands are same
C. wires in two adjacent strands are twisted in opposite direction
D. wires are not twisted
E. none of the above
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of____________?
A. 0.25
B. 0.45
C. 0.55
D. 0.65
E. 0.75
In order to obtain bolt of uniform strength____________________?
A. increase shank diameter
B. increase its length
C. drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
D. tighten die bolt properly
E. all of the above
A tube has the following advantage over pipe_________________?
A. lighter and easier to handle
B. greater shock absorption
C. smoother inside walls
D. all of the above
E. none of the above
When a nut is tightened by plaping a washer below it, the bolt will be subjected to following type of loads___________________?
A. compression
B. tension
C. shear
D. combined loads
E. all of the above
In hydrodynamic bearings_____________________?
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 is used for lubrication
E. none of the above
Set screws are_________________?
A. similar to small size tap bolts except that a greater variety of shapes of heads are available
B. slotted for a screw driver and generally used with a nut
C. used to prevent relative motion be-tween parts
D. similar to stud
E. none of the above
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