Axial load plus stress due to bending
Acceleration/retardation of masses plus stress due to bending
Axial load plus stress due to acceleration/retardation
Bending plus stress due to acceleration/retardation
A. Axial load plus stress due to bending
Nil or lightest
Maximum
Average
Any one of the above
External load applied
Initial tension due to tightening of the bolt
Relative elastic yielding of the bolt and the connected members
All of the above
45 to 60 %
63 to 70 %
70 to 83 %
80 to 90 %
More
Less
Same
More or less depending on quantum of load
Increases the seriousness of static loading stress concentration
Lessens the seriousness of static loading stress concentration
Has no effect on it
Depends on other considerations
Tightening it properly
Increasing shank diameter
Grinding the shank
Making shank diameter equal to core diameter of thread.
10 to 20 %
20 to 30 %
30 to 40 %
40 to 50 %
Material of belt and pulley
Slip of belt
Speed of belt
All of these
Effect of temperature on belt
Material of belt
Unequal extensions in the belt due to tight and slack side tensions
Stresses beyond elastic limit of belt material
Directly proportional to the polar moment of inertia and to the distance of the point from the axis
Directly proportional to the applied torque and inversely proportional to the polar moment of inertia
Directly proportional to the applied torque and the polar moment of inertia
Inversely proportional to the applied torque and the polar moment of inertia
Longitudinal stress
Shear stress
Circumferential stress
None of these
Lower critical temperature
Upper critical temperature
Recrystallisation temperature
None of these
Electroplating
Polishing
Coating
Shot peening
White metal
Silicon bronze
Monel metal
Phosphor bronze
Porosity of the metal is largely eliminated
Grain structure of the metal is refined
Mechanical properties are improved due of refinement of grains
All of the above
Half
Twice
Thrice
None of these
Static load
Dynamic load
Impact load
Completely reversed load
Yes
No
Sometimes
Rarely
Best method
Extremely hazardous
Has no effect as regards fatigue strength
Cheapest method
Increases linearly
Decreases linearly
Remains same
Increases exponentially
Twice
Four times
Eight times
Sixteen times
(1 - sinφ)/ (1 + sinφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 + cosφ)/ (1 - sinφ)
Uniform velocity
Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion
Has a head on one end and a nut fitted to the other
Has head at one end and other end fits into a tapped hole in the other part to be joined
Has both the ends threaded
Has pointed threads
120°
180°
270°
360°
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between two parts
Similar to stud
Open belt drive transmits more power than crossed belt drive
Crossed belt drive transmits more power than open belt drive
Open and crossed belt drives transmit same power
Power transmission does not depend upon open and crossed types of constructions
Equal to
Less than
Greater than
None of these
Metric
Buttress
Acme
Square
Tension
Shear
Compression
All of the above