Increasing the length of bar
Decreasing the cross-sectional area of the bar
Decreasing the modulus of elasticity of the bar
All of the above
D. All of the above
Pitch diameter
Inside diameter
Outside diameter
Height
Zero film bearing
Boundary lubricated bearing
Hydrodynamic lubricated bearing
Hydrostatic lubricated bearing
(π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n
3 × (π/4) d² × τ × n
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
Determining brittleness
Protecting metal against corrosion
Protecting metal against wear and tear
Experimental stress analysis
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 parts
Provided with detachable caps
Knuckle joint
Cotter joint
Oldham coupling
Universal joint
Angular bevel gears
Mitre gears
Crown Bevel gears
Internal bevel gears
Woodruff key
Feather key
Flat saddle key
Gib head key
Shaft B is better than shaft A
Shaft A is better than shaft B
Both the shafts are equally good
None of these
Tensile stress
Compressive stress
Shear stress
None of these
Addendum
Dedendum
Clearance
Working depth
Acts when external load is applied
Becomes zero when external load is removed
Is independent of external loads
Is always harmful
8
6
4
10
Initial tension
External load applied
Relative elastic yielding (springness) of the bolt and the connected member
All of the above
Screw cutting lathes
Feed mechanisms
Spindles of bench vices
Railway carriage couplings
10
15
20
25
Tensile strength
Compressive strength
Shear strength
Bending strength
Effective tension is equal to centrifugal tension
Effective tension is half of centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Driving tension on tight side is twice the centrifugal tension
Hot piercing
Extrusion
Cold peening
Cold heading
Heavier
Lighter
Moderate
None of these
40°
122°
136°
152°
Equal to
Less than
Greater than
None of these
Directly as load
Inversely as square of load
Inversely as cube of load
Inversely as fourth power of load
In a direction perpendicular to the cam axis
In a direction parallel to the cam axis
In any direction irrespective of cam axis
Along the cam axis
The efficiency of a self locking screw can not be more than 50%
The efficiency of Acme (trapezoidal) thread is less than that of a square thread
If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
(A) and (B) Only
Carbon content is 2%
Maximum compressive strength is 200 N/mm²
Minimum tensile strength is 200 N/mm²
Maximum shear strength is 200 N/mm²
d + 17 mm
2d + 13 mm
2d + 20 mm
3.5d
Best method
Extremely hazardous
Has no effect as regards fatigue strength
Cheapest method
Brown colour
Yellow colour
White colour
Grey colour