Butt joint with single cover plate
Butt joint with double cover plate
Lap joint with one ring overlapping the other
Any one of the above
B. Butt joint with double cover plate
Leather
Rubber
Canvas or cotton duck
Balata gum
(1/2) × √(σ² + 4τ²)
√(σ² + 4τ²)
(1/2) × [σ + √(σ² + 4τ²)]
σ + √(σ² + 4τ²)
d + 17 mm
2d + 13 mm
2d + 20 mm
3.5d
One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly is middle of nut and then slot reduced by tightening a screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end
Tearing strength of plate (Pt)
Shearing strength of rivet (Ps)
Crushing strength of rivet (Pc)
Least value of Pt Ps and Pc
Helix angle
Pressure angle
Pitch lead angle
None of these
Equal to
Less than
Greater than
None of these
Provide cooling action
Lubricate the dies
Help removes chips
All of the above
To reduce friction
To facilitate slipping of balls
To prevent the lubricant from flowing out
To maintain the balls at a fixed distance apart
Base circle
Pitch circle
Addendum circle
Dedendum circle
Increases
Decreases
Remains unchanged
None of these
Young's modulus
Coefficient of elasticity
Elastic limit
Endurance limit
M6
M8
M6 - 8d
M8 - 6d
Guest's theory
Rankine's theory
St Venant's theory
Von Mises theory
Is less flexible
Has a much smaller load carrying capacity
Does not provide much warning before failure
Provides much greater time for remedial action before failure
Increases
Decreases
Remain same
None of these
X-axis as neutral axis
Y-axis as neutral axis
X-axis or Y-axis as neutral axis
Z-axis
Which are perfectly aligned
Which are not in exact alignment
Have lateral misalignment
Whose axes intersect at a small angle
Cold working
Shot peening
Grinding and lapping surface
Hot working
2d
3d
4d
5d
Bolt
Tap bolt
Stud
None of these
White metal
Silicon bronze
Monel metal
Phosphor bronze
(6V/ π)1/2
(6V/ π)1/3
(6V/ π)2
(6V/ π)3
[(√P1 + √P2)/2]²
P1 + P2
2 × (P1 + P2)
[2 × (P1 + P2)] + Pc Where Pc is centrifugal tension
Tension
Shear
Compression
All of the above
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
Mild steel
Aluminium
Brass
Cast iron
Variations in load acting on a member
Variations in properties of materials in a member
Abrupt change of cross-section
All of these
Increasing velocity ratio
For applying tension
Changing the direction of motion of belt
All of these
W/2
2W/3
W/9
8W/9