Euler's formula
Rankine's formula
Johnson's straight line formula
Johnson's parabolic formula
B. Rankine's formula
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
Rectangular
Elliptical
I-section
Any one of these
√2P/s.l
P/2.s.l
P/√2.s.l
2P/s.l
Working depth
Clearance
Backlash
Face width
2/8
8/2
4/8
8/4
Effective
Smallest
Largest
None of these
Diameter of both the shafts is same
Angle of twist of both the shafts is same
Material of both the shafts is same
Twisting moment of both the shafts is same
10°-20°
30°-40°
40°-60°
60°-80°
80 kN/mm²
100 kN/mm²
110 kN/mm²
210 kN/mm²
0.124 - (0.684/T)
0.154 - (0.912/T)
0.175 - (0.841/T)
None of these
The Oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease is used for lubrication
Woodruff key
Feather key
Flat saddle key
Gib head key
Woodruff key
Feather key
Flat saddle key
Hollow saddle key
Only the broken belt is replaced
The entire set of belts is replaced
The broken belt and the belt on either side of it, is replaced
The broken belt need not to be replaced
1 kN-m
2 kN-m
3 kN-m
4 kN-m
Neutral surface
Upper surface
Lower surface
None of these
30°
45°
60°
80°
Partially
Fully
Either A or B
None of these
Margin
Pitch
Back pitch
Diagonal pitch
More
Less
Same
None of these
Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
Keeping the core diameter smaller than the diameter of the unthreaded portion
Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
None of the above
Direction of twist of wires in strands is opposite to the direction of twist of strands
Direction of twist of wires and strands are same
Wires in two adjacent strands are twisted in opposite direction
Wires are not twisted
Ductile materials
Brittle materials
Equally serious in both cases
Depends on other factors
0.75/ (0.75 + √v)
3/ (3 + v)
4.5/ (4.5 + v)
6/ (6 + v)
4
6
8
10
Determining brittleness
Protecting metal against corrosion
Protecting metal against wear and tear
Experimental stress analysis
Mild steel
High speed steel
Stainless steel
Aluminium
Equal to
Less than
Greater than
None of these
0.45
0.55
0.65
0.75
Increases markedly
Decreases markedly
Remain same
Depends on heat treatment carried out