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
A. The oil film pressure is generated only by the rotation of the journal
45 to 60 %
63 to 70 %
70 to 83 %
80 to 90 %
Mild steel
Aluminium
Brass
Cast iron
(6V/ π)1/2
(6V/ π)1/3
(6V/ π)2
(6V/ π)3
Zero at the centroidal axis
Zero at the point other than centroidal axis
Maximum at the neutral axis
None of these
2WD3n/Gd⁴
4WD3n/Gd⁴
8WD3n/Gd⁴
16WD3n/Gd⁴
Right hand with same pitch
Left hand with same pitch
Could be left or right hand
Right hand with fine pitch
80 kN/mm²
100 kN/mm²
110 kN/mm²
210 kN/mm²
Electroplating
Polishing
Coating
Shot peening
Cast iron
Wrought iron
Mild steel
Aluminium
One-fourth
One-third
One-half
Double
Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Boundary lubricated bearing
Zero film bearing
Increasing its shank diameter
Increasing its length
Decreasing its shank diameter
Decreasing its length
2μ sinθ/(θ + sinθ)
μ sinθ/(2θ + sin 2θ)
4μ sinθ/(θ + sinθ)
4μ sinθ/(2θ + sin 2θ)
Torque in each shaft is the same
Shear stress in each shaft is the same
Angle of twist of each shaft is the same
Torsional stiffness of each shaft is the same
Direct tensile stress
Direct compressive stress
Direct bending stress
Direct shear stress
Very serious in brittle materials and less serious in ductile materials
Very serious in ductile materials and less serious in brittle materials
Equally serious in both types of materials
Seriousness would depend on other factors
Pitch circle diameter × cosφ
Addendum circle diameter × cosφ
Clearance circle diameter × cosφ
Pitch circle diameter × sinφ
Metal strength by cycling
Metal hardness by surface treatment
Metal resistance to corrosion by coating
Fatigue limit by overstressing the metal by successively increasing loadings
In a direction parallel to the cam axis
In a direction perpendicular to the cam axis
In any direction irrespective of cam axis
Along the cam axis
Lame's equation
Birnie's equation
Clavarinos' equation
All of these
Ratio of coil diameter to wire diameter
Load required to produce unit deflection
Its capability of storing energy
Its ability to absorb shocks
Low
High
Moderate
None of these
8
4
2
6
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft
(k₁ k₂)/ (k₁ + k₂)
(k₁ - k₂)/ (k₁ + k₂)
(k₁ + k₂)/ (k₁ k₂)
(k₁ - k₂)/ (k₁ k₂)
Bolts
Keys
Cotters
Rivets
Measure forces
Apply forces
Store energy
All of these
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
Less than
Equal to
More than
None of these
Equal to
Less than
Greater than
None of these