When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test
When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test
When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test
When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test
B. When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test
A taper key which fits half in the key way of hub and half in the key way of shaft
A taper key which fits in a key way of the hub and is flat on the shaft
A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
Provided in pairs at right angles and each key is to withstand torsion in one direction only
To reduce friction
To facilitate slipping of balls
To prevent the lubricant from flowing out
To maintain the balls at a fixed distance apart
Bending moment only
Twisting moment only
Combined bending moment and twisting moments
Combined action of bending moment, twisting moment and axial thrust
Crown bevel gears
Angular bevel gears
Mitre gears
Internal bevel gears
Woodruff key
Feather key
Flat saddle key
Hollow saddle key
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
0.96
0.97
0.98
0.99
Thick lubricated bearings
Plastic bearings
Antifriction bearings
Thin lubricated bearings
1/sinθ
1/cosθ
1/tanθ
sinθ cosθ
Brinell
Rockwell
Vickers
None of the above
Brittle
Ductile
Elastic
Plastic
One-fourth
One-third
One-half
Double
Dynamic loading
Static loading
Combined static and dynamic loading
Completely reversed loading
45 to 60 %
63 to 70 %
70 to 83 %
80 to 90 %
Electroplating
Polishing
Coating
Shot peening
Increases markedly
Decreases markedly
Remain same
Depends on heat treatment carried out
Centroidal axis
Neutral axis
Inside fibre
Outside fibre
Metric
Buttress
Acme
Square
Tensile strength
Compressive strength
Shear strength
Bending strength
Plastic materials
Brittle materials
Non-ferrous materials
Ductile materials
Increasing its shank diameter
Decreasing its shank diameter
Tightening the bolt properly
Making the shank diameter equal to core diameter of thread
(6V/ π)1/2
(6V/ π)1/3
(6V/ π)2
(6V/ π)3
Partially
Fully
Either A or B
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
Ductile materials
Brittle materials
Elastic materials
All of the above
Elastic strength
Yield strength
Shear strength
None of these
Screw jack
Aeroplane engines
Crane
Steering mechanism
40
50
70
100
124 d
138 d
151 d
168 d
Basic size is 100 mm
Actual size is 100 mm
Difference between the actual size and basic size is 100 mm
None of the above