3 Pc
Pc
Pc/3
2 Pc Where, Pc = tension in belt due to centrifugal force
A. 3 Pc
Longitudinal stress
Circumferential stress
Shear stress
None of these
Finishing and polishing
Shotpeening
De-carburisation
Electroplating
Spindles of bench vices
Railway carriage couplings
Feed mechanism of machine tools
Screw cutting lathes
l/2
l/√2
l
2 l
0.4 times
0.6 times
0.7 times
0.8 times
Leather
Rubber
Canvas or cotton duck
Balata gum
Normal pitch
Axial pitch
Diametral pitch
Module
8
4
2
6
Length of arc of recess to the circular pitch
Length of path of contact to the circular pitch
Length of arc of contact to the circular pitch
Length of arc of approach to the circular pitch
Belt velocity
Initial belt tension
Arc of contact
All of the above
Friction angle is less than helix angle
Friction angle is more than helix angle
Friction angle is equal to helix angle
Efficiency of screw is 100%
Increasing its shank diameter
Decreasing its shank diameter
Tightening the bolt properly
Making the shank diameter equal to core diameter of thread
Initial tension
External load applied
Sum of the initial tension and external load applied
Initial tension or external load, whichever is greater
Equating tearing resistance of the plate to the shearing resistance of the rivets
Equating tearing resistance of the plate to the crushing resistance of the rivets
Equating shearing resistance to the crushing resistance of the rivets
None of the above
Decreases the power transmitted
Increases the power transmitted
Increase the wrap angle
Increases the belt tension without increasing power transmission
Bottom side of belt as slack side
Top side of belt as slack side
Idler pulley
None of the above
Low
Zero
High
Could be anything
Reduce vibration
Reduce slip
Ensure uniform loading
Ensure proper alignment
p = D sin (90°/T)
p = D sin (120°/T)
p = D sin (180°/T)
p = D sin (360°/T)
Hollow saddle key
Hollow key
Soft key
None of these
50°C above upper critical temperature
50°C below upper critical temperature
50°C above lower critical temperature
50°C below lower critical temperature
d = t
d = 1.6 t
d = 2t
d = 6t
Brown colour
Yellow colour
White colour
Grey colour
Material of the belt
Material of the pulley
Uneven extensions and contractions due to varying tension
All of the above
Half the angle between two inclined faces in axial plane
The angle between the tangent to the pitch helix and the plane of rotation
The angle between the tangent to the pitch helix and an element of the cylinder
None of the above
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
Brittle materials
Ductile materials
Plastic materials
Nonferrous materials
Long column
Short column
Strut
All of these
3 mm
6 mm
8 mm
12 mm
Medium series whose bore is 5 mm
Medium series whose bore is 25 mm
Light series whose bore is 25 mm
Light series whose bore is 5 mm