Tensile stress
Bending stress
Bearing stress
Shear stress
C. Bearing stress
Woodruff key
Feather key
Flat saddle key
Hollow saddle key
Knuckle threads
Square threads
Acme threads
Buttress threads
Twice
Four times
Eight times
Sixteen times
0.5 to 1
1 to 2
3 to 5
5 to 10
d.t.τu
πd.t.τu
π/4 × d².τu
π/4 × d² × t.τu
Material of the belt
Material of the pulley
Uneven extensions and contractions due to varying tension
All of the above
Effect of temperature on belt
Material of belt
Unequal extensions in the belt due to tight and slack side tensions
Stresses beyond elastic limit of belt material
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between two parts
Similar to stud
Brittle materials
Ductile materials
Brittle as well as ductile materials
Elastic materials
Decreasing the cross-section area of bar
Increasing the cross-section area of bar
Remain unaffected with cross-section area
Would depend upon other factors
Repeated stress
Yield stress
Fluctuating stress
Alternating stress
Brinell
Rockwell
Vickers
None of the above
Nil or lightest
Maximum
Average
Any one 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
Plastic materials
Brittle materials
Non-ferrous materials
Ductile materials
Above
Below
At
None of these
Very fine threads
High efficiency
Low efficiency
Strong teeth
Belt velocity
Initial belt tension
Arc of contact
All of the above
It is subjected to a higher cyclic loading than the outer side
It is subjected to a higher stress than the outer side
It is more stretched than the outer side during the manufacturing process
It has a lower curvature than the outer side
Loose in shaft and tight in hub
Tight in shaft and loose in hub
Tight in both shaft and hub
Loose in both shaft and hub
Brittle
Ductile
Elastic
Plastic
1420 d
1680 d
2080 d
2840 d
Gerber relation
Soderberg relation
Goodman relation
None of these
(π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n
3 × (π/4) d² × τ × n
Tearing strength of plate (Pt)
Shearing strength of rivet (Ps)
Crushing strength of rivet (Pc)
Least value of Pt Ps and Pc
A parallel sunk key is a taperless key
A parallel sunk key may be rectangular or square in cross-section
A flat saddle key is a taper key which fits in a key way of the hub and is flat on the shaft
All of the above
Same
Higher
Lower
None of these
Short bearing
Long bearing
Medium bearing
Square bearing
Variations in load acting on a member
Variations in properties of materials in a member
Abrupt change of cross-section
All of these
Both sides of the actual size
One side of the actual size
One side of the nominal size
Both sides of the nominal size