Neutral surface
Upper surface
Lower surface
None of these
A. Neutral surface
σ [1 + (b/2a)]
σ [1 + (2a/b)]
σ [1 + (b/3a)]
σ [1 + (3a/b)]
0.96
0.97
0.98
0.99
Transmission
Machine
Machine frame
None of these
Major diameter
Minor diameter
Pitch diameter
Core diameter
Knuckle joint
Cotter joint
Oldham coupling
Universal joint
Equal to
Less than
Greater than
None of these
8
6
4
10
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
T sec3φ
T sec²φ
T/sec3φ
T cosecφ
10°-20°
30°-40°
40°-60°
60°-80°
Stiffness
Ductility
Resilience
Plasticity
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 parts
Provided with detachable caps
Mild steel
Aluminium
Brass
Cast iron
Maximum stress to the endurance limit
Nominal stress to the endurance limit
Maximum stress to the nominal stress
Nominal stress to the maximum stress
Right hand with same pitch
Left hand with same pitch
Could be left or right hand
Right hand with fine pitch
(1 - sinφ)/ (1 + sinφ)
(1 + sinφ)/ (1 - sinφ)
(1 - sinφ)/ (1 + cosφ)
(1 + cosφ)/ (1 - sinφ)
Square
Acme
Buttress
BSW
Static load
Dynamic load
Static as well as dynamic load
Completely reversed load
Ductile materials
Brittle materials
Elastic materials
All of the above
Elastic limit
Strain
Factor of safety
Bulk modulus
Varies linearly
Is uniform throughout
Varies exponentially, being more near the torque-input end
Varies exponentially, being less near the torque-input end
Electroplating
Polishing
Coating
Shot peening
Increasing velocity ratio
For applying tension
Changing the direction of motion of belt
All of these
Axial load only
Both radial and axial loads and the ratio of these being greater than unity
Radial load only
Both radial and axial loads and the ratio of these being less than unity
Increasing its shank diameter
Increasing its length
Decreasing its shank diameter
Decreasing its length
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
0.5 times
Equal to
2 times
Double
0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.75 t for both the straps on the inside and outside
0.625 t for both the straps on the inside and outside
V-belt drive
Rope drive
Crossed flat belt drive
Chain drive
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