Regain its original shape after deformation when the external forces are removed
Draw into wires by the application of a tensile force
Resist fracture due to high impact loads
Retain deformation produced under load permanently
D. Retain deformation produced under load permanently
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
1.2 d
1.6 d
2d
2.5 d
V-belt drive
Rope drive
Crossed flat belt drive
Chain drive
Flaring
Brazing
Soft soldering
Fusion welding
Ductile materials
Brittle materials
Elastic materials
All of the above
p = D sin (90°/T)
p = D sin (120°/T)
p = D sin (180°/T)
p = D sin (360°/T)
Pulley is made the weakest
Key is made the weakest
Key is made the strongest
All the three are designed for equal strength
Increases
Decreases
Remain same
None of these
Self locking bolt
Same as stud
Provided with hexagonal depression in head
Used in high speed components
2
4
8
16
The pitch of the thread is 24 mm and depth is 2 mm
Cross-sectional area of the threads is 24 mm²
The nominal diameter of bolt is 24 mm and pitch is 2 mm
The effective diameter of bolt is 24 mm and there are 2 threads per cm
Repeated stress
Yield stress
Fluctuating stress
Alternating stress
Initial tension
External load applied
Sum of the initial tension and external load applied
Initial tension or external load, whichever is greater
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
40°
45°
38°
60°
3 mm
6 mm
8 mm
12 mm
Heavier
Lighter
Moderate
None of these
Spur gearing
Helical gearing
Bevel gearing
Spiral gearing
(6V/ π)1/2
(6V/ π)1/3
(6V/ π)2
(6V/ π)3
Both sides of the actual size
One side of the actual size
One side of the nominal size
Both sides of the nominal size
Provide cushioning effect
Provide bearing area
Absorb shocks and vibrations
Provide smooth surface in place of rough surface
0.70
0.25
0.40
0.55
Young's modulus
Coefficient of elasticity
Elastic limit
Endurance limit
For conveying steam
In water and sewage systems
In pressure lubrication systems on prime movers
All of the above
Heavy load
Loose belt
Driving pulley too small
All of the above
Directly proportional to (shaft diameter)²
Inversely proportional to (shaft diameter)²
Directly proportional to (shaft diameter)⁴
Inversely proportional to (shaft diameter)⁴
Lower critical temperature
Upper critical temperature
Recrystallisation temperature
None of these
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
Increasing velocity ratio
For applying tension
Changing the direction of motion of belt
All of these
F/bh
3F/2bh
2F/bh
4F/bh