Very serious in brittle materials and less serious in ductile materials
Very serious in ductile materials and less serious in brittle materials
Equally serious in both types of materials
Seriousness would depend on other factors
C. Equally serious in both types of materials
More
Less
Same
More or less depending on quantum of load
Tensile stress
Compressive stress
Shear stress
None of these
(Sum of base circle radii)/cosφ
(Difference of base circle radii)/cosφ
(Sum of pitch circle radii)/cosφ
(Difference of pitch circle radii)/cosφ
d
1.5 d
2.5 d
2 d
More than 50 %
Less than 50 %
Equal to 50 %
None of these
8
6
4
2
Right hand
Left hand
Both A and B
None of these
Master leaf
Lower leaf
Upper leaf
None of these
Reduce vibration
Reduce slip
Ensure uniform loading
Ensure proper alignment
Free from corrosion
Stronger in tension
Free from stress
Leak-proof
Is just sufficient to hold parts together
Approaches yield point
Is 50% of yield point
Is about yield point divided by safety factor
20 to 30%
10 to 20%
30 to 40%
40 to 50%
3 Pc
Pc
Pc/3
2 Pc Where, Pc = tension in belt due to centrifugal force
Decreases the power transmitted
Increases the power transmitted
Increase the wrap angle
Increases the belt tension without increasing power transmission
Outer diameter
Hole diameter
Thickness
Mean diameter
1 in 24 to 1 in 20
1 in 15 to 1 in 10
1 in 32 to 1 in 24
1 in 48 to 1 in 24
Axial load plus stress due to bending
Acceleration/retardation of masses plus stress due to bending
Axial load plus stress due to acceleration/retardation
Bending plus stress due to acceleration/retardation
Mild steel
Aluminium
Brass
Cast iron
Single
Double
Triple share
None of these
Tensile stress
Compressive stress
Direct shear stress
Torsional shear stress
Hot piercing
Extrusion
Cold peening
Cold heading
Combined effect of transverse shear stress and bending stress in the wire
Combined effect of bending stress and curvature of the wire
Combined effect of transverse shear stress and curvature of wire
Combined effect of torsional shear stress and transverse shear stress in the wire
Ductile materials
Brittle materials
Elastic materials
All of the above
One-fourth
One-third
One-half
Double
Tempering
Normalising
Annealing
Spheroidising
Transmission
Machine
Machine frame
None of these
Thread
Middle
Shank
Head
d
1.25 d
1.5 d
1.75 d
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
Similar to stud
1-3 m/s
3-15 m/s
15-30 m/s
30-50 m/s