60°
55°
47°
29°
A. 60°
K
K/2
2K
K/4
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
Circular pitch
Diametral pitch
Module
None of these
A taper key which fits half in the key way of hub and half in the key way of shaft
A taper key which fits in a key way of the hub and is flat on the shaft
A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
Provided in pairs at right angles and each key is to withstand torsion in one direction only
To reduce friction
To facilitate slipping of balls
To prevent the lubricant from flowing out
To maintain the balls at a fixed distance apart
Thread
Middle
Shank
Head
Finishing and polishing
Shotpeening
De-carburisation
Electroplating
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
Low carbon steel
High carbon steel
Medium carbon steel
High speed steel
Lame's equation
Birnie's equation
Clavarinos' equation
All of these
45°
60°
75°
90°
Above
Below
At
None of these
Jam nut
Castle nut
Sawn nut
Ring nut
Varies linearly
Is uniform throughout
Varies exponentially, being more near the torque-input end
Varies exponentially, being less near the torque-input end
Which are not in exact alignment
Which are perfectly aligned
Whose axes intersect at a small angle
Have lateral misalignment
X-axis as neutral axis
Y-axis as neutral axis
X-axis or Y-axis as neutral axis
Z-axis
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
2.5
2.8
3.0
3.5
Tensile stress
Compressive stress
Shear stress
Bending stress
Reducing
Increasing
Both A and B
None of these
Material of belt and pulley
Slip of belt
Speed of belt
All of these
Eutectoid steel
Hypereutectoid steel
Hypo-eutectoid steel
None of these
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
Lighter and easier to handle
Greater shock absorption
Smoother inside walls
All of the above
3 mm
6 mm
8 mm
12 mm
Very fine threads
High efficiency
Low efficiency
Strong teeth
Addendum circle
Dedendum circle
Pitch circle
Clearance circle
Bottom side only
Top side only
On both sides
Any side
√(T/m)
√(T/2m)
√(T/3m)
None of these
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free