Low carbon steel
High carbon steel
Medium carbon steel
High speed steel
C. Medium carbon steel
Bolt
Tap bolt
Stud
None of these
Less than
Equal to
More than
None of these
Over head shaft
Counter shaft
Line shaft
All of these
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
Keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
Keeping the core diameter smaller than the diameter of the unthreaded portion
Keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
None of the above
120°
180°
270°
360°
Strong in buckling about X-axis
Strong in buckling about Y-axis
Equally strong in buckling about X-axis and Y-axis
Any one 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
To apply forces
To measure forces
To absorb shocks
To store strain energy
Is just sufficient to hold parts together
Approaches yield point
Is 50% of yield point
Is about yield point divided by safety factor
p.d.σc
p.t.σc
n.d.t.σc
(p - d) t.σc
Spur gearing
Helical gearing
Bevel gearing
Spiral gearing
Pitch circle to the top of a tooth
Pitch circle to the bottom of a tooth
Top of a tooth to the bottom of a tooth
Addendum circle to the clearance circle
0.20
0.35
0.50
0.65
Helix angle
Pressure angle
Pitch lead angle
None of these
0.45
0.55
0.65
0.75
Direct tensile stress
Direct compressive stress
Direct bending stress
Direct shear stress
Flanged
Threaded
Bell and spigot
Expansion
d/2
d/3
3d/4
d/4
Varies linearly
Is uniform throughout
Varies exponentially, being more at the torque-input end
Varies exponentially, being less at the torque-input end
Base circle
Pitch circle
Addendum circle
Dedendum circle
Muff coupling
Compression coupling
Flange coupling
All of these
Ductile materials
Brittle materials
Equally serious in both cases
Depends on other factors
30°
45°
60°
80°
Equal to
Less than
Greater than
None of these
Surface of the top of the tooth
Surface of the tooth above the pitch surface
Surface of the tooth below the pitch surface
Width of the tooth measured along the pitch circle
Ductile material
Brittle material
Elastic material
Hard material
Larger than
Smaller than
Equal to
None of these
Transmission
Machine
Machine frame
None of these
Elastic limit to the working stress
Elastic limit to the yield point
Endurance limit to the working stress
Young's modulus to the ultimate tensile strength