1
1/π
π
π × number of teeth
C. π
Longitudinal stress
Hoop stress
Longitudinal and hoop stress
None of these
Longitudinal stress
Shear stress
Circumferential stress
None of these
Whose upper deviation is zero
Whose lower deviation is zero
Whose lower as well as upper deviations are zero
Does not exist
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
Thread
Middle
Shank
Head
Minor diameter
Major diameter
Pitch diameter
None of these
Reducing
Increasing
Both A and B
None of these
Porosity of the metal is largely eliminated
Grain structure of the metal is refined
Mechanical properties are improved due of refinement of grains
All of the above
Measure forces
Apply forces
Store energy
All of these
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
Is directly proportional to
Is inversely proportional to
Is equal to cos φ multiplied by
Does not depend upon
Increase shank diameter
Increase its length
Drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread
Tighten die bolt properly
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
Maximum principal stress theory
Maximum shear stress theory
Maximum strain energy theory
Maximum distortion energy theory
Remains constant at all speeds
Is minimum at zero speed and increases monotonically with increase in speed
Is maximum at zero speed and decreases monotonically with increase in speed
Becomes minimum at an optimum speed and then increases with further increase in speed
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
Nil or lightest
Maximum
Average
Any one of the above
Prevent the rotation of load being lifted
Enhance the load carrying capacity of the jack
Reduce the effort needed for lifting the working load
Reduce the value of frictional torque
Acme threads
Square threads
Buttress threads
Multiple threads
Half the angle between two inclined faces in axial plane
The angle between the tangent to the pitch helix and the plane of rotation
The angle between the tangent to the pitch helix and an element of the cylinder
None of the above
2μ sinθ/(θ + sinθ)
μ sinθ/(2θ + sin 2θ)
4μ sinθ/(θ + sinθ)
4μ sinθ/(2θ + sin 2θ)
Dependent on number of teeth of a gear
Dependent on system of teeth
Independent of size of teeth
All of these
8
4
2
6
Needle roller bearings
Tapered roller bearings
Spherical roller bearings
Cylindrical roller bearings
W/2
2W/3
W/9
8W/9
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
Directly as load
Inversely as square of load
Inversely as cube of load
Inversely as fourth power of load
T sec3φ
T sec²φ
T/sec3φ
T cosecφ
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