Direct tensile stress
Direct compressive stress
Direct bending stress
Direct shear stress
A. Direct tensile stress
Have contact at the bottom most of the bearing
Move towards right of the bearing making no metal to metal contact
Move towards right of the bearing making the metal to metal contact
Move towards left of the bearing making metal to metal contact
Ratio of coil diameter to wire diameter
Load required to produce unit deflection
Its capability of storing energy
Its ability to absorb shocks
Socket joint
Nipple joint
Union joint
Spigot and socket joint
Brittle
Ductile
Elastic
Plastic
Acme threads
Square threads
Buttress threads
Multiple threads
1/sinθ
1/cosθ
1/tanθ
sinθ cosθ
Needle roller bearings
Tapered roller bearings
Spherical roller bearings
Cylindrical roller bearings
Which are perfectly aligned
Which are not in exact alignment
Which have lateral misalignment
Whose axes intersect at a small angle
In a direction parallel to the cam axis
In a direction perpendicular to the cam axis
In any direction irrespective of cam axis
Along the cam axis
Muff coupling
Compression coupling
Flange coupling
All of these
Is just sufficient to hold parts together
Approaches yield point
Is 50% of yield point
Is about yield point divided by safety factor
0.20
0.35
0.50
0.65
40°
122°
136°
152°
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
d.t.τu
πd.t.τu
π/4 × d².τu
π/4 × d² × t.τu
2
4
8
16
50°C above upper critical temperature
50°C below upper critical temperature
50°C above lower critical temperature
50°C below lower critical temperature
Diameter of both the shafts is same
Angle of twist of both the shafts is same
Material of both the shafts is same
Twisting moment of both the shafts is same
Mild steel
Dead mild steel
Medium carbon steel
High carbon steel
Heavier
Lighter
Moderate
None of these
29°
55°
47.3°
60°
Single
Double
Triple share
None of these
Pressure angle
Pitch circle diameter
Circular pitch
Diametral pitch
In decreasing the slip of the belt
In increasing the slip of the belt
To keep the belt in centre on a pulley while it is in motion
To increase pulley life
Prevent the belt from running off the pulley
Increase the power transmission capacity
Increase the belt velocity
Prevent the belt joint from damaging the belt surface
Same
Coarser
Finer
Very fine
Ductile materials
Brittle materials
Elastic materials
All of the above
Length of arc of recess to the circular pitch
Length of path of contact to the circular pitch
Length of arc of contact to the circular pitch
Length of arc of approach to the circular pitch
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
Power transmitted increases
Power transmitted decreases
Power transmitted increases to a maximum value and then decreases
Power transmitted remains the same