Ductile materials
Brittle materials
Elastic materials
All of the above
A. Ductile materials
Helical spring
Conical spring
Flat spiral spring
Volute spring
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
Larger than
Smaller than
Equal to
None of these
Be independent of ratio of mass of load W to mass of bar (y)
Increase with increase in y
Decrease with decrease in y
Depend on other considerations
Thick lubricated bearings
Plastic bearings
Antifriction bearings
Thin lubricated bearings
Woodruff key
Feather key
Flat saddle key
Gib head key
Ratio of coil diameter to wire diameter
Load required to produce unit deflection
Its capability of storing energy
Its ability to absorb shocks
3 Pc
Pc
Pc/3
2 Pc Where, Pc = tension in belt due to centrifugal force
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
Equal to
Less than
Greater than
None of these
Equal to
Twice
Three times
Four times
At bottom
At sides only
Both at bottom and sides
Could touch anywhere
K
K/2
2K
K/4
Minor diameter
Major diameter
Pitch diameter
None of these
Knuckle threads
Square threads
Acme threads
Buttress threads
Dun cylinder
Hollow shaft
Solid shaft
Thick cylinder
The belt should touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley
The belt should not touch the sides of groove in the pulley
None of the above
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
Constant period
Fixed period
Dwell period
Idle period
Partially
Fully
Either A or B
None of these
Pitch circle diameter × cosφ
Addendum circle diameter × cosφ
Clearance circle diameter × cosφ
Pitch circle diameter × sinφ
Tensile stress
Compressive stress
Shear stress
None of these
d.t.τu
πd.t.τu
π/4 × d².τu
π/4 × d² × t.τu
40
50
70
100
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
Neutral surface
Upper surface
Lower surface
None of these
P1 - P2
P1 + P2
2 × (P1 + P2)
[2 × (P1 + P2)] + Pc Where Pc is centrifugal tension
Short bearing
Long bearing
Medium bearing
Square bearing
14 ½° composite and full depth involute system
20° full depth involute system
20° stub system
None of the above
Best method
Extremely hazardous
Has no effect as regards fatigue strength
Cheapest method