When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

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Machine Design
A backing ring is used inside the pipe joint when making a

Socket weld

Butt weld

Sleeve weld

Fillet weld

Socket weld

Butt weld

Sleeve weld

Fillet weld

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Machine Design
When a metal or alloy is cold worked,

None of these

Both (A) and (B)

It is worked below recrystallization temperature

Its hardness and strength increases

None of these

Both (A) and (B)

It is worked below recrystallization temperature

Its hardness and strength increases

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Machine Design
The backlash for spur gears depends upon

Module

Both module and pitch line velocity

Pitch line velocity

Tooth profile

Module

Both module and pitch line velocity

Pitch line velocity

Tooth profile

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Machine Design
The creep in the belt is due to

Material of belt

Stresses beyond elastic limit of belt material

Unequal extensions in the belt due to tight and slack side tensions

Effect of temperature on belt

Material of belt

Stresses beyond elastic limit of belt material

Unequal extensions in the belt due to tight and slack side tensions

Effect of temperature on belt

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Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

30-50 m/s

1-3 m/s

3-15 m/s

15-30 m/s

30-50 m/s

1-3 m/s

3-15 m/s

15-30 m/s

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Machine Design

Machine Design A backing ring is used inside the pipe joint when making a

Machine Design When a metal or alloy is cold worked,

Machine Design The backlash for spur gears depends upon

Machine Design The creep in the belt is due to

Machine Design The gears are termed as medium velocity gears, if their peripheral velocity is

Machine Design
A backing ring is used inside the pipe joint when making a

Machine Design
When a metal or alloy is cold worked,

Machine Design
The backlash for spur gears depends upon

Machine Design
The creep in the belt is due to

Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is