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

(8WD/ πd3) × K

(WD/ πd3) × K

(2WD/ πd3) × K

(4WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(2WD/ πd3) × K

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Machine Design
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

1/tanθ

1/sinθ

1/cosθ

sinθ cosθ

1/tanθ

1/sinθ

1/cosθ

sinθ cosθ

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Machine Design
The creep in the belt is due to

Material of belt

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

Effect of temperature on belt

Stresses beyond elastic limit of belt material

Material of belt

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

Effect of temperature on belt

Stresses beyond elastic limit of belt material

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Machine Design
The edges of a boiler plate are bevelled to an angle of

30°

45°

60°

80°

30°

45°

60°

80°

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Machine Design
When the speed of belt increases,

The power transmitted will decrease

The coefficient of friction between the belt and pulley increases

The power transmitted will increase

The coefficient of friction between the belt and pulley decreases

The power transmitted will decrease

The coefficient of friction between the belt and pulley increases

The power transmitted will increase

The coefficient of friction between the belt and pulley decreases

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Machine Design
The bearings of heavy series have capacity __________ over the medium series.

20 to 30%

30 to 40%

10 to 20%

40 to 50%

20 to 30%

30 to 40%

10 to 20%

40 to 50%

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Machine Design

Machine Design For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

Machine Design The creep in the belt is due to

Machine Design The edges of a boiler plate are bevelled to an angle of

Machine Design When the speed of belt increases,

Machine Design The bearings of heavy series have capacity __________ over the medium series.

Machine Design
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

Machine Design
The creep in the belt is due to

Machine Design
The edges of a boiler plate are bevelled to an angle of

Machine Design
When the speed of belt increases,

Machine Design
The bearings of heavy series have capacity __________ over the medium series.