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

sinθ cosθ

1/sinθ

1/tanθ

1/cosθ

sinθ cosθ

1/sinθ

1/tanθ

1/cosθ

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Machine Design
The shear stress at a point in a shaft subjected to a torque is

Directly proportional to the applied torque and the polar moment of inertia

Directly proportional to the polar moment of inertia and to the distance of the point from the axis

Inversely proportional to the applied torque and the polar moment of inertia

Directly proportional to the applied torque and inversely proportional to the polar moment of inertia

Directly proportional to the applied torque and the polar moment of inertia

Directly proportional to the polar moment of inertia and to the distance of the point from the axis

Inversely proportional to the applied torque and the polar moment of inertia

Directly proportional to the applied torque and inversely proportional to the polar moment of inertia

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

2.8

3.5

2.5

3.0

2.8

3.5

2.5

3.0

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Machine Design
An alien bolt is

Provided with hexagonal depression in head

Used in high speed components

Same as stud

Self locking bolt

Provided with hexagonal depression in head

Used in high speed components

Same as stud

Self locking bolt

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Machine Design
Castle nut is a locking device in which

A slot is cut partly is middle of nut and then slot reduced by tightening a screw

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

A slot is cut partly is middle of nut and then slot reduced by tightening a screw

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin spitted and bent in reverse direction at other end

A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

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Machine Design
Cast iron pipes are mainly used

In pressure lubrication systems on prime movers

For conveying steam

In water and sewage systems

All of these

In pressure lubrication systems on prime movers

For conveying steam

In water and sewage systems

All of these

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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 shear stress at a point in a shaft subjected to a torque is

Machine Design An alien bolt is

Machine Design Castle nut is a locking device in which

Machine Design Cast iron pipes are mainly used

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 shear stress at a point in a shaft subjected to a torque is

Machine Design
An alien bolt is

Machine Design
Castle nut is a locking device in which

Machine Design
Cast iron pipes are mainly used