In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Pitch lead angle

None of these

Pressure angle

Helix angle

Pitch lead angle

None of these

Pressure angle

Helix angle

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Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

0.75 d

0.5 d

1.25 d

d

0.75 d

0.5 d

1.25 d

d

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Machine Design
A sliding bearing which operates without any lubricant present, is called

Hydrostatic lubricated bearing

Boundary lubricated bearing

Zero film bearing

Hydrodynamic lubricated bearing

Hydrostatic lubricated bearing

Boundary lubricated bearing

Zero film bearing

Hydrodynamic lubricated bearing

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Machine Design
According to maximum normal stress theory, the maximum normal stress in the shaft is

σ + √(σ² × 4τ²)

(1/2) × [σ + √(σ² × 4τ²)]

√(σ² × 4τ²)

(1/2) × √(σ² × 4τ²)

σ + √(σ² × 4τ²)

(1/2) × [σ + √(σ² × 4τ²)]

√(σ² × 4τ²)

(1/2) × √(σ² × 4τ²)

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Machine Design
Jam nut is a locking device in which

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

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 in middle of nut and then slot reduced by tightening a screw

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

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

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 in middle of nut and then slot reduced by tightening a screw

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

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Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Reducing stress concentration

Ease of manufacture

Fullering and caulking

Safety

Reducing stress concentration

Ease of manufacture

Fullering and caulking

Safety

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Machine Design

Machine Design In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Machine Design When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

Machine Design A sliding bearing which operates without any lubricant present, is called

Machine Design According to maximum normal stress theory, the maximum normal stress in the shaft is

Machine Design Jam nut is a locking device in which

Machine Design The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Machine Design
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

Machine Design
A sliding bearing which operates without any lubricant present, is called

Machine Design
According to maximum normal stress theory, the maximum normal stress in the shaft is

Machine Design
Jam nut is a locking device in which

Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for