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Machine Design

Machine Design
The included angle for the British Association thread is

29°
60°
55°
47.3°

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Machine Design
The cam follower extensively used in aircraft engines is

Flat faced follower
Roller follower
Knife edge follower
Spherical faced follower

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° stub system
20° full depth involute system
14½° composite and full depth involute system
None of these

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Machine Design
The dedendum circle diameter is equal to (where φ = Pressure angle)

Pitch circle diameter × cosφ
Pitch circle diameter × sinφ
Addendum circle diameter × cosφ
Clearance circle diameter × cosφ

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Machine Design
For low and moderate speed engines, the cam follower should move with

Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion
Uniform velocity

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Machine Design
When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as

Miter gears
Internal bevel gears
Crown bevel gears
Angular bevel gears

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