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Machine Design

Machine Design
A cotter joint is used to connect two __________ rods.

None of these
Parallel
Perpendicular
Co-axial

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Machine Design
For high speed engines, the cam follower should move with

Uniform velocity
Simple harmonic motion
Uniform acceleration and retardation
Cycloidal motion

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Machine Design
The load cup of a screw jack is made separate from the head of the spindle to

Enhance the load carrying capacity of the jack
Reduce the value of frictional torque
Reduce the effort needed for lifting the working load
Prevent the rotation of load being lifted

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Machine Design
Which of the following statement is correct for gears?

The pitch circle diameter is equal to the product of module and number of teeth
All of these
The pitch circle is always greater than the base circle
The addendum is less than dedendum

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Machine Design
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation

124 d
138 d
168 d
151 d

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Machine Design
Shaft coupling is used in machinery to

Reduce the transmission of shock loads
All of these
Introduce mechanical flexibility
Introduce protection against over loads

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