MACHINE DESIGN QUIZ

When a bolt is subjected to an external load, the stress induced in the bolt will be

Tensile stress

Combined tensile and shear stress

Any one of these

Shear stress

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YOUR ANSWER : ?

Gear box is used

To obtain variable speeds

To produce torque

To increase efficiency of system

For speed reduction

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YOUR ANSWER : ?

A bolt is designed on the basis of __________ with a large factor of safety.

Direct shear stress

Direct bending stress

Direct tensile stress

Direct compressive stress

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YOUR ANSWER : ?

Which of the following statement is correct for gears?

The pitch circle diameter is equal to the product of module and number of teeth

The pitch circle is always greater than the base circle

All of these

The addendum is less than dedendum

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YOUR ANSWER : ?

Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

Elastic strength

None of these

Yield strength

Shear strength

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If two springs are in parallel then their overall stiffness will be

Same

Half

None of these

Double

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YOUR ANSWER : ?

A localized compressive stress at the area of contact between two members is known as

Tensile stress

Bearing stress

Bending stress

Shear stress

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A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to

pd/2σt

pd/4σt

pd/3σt

pd/σt

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YOUR ANSWER : ?

The difference between the upper limit and lower limit of a dimension is called

Tolerance

Actual size

Basic size

Nominal size

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A steel containing _________ 0.8% carbon is known as hypo-eutectoid steel.

Less than

Greater than

Equal to

None of these

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YOUR ANSWER : ?

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