When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(8WD/ πd3) × K

(WD/ πd3) × K

(4WD/ πd3) × K

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Machine Design
In the levers of first type, the mechanical advantage is ________ one.

None of these

Less than

Equal to

More than

None of these

Less than

Equal to

More than

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

None of these

Double

Same

Half

None of these

Double

Same

Half

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Machine Design
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Tangent key

Gib-head key

Feather key

Woodruff key

Tangent key

Gib-head key

Feather key

Woodruff key

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Machine Design
The connecting rod bolts are tightened up so that tightening stress

Is 50% of yield point

Is just sufficient to hold parts together

Is about yield point divided by safety factor

Approaches yield point

Is 50% of yield point

Is just sufficient to hold parts together

Is about yield point divided by safety factor

Approaches yield point

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Machine Design
A leaf spring in automobiles is used

To apply forces

To measure forces

To absorb shocks

To store strain energy

To apply forces

To measure forces

To absorb shocks

To store strain energy

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Machine Design

Machine Design In the levers of first type, the mechanical advantage is ________ one.

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

Machine Design Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Machine Design The connecting rod bolts are tightened up so that tightening stress

Machine Design A leaf spring in automobiles is used

Machine Design
In the levers of first type, the mechanical advantage is ________ one.

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

Machine Design
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Machine Design
The connecting rod bolts are tightened up so that tightening stress

Machine Design
A leaf spring in automobiles is used