A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

6 kN/m

12 kN/m

24 kN/m

30 kN/m

6 kN/m

12 kN/m

24 kN/m

30 kN/m

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Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Acme

Buttress

Metric

Square

Acme

Buttress

Metric

Square

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Machine Design
The wear load should be __________ the dynamic load.

Less than

None of these

Greater than

Equal to

Less than

None of these

Greater than

Equal to

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Machine Design
The included angle in unified of American National threads is

60°

55°

47°

29°

60°

55°

47°

29°

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Machine Design
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

6/(6 + v)

0.75/(0.75 + √v)

3/(3 + v)

4.5/(4.5 + v)

6/(6 + v)

0.75/(0.75 + √v)

3/(3 + v)

4.5/(4.5 + v)

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Machine Design
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves

None of these

Axially downwards

Axially upwards or downwards

Axially upwards

None of these

Axially downwards

Axially upwards or downwards

Axially upwards

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Machine Design

Machine Design A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

Machine Design Applications in which stresses are encountered in one direction only uses following type of threads

Machine Design The wear load should be __________ the dynamic load.

Machine Design The included angle in unified of American National threads is

Machine Design The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

Machine Design When the screw in a mechanical screw jack rotates, the load kept on the top of it moves

Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

Machine Design
Applications in which stresses are encountered in one direction only uses following type of threads

Machine Design
The wear load should be __________ the dynamic load.

Machine Design
The included angle in unified of American National threads is

Machine Design
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

Machine Design
When the screw in a mechanical screw jack rotates, the load kept on the top of it moves