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

12 kN/m

30 kN/m

24 kN/m

6 kN/m

12 kN/m

30 kN/m

24 kN/m

6 kN/m

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Machine Design
Spring index is

Indication of quality of spring

Ratio of coil diameter to wire diameter

Load required to produce unit deflection

Its capability of storing energy

Indication of quality of spring

Ratio of coil diameter to wire diameter

Load required to produce unit deflection

Its capability of storing energy

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Machine Design
The arms of the pulleys for flat belt drive have

All the three characteristics

Elliptical cross-section

Major axis twice the minor axis

Major axis in plane of rotation

All the three characteristics

Elliptical cross-section

Major axis twice the minor axis

Major axis in plane of rotation

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Machine Design
When a metal or alloy is cold worked,

None of these

Both (A) and (B)

It is worked below recrystallization temperature

Its hardness and strength increases

None of these

Both (A) and (B)

It is worked below recrystallization temperature

Its hardness and strength increases

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Machine Design
The maximum efficiency of a square threaded screw is

(1 + sinφ)/ (1 - sinφ)

(1 - sinφ)/ (1 + cosφ)

(1 - sinφ)/ (1 + sinφ)

(1 + cosφ)/ (1 - sinφ)

(1 + sinφ)/ (1 - sinφ)

(1 - sinφ)/ (1 + cosφ)

(1 - sinφ)/ (1 + sinφ)

(1 + cosφ)/ (1 - sinφ)

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Machine Design
In a journal bearing, the load on the bearing is __________ to the axis of the journal.

Perpendicular

Parallel

Both A and B

None of these

Perpendicular

Parallel

Both A and B

None of these

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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 Spring index is

Machine Design The arms of the pulleys for flat belt drive have

Machine Design When a metal or alloy is cold worked,

Machine Design The maximum efficiency of a square threaded screw is

Machine Design In a journal bearing, the load on the bearing is __________ to the axis of the journal.

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
Spring index is

Machine Design
The arms of the pulleys for flat belt drive have

Machine Design
When a metal or alloy is cold worked,

Machine Design
The maximum efficiency of a square threaded screw is

Machine Design
In a journal bearing, the load on the bearing is __________ to the axis of the journal.