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

24 kN/m

6 kN/m

12 kN/m

30 kN/m

24 kN/m

6 kN/m

12 kN/m

30 kN/m

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Any one of the above

Butt joint with single cover plate

Lap joint with one ring overlapping the other

Butt joint with double cover plate

Any one of the above

Butt joint with single cover plate

Lap joint with one ring overlapping the other

Butt joint with double cover plate

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Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Compressive stress

Shear stress

Tensile stress

Bending stress

Compressive stress

Shear stress

Tensile stress

Bending stress

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Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Increase the key length

Increase the key depth

Decrease the key length

Increase the key width

Increase the key length

Increase the key depth

Decrease the key length

Increase the key width

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Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to(Where, Pc = tension in belt due to centrifugal force)

2 Pc

Pc/3

1 Pc

3 Pc

2 Pc

Pc/3

1 Pc

3 Pc

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Machine Design
The fatigue life of a part can be improved by

Electroplating

Polishing

Coating

Shot peening

Electroplating

Polishing

Coating

Shot peening

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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 For longitudinal joint in boilers, the type of joint used is

Machine Design When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Machine Design In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Machine Design The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to(Where, Pc = tension in belt due to centrifugal force)

Machine Design The fatigue life of a part can be improved by

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
For longitudinal joint in boilers, the type of joint used is

Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the stress induced in the wire is

Machine Design
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

Machine Design
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to(Where, Pc = tension in belt due to centrifugal force)

Machine Design
The fatigue life of a part can be improved by