Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

Machine Design
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

W/9

8W/9

W/2

2W/3

W/9

8W/9

W/2

2W/3

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

3/ (3 + v)

4.5/ (4.5 + v)

0.75/ (0.75 + √v)

6/ (6 + v)

3/ (3 + v)

4.5/ (4.5 + v)

0.75/ (0.75 + √v)

6/ (6 + v)

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Machine Design
Stress concentration in cyclic loading is more serious in

Brittle materials

Depends on other factors

Equally serious in both cases

Ductile materials

Brittle materials

Depends on other factors

Equally serious in both cases

Ductile materials

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Machine Design
The elasticity is the property of a material which enables it to

Draw into wires by the application of a tensile force

Retain deformation produced under load permanently

Regains its original shape after deformation when the external forces are removed

Resists fracture due to high impact loads

Draw into wires by the application of a tensile force

Retain deformation produced under load permanently

Regains its original shape after deformation when the external forces are removed

Resists fracture due to high impact loads

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Machine Design
In radial cams, the follower moves

In a direction parallel to the cam axis

In a direction perpendicular to the cam axis

In any direction irrespective of cam axis

Along the cam axis

In a direction parallel to the cam axis

In a direction perpendicular to the cam axis

In any direction irrespective of cam axis

Along the cam axis

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Machine Design
Which of the following statement is wrong for a connecting rod?

If Ixx < 4 Iyy, the buckling will occur about X-axis

If Ixx > 4 Iyy, the buckling will occur about Y-axis

The most suitable section for the connecting rod is T-section

The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy

If Ixx < 4 Iyy, the buckling will occur about X-axis

If Ixx > 4 Iyy, the buckling will occur about Y-axis

The most suitable section for the connecting rod is T-section

The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy

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Machine Design

Machine Design The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

Machine Design Stress concentration in cyclic loading is more serious in

Machine Design The elasticity is the property of a material which enables it to

Machine Design In radial cams, the follower moves

Machine Design Which of the following statement is wrong for a connecting rod?

Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

Machine Design
Stress concentration in cyclic loading is more serious in

Machine Design
The elasticity is the property of a material which enables it to

Machine Design
In radial cams, the follower moves

Machine Design
Which of the following statement is wrong for a connecting rod?