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/2

8W/9

W/9

2W/3

W/2

8W/9

W/9

2W/3

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Machine Design
The ball bearings are provided with a cage

To facilitate slipping of balls

To prevent the lubricant from flowing out

To maintain the balls at a fixed distance apart

To reduce friction

To facilitate slipping of balls

To prevent the lubricant from flowing out

To maintain the balls at a fixed distance apart

To reduce friction

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Machine Design
A fast and loose pulley drive is used when

Shafts are arranged parallel and rotate in the same directions

Shafts are arranged at right angles and rotate in one definite direction

Shafts are arranged parallel and rotate in the opposite directions

Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

Shafts are arranged parallel and rotate in the same directions

Shafts are arranged at right angles and rotate in one definite direction

Shafts are arranged parallel and rotate in the opposite directions

Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft

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Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

160°

135°

180°

90°

160°

135°

180°

90°

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Machine Design
Which is correct statement? Stress concentration in cyclic loading is

Very serious in brittle materials and less serious in ductile materials

Seriousness would depend on other factors

Very serious in ductile materials and less serious in brittle materials

Equally serious in both types of materials

Very serious in brittle materials and less serious in ductile materials

Seriousness would depend on other factors

Very serious in ductile materials and less serious in brittle materials

Equally serious in both types of materials

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Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.6

0.25

0.5

0.2

0.6

0.25

0.5

0.2

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Machine Design

Machine Design The ball bearings are provided with a cage

Machine Design A fast and loose pulley drive is used when

Machine Design In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

Machine Design Which is correct statement? Stress concentration in cyclic loading is

Machine Design If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

Machine Design
The ball bearings are provided with a cage

Machine Design
A fast and loose pulley drive is used when

Machine Design
In a flange coupling, the keys are staggered at __________ along the circumference of the shafts in order to divide the weakening effect caused by key ways.

Machine Design
Which is correct statement? Stress concentration in cyclic loading is

Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to