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

8W/9

W/2

2W/3

W/9

8W/9

W/2

2W/3

W/9

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Machine Design
The modulus of elasticity for mild steel is approximately equal to

100 kN/mm²

80 kN/mm²

210 kN/mm²

110 kN/mm²

100 kN/mm²

80 kN/mm²

210 kN/mm²

110 kN/mm²

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Machine Design
Stress concentration factor is defined as the ratio of

Maximum stress to the nominal stress

Nominal stress to the maximum stress

Maximum stress to the endurance limit

Nominal stress to the endurance limit

Maximum stress to the nominal stress

Nominal stress to the maximum stress

Maximum stress to the endurance limit

Nominal stress to the endurance limit

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Machine Design
The lower deviation is the algebraic difference between the

Maximum limit and the basic size

Minimum limit and the basic size

None of these

Actual size and the corresponding basic size

Maximum limit and the basic size

Minimum limit and the basic size

None of these

Actual size and the corresponding basic size

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Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Elasticity

Strength

Endurance

Toughness

Elasticity

Strength

Endurance

Toughness

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Machine Design
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

Becomes minimum at an optimum speed and then increases with further increase in speed

Is maximum at zero speed and decreases monotonically with increase in speed

Remains constant at all speeds

Is minimum at zero speed and increases monotonically with increase in speed

Becomes minimum at an optimum speed and then increases with further increase in speed

Is maximum at zero speed and decreases monotonically with increase in speed

Remains constant at all speeds

Is minimum at zero speed and increases monotonically with increase in speed

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Machine Design

Machine Design The modulus of elasticity for mild steel is approximately equal to

Machine Design Stress concentration factor is defined as the ratio of

Machine Design The lower deviation is the algebraic difference between the

Machine Design The property of a material which enables it to resist fracture due to high impact loads is known as

Machine Design In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing

Machine Design
The modulus of elasticity for mild steel is approximately equal to

Machine Design
Stress concentration factor is defined as the ratio of

Machine Design
The lower deviation is the algebraic difference between the

Machine Design
The property of a material which enables it to resist fracture due to high impact loads is known as

Machine Design
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing