A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

3.5

2.5

3

2.8

3.5

2.5

3

2.8

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Machine Design
Lewis equation in gears is used to find the

Tensile stress in bending

Compressive stress in bending

Shear stress

Fatigue stress

Tensile stress in bending

Compressive stress in bending

Shear stress

Fatigue stress

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Machine Design
The groove angle of pulleys for V-belt is

420 to 450

300 to 320

340 to 360

More than 400

420 to 450

300 to 320

340 to 360

More than 400

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Machine Design
Taper on the cotter and slot is provided

On both the sides

May be provided anywhere

On none of the sides

On one side only

On both the sides

May be provided anywhere

On none of the sides

On one side only

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Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

(Kf + 1)/ (Kt + 1)

(Kt - 1)/ (Kf - 1)

(Kt + 1)/ (Kf + 1)

(Kf - 1)/ (Kt - 1)

(Kf + 1)/ (Kt + 1)

(Kt - 1)/ (Kf - 1)

(Kt + 1)/ (Kf + 1)

(Kf - 1)/ (Kt - 1)

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Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2100 N-m

2050 N-m

2000 N-m

2136 N-m

2100 N-m

2050 N-m

2000 N-m

2136 N-m

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Machine Design

Machine Design Lewis equation in gears is used to find the

Machine Design The groove angle of pulleys for V-belt is

Machine Design Taper on the cotter and slot is provided

Machine Design The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as

Machine Design
Lewis equation in gears is used to find the

Machine Design
The groove angle of pulleys for V-belt is

Machine Design
Taper on the cotter and slot is provided

Machine Design
The notch sensitivity q is expressed in terms of fatigue stress concentration factor Kf and theoretical stress concentration factor Kt as