A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)

Machine Design
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)

σ [1 + (3a/b)]

σ [1 + (b/2a)]

σ [1 + (2a/b)]

σ [1 + (b/3a)]

σ [1 + (3a/b)]

σ [1 + (b/2a)]

σ [1 + (2a/b)]

σ [1 + (b/3a)]

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Machine Design
The centrifugal tension in belts

Decreases the power transmitted

Increases the power transmitted

Increase the wrap angle

Increases the belt tension without increasing power transmission

Decreases the power transmitted

Increases the power transmitted

Increase the wrap angle

Increases the belt tension without increasing power transmission

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Machine Design
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)

Gd⁴/ 8D²n

Gd⁴/ 8D3n

Gd3/ 8D3n

Gd⁴/ 4D3n

Gd⁴/ 8D²n

Gd⁴/ 8D3n

Gd3/ 8D3n

Gd⁴/ 4D3n

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Machine Design
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

P/√2.s.l

2P/s.l

√2P/s.l

P/2.s.l

P/√2.s.l

2P/s.l

√2P/s.l

P/2.s.l

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Machine Design
The draw of cotter should not be more than

6 mm

8 mm

12 mm

3 mm

6 mm

8 mm

12 mm

3 mm

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Machine Design
The bending stress in a curved beam is

None of these

Maximum at the neutral axis

Zero at the point other than centroidal axis

Zero at the centroidal axis

None of these

Maximum at the neutral axis

Zero at the point other than centroidal axis

Zero at the centroidal axis

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Machine Design

Machine Design The centrifugal tension in belts

Machine Design The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)

Machine Design A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

Machine Design The draw of cotter should not be more than

Machine Design The bending stress in a curved beam is

Machine Design
The centrifugal tension in belts

Machine Design
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)

Machine Design
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by

Machine Design
The draw of cotter should not be more than

Machine Design
The bending stress in a curved beam is