When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

Machine Design
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)

(4WD/ πd3) × K

(2WD/ πd3) × K

(WD/ πd3) × K

(8WD/ πd3) × K

(4WD/ πd3) × K

(2WD/ πd3) × K

(WD/ πd3) × K

(8WD/ πd3) × K

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Machine Design
The V-belts are particularly suitable for __________ drives.

Short

None of these

Both A and B

Long

Short

None of these

Both A and B

Long

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Machine Design
The form factor of a helical gear __________ with the increase in the helix angle.

Increases

Remains constant

None of these

Decreases

Increases

Remains constant

None of these

Decreases

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Machine Design
A sliding bearing which operates without any lubricant present, is called

Boundary lubricated bearing

Hydrostatic lubricated bearing

Hydrodynamic lubricated bearing

Zero film bearing

Boundary lubricated bearing

Hydrostatic lubricated bearing

Hydrodynamic lubricated bearing

Zero film bearing

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Machine Design
An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

Double

One-fourth

One-half

One-eighth

Double

One-fourth

One-half

One-eighth

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Machine Design
In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)

T₁/T₂ = (μθ)n

T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n

T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n

T₁/T₂ = μθ × n

T₁/T₂ = (μθ)n

T₁/T₂ = [(1 - μ tanθ)/ (1 + μ tanθ)]n

T₁/T₂ = [(1 + μ tanθ)/ (1 - μ tanθ)]n

T₁/T₂ = μθ × n

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Machine Design

Machine Design The V-belts are particularly suitable for __________ drives.

Machine Design The form factor of a helical gear __________ with the increase in the helix angle.

Machine Design A sliding bearing which operates without any lubricant present, is called

Machine Design An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

Machine Design In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)

Machine Design
The V-belts are particularly suitable for __________ drives.

Machine Design
The form factor of a helical gear __________ with the increase in the helix angle.

Machine Design
A sliding bearing which operates without any lubricant present, is called

Machine Design
An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.

Machine Design
In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)