A steel containing up to 0.15% carbon is known as

Machine Design
A steel containing up to 0.15% carbon is known as

High carbon steel

Medium carbon steel

Mild steel

Dead mild steel

High carbon steel

Medium carbon steel

Mild steel

Dead mild steel

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Machine Design
The included angle for the British standard whitworth thread is

29°

47.5°

60°

55°

29°

47.5°

60°

55°

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Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

1-3 m/s

30-50 m/s

15-30 m/s

3-15 m/s

1-3 m/s

30-50 m/s

15-30 m/s

3-15 m/s

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

12 kN/m

24 kN/m

6 kN/m

30 kN/m

12 kN/m

24 kN/m

6 kN/m

30 kN/m

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Machine Design
Elastic nut is a locking device in which

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

A slot is cut partly in middle of nut and then slot reduced by tightening a screw

Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip

One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

A slot is cut partly in middle of nut and then slot reduced by tightening a screw

Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip

One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

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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 = [(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

T₁/T₂ = (μθ)n

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Machine Design

Machine Design A steel containing up to 0.15% carbon is known as

Machine Design The included angle for the British standard whitworth thread is

Machine Design The gears are termed as medium velocity gears, if their peripheral velocity is

Machine Design A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

Machine Design Elastic nut is a locking device in which

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
A steel containing up to 0.15% carbon is known as

Machine Design
The included angle for the British standard whitworth thread is

Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

Machine Design
Elastic nut is a locking device in which

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)