The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

3/ (3 + v)

0.75/ (0.75 + √v)

4.5/ (4.5 + v)

6/ (6 + v)

3/ (3 + v)

0.75/ (0.75 + √v)

4.5/ (4.5 + v)

6/ (6 + v)

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Machine Design
When a metal or alloy is cold worked,

None of these

It is worked below recrystallization temperature

Its hardness and strength increases

Both (A) and (B)

None of these

It is worked below recrystallization temperature

Its hardness and strength increases

Both (A) and (B)

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Machine Design
Elastic nut is a locking device in which

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

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

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Machine Design
The ultimate strength of steel in tension in comparison to shear is in the ratio of

0.085416666666667

0.042361111111111

0.084027777777778

0.12638888888889

0.085416666666667

0.042361111111111

0.084027777777778

0.12638888888889

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Machine Design
In the levers of __________ type, the mechanical advantage is less than one.

First

Third

None of these

Second

First

Third

None of these

Second

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Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

None of these

Shaft A is better than shaft B

Both the shafts are equally good

Shaft B is better than shaft A

None of these

Shaft A is better than shaft B

Both the shafts are equally good

Shaft B is better than shaft A

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Machine Design

Machine Design The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

Machine Design When a metal or alloy is cold worked,

Machine Design Elastic nut is a locking device in which

Machine Design The ultimate strength of steel in tension in comparison to shear is in the ratio of

Machine Design In the levers of __________ type, the mechanical advantage is less than one.

Machine Design Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that

Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

Machine Design
When a metal or alloy is cold worked,

Machine Design
Elastic nut is a locking device in which

Machine Design
The ultimate strength of steel in tension in comparison to shear is in the ratio of

Machine Design
In the levers of __________ type, the mechanical advantage is less than one.

Machine Design
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that