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Machine Design

Machine Design
The included angle for the British Association thread is

29°
47.3°
55°
60°

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Machine Design
The draw of cotter need not exceed

20 mm
10 mm
3 mm
5 mm

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Machine Design
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.97
0.96
0.99
0.98

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Machine Design
In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)

3.5 d
2d + 13 mm
2d + 20 mm
d + 17 mm

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Machine Design
The washer is generally specified by its

Mean diameter
Thickness
Hole diameter
Outer diameter

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Machine Design
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)

d = 2√t
d = 1.6√t
d = √t
d = 6√t

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