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Machine Design

Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

1.6 d
2 d
1.2 d
2.5 d

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Machine Design
Cast iron pipes are mainly used

In pressure lubrication systems on prime movers
For conveying steam
In water and sewage systems
All of these

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

15-30 m/s
3-15 m/s
1-3 m/s
30-50 m/s

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Machine Design
The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________ are equal to 6/(6 + v).

10 m/s
12.5 m/s
15 m/s
20 m/s

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Machine Design
Multiple threads are used to secure

Low efficiency
High efficiency
High load lifting capacity
High mechanical advantage

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Machine Design
The deflection of a cantilever beam under load W is 8. If its width is halved, then the deflection under load W will be

44045
43929
44047
43869

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