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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
For hardening alloy steels and high speed steels, they are heated to

1100 to 1300°C
500 to 600°C
1300 to 1500°C
700 to 900°C

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Machine Design
The rivet head used for boiler plate riveting is usually

Counter sunk head
Snap head
Pan Head
Conical head

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Machine Design
The bearing characteristic number in a hydrodynamic bearing depends upon

Length, width and load
Viscosity, speed and bearing pressure
Viscosity, speed and load
Length, width and speed

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Machine Design
Shaft coupling is used in machinery to

All of these
Introduce mechanical flexibility
Introduce protection against over loads
Reduce the transmission of shock loads

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Machine Design
Aircraft body is usually fabricated by

Pre-casting
Welding
Casting
Riveting

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