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Machine Design

Machine Design
The wear load should be __________ the dynamic load.

Greater than
Equal to
Less than
None of these

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Machine Design
The function of cutting oil when threading a pipe is to

Help removes chips
All of these
Lubricate the dies
Provide cooling action

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

8
10
4
6

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Machine Design
When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(Pmax / 2m)
√(Pmax / 3m)
√(3m /Pmax)
√(Pmax / m)

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Machine Design
A connecting rod subjected to an axial load may buckle with

X-axis or Y-axis as neutral axis
Z-axis
X-axis as neutral axis
Y-axis as neutral axis

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Machine Design
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is

7.2 N/mm² tension
3.6 N/mm² compression
3.6 N/mm² tension
7.2 N/mm² compression

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