Exercise: Machine Design

Questions for: Machine Design

The bearing characteristic number in a hydrodynamic bearing depends upon
A:
length, width and load
B:
length, width and speed
C:
viscosity, speed and load
D:
viscosity, speed and bearing pressure
Answer: D
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In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.
A:
equal to
B:
twice
C:
three times
D:
four times
Answer: D
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In a belt drive, the velocity ratio is the inverse ratio of the diameters of driving and driven pulleys.
A:
True
B:
False
C:
D:
Answer: A
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In designing a key, it is assumed that the distribution of forces along the length of key
A:
varies linearly
B:
is uniform throughout
C:
varies exponentially, being more at the torque-input end
D:
varies exponentially, being less at the torque-input end
Answer: B
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A parallel sunk key, made of steel, is equally strong in shearing and crushing.
A:
Yes
B:
No
C:
D:
Answer: B
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