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Machine Design

Machine Design
In a full journal bearing, the angle of contact of the bearing with the journal is

360°
120°
270°
180°

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Machine Design
A connecting rod should be

Strong in buckling about Y-axis
Any one of the above
Strong in buckling about X-axis
Equally strong in buckling about X-axis and Y-axis

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Machine Design
The expression 0.175 - 0.841/T is the Lewis form factor for

20° full depth involute system
20° stub system
14½° composite and full depth involute system
None of these

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Machine Design
For crank shaft bearings, the ratio of the length of the journal to its diameter is_________.

None of these
Greater than unity
Less than unity
Equal to 1

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Machine Design
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

Less
More
None of these
Same

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Machine Design
Which of the following screw thread is adopted for power transmission in either direction?

Multiple threads
Square threads
Acme threads
Buttress threads

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