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Machine Design

Machine Design
If two springs are in parallel then their overall stiffness will be

Double
Half
None of these
Same

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Machine Design
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is

2050 N-m
2100 N-m
2136 N-m
2000 N-m

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Machine Design
In a journal bearing, the load on the bearing is __________ to the axis of the journal.

None of these
Both A and B
Parallel
Perpendicular

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Machine Design
A steel containing _________ 0.8% carbon is known as hypo-eutectoid steel.

Less than
Greater than
None of these
Equal to

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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

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

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Machine Design
The maximum bending stress in a curved beam having symmetrical section always occur at the

Inside fiber
Outside fiber
Neutral axis
Centroidal axis

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