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Machine Design

Machine Design
For maximum power, the velocity of the belt will be

None of these
√(T/2m)
√(T/3m)
√(T/m)

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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

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

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Machine Design
Wire ropes as compared to cotton ropes

All of these
Can withstand shock loads
Are lighter in weight
Offer silent operation

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Machine Design
Oldham coupling is used to connect two shafts

Which are not in exact alignment
Which have lateral misalignment
Whose axes intersect at a small angle
Which are perfectly aligned

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Machine Design
The V-belts are particularly suitable for __________ drives.

None of these
Both A and B
Short
Long

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Machine Design
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to

W/9
8W/9
2W/3
W/2

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