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Machine Design

Machine Design
The steel pulleys are __________ in weight than cast iron pulleys of the same capacity.

Moderate
Heavier
Lighter
None of these

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Machine Design
The bending stress in a curved beam is

None of these
Maximum at the neutral axis
Zero at the point other than centroidal axis
Zero at the centroidal axis

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Machine Design
Rankine's theory is used for

Elastic materials
Ductile materials
Brittle materials
Plastic materials

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Machine Design
Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

8
2
16
4

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Machine Design
Taper usually provided on cotter is

1 in 5
1 in 24
1 in 10
1 in 40

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

6/ (6 + v)
4.5/ (4.5 + v)
3/ (3 + v)
0.75/ (0.75 + √v)

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