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Machine Design

Machine Design
The helix angle for double helical gears may be made up to

90°
45°
60°
75°

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Machine Design
The rivet head used for boiler plate riveting is usually

Counter sunk head
Conical head
Snap head
Pan Head

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Machine Design
Taper on the cotter and slot is provided

On one side only
On none of the sides
On both the sides
May be provided anywhere

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Machine Design
When two helical springs of equal lengths are arranged to form a cluster spring, then

Only A is correct
Load taken by each spring will be half the total load
Both A and B is correct
Shear stress in each spring will be equal

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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

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

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Machine Design
Two shafts will have equal strength, if

Twisting moment of both the shafts is same
Angle of twist of both the shafts is same
Diameter of both the shafts is same
Material of both the shafts is same

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