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Machine Design

Machine Design
The gears are termed as medium velocity gears, if their peripheral velocity is

1-3 m/s
30-50 m/s
3-15 m/s
15-30 m/s

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Machine Design
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be

70 to 83%
45 to 60%
80 to 90%
63 to 70%

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Machine Design
According to Indian standards, total numbers of fundamental deviations are

20
15
25
10

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Machine Design
When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(Pmax / m)
√(Pmax / 3m)
√(3m /Pmax)
√(Pmax / 2m)

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Machine Design
When a close coiled helical spring is compressed, its wire is subjected to

Shear
Tension
All of these
Compression

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Machine Design
Transverse fillet welded joints are designed for

Tensile strength
Shear strength
Compressive strength
Bending strength

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