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Machine Design

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

15
10
20
25

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Machine Design
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

T₁ - T₂ + Tc
(T₁ + T₂ + Tc)/2
T₁ + T₂ + Tc
(T₁ - T₂ + Tc)/2

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Machine Design
For longitudinal joint in boilers, the type of joint used is

Lap joint with one ring overlapping the other
Butt joint with double cover plate
Any one of the above
Butt joint with single cover plate

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

4
10
6
8

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Machine Design
For hardening alloy steels and high speed steels, they are heated to

700 to 900°C
1300 to 1500°C
1100 to 1300°C
500 to 600°C

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Machine Design
A screw is said to be a self locking screw, if its efficiency is

None of these
Less than 50%
More than 50%
Equal to 50%

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