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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

None of these
Half
Double
Same

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Machine Design
Which of the following statement is correct for gears?

The addendum is less than dedendum
The pitch circle diameter is equal to the product of module and number of teeth
All of these
The pitch circle is always greater than the base circle

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Machine Design
When a bolt and nut is made of mild steel, then the effective height of nut is made equal to (where d = Nominal diameter of bolt)

0.5 d
0.75 d
d
1.25 d

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

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

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Machine Design
An Involute pinion and gear are in mesh. If both have the same size of addendum, then there will be interference between the

Flanks of both gear and pinion
Tip of the gear and flank of pinion
Tip of both gear and pinion
Tip of the pinion and flank of gear

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Machine Design
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is

Equal
Larger/smaller depending on diameter of spring coil
Smaller
Larger

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