Design Engineer Question:
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Two shafts A and B under pure torsion are of identical length and identical weight and are made of the same material. The shaft A is solid and the shaft B is hollow. We can say that

A. shaft B is better than shaft A
B. shaft A is better than shaft B
C. both the shafts are equally good

Answer:

Option A

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The bearings of heavy series have capacity __________ over the medium series.

A. 10 to 20%
B. 20 to 30%
C. 30 to 40%
D. 40 to 50%
Which of the following statement is correct for gears?

A. The addendum is less than dedendum
B. The pitch circle diameter is equal to the product of module and number of teeth
C. The pitch circle is always greater than the base circle
D. all of the above