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Mechanical Engineering - Machine Design

Exercise : Machine Design - Section 11
21.
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.
same
double
three times
four times
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zig-zag riveting is proposed. Which of the following statement is correct?
There are four rivets per pitch length, all in double shear
There are four rivets per pitch length, out of which two are in single shear and two are in double shear
There are five rivets per pitch length, all in double shear
There are five rivets per pitch length, out of which four are in double shear and one is in single shear
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
The form factor of a helical gear __________ with the increase in the helix angle.
increases
decreases
remains constant
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
The taper on a rectangular sunk key is
1 in 16
1 in 32
1 in 48
1 in 100
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
When carbon in the cast iron is in the form of cementite, the cast iron will be of white colour.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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