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Mechanical Engineering - Machine Design

Exercise : Machine Design - Section 8
21.
The fatigue stress concentration factor is defined as
the ratio of endurance limit with stress concentration to the endurance limit without stress concentration
the ratio of endurance limit without stress concentration to the endurance limit with stress concentration
the product of the endurance limits with and without stress concentration
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, The junction radius is 60 mm and the junction pressure is 1.1 N/mm2. The maximum hoop stress developed in the inner cylinder is
3.6 N/mm2 compression
3.6 N/mm2 tension
7.2 N/mm2 compression
7.2 N/mm2 tension
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
A connecting rod subjected to an axial load may buckle in the plane of motion of the connecting rod.
Correct
Incorrect
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have
right hand threads
left hand threads
multiple threads
pointed threads
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will
have contact at the bottom most of the bearing
move towards right of the bearing making metal to metal contact
move towards right of the bearing making no metal to metal contact
move towards left of the bearing making metal to metal contact
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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