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Mechanical Engineering
‣
Strength of Materials
Comments
Question
The stiffness of a closely-coiled helical spring is __________ proportional to number of turns.
Options
A. directly
B. inversely
Correct Answer
inversely
Strength of Materials problems
Search Results
1. In the below figure, the plastic range occurs
Options
A. before point
A
B. beyond point
A
C. between points
A
and
D
D. between points
D
and
E
Show Answer
Scratch Pad
Discuss
Correct Answer: beyond point
A
2. The planes, which carry no shear stress, are known as principal planes.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
3. Within elastic limit, shear stress is __________ shear strain.
Options
A. equal to
B. less than
C. directly proportional to
D. inversely proportional to
Show Answer
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Correct Answer: directly proportional to
4. The maximum bending moment of a simply supported beam of span
l
and carrying a point load
W
at the centre of beam, is
Options
A.
Wl
/4
B.
Wl
/2
C.
Wl
D.
Wl
2
/4
Show Answer
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Discuss
Correct Answer:
Wl
/4
5. A pressure vessel is said to be a thick shell, when
Options
A. it is made of thick sheets
B. the internal pressure is very high
C. the ratio of wall thickness of the vessel to its diameter is less than 1/10.
D. the ratio of wall thickness of the vessel to its diameter is greater than 1/10.
Show Answer
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Correct Answer: the ratio of wall thickness of the vessel to its diameter is greater than 1/10.
6. The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is
Options
A. 2/3
B. 3/4
C. 1
D. 9/8
Show Answer
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Correct Answer: 9/8
7. A beam of triangular section is placed with its base horizontal. The maximum shear stress occurs at
Options
A. apex of the triangle
B. mid of the height
C. centre of gravity of the triangle
D. base of the triangle
Show Answer
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Correct Answer: mid of the height
8. The shear stress at the centre of a circular shaft under torsion is
Options
A. zero
B. minimum
C. maximum
D. infinity
Show Answer
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Discuss
Correct Answer: zero
9. At the neutral axis of a beam, the shear stress is
Options
A. zero
B. minimum
C. maximum
D. infinity
Show Answer
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Discuss
Correct Answer: maximum
10. The product of Young's modulus (
E
) and moment of inertia (
I
) is known as
Options
A. modulus of rigidity
B. bulk modulus
C. flexural rigidity
D. torsional rigidity
Show Answer
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Discuss
Correct Answer: flexural rigidity
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