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Mechanical Engineering
‣
Strength of Materials
Comments
Question
Principle plane is a plane on which the shear stress is
Options
A. zero
B. minimum
C. maximum
Correct Answer
zero
Strength of Materials problems
Search Results
1. The ductility of a material __________ with the increase in percentage reduction in area of a specimen under tensile test.
Options
A. increases
B. decreases
C. remains same
Show Answer
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Discuss
Correct Answer: increases
2. The extremeties of any diameter on Mohr's circle represent
Options
A. principal stresses
B. normal stresses on planes at 45°
C. shear stresses on planes at 45°
D. normal and shear stresses on a plane
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Correct Answer: normal stresses on planes at 45°
3. Two shafts '
A
' and '
B
' are made of same material. The shaft '
A
' is solid and has diameter
D
. The shaft '
B
' is hollow with outer diameter
D
and inner diameter
D
/2. The strength of hollow shaft in torsion is __________ as that of solid shaft.
Options
A. 1/16
B. 1/8
C. 1/4
D. 15/16
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Correct Answer: 15/16
4. In the below figure, the stress corresponding to point
D
is
Options
A. yield point stress
B. breaking stress
C. ultimate stress
D. elastic limit
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Correct Answer: ultimate stress
5. A beam of uniform strength has
Options
A. same cross-section throughout the beam
B. same bending stress at every section
C. same bending moment at every section
D. same shear stress at every section
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Correct Answer: same bending stress at every section
6. The ratio of change in volume to the original volume is called
Options
A. linear strain
B. lateral strain
C. volumetric strain
D. Poisson's ratio
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Correct Answer: volumetric strain
7. The shear force diagram for a simply supported beam carrying a uniformly distributed load of
w
per unit length, consists of
Options
A. one right angled triangle
B. two right angled triangles
C. one equilateral triangle
D. two equilateral triangles
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Correct Answer: two right angled triangles
8. When a closely-coiled helical spring is subjected to an axial load, it is said to be under
Options
A. bending
B. shear
C. torsion
D. crushing
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Correct Answer: torsion
9. When two shafts of same length, one of which is hollow, transmit equal torques and have equal maximum stress, then they should have equal
Options
A. polar moment of inertia
B. polar modulus
C. diameter
D. angle of twist
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Correct Answer: polar modulus
10. For a 25 mm hole drilled in plates, the diameter of rivet shank should be
Options
A. 23mm
B. 24.5mm
C. 25mm
D. 26mm
Show Answer
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Correct Answer: 23mm
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