Strength of materials true/false quiz-1

01. Two shafts 'A' and 'B' transmit the same power. The speed of shaft 'A' is 250 r.p.m. and that of shaft 'B' is 300 r.p.m. The shaft 'B' has the greater diameter.
A) True
B) False

02. The limit of eccentricity is based upon no tension condition.
A) True
B) False

03. The shear force of a simply supported beam carrying a central point load changes sign at its midpoint.
 A) Correct
 B) Incorrect

04. The maximum shear stress of a beam of triangular section occurs above the neutral axis.
A) Correct
B) Incorrect

05. The rivets are made from ductile material.
A) Yes
B) No

06. The efficiency of a riveted joint is the ratio of the strength of the joint to the strength of the solid plate.
A) True
B) False

07. Modulus of resilience is the proof resilience per unit volume of a material.
A) Correct
B) Incorrect

08. If the modulus of elasticity of a material is twice its modulus of rigidity, then the Poisson's ratio of the material is equal to zero.
A) Correct
B) Incorrect

09. A pressure vessel is said to be a thin shell when it is made of thin sheets.
A) Agree
B) Disagree

10. The bending moment diagram for a cantilever beam of length ‘l’ and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is a parabolic.
A) Agree
B) Disagree

11. The bending moment at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre is wl/4.
A) Yes
B) No

12. In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress is always a tensile stress where as the radial stress is a compressive stress
A) Correct
B) Incorrect

13. The maximum bending moment of a cantilever beam of length ‘l’ and carrying a uniformly distributed load of ‘w’ per unit length lies at the middle of its length.
A) True B) False

14. If the magnitude of direct stress and bending stress is equal, then there will be zero stress at one of the extreme ends of a column.
A) Agree
B) Disagree

15. The neutral axis of the symmetrical beam does not pass through the centriod of the beam.
A) Agree
B) Disagree

16. A uniformly distributed load may be assumed to behave like a point load at the centre of gravity of the load for all sorts of calculations.
A) Correct
B) Incorrect

17. The maximum shear stress in a thin spherical shell subjected to an internal pressure (p) is zero.
A) Yes
B) No

18. The equivalent length, of a given column with given end conditions, is the length of an equivalent column of the same material and cross-section with hinged ends, and having the value of crippling load equal to that of the given column.
A) True
B) False

19. The value of equivalent length is taken to be half of the actual length of a column with one end fixed and the other end free.
A) Agree
B) Disagree

20. According to Euler's column theory, the crippling load of a column is given by p = π² EI/Cl². In the Euler's formula, the value of C for a column with both ends fixed is 4.
A) Agree
B) Disagree


Answers
01. Answer: Option B
02. Answer: Option A
03. Answer: Option A
04. Answer: Option A
05. Answer: Option A
06. Answer: Option A
07. Answer: Option A
08. Answer: Option A
09. Answer: Option B
10. Answer: Option A
11. Answer: Option B
12. Answer: Option A
13. Answer: Option B
14. Answer: Option A
15. Answer: Option B
16. Answer: Option A
17. Answer: Option A
18. Answer: Option A
19. Answer: Option B
20. Answer: Option B