The ratio of the largest load in a test to the original cross-sectional area of

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Question
The ratio of the largest load in a test to the original cross-sectional area of the test piece is called
Options
A. elastic limit
B. yield stress
C. ultimate stress
D. breaking stress

Correct Answer

ultimate stress

Strength of Materials problems

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1. A simply supported beam 'A' of length l, breadth b and depth d carries a central load W. Another beam 'B' of the same dimensions carries a central load equal to 2 W. The deflection of beam 'B' will be __________ as that of beam 'A'.
Options
A. one-fourth
B. one-half
C. double
D. four times

2. According to Euler's column theory, the crippling load of a column is given by p = ?² EI/Cl². In the Euler's formula, the value of C for a column with one end fixed and the other end free, is
Options
A. 1/2
B. 1
C. 2
D. 4

3. Which of the following statement is wrong?
Options
A. In the theory of simple bending, the assumption is that the plane sections before bending remains plane after bending.
B. In a beam subjected to bending moment, the strain is directly proportional to the distance from the neutral axis.
C. At the neutral axis of a beam, the bending stress is maximum.
D. The bending stress in a beam is inversely proportional to the section modulus.

4. The design of thin cylindrical shells is based on
Options
A. hoop stress
B. longitudinal stress
C. arithmetic mean of the hoop and the longitudinal stress
D. geometric mean of the hoop and longitudinal stress

8. Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2:5, then the ratio of modulus of elasticity of the two materials will be
Options
A. 2:5
B. 5:2
C. 4:3
D. 3:4

10. The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (?_x and ?_y) acting at a body across two mutually perpendicular planes. The resultant stress is given by
Options
A. OC
B. OP
C. OQ
D. PQ

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