Explore topic-wise MCQs in Strength Materials.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Strength Materials knowledge and support exam preparation. Choose a topic below to get started.

1.

A composite bar of two sections of equal length and given diameter is under an axial pull of 15kN. What will be the stresses in the two sections in N/mm2?

A. 190.9 and 84.88
B. 190.9 and 44.35
C. 153.45 and 84088
D. 153045 and 44.35
Answer» B. 190.9 and 44.35
Discussion
2.

A composite bar of two sections of unequal length and equal diameter is under an axial pull of 10kN. What will be the stresses in the two sections?

A. 2.145 N/mm2
B. 3.18 N/mm2
C. 1.245 N/mm2
D. 2.145 N/mm2
Answer» C. 1.245 N/mm2
Discussion
3.

A composite bar of two sections of equal length and equal diameter is under an axial pull of 10kN. What will be the stresses in the two sections?

A. 3.18 N/mm2
B. 2.21 N/mm2
C. 3.45 N/mm2
D. 2.14 N/mm2
Answer» B. 2.21 N/mm2
Discussion
4.

Does the value of stress in each section of a composite bar is constant or not?

A. It changes in a relationship with the other sections as well
B. It changes with the total average length
C. It is constant for every bar
D. It is different in every bar in relation with the load applied and the cross sectional area
Answer» E.
Discussion
5.

An axial pull of 20 kN on a bar of two equal lengths of 20cm as shown with their respective dimensions. What will be the total extension of the bar if the young’s modulus = 2×105?

A. 0.200mm
B. 0.345mm
C. 0.509mm
D. 0.486mm
Answer» D. 0.486mm
Discussion
6.

An axial pull of 35000 N on a bar consisting of two lengths as shown with their respective dimensions. What will be the total extension of the bar if the young’s modulus = 2.1 x 105?

A. 0.153mm
B. 0.183mm
C. 0.197mm
D. 0.188mm
Answer» C. 0.197mm
Discussion
7.

An axial pull of 1kN is acting on a bar of consisting two equal lengths as shown but of dia 10cm and 20cm respectively. What will be the stresses in the two sections respectively in N/mm2?

A. 0.127 and 0.0031
B. 0.034 and 0.0045
C. 0.153 and 0.003
D. 0.124 and 0.124
Answer» B. 0.034 and 0.0045
Discussion
8.

An axial pull of 35000 N is acting on a bar consisting of two lengths as shown with their respective dimensions. What will be the stresses in the two sections respectively in N/mm2?

A. 111.408 and 49.5146
B. 111.408 and 17.85
C. 97.465 and 49.5146
D. 97.465 and 34.263
Answer» B. 111.408 and 17.85
Discussion
9.

DOES_THE_VALUE_OF_STRESS_IN_EACH_SECTION_OF_A_COMPOSITE_BAR_IS_CONSTANT_OR_NOT??$

A. It changes in a relationship with the other sections as well
B. It changes with the total average length
C. It is constant for every bar
D. It is different in every bar in relation with the load applied and the cross sectional area
Answer» B. It changes with the total average length
Discussion
10.

153m?

A. 0.183mm
B. 0.197mm
C. 0.188mm
Answer» B. 0.197mm
Discussion
11.

127 and 0.0031

A. 0.034 and 0.0045
B. 0.153 and 0.003
C. 0.124 and 0.124
Answer» D.
Discussion
12.

408 and 49.5146

A. 111.408 and 17.85
B. 97.465 and 49.5146
C. 97.465 and 34.263
Answer» B. 97.465 and 49.5146
Discussion
13.

If a bar of two sections of different diameters of same length are in a line and P load is acting axially on them then what will be the change in length of the bar?

A. PL/E x (1/A<sub>1</sub> + 1/A<sub>2</sub>)
B. P/E x (1/A<sub>1</sub> + 1/A<sub>2</sub>)
C. P/EL x (1/A<sub>1</sub> + 1/A<sub>2</sub>)
D. PE/L x (1/A<sub>1</sub> + 1/A<sub>2</sub>)
Answer» B. P/E x (1/A<sub>1</sub> + 1/A<sub>2</sub>)
Discussion
14.

If a bar of two different length are in a line and P load is acting axially on them then what will be the change in length of the bar if the radius of both different lengths is same?

A. P/E x (L<sub>1</sub> + L<sub>2</sub>)
B. PA/E x (L<sub>1</sub> + L<sub>2</sub>)
C. P/EA x (L<sub>1</sub> + L<sub>2</sub>)
D. E/PA x (L<sub>1</sub> + L<sub>2</sub>)
Answer» D. E/PA x (L<sub>1</sub> + L<sub>2</sub>)
Discussion