Explore topic-wise MCQs in Mechanical Engineering.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

A maximum of how many rods may be connected using a knuckle joint?

A. 5
B. 2
C. 3
D. 4
Answer» D. 4
Discussion
2.

If t, ζ and P are thickness, permissible shear stress and applied axial load respectively on a cotter joint, the mean width of the collar is equal to.

A. \(\frac{{P}}{{2t\zeta }}\)
B. \(\frac{{{2P}}}{{t\zeta }}\)
C. \(\frac{{P}}{{t\zeta }}\)
D. none of these
Answer» B. \(\frac{{{2P}}}{{t\zeta }}\)
Discussion
3.

For a plate with an elliptical hole subjected to tensile stress, σ as shown in the figure, the maximum tensile stress at point P is

A. σ
B. 2σ
C. 3σ
D. More than 3σ
Answer» E.
Discussion
4.

For the given material, if the stress concentration factor is 2 and Notch sensitivity is 0.1, then the fatigue stress concentration factor is:

A. 1
B. 1.2
C. 1.1
D. 0.9
Answer» D. 0.9
Discussion
5.

Abrupt change of cross section in a member subject to load can result in __________.

A. thermal stresses
B. creep
C. stress concentration
D. fatigue
Answer» D. fatigue
Discussion
6.

A rectangular bar with a circular hole is to be made of a material with actual maximum permissible stress of 150 MPa. If stress concentration factor for the configuration is 3.0, what is the nominal average stress for sizing the section?

A. 450 MPa
B. 50 MPa
C. 147 MPa
D. None of these
Answer» C. 147 MPa
Discussion
7.

Endurance limit of a beam subjected to pure bending decreases with

A. decrease in the surface roughness and decrease in the size of the beam
B. increase in the surface roughness and decrease in the size of the beam
C. increase in the surface roughness and increase in the size of the beam
D. decrease in the surface roughness and increase in the size of the beam
Answer» D. decrease in the surface roughness and increase in the size of the beam
Discussion