Explore topic-wise MCQs in Machine Design.

This section includes 17 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.

1.

According to principal stress theory, which option represents the correct relation between yield strength in shear (YSS) and the yield strength in tension (YST)?a) YSS=0.5YSTb) YSS=0.577YSTc) YST=0.5YSSd) YST=0.577YSS 12 .A beam subjected to bending moment undergoes which of the following stresses?

A. YSS=0.5YSTb) YSS=0.577YSTc) YST=0.5YSSd) YST=0.577YSS 12 .A beam subjected to bending moment undergoes which of the following stresses?a) Compressive
B. YSS=0.577YSTc) YST=0.5YSSd) YST=0.577YSS 12 .A beam subjected to bending moment undergoes which of the following stresses?a) Compressiveb) Tensile
C. YST=0.5YSSd) YST=0.577YSS 12 .A beam subjected to bending moment undergoes which of the following stresses?a) Compressiveb) Tensilec) Both compressive & tensile
D. YST=0.577YSS 12 .A beam subjected to bending moment undergoes which of the following stresses?a) Compressiveb) Tensilec) Both compressive & tensiled) None of the mentionedView Answer
Answer» B. YSS=0.577YSTc) YST=0.5YSSd) YST=0.577YSS 12 .A beam subjected to bending moment undergoes which of the following stresses?a) Compressiveb) Tensile
Discussion
2.

Modulus of rigidity for carbon steels is greater than that of grey cast iron.

A. True
B. False
Answer» B. False
Discussion
3.

Which of the following relationship is true? (p=Poisson’s ratio)

A. E=2G (1+p)
B. E=G (2+p)
C. E= 2(G+ p)
D. No relation exist between E, G and p
Answer» B. E=G (2+p)
Discussion
4.

If there are residual stresses in the material, than lower factor of safety is used.

A. True
B. False
Answer» C.
Discussion
5.

WHICH_OF_THE_FOLLOWING_RELATIONSHIP_IS_TRUE?_(P=POISSON‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_RATIO)?$#

A. E=2G (1+p)
B. E=G (2+p)
C. E= 2(G+ p)
D. No relation exist between E, G and p
Answer» B. E=G (2+p)
Discussion
6.

According to principal stress theory, which option represents the correct relation between yield strength in shear (YSS) and the yield strength in tension (YST)?$

A. YSS=0.5YST
B. YSS=0.577YST
C. YST=0.5YSS
D. YST=0.577YSS
Answer» B. YSS=0.577YST
Discussion
7.

Modulus_of_rigidity_for_carbon_steels_is_greater_than_that_of_grey_cast_iron.$

A. True
B. False
Answer» B. False
Discussion
8.

The bending stress varies _______ with the distance from the neutral axis.

A. Linearly
B. Inversely
C. Squarely
D. Bending stress is independent of distance from the neutral axis
Answer» B. Inversely
Discussion
9.

A_beam_subjected_to_bending_moment_undergoes_which_of_the_following_stresses?

A. Compressive
B. Tensile
C. Both compressive & tensile
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
10.

If there are residual stresses in the material, than lower factor of safety is used?

A. True
B. False
Answer» C.
Discussion
11.

The critical buckling load depends upon which of the following parameters?

A. Yield strength
B. Modulus of elasticity
C. Radius of gyration
D. Each of the mentioned
Answer» E.
Discussion
12.

Buckling is elastic instability which leads to sudden large lateral deflection.

A. True
B. False
Answer» B. False
Discussion
13.

Pitting occurs on _____ of the component.

A. Surface
B. Inner body
C. Inside or on surface
Answer» B. Inner body
Discussion
14.

For components made of ductile materials like steel, subjected to static loading which of the following strength is used as a failure of criterion?

A. Yield strength
B. Ultimate strength
C. Endurance limit
D. None of the mentioned
Answer» B. Ultimate strength
Discussion
15.

For cast iron components, which of the following strength are considered to be the failure criterion?

A. Ultimate tensile strength
B. Yield Strength
C. Endurance limit
D. None of the mentioned
Answer» B. Yield Strength
Discussion
16.

Type of load affects factor of safety.

A. True
B. False
Answer» B. False
Discussion
17.

A mechanical component may fail as a result of which of the following

A. elastic deflection
B. general yielding
C. fracture
D. each of the mentioned
Answer» B. general yielding
Discussion