Explore topic-wise MCQs in Machine Design.

This section includes 16 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.

Distortion energy theory is slightly liberal as compared to maximum shear stress theory.

A. True
B. False
Answer» B. False
Discussion
2.

The total strain energy for a unit cube subjected to three principal stresses is given by?

A. U= [(σέ) ₁ + (σέ) ₂+ (σέ) ₃]/3
B. U= [(σ₁²+σ₂²+σ₃²)/2E] – (σ₁σ₂+σ₂σ₃+σ₃σ₁)2μ
C. U= [(σέ) ₁ + (σέ) ₂+ (σέ) ₃]/4
D. None of the mentioned
Answer» C. U= [(σέ) ₁ + (σέ) ₂+ (σέ) ₃]/4
Discussion
3.

The region of safety in maximum shear stress theory contains which of the given shape

A. Hexagon
B. Rectangle
C. Square
D. None of the mentioned
Answer» B. Rectangle
Discussion
4.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm². Find the minimum normal stress.

A. 45.4
B. 47.6
C. 48.2
D. 50.6
Answer» C. 48.2
Discussion
5.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm². Find the maximum normal stress.

A. 90
B. 92.4
C. 94.2
D. 96
Answer» C. 94.2
Discussion
6.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 10N/mm². Find the inclination of the plane in which shear stress is maximal.

A. 45’
B. 30’
C. 60’
D. 15’
Answer» B. 30’
Discussion
7.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm²Find the maximum amount of shear stress to which the body is subjected.

A. 22.4mm
B. 25mm
C. 26.3mm
D. 27.2mm
Answer» B. 25mm
Discussion
8.

DISTORTION_ENERGY_THEORY_IS_SLIGHTLY_LIBERAL_AS_COMPARED_TO_MAXIMUM_SHEAR_STRESS_THEORY.?$

A. True
B. False
Answer» B. False
Discussion
9.

THE_TOTAL_STRAIN_ENERGY_FOR_A_UNIT_CUBE_SUBJECTED_TO_THREE_PRINCIPAL_STRESSES_IS_GIVEN_BY??$

A. U= [(σέ) ₁ + (σέ) ₂+ (σέ) ₃]/3
B. U= [(σ₁²+σ₂²+σ₃²)/2E] – (σ₁σ₂+σ₂σ₃+σ₃σ₁)2μ
C. U= [(σέ) ₁ + (σέ) ₂+ (σέ) ₃]/4
D. None of the mentioned
Answer» C. U= [(‚âà√¨‚àö√¢‚âà√≠‚Äö√¢‚Ć) ‚Äö√Ñ√∂‚àö√°‚àö√ñ + (‚âà√¨‚àö√¢‚âà√≠‚Äö√¢‚Ć) ‚Äö√Ñ√∂‚àö√°‚àö√°+ (‚âà√¨‚àö√¢‚âà√≠‚Äö√¢‚Ć) ‚Äö√Ñ√∂‚àö√°‚àö√¢]/4
Discussion
10.

The region of safety in maximum shear stress theory contains which of the given shap?

A. Hexagon
B. Rectangle
C. Square
D. None of the mentioned
Answer» B. Rectangle
Discussion
11.

Maximum Principal Stress Theory is not good for brittle materials.

A. True
B. False
Answer» C.
Discussion
12.

If compressive yield stress and tensile yield stress are equivalent, then region of safety from maximum principal stress theory is of which shape?

A. Rectangle
B. Square
C. Circle
D. Ellipse
Answer» C. Circle
Discussion
13.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm². Find the maximum normal stress.$

A. 90
B. 92.4
C. 94.2
D. 96
Answer» C. 94.2
Discussion
14.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 10N/mm². Find the inclination of the plane in which shear stress is maximal.$

A. 45’
B. 30’
C. 60’
D. 15’
Answer» B. 30‚Äö√Ñ√∂‚àö√ë‚àö¬•
Discussion
15.

If a body is subjected to stresses in xy plane with stresses of 60N/mm² and 80N/mm² acting along x and y axes respectively. Also the shear stress acting is 20N/mm²Find the maximum amount of shear stress to which the body is subjected.$

A. 22.4mm
B. 25mm
C. 26.3mm
D. 27.2mm
Answer» B. 25mm
Discussion
16.

The normal stress is perpendicular to the area under considerations, while the shear stress acts over the area.

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