Stresses in Members MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Stresses in Members, a fundamental topic in the field of Mechanics of Materials. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Stresses in Members MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Stresses in Members mcq questions that explore various aspects of Stresses in Members problems. Each MCQ is crafted to challenge your understanding of Stresses in Members principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanics of Materials tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Stresses in Members MCQs are your pathway to success in mastering this essential Mechanics of Materials topic.

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Stresses in Members MCQs | Page 6 of 10

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Q51.
A steel rod 10mm in diameter and 1m long is heated from 20 to 100 degree celcius, E = 200 GPa and coefficient of thermal expansion is 12 x10⁻⁶ per degree celcius. Calculate the thermal stress developed?

a.

192 MPa(tensile)

b.

212 MPa(tensile)

c.

192 MPa(compressive)

d.

212 MPa(compressive)

Discuss
Answer: (c).192 MPa(compressive)
Q52.
A cube with a side length of 1m is heated uniformly a degree celcius above the room temperature and all the sides are free to expand. What will be the increase in the volume of the cube? Consider the coefficient of thermal expansion as unity.

a.

Zero

b.

1 m³

c.

2 m³

d.

3 m³

Discuss
Answer: (d).3 m³
Q53.
The thermal stress is a function of _____________

P. Coefficient of linear expansion
Q. Modulus of elasticity
R. Temperature rise

a.

P and Q

b.

Q and R

c.

Only P

d.

Only R

Discuss
Answer: (d).Only R
Q54.
A steel rod is heated from 25 to 250 degree celcius. Its coefficient of thermal expansion is 10⁻⁵ and E = 100 GN/m². if the rod is free to expand, the thermal stress developed in it is:

a.

100 kN/m²

b.

240 kN/m²

c.

Zero

d.

Infinity

Discuss
Answer: (c).Zero
Q55.
Which one of the following pairs is NOT correctly matched?

a.

Temperature strain with permitted expansion – ( αTl – δ)

b.

Temperature thrust – ( αTE)

c.

Temperature stress – (αTEA)

d.

Temperature stress with permitted expansion – E(αTl – δ) / l

Discuss
Answer: (a).Temperature strain with permitted expansion – ( αTl – δ)
Q56.
A steel rod of length L and diameter D, fixed at both ends, is uniformly heated to a temperature rise of δT. The Youngs modulus is E and the coefficient of linear expansion is unity. The thermal stress in the rod is ____________

a.

Zero

b.

T

c.

EδT

d.

EδTL

Discuss
Answer: (c).EδT
Q57.
A uniform, slender cylindrical rod is made of a homogeneous and isotropic material. The rod rests on a frictionless surface. The rod is heated uniformly. If the radial and longitudinal thermal stress are represented by σx and σz, then ___________

a.

σx = 0, σy = 0

b.

σx not equal to 0, σy = 0

c.

σx = 0, σy not equal to 0

d.

σx not equal to 0, σy not equal to 0

Discuss
Answer: (a).σx = 0, σy = 0
Q58.
Which one of the following are true for the thermal expansion coefficient?

a.

αaluminium > αbrass> αcopper > αsteel

b.

αbrass > αaluminium > αcopper > αsteel

c.

αcopper > αsteel > αaluminium > αbrass

d.

αsteel > αaluminium > αbrass > αcopper

Discuss
Answer: (a).αaluminium > αbrass> αcopper > αsteel
Q59.
The length, coefficient of thermal expansion and Youngs modulus of bar A are twice of bar B. If the temperature of both bars is increased by the same amount while preventing any expansion, then the ratio of stress developed in bar A to that in bar B will be ___________

a.

2

b.

4

c.

8

d.

16

Discuss
Answer: (b).4
Q60.
Which test is conducted to measure the ability of a material to resist scratching, abrasion, deformation and indentation?

a.

Creep test

b.

Fatigue test

c.

Hardness test

d.

Compression test

Discuss
Answer: (c).Hardness test
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