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Thermal Stresses and Poisson's Ratio PYQ Achievers Practice Quiz 2

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Question 1

If the value of Poisson’s ratio is zero, then it means that __________.

Question 2

A steel rod of length L and diameter D, fixed at both ends, is uniformly heated to a temperature rise of T. The Young’s modulus is E and the coefficient of linear expansion is α. The thermal stress in the rod is Δ

Question 3

What will be the thermal stress (in MPa) developed in a rod with both ends fixed and having a diameter of 4 cm and length of 2 m,if experiences heating from temperature 50^oC to 200^oC. The coefficient of thermal expansion is α = 10 × 10^-6/^oC and young’s modulus is 250 GPa?

Question 4

A thin plate of uniform thickness is subject to pressure as shown in the figure below
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under the assumption or plane stress, which one or the following is correct?

Question 5

An initially stress-free massless elastic beam of length L and circular cross-section with diameter d (d << L) is held fixed between two walls as shown. The beam material has Young‟s modulus E and coefficient of thermal expansion

If the beam is slowly and uniformly heated, the temperature rise required to cause the beam to buckle is proportional to

Question 6

A steel cubic block of side 200 mm is subjected to hydrostatic pressure of 250 N/mm². The elastic modulus is 2 × 10⁵ N/mm² and Poisson’s ratio is 0.3 for steel. The side of the block is reduced by __________mm (round off to two decimal places).

Question 7

A solid cube of side 1 m is kept at a room temperature of 32^oC. The coefficient of linear thermal expansion of the cube material is 1 × 10^-5 /^oC and the bulk modulus is 200 GPa. If the cube is constrained all around and heated uniformly to 42^oC, then the magnitude of volumetric (mean) stress (in MPa) induced due to heating is _________.

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ESE & GATE CE Strength of Materials

Sep 16ESE & GATE CE