Thermal Stress And Thermal Strain MCQ - Practice Questions with Answers

A metal rod of young modulus $Y$ and coefficient of thermal expansion $\alpha$ is held at its two ends such that its length remains invariant. If its temperature is raised by $t^{\circ }\mathrm{C}$ the linear stress developed in it is

A wooden wheel of radius R is made of two semicircular parts (see figure); The two parts are held together by a ring made of a metal strip of cross sectional area S and length L . L is slightly less than $2\pi R$ To fit the ring on the wheel, it is heated so that its temperature rises by $\mathrm{\Delta }T$ and it just steps over the wheel. As it cools down to surrounding temperature, it presses the semicircular parts together. If the coefficient of linear expansion of the metal is $\alpha$ and its Youngs' modulus is Y , the force that one part of the wheel applies on the other part is :

When a force is applied at one end of an elastic wire, it produces a strain $\epsilon$ in the wire. If $Y$ is Young's modulus of the material of the wire, the amount of energy stored per unit volume of the wire is given by

A wire, suspended vertically from one end, is stretched by attaching a weight of 20 N to the lower end. The weight stretches the wire by 1 mm. How much energy is gained by the wire?

A steel rod of diameter 1 cm is clamped firmly at each end when its temperature is ${25}^{\circ }\mathrm{C}$. So that it can't contract on cooling. The tension in the road $0^{\circ }\mathrm{C}$ is approximate. (Take, $\alpha ={10}^{-5}{1}^{\circ }\mathrm{c},y=2\times {10}^{11}\mathrm{N}/{\mathrm{m}}^2$ )

The temperature of a body on kelvin scale is found to be $xK$. When it is measured by Fahrenheit thermometer, it is found to be $x^{\circ }F$, then the value of $x$ is -

The hexose monophosphate shunt pathway takes place when there is

A metallic bar of Young’s modulus,$0.5\times {10}^{11}\mathrm{N}{\mathrm{m}}^{-2}$ and coefficient of linear thermal expansion ${10}^{-5}{}^{\circ }{\mathrm{C}}^{-1}$, length 1 m and area of cross-section 10^–3 m² is heated from 0°C to 100°C without expansion or bending. The compressive force developed in it is :