Recent questions

A circular water jet of diameter $50$ mm impinges with a velocity of $18 \mathrm{~m} / \mathrm{s}$ normal to a plate. The density of water is $1000 \mathrm{~kg} / \mathrm...

Consider the steady, incompressible flow of water in a horizontal pipe of constant diameter $1$ m with an inlet velocity of $12 \mathrm{~m} / \mathrm{s}$.As shown in figu...

The axial velocity profile of a laminar, incompressible and fully-developed flow in a circular pipe of radius $(R)$ is given as $u_{z}=-\frac{1}{4 \mu} \frac{\partial p}{...

The velocity potential function in a two-dimensional flow field is given by $\phi(x, y)=-\left(a x y+b x^{2}-b y^{2}\right) \mathrm{m}^{2} / \mathrm{s}$ where $\mathrm{a}...

Consider the incompressible, steady and irrotational flow through a concentric reducer in a horizontal pipeline. The pipe diameter reduces from $d_{1}=12 \mathrm{~cm}$ to...

Consider the incompressible fluid flow over a flat plate with a free stream velocity, $U_{\infty}=1 \mathrm{~m} / \mathrm{s}$. The fluid kinematic viscosity is $10^{-6} \...

The correct combination of phases in the one-component $\mathrm{H}_{2} \mathrm{O}$ phase diagram, as given below, is $\alpha$-water; $\beta$-vapour; $\gamma$-ice$\alpha-$...

Mechanical behaviour of a crystalline ceramic material is best described asductilebrittleviscoelasticViscoplastic

Differential scanning calorimetry involves measurement ofweight changeentropyheatvapour pressure

In ball milling of ceramic powder, selection of grinding media depends on the __________ difference between grinding media and powder particles.thermal conductivitydielec...

Which one of the following unit cell parameters represents a tetragonal crystal system?$\mathrm{a}=\mathrm{b}=\mathrm{c} ; \quad \alpha=\beta=\gamma \neq 90^{\circ}$$\mat...

Which of the following types of materials exhibit(s) positive magnetic susceptibility?ParamagneticDiamagneticFerrimagneticFerromagnetic

Which of the following is/are responsible for pitting corrosion in a metal?Rough surfaceGrain boundariesPolished surfacePolymer coated metal surface

In thermogravimetric analysis (TGA), weight change of a material sample during decomposition with temperature is shown in the figure below.$\mathrm{W}_{\mathrm{i}}$ and $...

The work done by a body expanding from an initial state $\text{A}$ to the final state $\text{B}$, as shown in the $\text{P-V}$ diagram below, is $\text{(in units of litre...

A binary phase diagram is given below.Which one of the following figures qualitatively represents the $\text{G-X}$ $\text{(Gibbs free energy - composition)}$ plot at temp...

Which one of the following figures corresponds to the density of states $g(E)$ of a typical intrinsic semiconductor? $\text{(E represents the energy level of a charge car...

The Miller indices for the shaded plane shown in the unit cell below is $[632]$$[123]$$(632)$$(123)$

Which one of the following curves best represents the $E$ vs. $f(E)$ behavior of the hot end of a metal rod demonstrating Seebeck Effect? $\text{$( f(E)$ is the probabili...

In a typical light emitting diode (LED), which of the following type(s) of materials is/are used?Indirect bandgap semiconductor with transition metal impuritiesDirect ban...

Which of the following options is/are true for glass transition temperature $\mathrm{T}_{\mathrm{g}}$ ?Above $\mathrm{T}_{\mathrm{g}}$, glass transforms from an amorphous...

Which of the following figures schematically represent(s) either the Frenkel defect or the Schotky defect in ionic solids?

Given that k is the first order reaction rate constant and T is the temperature in absolute scale, the temperature dependence of rate constant is/are represented by.

For chemical vapour deposition $\text{(CVD)}$ process, which of the following statements is/are correct?Target material is stripped off by the bombardment of positive ion...

At room temperature, the electrical conductivity and electron mobility for aluminium are $3.8 \times 10^{7}(\Omega \mathrm{m})^{-1}$ and $0.0012 \mathrm{~m}^{2}(\mathrm{~...

A $2$ mm thick palladium sheet of $1000 \mathrm{~mm}^{2}$ cross section is used as a diffusional membrane to purify hydrogen. The hydrogen concentration is maintained at ...

In X-ray powder diffraction pattern obtained from a face centered cubic $\text{(FCC)}$ metal, the first five reflections are at $\theta=21.65^{\circ}, 25.21^{\circ}, 37.0...

Consider a unidirectionally aligned continuous glass fibre reinforced epoxy composite with $40$ vol. $\%$ reinforcement. The elastic modulus of the composite along the fi...

The engineering stress $(\sigma)$ vs. engineering strain $(\varepsilon)$ curve obtained by conducting uniaxial tension test on a steel specimen is shown in the figure $\t...

An $\text{L}$-shaped rigid member is fixed at the midpoint of a simply-supported beam, as shown in figure $\text{(i)}$. The member is subjected to a vertically downward f...

A block of weight $W$, placed on a surface, is subjected to a horizontal force $P$ as shown in the figure. The line of action of force $P$ passes through the center-ofgra...

A mass $M$ is hung from a frictionless, massless pulley. The pulley is suspended by using an inextensible, massless rope of which one end is directly fixed to a support, ...

A simply-supported beam of rectangular cross-section $\text{(width $w$ and height $h$)}$ is subjected to the loads as shown in the figure $\text{(i)}$. The enlarged view ...

An ice-skater starts spinning during her performance. As she retracts her arms and legs closer to her body, her angular velocity __________.increasesdecreasesremains the ...

A solid circular shaft of diameter $100$ mm is subjected to a torque $3 \pi \mathrm{kNm}$. Which of the following statements about the state of stress in the shaft is/are...

A spring is connected to an elastic bar as shown in the figure. The spring has a stiffness constant of $10^{7} \mathrm{~N} / \mathrm{m}$. The bar is 70 mm long, and has a...

A particle of mass $1$ kg is attached to one end of a spring having stiffness of $125$ $\mathrm{N} / \mathrm{m}$. The free length of the spring is $100$ mm . The system i...

A $0-45-90$ strain gauge rosette is mounted on an aircraft wing. The co-ordinate system is placed such that the strain gauges $\mathrm{p}, \mathrm{q}$ and r are oriented ...

A rigid bar PQR is hinged at its end P . As shown in the figure, the bar is pinconnected through two identical links QS and RT at points Q and R , respectively. The other...

A pin-jointed truss has a pin support at the point E and a roller support at the point F. A horizontal force P is applied at pin H as shown in the figure. Which one of th...