Recent questions tagged gatexe-2026

For a steady, laminar, and incompressible flow over a flat plate, the local skin friction coefficient is given as $C_f = \dfrac{0.664}{\sqrt{Re_x}}$ where $\mathrm{Re}_{x...

The axial velocity profile of a laminar, incompressible, and fully-developed flow in a circular pipe of radius $R$ is given as $v_{z}=\dfrac{1}{4 \mu} \dfrac{d p}{d z}\le...

Air flows through a pipe of diameter $D$ with an average velocity of $3 \mathrm{~m}. \mathrm{s}^{-1}$. The Darcy friction factor of the pipe is $0.02$. Assume acceleratio...

The band gap of a material is $E_{g}$ and the energy of an incident photon is $E_{p}$. Optical absorption will occur in this material if,$E_{g} < E_{p}$$E_{g}>E_{p}$Elect...

Discoloration and loss of mechanical strength of plastic chairs exposed to sunlight for several days is due toHydrophilic degradationOxidative degradationPhoto-degradatio...

Which one of the following polymer processing techniques involves shaping a heated sheet?ThermoformingInjection moldingBlow moldingExtrusion

 The plot shows three different paths ($1,2,$ and $3$) connecting the initial equilibrium state $\text{X}$ to the final equilibrium state $\text{Y}$ in a thermodynamic pr...

Which of the following is/are polarization mechanisms in dielectric solids?Mechanical polarizationIonic polarizationElectronic polarizationThermal polarization

Which of these methods is/are used for the synthesis of ceramic powders?Sol-gelHydromechanicalThermomechanicalHydrothermal

The degrees of freedom of a system with $2$ components and $2$ phases in equilibrium is $\_\_\_\_$ (answer in integer).

 The interplanar spacing of ( $h~ k ~l$ ) planes is $4.5$ nm in a given crystal. For the ( $3h~ 3k ~3l$ ) planes, the interplanar spacing in nm is $\_\_\_\_\_$ (rounded o...

The equilibrium vacancy concentration in aluminum at $900$ $\mathrm{K}$ is $1.1 \times 10^{-4}$. The enthalpy of formation of vacancies in $\mathrm{kJ}. \mathrm{mol}^{-1}...

Three phases, $\alpha, \beta$ and $\mathrm{L}$ are shown in the binary phase diagram below. Identify the correct $\mathrm{G-X}$ (Gibbs free energy vs Composition) plot co...

In a cubic crystal, the Burgers vector for a mixed dislocation line is $\dfrac{a}{2}$ $[110]$. The dislocation line lies along the $[011]$ direction. The slip plane of th...

Match the Thermodynamic laws in Column $\text{I}$ with the description given in Column $\text{II}$${\text{Column I}}$${\text{Column II}}$$\text{P}$Zeroth law$1$Entropy of...

Match the material property in Column $\text{I}$ with the measurement technique in Column $\text{II}$.${\text{Column I}}$${\text{Column II}}$$\text{P}$Electrical conducti...

Which one of the following statements regarding point defects in ionic solids is correct?Frenkel defects are dominant in those ionic solids where there is a considerable ...

Consider $3$ crystals (all having FCC lattice) labelled as $\text{P, Q}$ and $\text{R}$ as described below:Crystal $\text{P}$: Cu crystal with $4$ $\text{Cu}$ atoms per u...

Which of the following statements is/are applicable to Fick's second law:Concentration changes with timeSteady state condition prevailsDiffusion is time dependentConcentr...

According to quantum free electron theory, which of the following statements is/are correct regarding the behavior of valence electrons in a metal?Valence electrons are l...