GATE Chemical Engineering Practice Quiz

Question 1

A liquid of density $900\,\mathrm{kg\,m^{-3}}$ and viscosity $2.0\times 10^{-3}\,\mathrm{Pa\,s}$ flows through a smooth circular pipe of diameter $0.05\,\mathrm{m}$ with average velocity $2\,\mathrm{m\,s^{-1}}$. The Reynolds number is closest to

Accepted Answer

$4.5\times 10^4$

Question 2

For a first-order irreversible reaction $A\rightarrow B$ in a constant-volume batch reactor, the rate constant is $k=0.2\,\mathrm{min^{-1}}$. The time required to achieve $90\%$ conversion is closest to

Accepted Answer

$11.51\,\mathrm{min}$

Question 3

For a binary liquid mixture obeying Raoult's law at fixed temperature, the vapor pressures of pure components are $P_A^{sat}=80\,\mathrm{kPa}$ and $P_B^{sat}=40\,\mathrm{kPa}$. If the liquid mole fraction is $x_A=0.25$, the total pressure is

Accepted Answer

$50\,\mathrm{kPa}$

Question 4

A fluid is heated from $30^\circ\mathrm{C}$ to $70^\circ\mathrm{C}$ by condensing steam at constant temperature $120^\circ\mathrm{C}$ in a heat exchanger. Assuming negligible heat losses, the logarithmic mean temperature difference is closest to

Accepted Answer

$67.2^\circ\mathrm{C}$

Question 5

For laminar flow of a Newtonian liquid in a horizontal circular pipe, the average velocity is $1\,\mathrm{m\,s^{-1}}$. The maximum velocity in the pipe is

Accepted Answer

$2.0\,\mathrm{m\,s^{-1}}$

GATE Chemical Engineering

Practice Quizzes

GATE Chemical Engineering Practice Quiz

Ideal Gas Law Applications Fundamentals | GATE Chemical Engineering