List of practice Questions

A multiple effect evaporator has a capacity to process 40000 kg of solid caustic soda per day when it is concentrating from 10% to 25% solids. The water evaporated in kilograms per day is:
The surface temperature of a blackbody is 400 K. What will be the emissive power?
Which of the following is true, when operating speed is less than critical speed?
What is the term for the ratio of the actual flow rate to the maximum rated flow rate of a flow meter?
Which among the following is an assumption of Hagen–Poiseuille equation?
While a propeller gives an axial liquid circulation pattern, a turbine gives ..............
In S.I. system, the unit of filter medium resistance is ..............
Surging is a phenomenon associated with:
What type of filtration relies on gravity to pull liquid through the filter medium?
If a combustion, 4 kg of organic compound gives 11 kg of CO$_2$, the percentage of carbon in the compound will be _________
Filter aids are added to the slurry prior to filtration in order to form ________
Pick the best difference between mixing and blending.
For transportation of boiler ash, which one of the following conveyors will be useful?
Centrifugal pumps transfer energy from _________
Which of the following equation must be perfunctorily satisfied while dealing with fluid flow problems?
The compound which does not react with ammonical silver nitrate solution is:
Using Newton-Raphson method to solve $f(x) = e^{-x} - x$ with initial guess $x_0 = 0$, find the next iteration.
The solution of the differential equation
\[ (D^3 - 5D^2 + 7D - 3)y = e^{-2x} \] is:
If $I = \frac{1}{2\pi i} \oint \frac{z e^{1/z}}{z} \, dz$ in the unit circle $|z| = 1$, then:
The given differential equation
$(x y^2 + n x^2 y) dx + (x^3 + x^2 y) dy = 0$ is exact when $n =$
If \( A = \begin{pmatrix} 1 & -1 \\ 2 & 3 \end{pmatrix} \) is a \( 2 \times 2 \) matrix, then the eigenvalues of the matrix \( 2A^2 - 4A + 5I \) are ______, where \( I \) is the \( 2 \times 2 \) unit matrix.

Find the current through 3 ohm resistor using superposition theorem

 

Consider a three-core, three-phase, 50 Hz, 11 kV cable whose conductors are denoted as R, Y and B in the given figure. The inter-phase capacitance (C1) between each pair of conductors is 0.2 $\mu$F and the capacitance (C2) between each line conductor and the sheath is 0.4 $\mu$F.

 

The bus impedance matrix of a 4-bus power system is given.

A branch having an impedance of \( j0.2 \Omega \) is connected between bus 2 and the reference. Then the values of \( Z_{22,new} \) and \( Z_{23,new} \) of the bus impedance matrix of the modified network are respectively _______.

 

In an inverting RC integrator using an Op-amp, \( RC = 1\,\text{s}, \, V_i = 5\,\text{V} \), then \( V_o = \, \_\_\_\_\_\_\_ \)