A. Internal energy
B. Enthalpy
C. Gibbs free energy
D. Helmholtz free energy
✅ The correct answer is option C.
Chemical Engineering MCQs
It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than
0.99
0.95
0.8
0.55
✅ The correct answer is option C.
In a shell and tube heat exchanger, the shortest centre to centre distance between the adjacent tubes is
called tube pitch.
called tube clearance.
always less than the diameter of the tube.
none of these.
✅ The correct answer is option A.
The dust collection efficiency of a cyclone separator
decreases with increase in gas flow rate.
is inversely proportional to the mass of the dust particle.
is directly proportional to the radius of the dust particle path.
none of these.
✅ The correct answer is option D.
The optimum size ratio for two mixed reactors in series depends on the kinetics of the reaction and the conversion level. For reaction orders more than one, the
equal sized reactors are the best.
smaller reactor should come first.
larger reactor should come first.
none of these.
✅ The correct answer is option B.
Column support for the roof of cylindrical storage tank must be provided for
small diameter tanks.
large diameter tanks.
small diameter tall tanks.
all tanks irrespective of their heights and diameters.
✅ The correct answer is option B.
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.
1
8
80
180
✅ The correct answer is option B.
In a shell and tube heat exchanger, the clearance of the tube is generally
not less than one-fourth of the tube diameter or 3/16″.
more than the tube diameter.
equal to the tube diameter.
more in case of triangular pitch as compared to the square pitch tube layout.
✅ The correct answer is option A.
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.
Flat plate
Hemispherical
Torispherical
Ellipsoidal
✅ The correct answer is option D.
Brass valves are usually made for pipe sizes __________ inches.
≤1
≤2
>2.5
>3.5
✅ The correct answer is option B.