A. Increases
B. Decreases
C. Remains unchanged
D. Decreases linearly
✅ The correct answer is option A.
Chemical Engineering MCQs
The reaction A (l) R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The number of degrees of freedom are
A. 1
B. 2
C. 3
D. 0
✅ The correct answer is option B.
If we increase the pressure on a substance (which is at its triple point), then the triple point
A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease ; depends on the substance
✅ The correct answer is option C.
When a gas is expanded from high pressure region to low pressure region ; temper -ature change occurs. This phenomenon is related to the
A. Gibbs-Duhem equation
B. Gibbs-Helmholtz equation
C. Third law of thermodynamics
D. Joule-Thomson effect
✅ The correct answer is option D.
If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as
A. Solubility increases as temperature increases
B. Solubility increases as temperature decreases
C. Solubility is independent of temperature
D. Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution
✅ The correct answer is option B.
An ideal liquid refrigerant should
A. Not have a subatmospheric vapour pressure at the temperature in the refrigerator coils
B. Not have unduly high vapour pressure at the condenser temperature
C. Both A and B
D. Have low specific heat
✅ The correct answer is option C.
Pick out the wrong statement about the design of seive plate column and the bubble cap column.
The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns.
Weir length for a bubble cap plate is the same as that for the seive plate.
Weir height for a bubble cap plate column is the same as that for a seive plate column.
Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate.
✅ The correct answer is option C.
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.
nozzle or rim
flared out
fluid in
ring plate
✅ The correct answer is option A.
Longitundinal stress induced in a thin walled cylindrical storage vessel is
✅ The correct answer is option B.
The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.
shear
tensile
compressive
thermal
✅ The correct answer is option D.