Chemical Engineering - MCQ Practice Questions

In a semi-batch reactor where reactant A is fed continuously to a batch of reactant B, which advantage is realized?

A series of 3 identical CSTRs in cascade is used to process a first-order reaction with overall conversion X = 90%. Which statement is true?

In a fixed-bed catalytic reactor, what is the primary cause of catalyst deactivation by sintering?

Which reactor configuration would be best suited for a fast, highly exothermic reaction where precise temperature control is critical?

In a membrane reactor for an equilibrium-limited reaction, what is the primary advantage?

The mean residence time in a reactor can be calculated from RTD data using:

In a tubular reactor with axial dispersion, increasing the Peclet number (Pe) results in:

In a heterogeneous catalytic reaction, the overall rate is limited by which step if the external mass transfer coefficient is very small?

In a plug flow reactor (PFR), what is the relationship between conversion and reactor volume for a first-order reaction?

Which reactor configuration provides the highest conversion for an endothermic reaction at equilibrium?

In a CSTR operating at steady state, if volumetric flow rate increases while keeping concentration constant, what happens to conversion?

What does the Damköhler number (Da) represent in reactor design?

In a reactor with catalyst deactivation following first-order decay, what is the effect on reactant conversion over time?

For competitive-consecutive reactions: A → B (k₁), A → C (k₂), B → D (k₃), selectivity of B over C is defined as S_B/C = ?

In microbial fermentation kinetics, the Monod equation models specific growth rate. What happens when substrate concentration >> K_s?

For isothermal batch reactor with r = -dC_A/dt = kC_A^n, what is the integrated rate law for n=2?

For a reaction with activation energy E_a = 50 kJ/mol, by what factor does rate constant increase if temperature increases from 300K to 310K? (R = 8.314 J/mol·K)

In a CSTR operating at steady state with a first-order irreversible reaction A → B, if the volumetric flow rate is doubled while keeping reactor volume constant, how does the conversion of reactant A change?

Which thermodynamic potential is most useful for constant temperature and pressure processes?

For an ideal gas undergoing isothermal expansion, the work done is given by: