MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For a gaseous reaction carried out in 25 litre PFR with 5molA/lit and space time 3 mins. Calculate the conversion attained if reaction kinetics is given as followsA → 2.5P, -rA = (2 min-1) CA . |
| A. | 0.45 |
| B. | 0.65 |
| C. | 0.95 |
| D. | 0.98 |
| Answer» D. 0.98 | |
| 2. |
Calculate the volume of CSTR in litre required to achieve 70% conversion. The feed contains 10 molA/litre with feed rate of 3 lit/min and rate constant 0.15 for the reaction -rA = k(CA)1.5. |
| A. | 3 |
| B. | 9 |
| C. | 18 |
| D. | 27 |
| Answer» E. | |
| 3. |
The performance equation for CSTR is_________a) \(\frac{τ}{CA0} = \frac{XA}{-rA} \) b) τ = \(\frac{XA}{-rA} \) c) τ = CA0 -rAd) τ = \(\frac{XA}{CA0(-r |
| A. | \(\frac{τ}{CA0} = \frac{XA}{-rA} \) |
| B. | τ = \(\frac{XA}{-rA} \) |
| C. | τ = CA0 -rA |
| D. | τ = \(\frac{XA}{CA0(-rA)} \) |
| Answer» B. τ = \(\frac{XA}{-rA} \) | |
| 4. |
Space time in terms of molar federate and initial concentration is _________ |
| A. | τ = CA0 V0 |
| B. | τ = \(\frac{CA0}{FA0} \) |
| C. | τ = CA0 V |
| D. | τ = \(\frac{VCA0}{FA0} \) |
| Answer» E. | |
| 5. |
A space time of 10 minutes means __________ |
| A. | 10 reactor volumes of feed is fed into the reactor per minute |
| B. | Feed is fed at 10 mins interval |
| C. | Takes 10 mins to treat one reactor volume of feed |
| D. | Reaction time is 10 hrs |
| Answer» D. Reaction time is 10 hrs | |
| 6. |
A space velocity of 7 hr-1 means ___________ |
| A. | 7 reactor volumes of feed is fed into the reactor per hour |
| B. | Feed is fed at 7 hrs interval |
| C. | Takes 7 hours to treat one reactor volume of feed |
| D. | Reaction time is 7 hours |
| Answer» B. Feed is fed at 7 hrs interval | |
| 7. |
In CSTR, the rate of reaction is evaluated at the exit conditions. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
The design equation of PBR to determine the weight of the catalyst is ________ |
| A. | \(\frac{W}{FA0} = \int_0^X \)-rA dX |
| B. | \(\frac{W}{FA0} = \int_0^X \frac{dX}{dV} \) |
| C. | W = FA0 \(\int_0^X \frac{dX}{-rA} \) |
| D. | W = \(\int_0^X \)FA0 dX |
| Answer» D. W = \(\int_0^X \)FA0 dX | |
| 9. |
The design equation for a plug flow reactor is ___________ |
| A. | V = \(\int_0^X\frac{dX}{-rA} \) |
| B. | V = FA0 \(\int_0^X\frac{dX}{-rA} \) |
| C. | \(\frac{V}{-rA} = \int_0^X\frac{dX}{FA0} \) |
| D. | FA0 = -rA\(\int_0^X\frac{dX}{V} \) |
| Answer» C. \(\frac{V}{-rA} = \int_0^X\frac{dX}{FA0} \) | |
| 10. |
The differential form of the plug flow reactor design equation is ______ |
| A. | FA0\(\frac{dX}{dV}\) = -rA |
| B. | \(\frac{dX}{dV}\) = -rA |
| C. | V\(\frac{dX}{dV}\) = -rA |
| D. | \(\frac{dX}{dV}\) = -rA FA0 |
| Answer» B. \(\frac{dX}{dV}\) = -rA | |