MCQOPTIONS
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MCQOPTIONS
This section includes 209 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
What is the accumulation in the system after 10 second if the out flow and in flow rates are 10 g/s and 15 g/s? |
| A. | 5 g |
| B. | 10 g |
| C. | 50 g |
| D. | 100 g |
| Answer» D. 100 g | |
| 102. |
What amount of 57 octane should be mixed with 3 liters of 63 octane to obtain 4 liters of 59 octane? |
| A. | 1 liter |
| B. | 2 liters |
| C. | 2.5 liters |
| D. | 4.5 liters |
| Answer» E. | |
| 103. |
The human body is an example of which of the following? |
| A. | Closed System |
| B. | Open System |
| C. | Isolated System |
| D. | None of the mentioned |
| Answer» C. Isolated System | |
| 104. |
Feed of a reactor has 0.75 mass fraction of O₂ and some SO₂, if the product rate is 1000 Kg/hr then what is the rate of SO₂ in the feed? |
| A. | 100 Kg/hr |
| B. | 250 Kg/hr |
| C. | 750 Kg/hr |
| D. | 1000 Kg/hr |
| Answer» C. 750 Kg/hr | |
| 105. |
A reactor has feed from 2 streams, one with rate 10 Kg/hr and other with 30 Kg/hr, and product side also has 2 streams one of which is at the rate of 15 Kg/hr, what is the rate of other product stream? |
| A. | 5 Kg/hr |
| B. | 15 Kg/hr |
| C. | 25 Kg/hr |
| D. | 35 Kg/hr |
| Answer» D. 35 Kg/hr | |
| 106. |
A reactor has feed of two streams, stream 1 has CO₂ and H₂O with mass fraction of 0.4 and 0.6 and rate 10 kg/hr, and stream 2 has CO₂ and H₂O with mass fraction 0.1 and 0.9 and rate 40 Kg/hr, what the mass fraction of CO₂ in the product stream? |
| A. | 0.08 |
| B. | 0.16 |
| C. | 0.24 |
| D. | 0.32 |
| Answer» C. 0.24 | |
| 107. |
An unsteady state system, the flow in rate of A is 5 mole/s, what is the flow out rate of B if the accumulation was 10 mole in 5 seconds? |
| A. | 1 mole/s |
| B. | 2 mole/s |
| C. | 3 mole/s |
| D. | 5 mole/s |
| Answer» D. 5 mole/s | |
| 108. |
10 moles of A were present in a system initially, and 10 moles of C are added to it, it follows the reaction 2A + C -> 5B, what are number of moles of B produced? |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 50 |
| Answer» D. 50 | |
| 109. |
A reaction has reactants 2 moles of NaOH and 1 mole of H₂SO₄, and products Na₂SO₄ and H₂O, what are the total moles of products? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 110. |
In a random reaction 2 mole of CH₄ and 1 mole of C₂H₄ are reacted, and 1 mole of C₃H₈ and 1 mole of CxHy are produced, what is x*y? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 12 |
| Answer» C. 8 | |
| 111. |
An unsteady state system, the flow in rate of A is 8 mole/s, what is the flow out rate of B if the accumulation was 6 mole in 2 seconds? |
| A. | 1 mole/s |
| B. | 2 mole/s |
| C. | 3 mole/s |
| D. | 5 mole/s |
| Answer» E. | |
| 112. |
A reactor is supplied with C₆H₁₂O₆ and the following reactions occur C₆H₁₂O₆ -> 2C₂H₅OH + 2CO₂ and C₆H₁₂O₆ –> 2C₂H₃CO₂H + 2H₂O, 360 grams of pure glucose is supplied and 44 grams of CO₂ was produced, what 90 grams of glucose left unreacted, how many grams of propenoic acid was produced? |
| A. | 18 |
| B. | 36 |
| C. | 72 |
| D. | 144 |
| Answer» E. | |
| 113. |
Solution-1 containing 10% nitric acid flowing at the rate 10 Kg/min combines with Solution-2 containing 40% nitric acid flowing at the rate 5 Kg/min, if their product contains 30% nitric acid, what is the flow rate of product? |
| A. | 10 Kg/min |
| B. | 20 Kg/min |
| C. | 30 Kg/min |
| D. | 40 Kg/min |
| Answer» B. 20 Kg/min | |
| 114. |
10 moles of A were present in a system initially, and 10 moles are added to it, it follows the reaction 4A -> B, what are number of moles of B produced? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» B. 10 | |
| 115. |
How is the boundary wall of a closed system? |
| A. | Impermeable |
| B. | Permeable |
| C. | Rigid |
| D. | None of the mentioned |
| Answer» B. Permeable | |
| 116. |
The flow in rate of A is 8 mole/s, it undergoes a reaction 3A -> B, what are the moles of B that comes out after 6 seconds? |
| A. | 5 |
| B. | 8 |
| C. | 10 |
| D. | 16 |
| Answer» E. | |
| 117. |
8 moles of A were present in a system initially, and 24 moles of B are added to it, it undergoes the reaction 2A + 3B -> 4C + 5D, what are number of moles of D produced? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» D. 40 | |
| 118. |
A reactor is supplied with 5 moles each of CH₃OH and O₂, and the following reactions occur, CH₃OH + 1/2O₂ -> CH₂O + H₂O and then CH₂O + 1/2O₂ -> CO + H₂O, the conversion of methanol is 80% in first reaction, and conversion of CH₂O is 50% in second reaction. How many moles of O₂ are there in the products? |
| A. | 1.75 |
| B. | 2 |
| C. | 3.25 |
| D. | 5.5 |
| Answer» B. 2 | |
| 119. |
A reactor is supplied with 20 moles of C, and it undergoes following reactions C + 0.5O₂ -> CO and C + O₂ -> CO₂, if 10 moles of CO₂ was produced and 5 moles of C remains unreacted, what are the number of moles of CO produced? |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» D. 7 | |
| 120. |
The rate of flow in stream with 20% CH₄ and 80% H₂O is 5 mole/hr, the contained was initially filled with 3 mole of H₂O, what will be the percentage of CH₄ in product stream? |
| A. | 5 |
| B. | 12.5 |
| C. | 25 |
| D. | 37.5 |
| Answer» C. 25 | |
| 121. |
A reactor is supplied with 25 moles of C, and it undergoes following reactions C + 0.5O₂ -> CO and C + O₂ -> CO₂, if 13 moles of CO₂ was produced and 5 moles of C remains unreacted, what are the number of moles of CO produced? |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» E. | |
| 122. |
An unsteady state system, the flow in rate of A is 6 mole/s, what is the flow out rate of B if the accumulation was 18 mole in 9 seconds? |
| A. | 1 mole/s |
| B. | 2 mole/s |
| C. | 3 mole/s |
| D. | 4 mole/s |
| Answer» E. | |
| 123. |
Ethane is supplied with chlorine in a reactor, how many independent element balances can you write? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 124. |
Water flowing with chlorine concentration 10 mg/L at the rate of 20 Liter/min, is discharged into a river, if the concentration of chlorine in river is 5 mg/L what is the flow rate of river? |
| A. | 10 Liter/min |
| B. | 20 Liter/min |
| C. | 30 Liter/min |
| D. | 40 Liter/min |
| Answer» B. 20 Liter/min | |
| 125. |
A gas mixture input is given to a membrane with 20% O₂ and 80% N₂, the waste contains 60% of the input and the product contains 30% O₂ and 70% N₂, what are the number of moles of O₂ in the waste? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | Can’t be determined |
| Answer» E. | |
| 126. |
Ethane is supplied at the rate F with oxygen at the rate W and leaves the following products CO₂, H₂O, O₂, C₂H₆ and H₂ at the rate P. How many independent element balances are possible? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 127. |
In a batch process, 5 mole of H₂ and 3 mole of CO₂ entered a vessel with some CO₂, if 10 mole of product leaves the vessel, what is the percentage of H₂ in the product? |
| A. | 10% |
| B. | 30% |
| C. | 50% |
| D. | 80% |
| Answer» D. 80% | |
| 128. |
What is the percentage of excess air if 50 grams of air is in excess and 150 grams of air enters the process? |
| A. | 10% |
| B. | 25% |
| C. | 50% |
| D. | 100% |
| Answer» D. 100% | |
| 129. |
Solution-1 containing 30% sulfuric acid flowing at the rate 10 Kg/min combines with Solution-2 containing 20% sulfuric acid flowing at the rate 5 Kg/min, if their product is out at the rate 20 Kg/min what is the percentage of sulfuric acid in the product? |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | 40% |
| Answer» C. 30% | |
| 130. |
Answer the following questions for the given diagram.What is the value of B? |
| A. | 100 Kg/hr |
| B. | 200 Kg/hr |
| C. | 300 Kg/hr |
| D. | 400 Kg/hr |
| Answer» C. 300 Kg/hr | |
| 131. |
A reaction is A + 2B -> 3C, if 2 moles of A and 4 moles of B entered the system, what are the number of moles of C formed? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 132. |
Solution-1 containing 30% acetic acid and 20% nitrogen at the rate F combines with Solution-2 containing 20% acetic acid and 10% nitrogen at the rate D and Solution-3 containing 10% acetic acid and 30% nitrogen at the rate N the product formed contains 20% acetic acid at the rate 10 Kg/min, what is the percentage of nitrogen in product? |
| A. | 10% |
| B. | 20% |
| C. | 30% |
| D. | Cannot be determined |
| Answer» E. | |
| 133. |
octane is burnt with 40% excess O₂, what is the percentage of CO₂ in products? |
| A. | 18.18% |
| B. | 36.36% |
| C. | 54.54% |
| D. | 72.72% |
| Answer» C. 54.54% | |
| 134. |
10 moles of A were present in a system initially, and 8 moles of C are added to it, it undergoes the reaction 5A + 3C -> 4B, what are number of moles of B produced? |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 10 |
| Answer» D. 10 | |
| 135. |
How many independent equations are possible, if two components are involved in each of streams? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 136. |
A liquid solid mixture with 10% solid and 90% liquid is input to a dryer, some of the liquid evaporated and the product contains 60% solid and 40% liquid, what is the ratio of amount of water evaporated and amount of input? |
| A. | 2:1 |
| B. | 3:2 |
| C. | 5:4 |
| D. | 6:5 |
| Answer» E. | |
| 137. |
A reactor is supplied with 5 moles each of CH₃OH and O₂, and the following reactions occur, CH₃OH + 1/2O₂ -> CH₂O + H₂O and then CH₂O + 1/2O₂ -> CO + H₂O, the conversion of methanol is 80% in first reaction, and conversion of CH₂O is 50% in second reaction. How many moles of CH₂O came out of the reactor? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 138. |
Ethene is burnt with 50% of excess air, what is the percentage of CO₂ in the products? |
| A. | 11.11% |
| B. | 36.36% |
| C. | 66.66% |
| D. | 72.72% |
| Answer» C. 66.66% | |
| 139. |
Methane is at the rate 50 moles is supplied to a reactor with air at the rate 1000 moles, the reactor leaves O₂, N₂, CO₂ and H₂O, what is the percentage of H₂O in products? |
| A. | 5.8% |
| B. | 9.5% |
| C. | 15.4% |
| D. | 20.7% |
| Answer» C. 15.4% | |
| 140. |
Answer the following question for the diagram.What is the value of F? |
| A. | 98.5 Kg/hr |
| B. | 131.1 Kg/hr |
| C. | 167.7 Kg/hr |
| D. | 256.4 Kg/hr |
| Answer» D. 256.4 Kg/hr | |
| 141. |
An egg is an example of which of the following? |
| A. | Closed System |
| B. | Open System |
| C. | Isolated System |
| D. | None of the mentioned |
| Answer» B. Open System | |
| 142. |
A semi-batch process is that in which material enters the system and _____ which of the following should fill the gap? |
| A. | Leaves |
| B. | Does not leaves |
| C. | Half of it leaves |
| D. | None of the mentioned |
| Answer» C. Half of it leaves | |
| 143. |
An unsteady state system, the flow in rate of A is 12 mole/s, what is the flow out rate of B if the accumulation was 18 mole in 3 seconds? |
| A. | 4 mole/s |
| B. | 6 mole/s |
| C. | 8 mole/s |
| D. | 9 mole/s |
| Answer» C. 8 mole/s | |
| 144. |
Solution-1 containing 40% nitric acid and 20% carbon dioxide at the rate F combines with Solution-2 containing 30% nitric acid and 40% carbon dioxide at the rate D, the product formed contains 30% nitric acid and 20% carbon dioxide at the rate P, If P = xF what is x? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 145. |
A reactor is supplied with 6 moles of CO and 3 moles of O₂ and produced 4 moles of CO₂, what is the extent of reaction? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 146. |
The general material balance equation for reactive system is Accumulation = Input + Generation – x, what is x? |
| A. | Consumption – Output |
| B. | Consumption + Output |
| C. | Output – Consumption |
| D. | None of the mentioned |
| Answer» C. Output – Consumption | |
| 147. |
In what ratio 57 octane and 63 octane should be mixed to obtain 59 octane? |
| A. | 1:1 |
| B. | 2:1 |
| C. | 3:1 |
| D. | 4:1 |
| Answer» C. 3:1 | |
| 148. |
What is the final amount of fluid in the vessel if the system is in steady state? |
| A. | Same as the initial amount |
| B. | Twice the initial amount |
| C. | Zero |
| D. | None of the mentioned |
| Answer» B. Twice the initial amount | |
| 149. |
An unsteady-state system, with 10 liters as initial amount of water in the vessel, water flow in rate is 8 liters/ s and flow out rate is 5 liters/s, what will be the amount of water in the vessel after 10 seconds? |
| A. | 10 liters |
| B. | 20 liters |
| C. | 30 liters |
| D. | 40 liters |
| Answer» E. | |
| 150. |
A reactor is supplied with a feed of composition 46% C₃H₇O₄, 44% O₂ and 10% N₂, if 50% of the limiting reagent is converted into product, what is the percentage of N₂ in the product? |
| A. | 8 |
| B. | 18 |
| C. | 34 |
| D. | 46 |
| Answer» B. 18 | |