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.
| 151. |
The rate of flow in stream with 40% O₂ and 60% CO₂ is 10 mole/hr, the contained was initially filled with 6 mole of O₂, what will be the percentage of O₂ in product stream? |
| A. | 12.5 |
| B. | 25 |
| C. | 50 |
| D. | 62.5 |
| Answer» E. | |
| 152. |
A reactor is supplied with 10 moles glucose and excess oxygen to produce CO₂ and H₂O, if the rate of products is 25 moles, what is the percentage of CO₂ in the products? |
| A. | 0.1 |
| B. | 0.2 |
| C. | 0.3 |
| D. | 0.4 |
| Answer» E. | |
| 153. |
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 H₂O are produced? |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 6 |
| Answer» E. | |
| 154. |
How many independent equation are possible if 1 has pure A, 2 has mixture of B and C, 3 has mixture of A, B and C, 4 has pure C, 5 has mixture of A and B. |
| A. | 1 |
| B. | 3 |
| C. | 6 |
| D. | 9 |
| Answer» D. 9 | |
| 155. |
Answer the following question for the diagram given below.What is the value of W? |
| A. | 159.2 Kg/hr |
| B. | 281.3 Kg/hr |
| C. | 465.7 Kg/hr |
| D. | 633.8 Kg/hr |
| Answer» B. 281.3 Kg/hr | |
| 156. |
In a batch process, 5 mole of SO₂ and 3 mole of CO₂ entered a vessel with some SO₂, if 10 mole of product leaves the vessel, what is the percentage of SO₂ in the product? |
| A. | 10% |
| B. | 30% |
| C. | 50% |
| D. | 70% |
| Answer» E. | |
| 157. |
1 has pure A and 2 has pure B and 3, 4 and 5 has mixture of A and B, how many independent equations are possible? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 158. |
In a steady-state reactive system, 1 molar each of NaOH and HCl are supplied to the system both at the rate of 100 L/min, then what is the amount of NaCl produced? |
| A. | 1 molar |
| B. | 2 molar |
| C. | 3 molar |
| D. | 4 molar |
| Answer» B. 2 molar | |
| 159. |
Water flowing with TSS at the rate of 40 Liter/min, is discharged into a river flowing at the rate of 20 Liter/min, if the concentration of TSS in the river is 5 mg/L, what is the concentration of TSS in water? |
| A. | 5 mg/L |
| B. | 10 mg/L |
| C. | 15 mg/L |
| D. | 20 mg/L |
| Answer» C. 15 mg/L | |
| 160. |
A reactor is supplied with 5 moles of C₄H₁₀, and it undergoes following reactions C₄H₁₀ + 4H₂O -> 4CO + 9H₂ and C₄H₁₀ + 6.5O₂ -> 4CO₂ + 5H₂O, if 8 moles of CO₂ was produced and 2 moles of C₄H₁₀ remains unreacted, what are the number of moles of CO produced? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 161. |
A country 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 | |
| 162. |
An unsteady state system, the flow in rate of A is 10 mole/s, what is the flow out rate of B if the accumulation was 10 mole in 2 seconds? |
| A. | 5 mole/s |
| B. | 10 mole/s |
| C. | 15 mole/s |
| D. | 20 mole/s |
| Answer» B. 10 mole/s | |
| 163. |
The rate of flow in stream with 20% O₂ and 80% CO₂ is 5 mole/hr, the contained was initially filled with 3 mole of O₂, what will be the percentage of O₂ in product stream? |
| A. | 12.5 |
| B. | 25 |
| C. | 37.5 |
| D. | 50 |
| Answer» E. | |
| 164. |
The flow in rate of CH₄ and O₂ in a system are 2 mole/hr each what is the flow out rate of CO₂? |
| A. | 1 mole/hr |
| B. | 2 mole/hr |
| C. | 3 mole/hr |
| D. | 4 mole/hr |
| Answer» B. 2 mole/hr | |
| 165. |
A reactor has two feed streams with the ratio of their rate as 1:9 and has O₂ and O₃ with the mass fraction of 0.6 and 0.4 in stream 1 and 0.2 and 0.8 in stream 2, what is the mass fraction of O₂ in the product side? |
| A. | 0.24 |
| B. | 0.48 |
| C. | 0.72 |
| D. | 0.96 |
| Answer» B. 0.48 | |
| 166. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO₂, 25% N₂ and stream-2 containing pure H₂S, if the product has 1200 grams of S, and the ratio of H₂S to H₂O is 5 and the ratio of SO₂ to H₂S is 2, what is the rate of streams? |
| A. | 10 mole |
| B. | 20 moles |
| C. | 30 moles |
| D. | 40 moles |
| Answer» D. 40 moles | |
| 167. |
A reactor is supplied with 2 streams both at same rates, one has pure Cl₂ , and another has pure C₂H₆, if the product has 20% C₂H₅Cl and 80% HCl, what is the ratio of rate of feed and rate of product? |
| A. | 0.2 |
| B. | 0.5 |
| C. | 2 |
| D. | 5 |
| Answer» B. 0.5 | |
| 168. |
Which of the following is constant in a closed system? |
| A. | Energy |
| B. | Mass |
| C. | Temperature |
| D. | Momentum |
| Answer» C. Temperature | |
| 169. |
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 C₃H₇O₄ in the product? |
| A. | 10 |
| B. | 16 |
| C. | 31 |
| D. | 43 |
| Answer» D. 43 | |
| 170. |
An unsteady-state system, with 6 liters as initial amount of water in the vessel, water flow in rate is 2 liters/ s and flow out rate is 4 liters/s, what will be the amount of water in the vessel after 1 seconds? |
| A. | 2 liters |
| B. | 4 liters |
| C. | 6 liters |
| D. | 8 liters |
| Answer» C. 6 liters | |
| 171. |
In a steady-state reactive system, 2 molar NaCl and 1 molar H₂CO₃ are supplied to the system both at the rate of 100 mole/min, then how much Na₂CO₃ produced? |
| A. | 1 molar |
| B. | 2 molar |
| C. | 3 molar |
| D. | 4 molar |
| Answer» B. 2 molar | |
| 172. |
A reactor is supplied with 45 moles of C, and it undergoes following reactions C + 0.5O₂ -> CO and C + O₂ -> CO₂, if 25 moles of CO₂ was produced and 6 moles of C remains unreacted, what are the number of moles of CO produced? |
| A. | 6 |
| B. | 9 |
| C. | 14 |
| D. | 17 |
| Answer» D. 17 | |
| 173. |
A fluid enters a vessel at the rate of 10 liters/s, and leaves in two pathways one with 5 liters/s and other with 3 liters/s, then what type of flow it is? |
| A. | Steady-state |
| B. | Unsteady-state |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» C. Cannot say | |
| 174. |
In a steady-state reactive system, NaCl and H₂CO₃ are supplied to the system at the rate of 200 L/min and 100 L/min respectively, what is the rate at which Na₂CO₃ is produced? |
| A. | 100 L/min |
| B. | 200 L/min |
| C. | 300 L/min |
| D. | 400 L/min |
| Answer» D. 400 L/min | |
| 175. |
Tap filling a jar with water is an example of which of the following process? |
| A. | Batch |
| B. | Semi-batch |
| C. | Neither of them |
| D. | Batch & Semi-batch |
| Answer» C. Neither of them | |
| 176. |
CH₄ at the rate 10 mole/min is reacted with O₂ at the rate 10 mole/min, what is the rate of formation of CO₂ in the product? |
| A. | 5 mole/min |
| B. | 10 mole/min |
| C. | 20 mole/min |
| D. | 40 mole/min |
| Answer» B. 10 mole/min | |
| 177. |
In a batch process, 50 Kg of H₂O and 40 Kg of CO₂ entered a vessel with some H₂O, if 100 Kg of product leaves the vessel, what is the percentage of H₂O in the product? |
| A. | 10% |
| B. | 30% |
| C. | 60% |
| D. | 80% |
| Answer» D. 80% | |
| 178. |
A reactor is supplied with Hexane and hydrogen to produce 20% methane, 30% propane and 50% butane, what is the ratio of hydrogen consumed and the hexane reacted? |
| A. | 0.21 |
| B. | 0.45 |
| C. | 0.59 |
| D. | 0.73 |
| Answer» E. | |
| 179. |
A reaction occurs in a vessel such that its mass does not change but its temperature is increased, then the system is which of the following? |
| A. | Steady-state |
| B. | Unsteady-state |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» C. Cannot say | |
| 180. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO₂, 25% N₂ and stream-2 containing pure H₂S, if the product has 1200 grams of S, and the ratio of H₂S to H₂O is 5 and the ratio of SO₂ to H₂S is 2, what is percentage of Sulfur in the product? |
| A. | 23% |
| B. | 47% |
| C. | 61% |
| D. | 84% |
| Answer» D. 84% | |
| 181. |
The flow in rate of C₃H₈ and O₂ in a system are 2 mole/hr each what is the flow out rate of CO₂? |
| A. | 1 mole/hr |
| B. | 1.2 mole/hr |
| C. | 1.5 mole/hr |
| D. | 2 mole/hr |
| Answer» C. 1.5 mole/hr | |
| 182. |
In a system if, Accumulation = Generation – Consumption, where both the terms are distinct and non-zero, then the system is which of the following? |
| A. | Steady-state |
| B. | Closed |
| C. | Non-reactive |
| D. | None of the mentioned |
| Answer» C. Non-reactive | |
| 183. |
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 O₂ in products? |
| A. | 10.4% |
| B. | 25.8% |
| C. | 45.6% |
| D. | 78.2% |
| Answer» B. 25.8% | |
| 184. |
The flow in rate of A is 5 mole/s, it undergoes a reaction A -> 2B, what are the moles of B that comes out after 5 seconds? |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 50 |
| Answer» E. | |
| 185. |
What is the value of C? |
| A. | 400 Kg/hr |
| B. | 689.5 Kg/hr |
| C. | 819.6 Kg/hr |
| D. | 959.2 Kg/hr |
| Answer» E. | |
| 186. |
How many independent equations are possible if each stream contains mixture of A, B and C? |
| A. | 1 |
| B. | 3 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 187. |
What is the value of F*P in the following process? |
| A. | 25 |
| B. | 125 |
| C. | 150 |
| D. | 225 |
| Answer» C. 150 | |
| 188. |
In a steady-state reactive system, 5 molar CH₄ and 5 molar O₂ are supplied to the system, then what is the amount of CO₂ produced? |
| A. | 2.5 molar |
| B. | 5 molar |
| C. | 7.5 molar |
| D. | 10 molar |
| Answer» C. 7.5 molar | |
| 189. |
Feed of a reactor has 0.25 mass fraction of H₂O and 0.75 mass fraction of CO₂ with rate 4 g/hr, if the product rate is 20 g/hr what is the mass of CO₂ in the product side? |
| A. | 3 grams |
| B. | 9 grams |
| C. | 15 grams |
| D. | 21 grams |
| Answer» D. 21 grams | |
| 190. |
A 100 Kg liquid solid mixture with 10% solid and 90% liquid is input to a dryer, if the amount of evaporated water is 60% of the amount of input, what is the amount of liquid in the product? |
| A. | 10 Kg |
| B. | 20 Kg |
| C. | 30 Kg |
| D. | 40 Kg |
| Answer» D. 40 Kg | |
| 191. |
A reactor is supplied with 10 moles glucose and excess oxygen to produce 40% CO₂, 60% H₂O, what is the rate of products? |
| A. | 25 mole |
| B. | 50 mole |
| C. | 75 mole |
| D. | 100 mole |
| Answer» B. 50 mole | |
| 192. |
What is the value of P in the following process? |
| A. | 5 mole |
| B. | 10 mole |
| C. | 15 mole |
| D. | 20 mole |
| Answer» D. 20 mole | |
| 193. |
10 moles of O₂ is added to 10 moles of H₂, how many moles of H₂O will it produce? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 194. |
A combustion reaction has reactants 1 mole of CxHy and 2 moles of O₂ and products 1 mole of CO₂ and 2 mole of H₂O, what is x + y? |
| A. | 1 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 195. |
A container has 10 grams of water 5 grams of water is added and 2 grams of water is taken out, what is the final amount of water? |
| A. | 7 grams |
| B. | 10 grams |
| C. | 13 grams |
| D. | 15 grams |
| Answer» D. 15 grams | |
| 196. |
Which of the following does the concept of material balance based upon? |
| A. | Conservation of mass |
| B. | Conservation of energy |
| C. | Conservation of momentum |
| D. | Conservation of Volume |
| Answer» B. Conservation of energy | |
| 197. |
The equation of material balance, (Final condition + Sum of outputs) is equal to which of the following? |
| A. | Initial condition – Sum of inputs |
| B. | Initial condition + Sum of inputs |
| C. | Sum of inputs – Initial condition |
| D. | None of the mentioned |
| Answer» C. Sum of inputs – Initial condition | |
| 198. |
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_H2O_IN_THE_PRODUCT??$ |
| A. | 15 |
| B. | 23 |
| C. | 39 |
| D. | 51 |
| Answer» C. 39 | |
| 199. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO2, 25% N2 and stream-2 containing pure H2S, if the product has 1200 grams of S, and the ratio of H2S to H2O is 5 and the ratio of SO2 to H2S is 2, what fraction of limiting reagent is converted into product?$ |
| A. | 0.21 |
| B. | 0.46 |
| C. | 0.73 |
| D. | 0.83 |
| Answer» E. | |
| 200. |
A reactor is supplied with two steams with equal flow rates, stream-1 containing 75% SO2, 25% N2 and stream-2 containing pure H2S, if the product has 1200 grams of S, and the ratio of H2S to H2O is 5 and the ratio of SO2 to H2S is 2, what is percentage of Sulfur in the product? |
| A. | 23% |
| B. | 47% |
| C. | 61% |
| D. | 84% |
| Answer» D. 84% | |