MCQOPTIONS
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MCQOPTIONS
This section includes 361 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Which of the following is not an example of mechanical energy? |
| A. | Kinetic energy |
| B. | Potential energy |
| C. | Internal energy |
| D. | Work |
| Answer» D. Work | |
| 202. |
In a reaction the feed is 10 moles of 0.1 glucose and 0.9 water, and another feed of 5 moles of 0.2 glucose and 0.8 water, what is the total moles of product? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» D. 20 | |
| 203. |
What are the total degrees of freedom if the number of species are 5, total streams are 2, stream temperature 2, stream pressure 2 and heat released 1? |
| A. | 1 |
| B. | 5 |
| C. | 6 |
| D. | 12 |
| Answer» E. | |
| 204. |
Cp of water is 10 J/°C and that of steam is 15 J/°C, what is the enthalpy change of water from 75°C to 110°C at standard conditions, if the later heat of vaporization of water is 245 J? |
| A. | 395 J |
| B. | 645 J |
| C. | 840 J |
| D. | 999 J |
| Answer» C. 840 J | |
| 205. |
Which of the following is the humidity chart? |
| A. | Psychrometric chart |
| B. | Psychometric chart |
| C. | Psychological chart |
| D. | None of the mentioned |
| Answer» B. Psychometric chart | |
| 206. |
What are the number of degrees of freedom if the number of variables and number of equations are 10 and 8 respectively? |
| A. | 2 |
| B. | 8 |
| C. | 10 |
| D. | 18 |
| Answer» B. 8 | |
| 207. |
What is the energy balance of closed system? |
| A. | Matter in the system is constant |
| B. | Energy in the system is constant |
| C. | Neither energy nor matter is constant |
| D. | Both of energy and matter are constant |
| Answer» B. Energy in the system is constant | |
| 208. |
In air conditioning process, what has to be done first to the moist air? |
| A. | Heating |
| B. | Cooling |
| C. | Heating & Cooling |
| D. | None of mentioned |
| Answer» B. Cooling | |
| 209. |
What is the heat transferred from the system in humidification process? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 210. |
The interconnection equations are for which model? |
| A. | Mixing |
| B. | Splitting |
| C. | process |
| D. | All of the mentioned |
| Answer» B. Splitting | |
| 211. |
What does the interconnections between the unit modules represent? |
| A. | Information flow |
| B. | Material flow |
| C. | Energy flow |
| D. | All of the mentioned |
| Answer» E. | |
| 212. |
Two feeds, F1 with H = 10 J/mole and 5 moles with H = 20 J/mole, if the mole of products is 10 what is the enthalpy of products? |
| A. | 10 J/mole |
| B. | 15 J/mole |
| C. | 20 J/mole |
| D. | 25 J/mole |
| Answer» C. 20 J/mole | |
| 213. |
In the reaction C + O₂ -> CO₂, if the heat liberated is 10 J, what is the heat of formation of CO₂? |
| A. | -10 J |
| B. | 10 J |
| C. | 0 |
| D. | Cannot be determined |
| Answer» B. 10 J | |
| 214. |
What is the work done by 0.1 m³ saturated ethanol which evaporates to 10 kPa atmosphere to form 1 m³ of water vapor? |
| A. | 9 kJ |
| B. | -9 kJ |
| C. | 10 kJ |
| D. | -10 kJ |
| Answer» C. 10 kJ | |
| 215. |
What is the enthalpy change of a reaction at 45°C, if the enthalpy of reactant at 45°C and 25°C are 10 J and 6 J, and enthalpy of product at 45°C and 25°C are 15 J and 8 J, and the enthalpy change of reaction at 25°C is 10 J? |
| A. | 14 J |
| B. | 21 J |
| C. | 27 J |
| D. | 34 J |
| Answer» C. 27 J | |
| 216. |
10 Kg of water is pumped to a height of 2 m, the enthalpy is changed by 15 J/Kg, and work done by the motor is 50 J/Kg, assuming system is insulated what is the change in internal energy of water? |
| A. | 50 J |
| B. | 100 J |
| C. | 150 J |
| D. | 200 J |
| Answer» D. 200 J | |
| 217. |
What is the enthalpy change of solution if the enthalpy change of solute is 10 J, and enthalpy of solvent is 15 J? |
| A. | 10 J |
| B. | 15 J |
| C. | 25 J |
| D. | 40 J |
| Answer» D. 40 J | |
| 218. |
What is the reversible work done if 8 m³ of an ideal gas is compressed isothermally from 4 Pa to 16 Pa? |
| A. | 12.48 J |
| B. | 28.55 J |
| C. | 44.36 J |
| D. | 56.96 J |
| Answer» D. 56.96 J | |
| 219. |
What are the degrees of freedom? |
| A. | Total variables in the process |
| B. | Total species in the process |
| C. | Total reactions in the process |
| D. | None of the mentioned |
| Answer» B. Total species in the process | |
| 220. |
For an ideal gas isobaric process at pressure 1 Pa, the volume of the gas changes from 1 m³ to 5 m³, what is the work done by the gas? |
| A. | 1 J |
| B. | 4 J |
| C. | 5 J |
| D. | 10 J |
| Answer» C. 5 J | |
| 221. |
A mixture contains 30% Ar with CP = 30 J/°C, 30% N₂ with CP = 20 J/°C and 40% CH₄ with CP = 10 J/°C, what is the average CP of mixture? |
| A. | 7 J/°C |
| B. | 12 J/°C |
| C. | 19 J/°C |
| D. | 26 J/°C |
| Answer» D. 26 J/°C | |
| 222. |
To plot the web-bulb line one information is wet-bulb temperature, what can be the other information? |
| A. | Relative humidity |
| B. | Dry-bulb temperature |
| C. | Humidity |
| D. | All of the mentioned |
| Answer» E. | |
| 223. |
1 Kg of water (CP = 0.5 J/Kg°C) is pumped to a height of 0.5 m, work done by the motor is 40 J/Kg, and heat liberated by it is 10 J/Kg, what is the final temperature of water if the initial temperature was 10°C? |
| A. | 10°C |
| B. | 30°C |
| C. | 40°C |
| D. | 60°C |
| Answer» E. | |
| 224. |
Wet-bulb temperature is based on the equilibrium between rates of energy transfer to the bulb and which of the following? |
| A. | Evaporation of water |
| B. | Saturation of water |
| C. | Freezing of water |
| D. | None of the mentioned |
| Answer» B. Saturation of water | |
| 225. |
What is the efficiency of a heat engine with heat input 10 J and work output 7 J? |
| A. | 30% |
| B. | 70% |
| C. | 100% |
| D. | 140% |
| Answer» C. 100% | |
| 226. |
If Cp of liquid water is 10 J/°C, what is the enthalpy change of water at standard conditions from – 10°C to 0°C? |
| A. | 10 J |
| B. | 50 J |
| C. | 100 J |
| D. | Cannot be determined |
| Answer» E. | |
| 227. |
What are the number of equations associated with 2 process stream, if the number of species in the stream are 3? |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 10 |
| Answer» E. | |
| 228. |
If the reactions are unknown, is it possible to determine the degrees of freedom? |
| A. | Yes |
| B. | No |
| C. | Depends on the type of reaction |
| D. | None of the mentioned |
| Answer» C. Depends on the type of reaction | |
| 229. |
Two feeds, F1 with H = 10 J/mole and F2 with H = 20 J/mole, and product 10 moles with H = 15 J/mole, what is the F1? |
| A. | 5 mole |
| B. | 10 mole |
| C. | 15 mole |
| D. | 20 mole |
| Answer» B. 10 mole | |
| 230. |
In a reactor two stream are entering, one with N₂ at 10 atm and 27°C, and another with O₂ at 10 atm and 0°C, producing NO, NO₂, NO₃, and O₂ at 10 atm and 23°C, what are the total degrees of freedom? |
| A. | 12 |
| B. | 17 |
| C. | 19 |
| D. | 21 |
| Answer» D. 21 | |
| 231. |
Heat of formations of A, B, C, and D, are 5 J, 10 J, 15 J, and 20 J respectively, what is the heat of reaction A + 4B -> 3C + D? |
| A. | 10 J |
| B. | 20 J |
| C. | 35 J |
| D. | 45 J |
| Answer» C. 35 J | |
| 232. |
Enthalpy of reactants is 50 J/Kg and enthalpy of products is 25 J/Kg, what is the heat of reaction? |
| A. | -10 J/Kg |
| B. | 10 J/Kg |
| C. | -25 J/Kg |
| D. | 25 J/Kg |
| Answer» D. 25 J/Kg | |
| 233. |
Change in phase is an example of which process? |
| A. | Reversible |
| B. | Irreversible |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» C. Cannot say | |
| 234. |
Energy out and Energy in of a system are 40 J and 25 J respectively, what is the efficiency of the system? |
| A. | 40% |
| B. | 80% |
| C. | 160% |
| D. | 200% |
| Answer» D. 200% | |
| 235. |
Which of the following is a feature of process simulator? |
| A. | Equipment sizing functions |
| B. | Import and export data |
| C. | Scheduling of batch operations |
| D. | All of the mentioned |
| Answer» E. | |
| 236. |
In the humidity chart what does the horizontal axis represent? |
| A. | Air temperature |
| B. | Dry-Bulb temperature |
| C. | Wet-Bulb temperature |
| D. | None of the mentioned |
| Answer» C. Wet-Bulb temperature | |
| 237. |
What is the enthalpy of the reaction from 50°C to 52°C if CP = 15 J/°C, and the reference enthalpy is 25 J? |
| A. | 10 J |
| B. | 35 J |
| C. | 55 J |
| D. | 65 J |
| Answer» D. 65 J | |
| 238. |
1 Kg of water is pumped to a height of 1 m, the enthalpy is changed by 5 J/Kg, and work done by the motor is 25 J/Kg, assuming system is insulated what is the change in internal energy of water? |
| A. | 10 J |
| B. | 25 J |
| C. | 35 J |
| D. | 50 J |
| Answer» B. 25 J | |
| 239. |
Reversible process can be reversed by differential change in which of the following? |
| A. | Temperature |
| B. | Pressure |
| C. | Volume |
| D. | All of the mentioned |
| Answer» E. | |
| 240. |
Which process allows complete conversion of mechanical energy? |
| A. | Irreversible |
| B. | Reversible |
| C. | None of the mentioned |
| D. | Both of the mentioned |
| Answer» C. None of the mentioned | |
| 241. |
CP-T curve covers 10 J from 2°C to 10°C, what is the enthalpy change? |
| A. | 10 J |
| B. | 20 J |
| C. | 80 J |
| D. | 100 J |
| Answer» B. 20 J | |
| 242. |
What is the heat transferred from the system if the enthalpy of the output is 5 J and input is 10 J? |
| A. | -5 J |
| B. | -10 J |
| C. | -15 J |
| D. | 5 J |
| Answer» E. | |
| 243. |
What is the specific humidity, if pressure of water is 2 atm and total pressure is 12 atm? |
| A. | 20% |
| B. | 40% |
| C. | 50% |
| D. | 80% |
| Answer» E. | |
| 244. |
5 Kg of water is pumped to a height of 5 m, the enthalpy is changed by 10 J/Kg, and work done by the motor is 100 J/Kg, assuming system is insulated what is the change in internal energy of water? |
| A. | 50 J |
| B. | 100 J |
| C. | 150 J |
| D. | 200 J |
| Answer» E. | |
| 245. |
What is the humid volume of the system at 300°F with humidity 30%? |
| A. | 15.5 ft3/lb |
| B. | 28.4 ft3/lb |
| C. | 39.8 ft3/lb |
| D. | 55.2 ft3/lb |
| Answer» C. 39.8 ft3/lb | |
| 246. |
What is the efficiency of the system, if the actual work output from the process is 10 J and work output for a reversible process is 40 J? |
| A. | 10% |
| B. | 25% |
| C. | 40% |
| D. | 65% |
| Answer» C. 40% | |
| 247. |
In condensation, moist air is cooled below its which temperature? |
| A. | Dew-point temperature |
| B. | Dry-bulb temperature |
| C. | Wet-bulb temperature |
| D. | Saturation temperature |
| Answer» E. | |
| 248. |
Which of the following is required for the calculation of heat of reaction in the energy balance? |
| A. | Heat of solution at reference state |
| B. | Heat of dissolution at reference state |
| C. | Heat of formation |
| D. | All of the mentioned |
| Answer» E. | |
| 249. |
What is the enthalpy change of 8 mole solution if the enthalpy change of 5 mole solute is 10 J/mole, and enthalpy of 2 mole solvent is 15 J/mole? |
| A. | 10 J/mole |
| B. | 12 J/mole |
| C. | 13 J/mole |
| D. | 15 J/mole |
| Answer» B. 12 J/mole | |
| 250. |
What is the humid heat of a mixture of air (CP = 10 J) with water vapor (CP = 25 J), if the humidity is 20%? |
| A. | 15 J |
| B. | 20 J |
| C. | 25 J |
| D. | 30 J |
| Answer» B. 20 J | |