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.
| 301. |
5 J of heat is taken out of the system and 20 J of work is done on the system, what is the change in internal energy of the system? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» D. 20 J | |
| 302. |
15 J of heat is supplied to a system and system does 5 J of work, what is the change in internal energy? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» C. 15 J | |
| 303. |
10 J of work is and 5 J of heat is supplied to the system, then the system is which of the following? |
| A. | Steady state |
| B. | Unsteady state |
| C. | Closed |
| D. | None of the mentioned |
| Answer» C. Closed | |
| 304. |
1 J of heat is supplied to the system and 1 kJ of work is done by the system, then the system is which of the following? |
| A. | Steady state |
| B. | Unsteady state |
| C. | Closed |
| D. | None of the mentioned |
| Answer» C. Closed | |
| 305. |
15 J of heat is supplied to a system and 15 J of work is done on the system, then the system is which of the following? |
| A. | Steady state |
| B. | Unsteady state |
| C. | Closed |
| D. | None of the mentioned |
| Answer» C. Closed | |
| 306. |
15 J of heat and 10 J of work is supplied to a system and 25 J of heat is taken out, then the system is which of the following? |
| A. | Steady state |
| B. | Unsteady state |
| C. | Closed |
| D. | None of the mentioned |
| Answer» B. Unsteady state | |
| 307. |
10 J of heat and 5 J of work is supplied to a system and 20 J of heat is taken out, then the system is which of the following? |
| A. | Steady state |
| B. | Unsteady state |
| C. | Closed |
| D. | None of the mentioned |
| Answer» C. Closed | |
| 308. |
What is ∆E for a steady-state system? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Cannot say |
| Answer» D. Cannot say | |
| 309. |
10 J of work is done on a steady state system, what is the heat supplied to the system? |
| A. | – 10 J |
| B. | 10 J |
| C. | 5 J |
| D. | 0 |
| Answer» B. 10 J | |
| 310. |
15 J of work is done by a steady state system, what is the heat supplied to the system? |
| A. | – 15 J |
| B. | 15 J |
| C. | 10 J |
| D. | – 10 J |
| Answer» C. 10 J | |
| 311. |
10 J of heat is taken off from a steady state system, what is the work done on the system? |
| A. | – 10 J |
| B. | 10 J |
| C. | – 5 J |
| D. | 5 J |
| Answer» C. – 5 J | |
| 312. |
5 J of heat is supplied to a steady state system, what is the work done by the system? |
| A. | – 5 J |
| B. | 5 J |
| C. | 0 |
| D. | 10 J |
| Answer» C. 0 | |
| 313. |
For an open unsteady state system, 10 J of heat was supplied and 10 J of work was done by the system, what is the value of change in enthalpy? |
| A. | 0 |
| B. | 10 J |
| C. | 20 J |
| D. | – 20 J |
| Answer» B. 10 J | |
| 314. |
For an open unsteady state system, 5 J of heat was supplied and 10 J of work was done on the system, what is the value of change in enthalpy? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» D. 20 J | |
| 315. |
For an open unsteady state system, 15 J of heat was supplied and -5 J of work was done on the system, what is the value of change in enthalpy? |
| A. | 10 J |
| B. | – 15 J |
| C. | 20 J |
| D. | – 25 J |
| Answer» B. – 15 J | |
| 316. |
For an open unsteady state system, 15 J of heat was taken off and 10 J of work was done by the system, what is the value of change in enthalpy? |
| A. | – 5 J |
| B. | 5 J |
| C. | 25 J |
| D. | – 25 J |
| Answer» B. 5 J | |
| 317. |
For an open unsteady state system, 5 J of heat was supplied and 10 J of work was done by the system, what is the value of change in enthalpy? |
| A. | – 5 J |
| B. | 5 J |
| C. | 10 J |
| D. | 15 J |
| Answer» B. 5 J | |
| 318. |
What is the enthalpy of a mixture having 20% of A with enthalpy 15 J, and 80% of B with enthalpy 25 J? |
| A. | 17 J |
| B. | 19 J |
| C. | 23 J |
| D. | 28 J |
| Answer» D. 28 J | |
| 319. |
Enthalpy of a stream is which function of temperature and pressure? |
| A. | Explicit |
| B. | Implicit |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» B. Implicit | |
| 320. |
In an open, steady state system if the heat transferred is 10 J and work done by the system is 5 J, what is the change in Potential energy (neglect kinetic energy)? |
| A. | 5 J |
| B. | -5J |
| C. | 15 J |
| D. | -15 J |
| Answer» B. -5J | |
| 321. |
What is the heat transferred to 2 Kg and 5 m³ of a rigid system, with change in enthalpy 5 J/Kg? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» C. 15 J | |
| 322. |
What is the humid heat of a mixture of air (CP = 10 J) with water vapor (CP = 15 J), if the humidity is 60%? |
| A. | 10 J |
| B. | 14 J |
| C. | 19 J |
| D. | 23 J |
| Answer» D. 23 J | |
| 323. |
What are the total degrees of freedom if the number of species are 8, total streams are 3, stream temperature 3, stream pressure 3 and heat released 1, extent of reaction 2? |
| A. | 8 |
| B. | 12 |
| C. | 15 |
| D. | 17 |
| Answer» E. | |
| 324. |
The humidity at dry-bulb temperature of 20°C is 40% and the humidity at dry-bulb temperature of 25°C is 25%, what is the slope of adiabatic cooling line? |
| A. | 0.03 |
| B. | -0.03 |
| C. | 0.05 |
| D. | -0.05 |
| Answer» C. 0.05 | |
| 325. |
Heat of formations of A, B, C, and D, are 1 J, 2 J, 3 J, and 4 J respectively, what is the heat of reaction 3A + 4B -> 2C + D? |
| A. | -1 J |
| B. | 1 J |
| C. | 3 J |
| D. | 6 J |
| Answer» B. 1 J | |
| 326. |
What is the efficiency of the system, if the actual work output from the process is 20 J and work output for a reversible process is 25 J? |
| A. | 10% |
| B. | 20% |
| C. | 40% |
| D. | 80% |
| Answer» E. | |
| 327. |
The feed of a process simulator is 5 mole with enthalpy 3 J/mole, the heat input is 15 J, and the work performed is 20 J, what will be the product enthalpy if mole of the product are 2? |
| A. | 1 J/mole |
| B. | 2 J/mole |
| C. | 3 J/mole |
| D. | 5 J/mole |
| Answer» E. | |
| 328. |
What is the enthalpy change of a reaction at 35°C, if the enthalpy of reactant at 35°C and 25°C are 18 J and 10 J, and enthalpy of product at 35°C and 25°C are 12 J and 8 J, and the enthalpy change of reaction at 25°C is 15 J? |
| A. | 9 J |
| B. | 14 J |
| C. | 22 J |
| D. | 27 J |
| Answer» E. | |
| 329. |
What is the enthalpy of a reaction, if the standard heat of formation of compound is 10 J, sensible heat of the compound is 30 J, and latent heat of the compound is 20 J? |
| A. | 10 J |
| B. | 30 J |
| C. | 40 J |
| D. | 60 J |
| Answer» E. | |
| 330. |
What is the heat of reaction if the heat of combustion of products is 40 J and heat of combustion of reactants is 25 J? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | -15 J |
| Answer» E. | |
| 331. |
What is the final enthalpy of the solution made by mixing 100 grams of 10% NaOH having enthalpy 40 J with 300 grams of 90% NaOH having enthalpy 20 J? |
| A. | 10 J |
| B. | 15 J |
| C. | 25 J |
| D. | 40 J |
| Answer» D. 40 J | |
| 332. |
What is the heat of reaction for 2CO + O₂ -> 2CO₂, if the heat of combustion of CO = 20 J, O₂ = 5 J, and CO₂ = 25 J? |
| A. | 5 J |
| B. | -5 J |
| C. | 15 J |
| D. | -15 J |
| Answer» D. -15 J | |
| 333. |
What is the specific humidity, if mass of water is 15 g and mass of bone dry air is 25 g? |
| A. | 10% |
| B. | 30% |
| C. | 40% |
| D. | 60% |
| Answer» E. | |
| 334. |
10 J of heat and 5 J of work are supplied to the system, what is the change in internal energy? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» D. 20 J | |
| 335. |
Two feeds, 10 mole with 5 J/mole and 20 mole with 15 J/mole, product contains two streams, 5 mole with 10 J/mole and P with 25 J/mole, what is the value of P? |
| A. | 10 mole |
| B. | 12 mole |
| C. | 15 mole |
| D. | 18 mole |
| Answer» C. 15 mole | |
| 336. |
What is the enthalpy of reaction for CH₄ + 2O₂ -> CO₂ + 2H₂O, if the conversion of CH₄ is 50%, and heat of formation of CH₄, O₂, CO₂, and H₂O are 10 J, 0, 6 J and 4 J? |
| A. | 0 |
| B. | 2 J |
| C. | 4 J |
| D. | 6 J |
| Answer» C. 4 J | |
| 337. |
What is the heat transferred to the system, if change in enthalpy is 30 J and pressure, volume changed from 8 Pa, 5 m³ to 4 Pa, 12 m³? |
| A. | 12 J |
| B. | 15 J |
| C. | 18 J |
| D. | 22 J |
| Answer» E. | |
| 338. |
What is the heat of reaction if the heat of combustion of products is 2 J and heat of combustion of reactants is 10 J? |
| A. | 8 J |
| B. | -8 J |
| C. | 4 J |
| D. | -4 J |
| Answer» B. -8 J | |
| 339. |
What is the value of higher heating value if the value of lower heating value is 10 J and the product has 5 mole of H₂O and Enthalpy of vaporization is 4 J/mole at standard conditions? |
| A. | 10 J |
| B. | 20 J |
| C. | 30 J |
| D. | 40 J |
| Answer» D. 40 J | |
| 340. |
What is the reversible work done if 5 m³ of an ideal gas is compressed isothermally from 1 Pa to 5 Pa? |
| A. | 4.41 J |
| B. | 8.01 J |
| C. | 10.20 J |
| D. | 14.18 J |
| Answer» C. 10.20 J | |
| 341. |
What is the work of humidification process? |
| A. | Vaporization |
| B. | Freezing |
| C. | Condensing |
| D. | None of the mentioned |
| Answer» B. Freezing | |
| 342. |
Mixing of dissimilar substances is example of which process? |
| A. | Reversible |
| B. | Irreversible |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» C. Cannot say | |
| 343. |
Energy out and Energy in of a system are 10 J and 20 J respectively, what is the efficiency of the system? |
| A. | 20% |
| B. | 30% |
| C. | 40% |
| D. | 50% |
| Answer» E. | |
| 344. |
1 Kg of water (CP = 0.5 J/Kg°C) is pumped to a height of 1 m, work done by the motor is 20 J/Kg, and heat liberated by it is 5 J/Kg, what is the final temperature of water if the initial temperature was 20°C? |
| A. | 20°C |
| B. | 30°C |
| C. | 40°C |
| D. | 50°C |
| Answer» C. 40°C | |
| 345. |
If the temperature of the reaction is 25°C what will be the temperature of the products of the reaction for which theoretical flame temperature is defined? |
| A. | 25°C |
| B. | 45°C |
| C. | 75°C |
| D. | 100°C |
| Answer» D. 100°C | |
| 346. |
Which of the following is not found in process simulators? |
| A. | Heat exchangers |
| B. | Compressors |
| C. | Splitters |
| D. | None of the mentioned |
| Answer» E. | |
| 347. |
Two feeds, 15 moles with H = 10 J/mole and 10 with H = 20 J/mole, what is the enthalpy of products? |
| A. | 8 J/mole |
| B. | 12 J/mole |
| C. | 18 J/mole |
| D. | 25 J/mole |
| Answer» D. 25 J/mole | |
| 348. |
CP-T curve of H2 forms a rectangle of height 20 J/°C from 4°C to 5°C? |
| A. | 20 J |
| B. | 80 J |
| C. | 100 J |
| D. | 140 J |
| Answer» D. 140 J | |
| 349. |
The standard heat of reaction is heat of reaction for how many mole of compound? |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 350. |
The input mass in a process simulator is 5 Kg, what will be the output mass? |
| A. | 0 |
| B. | 5 Kg |
| C. | 8 Kg |
| D. | 10 Kg |
| Answer» C. 8 Kg | |