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.
| 51. |
What is the heat for the process for which theoretical flame temperature is defined? |
| A. | Positive |
| B. | Negative |
| C. | Zero |
| D. | Cannot say |
| Answer» D. Cannot say | |
| 52. |
Heat of formations of A, B, C, and D, are 2 J, 5 J, 3 J, and 10 J respectively, what is the heat of reaction 4A + 5B -> 2C + 2D? |
| A. | -10 J |
| B. | -7 J |
| C. | -5 J |
| D. | 0 |
| Answer» C. -5 J | |
| 53. |
CP-T curve of CO₂ forms a rectangle of height 10 J/°C from 5°C to 10°C? |
| A. | 10 J |
| B. | 50 J |
| C. | 100 J |
| D. | 250 J |
| Answer» C. 100 J | |
| 54. |
What is the height difference of the water (density = 1000 Kg/m³), if the change in Velocity is 6 m/s and change in pressure is 2000 Pa? |
| A. | 1.2 |
| B. | 2.0 |
| C. | 3.6 |
| D. | 4.4 |
| Answer» C. 3.6 | |
| 55. |
What happens to water in the humidification process? |
| A. | Evaporates |
| B. | Freezes |
| C. | Saturated |
| D. | None of the mentioned |
| Answer» B. Freezes | |
| 56. |
Enthalpy of reactants is 30 J/Kg and enthalpy of products is 10 J/Kg, what is the heat of reaction? |
| A. | -20 J/Kg |
| B. | 20 J/Kg |
| C. | -10 J/Kg |
| D. | 10 J/Kg |
| Answer» B. 20 J/Kg | |
| 57. |
A mixture contains 20% of A with Heat Capacity 10 J/°C and 80% of B with Heat Capacity 5 J/°C, what is the Heat Capacity of mixture? |
| A. | 6 J/°C |
| B. | 7 J/°C |
| C. | 8 J/°C |
| D. | 9 J/°C |
| Answer» B. 7 J/°C | |
| 58. |
What is the heating value of 10 Kg of coal with heat of combustion 10 J/Kg? |
| A. | -10 J |
| B. | 10 J |
| C. | -100 J |
| D. | 100 J |
| Answer» D. 100 J | |
| 59. |
A mixture contains 50% of A with Heat Capacity 10 J/°C and 50% of B with Heat Capacity 20 J/°C, what is the Heat Capacity of mixture? |
| A. | 12 J/°C |
| B. | 15 J/°C |
| C. | 17 J/°C |
| D. | 18 J/°C |
| Answer» C. 17 J/°C | |
| 60. |
What is the efficiency of the system, if the actual work input from the process is 20 J and work input for a reversible process is 25 J? |
| A. | 20% |
| B. | 80% |
| C. | 125% |
| D. | 150% |
| Answer» D. 150% | |
| 61. |
1 Kg of water is pumped to a height of 10 m, the enthalpy is changed by 50 J/Kg, and work done by the motor is 300 J/Kg, assuming system is insulated what is the change in internal energy of water? |
| A. | 100 J |
| B. | 150 J |
| C. | 200 J |
| D. | 300 J |
| Answer» C. 200 J | |
| 62. |
The feed of a process simulator is 10 J, the heat input is 5 J, and the work performed is 3 J, what will be the product enthalpy? |
| A. | 2 J |
| B. | 5 J |
| C. | 8 J |
| D. | 12 J |
| Answer» E. | |
| 63. |
What is the enthalpy of a reaction, if the standard heat of formation of compound is 15 J, sensible heat of the compound is 25 J, and latent heat of the compound is 10 J? |
| A. | 25 J |
| B. | 40 J |
| C. | 50 J |
| D. | 65 J |
| Answer» D. 65 J | |
| 64. |
What is the sensible heat of a reaction if the enthalpy of outputs is 15 J, and enthalpy of inputs is 5 J? |
| A. | 3 J |
| B. | 5 J |
| C. | 10 J |
| D. | 15 J |
| Answer» D. 15 J | |
| 65. |
Water having CP = 10 J/°C, is heated from 10°C to 50°C, what is the enthalpy change? |
| A. | 100 J |
| B. | 250 J |
| C. | 400 J |
| D. | 500 J |
| Answer» D. 500 J | |
| 66. |
What is the heat of dissolution if the heat of reaction is 10 J in the energy balance? |
| A. | -10 J |
| B. | 10 J |
| C. | 0 |
| D. | Cannot be determined |
| Answer» B. 10 J | |
| 67. |
In a reactor two stream are entering, one with H₂ at 10 atm and 27°C, and another with O₂ at 10 atm and 0°C, producing H₂O₂, H₂O, and O₂ at 10 atm and 23°C, what are the total degrees of freedom? |
| A. | 12 |
| B. | 17 |
| C. | 19 |
| D. | 23 |
| Answer» C. 19 | |
| 68. |
How is the graph of heat of solution and dilution? |
| A. | Straight Line |
| B. | Curve with finite heat of solution at infinite dilution |
| C. | Curve with Infinite heat of solution at infinite dilution |
| D. | None of the mentioned |
| Answer» C. Curve with Infinite heat of solution at infinite dilution | |
| 69. |
What is the work of drying process? |
| A. | Decreases the moisture content |
| B. | Vaporizes water |
| C. | Increases the moisture content |
| D. | None of the mentioned |
| Answer» B. Vaporizes water | |
| 70. |
How much the limiting reactant reacts in the process for which theoretical flame temperature is defined? |
| A. | Completely |
| B. | Partially |
| C. | Does not react |
| D. | None of the mentioned |
| Answer» B. Partially | |
| 71. |
Which of the following allows complete conversion of mechanical energy? |
| A. | Frictionless process |
| B. | Dissipative process |
| C. | Mixing of components |
| D. | All of the mentioned |
| Answer» B. Dissipative process | |
| 72. |
What is the solution of appropriate process material and energy balances? |
| A. | Flow sheeting |
| B. | Flow processing |
| C. | Flow Solving |
| D. | None of the mentioned |
| Answer» B. Flow processing | |
| 73. |
What is the coefficient of performance of a system, if its work input is 50 J and heat removed is 35 J? |
| A. | 35% |
| B. | 50% |
| C. | 70% |
| D. | 95% |
| Answer» D. 95% | |
| 74. |
What is the heat transferred to the system, if change in enthalpy is 25 J and change in pressure is 5 Pa at volume 3 m³? |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» C. 15 J | |
| 75. |
In a closed system, change in internal energy is 10 J and heat transferred to it is 10 J what is the work done by the system? |
| A. | 0 |
| B. | 10 J |
| C. | -20 J |
| D. | 20 J |
| Answer» B. 10 J | |
| 76. |
What is the enthalpy of a mixture having 10% of A with enthalpy 10 J, 30% of B with enthalpy 30 J, and 60% of C with enthalpy 25 J? |
| A. | 21 J |
| B. | 25 J |
| C. | 27 J |
| D. | 28 J |
| Answer» C. 27 J | |
| 77. |
For solving a process simulation which of the following is required? |
| A. | Material balances |
| B. | Equilibrium relations |
| C. | Energy balances |
| D. | All of the mentioned |
| Answer» E. | |
| 78. |
Heat of formations of A, B, C, and D, are 3 J, 5 J, 4 J, and 8 J respectively, what is the heat of reaction 2A + 2B -> 2C + D? |
| A. | -5 J |
| B. | 0 |
| C. | 5 J |
| D. | 8 J |
| Answer» C. 5 J | |
| 79. |
If Cp of steam is 105 J/°C, what is the enthalpy change of steam from 106°C to 118°C? |
| A. | 420 J |
| B. | 640 J |
| C. | 890 J |
| D. | 1260 J |
| Answer» E. | |
| 80. |
What is the work done by 0.5 m³ saturated ethanol which evaporates to 20 kPa atmosphere to form 2 m³ of water vapor? |
| A. | 20 kJ |
| B. | -20 kJ |
| C. | 30 kJ |
| D. | -30 kJ |
| Answer» E. | |
| 81. |
What are the number of degrees of freedom if the number of variables and number of equations are 15 and 5 respectively? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 82. |
In a reaction the feed is 10 moles of 0.1 glucose and 0.9 water, and another feed of 5 moles of 0.4 glucose and 0.6 water, what is the fraction of water in the products? |
| A. | 0.2 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.8 |
| Answer» E. | |
| 83. |
Energy out and Energy in of a system are 15 J and 25 J respectively, what is the efficiency of the system? |
| A. | 40% |
| B. | 60% |
| C. | 80% |
| D. | 110% |
| Answer» C. 80% | |
| 84. |
What is the enthalpy change of a reaction at 30°C, if the enthalpy of reactant at 30°C and 25°C are 18 J and 15 J, and enthalpy of product at 30°C and 25°C are 10 J and 8 J, and the enthalpy change of reaction at 25°C is 45 J? |
| A. | 10 J |
| B. | 25 J |
| C. | 50 J |
| D. | 100 J |
| Answer» D. 100 J | |
| 85. |
How are enthalpies of streams calculated? |
| A. | Relative to the reference state |
| B. | Absolutely |
| C. | Depends on the reaction |
| D. | None of the mentioned |
| Answer» B. Absolutely | |
| 86. |
In a reaction the feed is 5 moles of 0.5 glucose and 0.5 sucrose, and another feed of 15 moles of 0.3 glucose and 0.7 sucrose, what is the fraction of glucose in the products? |
| A. | 0.35 |
| B. | 0.45 |
| C. | 0.75 |
| D. | 0.95 |
| Answer» B. 0.45 | |
| 87. |
What are the number of degrees of freedom if the number of variables and number of equations are 18 and 7 respectively? |
| A. | 7 |
| B. | 9 |
| C. | 11 |
| D. | 15 |
| Answer» D. 15 | |
| 88. |
What is the coefficient of performance of a system, if its work input is 75 J and heat removed is 45 J? |
| A. | 20% |
| B. | 40% |
| C. | 60% |
| D. | 80% |
| Answer» D. 80% | |
| 89. |
What is the humid volume of the system at 150°F with humidity 50%? |
| A. | 12.4 ft3/lb |
| B. | 19.5 ft3/lb |
| C. | 27.7 ft3/lb |
| D. | 36.1 ft3/lb |
| Answer» D. 36.1 ft3/lb | |
| 90. |
What are the number of degrees of freedom if the number of variables and number of equations are 15 and 10 respectively? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 25 |
| Answer» B. 10 | |
| 91. |
What is the work done by saturated water which evaporates to 20 kPa atmosphere to form 1.5 m³ of water vapor? |
| A. | 20 kJ |
| B. | -20 kJ |
| C. | 30 kJ |
| D. | -30 kJ |
| Answer» E. | |
| 92. |
Fluid flow through pipe is an example of which process? |
| A. | Reversible |
| B. | Irreversible |
| C. | Cannot say |
| D. | None of the mentioned |
| Answer» C. Cannot say | |
| 93. |
Which of the following is the summation of volume of 1 Kg of dry air and the water vapor in the air? |
| A. | Humid volume |
| B. | Partial volume |
| C. | Dry volume |
| D. | None of the mentioned |
| Answer» B. Partial volume | |
| 94. |
What is the enthalpy of reaction for C + O₂ -> CO₂, if the conversion of C is 50%, and heat of formation of C, O₂, and CO₂ are 0, 0 and 10 J. |
| A. | 5 J |
| B. | 10 J |
| C. | 15 J |
| D. | 20 J |
| Answer» B. 10 J | |
| 95. |
What is required in the calculation of heat of reaction in the energy balance of mixing? |
| A. | Heat of formation |
| B. | Sensible Heat |
| C. | Latent heat |
| D. | All of the mentioned |
| Answer» B. Sensible Heat | |
| 96. |
What are the number of degrees of freedom if the number of variables and number of equations are 21 and 9 respectively? |
| A. | 7 |
| B. | 9 |
| C. | 10 |
| D. | 12 |
| Answer» E. | |
| 97. |
Liquid benzene having CP = 29 J/°C, is heated from 5°C to 10°C, what is the enthalpy change? |
| A. | 29 J |
| B. | 145 J |
| C. | 195 J |
| D. | 290 J |
| Answer» C. 195 J | |
| 98. |
A mixture contains 20% O₂ with CP = 10 J/°C, 30% N₂ with CP = 20 J/°C and 50% CO₂ with CP= 40 J/°C, what is the average CP of mixture? |
| A. | 20 J/°C |
| B. | 28 J/°C |
| C. | 34 J/°C |
| D. | 42 J/°C |
| Answer» C. 34 J/°C | |
| 99. |
What is the heat of reaction if enthalpy of inputs and outputs at 25°C are 10 J and 8 J, the enthalpy of input and outputs at given temperature are 5 J and 20 J, enthalpy change of reaction is 30 J? |
| A. | 13 J |
| B. | 22 J |
| C. | 28 J |
| D. | 35 J |
| Answer» B. 22 J | |
| 100. |
Three feeds, 10 mole with H = 25 J/mole, 5 mole with H = 10 J/mole and 15 mole with 20 J/mole, what is the enthalpy of the products? |
| A. | 10 J/mole |
| B. | 12 J/mole |
| C. | 20 J/mole |
| D. | 28 J/mole |
| Answer» D. 28 J/mole | |