MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Bioprocess Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
50 g benzaldehyde vapour is condensed at 179°C, What is the enthalpy of the liquid relative to the vapour?Given: The molecular weight of benzaldehyde is 106.12, the normal boiling point is 179.0°C and the standard heat of vaporization is 38.40 kJ gmol-1. For condensation the latent heat is – 38.40 kJ gmol-1. |
| A. | -18.09 kJ |
| B. | -17.09 kJ |
| C. | – 18.06 kJ |
| D. | – 17.06 kJ |
| Answer» B. -17.09 kJ | |
| 2. |
Processes for phase change of vapour to liquid is called? |
| A. | Vaporization |
| B. | Fusion |
| C. | Sublimation |
| D. | Condensation |
| Answer» E. | |
| 3. |
What is the enthalpy of 130 g formic acid at 70°C and 1 atm relative to 25°C and 1 atm?Cp for formic acid in the temperature range of interest is 0.524 cal g-1 °C-1. |
| A. | 4.68 kcal |
| B. | 3.06 kcal |
| C. | 2.06 kcal |
| D. | 2.68 kcal |
| Answer» C. 2.06 kcal | |
| 4. |
Estimate the following properties of humid air at 41°C and 10% relative humidity:Absolute humidity = 0.0048 kg H2O/ kg DAWet-bulb temperature = 19°CHumid volume = 0.895 M3/ kg DADew point = 3°CSpecific enthalpy = 54.2 – 0.7 = 53.5 kJ/ kg DAWhat is the amount of water in 150 m3 of air at these conditions? |
| A. | 0.605 kg H2O |
| B. | 0.705 kg H2O |
| C. | 0.805 kg H2O |
| D. | 0.905 kg H2O |
| Answer» D. 0.905 kg H2O | |
| 5. |
Calculate ΔH for a process in which 2.0 mole of NaOH is dissolved in 400 mol H2O at 25C.(\(\Delta \hat{H}_{s}\) at r = 200, 25°C is – 42.26 kJ/ mol) |
| A. | –84.52 kJ |
| B. | -80.42 kJ |
| C. | –64.52 kJ |
| D. | –60. 42 kJ |
| Answer» B. -80.42 kJ | |
| 6. |
Calculate how much energy (kJ) is required to heat a bottle containing 300 mL of liquid water from room temperature (20 °C) to its normal boiling point (100 °C), while still remaining a liquid. |
| A. | 104.4 kJ |
| B. | 100.4 kJ |
| C. | 140.4 kJ |
| D. | 104.5 kJ |
| Answer» C. 140.4 kJ | |
| 7. |
Acetone (denoted as Ac) is partially condensed out of a gas stream containing 66.9 mole % acetone vapor and the balance nitrogen. Process specifications and material balance calculations lead to the flowchart shown below.The process operates at steady state. Calculate the required cooling rate.Reference states for acetone and nitrogen are-N2 (g, 25°C, 1 atm), Ac (l, 20°C, 5 atm) |
| A. | – 2390kW |
| B. | – 2320kW |
| C. | is partially condensed out of a gas stream containing 66.9 mole % acetone vapor and the balance nitrogen. Process specifications and material balance calculations lead to the flowchart shown below.The process operates at steady state. Calculate the required cooling rate.Reference states for acetone and nitrogen are-N2 (g, 25°C, 1 atm), Ac (l, 20°C, 5 atm)a) – 2390kWb) – 2320kWc) – 3560kW |
| D. | – 3570kW |
| Answer» C. is partially condensed out of a gas stream containing 66.9 mole % acetone vapor and the balance nitrogen. Process specifications and material balance calculations lead to the flowchart shown below.The process operates at steady state. Calculate the required cooling rate.Reference states for acetone and nitrogen are-N2 (g, 25°C, 1 atm), Ac (l, 20°C, 5 atm)a) – 2390kWb) – 2320kWc) – 3560kW | |
| 8. |
The symbol “Û” refers to? |
| A. | Amount |
| B. | Rate of enthalpy |
| C. | Molar flow rate |
| D. | Specific internal energy |
| Answer» E. | |
| 9. |
Heat transferred to raise or lower the temperature of a material is called Specific heat. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
WHAT_IS_THE_ENTHALPY_OF_130_G_FORMIC_ACID_AT_70¬¨ àûC_AND_1_ATM_RELATIVE_TO_25¬¨ àûC_AND_1_ATM??$# |
| A. | |
| B. | 4.68 kcal |
| C. | 3.06 kcal |
| Answer» B. 4.68 kcal | |
| 11. |
What term is used for Temperature measured by Thermometer? |
| A. | Wet- bulb temperature |
| B. | Dry- bulb temperature |
| C. | Dew point temperature |
| D. | Normal temperature |
| Answer» C. Dew point temperature | |
| 12. |
Calculate ΔH for a process in which 2.0 mole of NaOH is dissolved in 400 mol H2O at 25C.$ |
| A. | |
| B. | –84.52 kJ |
| C. | -80.42 kJ |
| D. | –64.52 kJ |
| Answer» D. ‚Äö√Ñ√∂‚àö√ë‚àö¬®64.52 kJ | |
| 13. |
Calculate how much energy (kJ) is required to heat a bottle containing 300 mL of liquid water from room temperature (20 °C) to its normal boiling point (100 °C), while still remaining a liquid.$ |
| A. | 104.4 kJ |
| B. | 100.4 kJ |
| C. | 140.4 kJ |
| D. | 104.5 kJ |
| Answer» C. 140.4 kJ | |
| 14. |
– 2390kW$ |
| A. | – 2320kW |
| B. | – 3560kW |
| C. | – 3570kW |
| Answer» B. ‚Äö√Ñ√∂‚àö√ë‚àö¬® 3560kW | |
| 15. |
The symbol “Û” refers to?$ |
| A. | Amount |
| B. | Rate of enthalpy |
| C. | Molar flow rate |
| D. | Specific internal energy |
| Answer» E. | |
| 16. |
“Heat transferred to raise or lower the temperature of a material is called Specific heat”. |
| A. | True |
| B. | False |
| Answer» C. | |