MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A counter flow heat exchanger is used to col 2000 kg/hr of oil (c p = 2.5 k J/kg K) from 105 degree Celsius to 30 degree Celsius by the use of water entering at 15 degree Celsius. If the overall heat transfer coefficient is expected to be 1.5 k W/m2 K, find out the water flow rate. Presume that the exit temperature of the water is not to exceed 80 degree Celsius |
| A. | 1680.2 kg/hr |
| B. | 1580.2 kg/hr |
| C. | 1480.2 kg/hr |
| D. | 1380.2 kg/hr |
| Answer» E. | |
| 2. |
Consider the above problem, make calculations for maximum possible effectiveness if the fluid flow conforms to counter flow arrangement |
| A. | 1.23 |
| B. | 0.5 |
| C. | 1 |
| D. | 0.465 |
| Answer» D. 0.465 | |
| 3. |
What is the maximum efficiency for parallel flow heat exchanger? |
| A. | 5% |
| B. | 10% |
| C. | 20% |
| D. | 50% |
| Answer» B. 10% | |
| 4. |
In a gas turbine recuperator, the expression for effectiveness for the parallel flow configuration reduces to |
| A. | 1 exponential (- NTU)/3 |
| B. | 1 exponential (- NTU)/4 |
| C. | 1 exponential (- 2 NTU)/2 |
| D. | 1 exponential (- NTU)/6 |
| Answer» D. 1 exponential (- NTU)/6 | |
| 5. |
In a gas turbine recuperator, the capacity ratio becomes |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» C. 4 | |
| 6. |
Identify the correct expression for effectiveness |
| A. | 4 exponential (- NTU) |
| B. | 3 exponential (- NTU) |
| C. | 2 exponential (- NTU) |
| D. | 1 exponential (- NTU) |
| Answer» E. | |
| 7. |
How many fluids remain at a constant temperature during the process of boiling and condensation? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |