MCQOPTIONS
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MCQOPTIONS
This section includes 11 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. |
The important design and operating considerations for Extended-Surface Compact Heat Exchangers are:(1) Both fluids may have high or low heat transfer coefficients(2) As the tubes are very narrow (low DH), the fluid used should not be corrosive as effective cleaning of tubes is not possible.(3) The fluid pressure drop calculation is important as a regulatory method to ensure long life of the tubes.(4) Unlike shell and tube type heat exchangers, these are limited when it comes to operating pressure and temperature. |
| A. | (1), (2), (3), (4) |
| B. | (1), (4) |
| C. | (2), (3), (4) |
| D. | (1), (2) |
| Answer» D. (1), (2) | |
| 2. |
Recognize the following Baffle. |
| A. | Triple Segmental Baffles |
| B. | Double Segmental Baffles |
| C. | Single Segmental Baffles |
| D. | Quadruple Segmental Baffles |
| Answer» B. Double Segmental Baffles | |
| 3. |
The three most common types of shell-and-tube exchangers are:(1) fixed tubesheet design.(2) U-tube design.(3) floating-head type.(4) Regenerator Type. |
| A. | (1),(3),(4) |
| B. | (2),(3),(4) |
| C. | (1),(2),(3) |
| D. | (1),(2),(4) |
| Answer» D. (1),(2),(4) | |
| 4. |
What is the meaning of 1⁄2” OD, 5 BWG? |
| A. | Wall Thickness of = 0.203″ and Inner Diameter = 0.094″ |
| B. | Wall Thickness of = 0.022″ and Inner Diameter = 0.478″ |
| C. | Wall Thickness of = 0.220″ and Inner Diameter = 0.060″ |
| D. | Wall Thickness of = 0.025″ and Inner Diameter = 0.450″ |
| Answer» D. Wall Thickness of = 0.025″ and Inner Diameter = 0.450″ | |
| 5. |
The Hydraulic Diameter (DH) is defined as _____AO : is the minimum free-flow area on one fluid side of a heat exchanger.P : is the wetted perimeter of flow passages of that side. |
| A. | \(\frac{4A_o}{P}\) |
| B. | \(\frac{A_o}{4P}\) |
| C. | \(\frac{A_o}{P}\) |
| D. | \(\frac{8A_o}{P}\) |
| Answer» B. \(\frac{A_o}{4P}\) | |
| 6. |
Which of the following is not a characteristic of a Direct-Contact Exchanger? |
| A. | Only heat Transfer occurs without any Mass -Transfer |
| B. | The Exchanger Construction is relatively not expensive |
| C. | The fouling problem does not generally exist, due to the absence of a separating wall (heat transfer surface) between the two fluids |
| D. | Very high heat transfer rates are achievable |
| E. | between the two fluidsd) Very high heat transfer rates are achievable |
| Answer» B. The Exchanger Construction is relatively not expensive | |
| 7. |
A gas-to-fluid exchanger can be referred to as a compact heat exchanger if it has a Hydraulic Diameter, DH _____ |
| A. | ≤ 6 mm |
| B. | ≤ 12 mm |
| C. | ≥ 6 mm |
| D. | ≥ 3 mm |
| Answer» B. ≤ 12 mm | |
| 8. |
In a Fluidised Bed Heat Exchanger with hot gas flow, at fluidisation the temperature of the bed is ________ |
| A. | Linearly Increasing |
| B. | Uniform |
| C. | Linearly Decreasing |
| D. | Decreasing but not Linear |
| Answer» C. Linearly Decreasing | |
| 9. |
In a ___________ heat exchanger, both fluids flow alternatively through the same flow passages, and hence heat transfer is intermittent. |
| A. | Shell and Tube |
| B. | Fluidised Bed |
| C. | Storage Type |
| D. | Cross Flow Type |
| Answer» D. Cross Flow Type | |
| 10. |
Which of the following is not a classification based on Construction of the heat Exchanger? |
| A. | Tubular |
| B. | Plate Type |
| C. | Multipass |
| D. | Regenerative |
| Answer» D. Regenerative | |
| 11. |
Which of the following is not an Indirect Contact type heat exchanger? |
| A. | Shell and Tube |
| B. | Feedwater Heater |
| C. | Spray and Tray type |
| D. | Plate Type |
| Answer» D. Plate Type | |