MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Thermal Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following statements about Velox boiler is FALSE? |
| A. | It starts quickly |
| B. | It is compact |
| C. | Combustion rates are low |
| D. | Pressurized air is used |
| Answer» D. Pressurized air is used | |
| 2. |
Which of the following statements about super-critical is TRUE? |
| A. | It only needs preheater and superheater |
| B. | It only needs economizer and preheater |
| C. | It only needs economizer and superheater |
| D. | It only needs preheater |
| Answer» B. It only needs economizer and preheater | |
| 3. |
Which of the following statements about Benson boiler is correct? |
| A. | It requires large surface area |
| B. | It is prone to explosions more than other boilers |
| C. | It takes a lot of time to start |
| D. | It is lighter than other boilers |
| Answer» E. | |
| 4. |
What is the maximum working pressure obtained by a commercial Benson boiler? |
| A. | 300 atm |
| B. | 400 atm |
| C. | 500 atm |
| D. | 600 atm |
| Answer» D. 600 atm | |
| 5. |
Which of the following statements is FALSE about Benson boiler? |
| A. | Bubble formation in the heating tubes is prevented by slow heating |
| B. | It is a forced circulation boiler |
| C. | Oil is used as fuel |
| D. | Feed water is compressed to 235 bar |
| Answer» B. It is a forced circulation boiler | |
| 6. |
The main drawback of LaMont boilers is _____ |
| A. | limited capacity of evaporating drum |
| B. | bubble formation on the inner surface of heating tubes |
| C. | hindrance in the flow of hot gases |
| D. | radiant superheater decreases the efficiency |
| Answer» C. hindrance in the flow of hot gases | |
| 7. |
In LaMont boilers, the circulation of water is maintained by a centrifugal pump which is driven by a steam turbine in which steam is fed from the boiler itself. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following is FALSE about high pressure boilers? |
| A. | They are compact |
| B. | Heat of combustion utilized more effectively |
| C. | Heat is saved by evaporating water below critical pressure |
| D. | Pumps are used to circulate water |
| Answer» D. Pumps are used to circulate water | |
| 9. |
Which of the following heating methods is NOT used in high pressure boilers? |
| A. | Evaporation of water above critical pressure of steam |
| B. | Decreasing gas velocity (improves heat transfer coefficient) |
| C. | Increasing water velocity inside tube (improves heat transfer coefficient) |
| D. | Mixing of water with superheated steam |
| Answer» C. Increasing water velocity inside tube (improves heat transfer coefficient) | |
| 10. |
Which of the following is NOT a unique feature of high pressure boiler? |
| A. | Water circulation method |
| B. | Tubing type |
| C. | Firing method |
| D. | Improved method of heating |
| Answer» D. Improved method of heating | |
| 11. |
Which of the following statements is FALSE about high pressure boilers? |
| A. | Modern high pressure boilers used for power generation have steam capacities even greater than 650 tonnes/hr |
| B. | Water is circulated through a pump in most of the modern high pressure boilers |
| C. | They are mostly water tube boilers |
| D. | One continuous tube is used for water circulation |
| Answer» E. | |
| 12. |
Shell boilers are preferred for high pressure and high output. |
| A. | True |
| B. | False |
| Answer» C. | |