MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
What is the function of an air preheater? |
| A. | It increases the temperature of air before it enters the furnace |
| B. | It increases the temperature of hot gases before they are released into the atmosphere |
| C. | It reduces the temperature of hot gases before they are released into the atmosphere |
| D. | It improves the quality of steam by mixing it with hot air |
| Answer» B. It increases the temperature of hot gases before they are released into the atmosphere | |
| 2. |
Which of the following statements about vertical tube economiser (Green s economiser) is FALSE? |
| A. | It is used with boilers operating below 25 bars |
| B. | It is an integral type economiser |
| C. | The direction of flow of flue gases is opposite to that of water |
| D. | It consists of a blow-off cock for removal of sediments |
| Answer» C. The direction of flow of flue gases is opposite to that of water | |
| 3. |
What is the function of economizer? |
| A. | It is used to heat the feed water |
| B. | It is used to improve the quality of steam |
| C. | It is used to heat air being supplied for combustion |
| D. | It separates suspended water particles from steam |
| Answer» B. It is used to improve the quality of steam | |
| 4. |
Pumping efficiency of an injector is high. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
Which of the following is TRUE about an injector? |
| A. | It feeds water into the boiler |
| B. | Kinetic Energy of steam is utilized to increase velocity of feed water |
| C. | It is used where there isn t enough space to install feed pump |
| D. | It is ideal for high capacity high pressure boilers |
| Answer» E. | |
| 6. |
The rotating element of the rotary feed pump is called _____ |
| A. | impeller |
| B. | propeller |
| C. | armature |
| D. | propulsor |
| Answer» B. propeller | |
| 7. |
Which of the following statements about reciprocating feed pumps is FALSE? |
| A. | Water is discharged in alternate strokes in single acting pump |
| B. | Water is discharged in each stroke in double acting pump |
| C. | They are supplied steam from the boiler itself |
| D. | In double acting pump water us displaced by only one side of the piston |
| Answer» E. | |
| 8. |
Which of the following statements about feed pump is TRUE? |
| A. | It is used to deliver feed water to the boiler |
| B. | It is used to take out steam from the boiler |
| C. | It is a boiler mounting |
| D. | It delivers air to the combustion chamber |
| Answer» B. It is used to take out steam from the boiler | |
| 9. |
Boiler Accessories increase efficiency of the steam boilers. |
| A. | True |
| B. | False |
| Answer» B. False | |