MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
In pressure velocity compounding, the total drop in steam pressure is divided into stages and velocity obtained in each stage is also compounded. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Identify the incorrect statement about blades. |
| A. | Fixed profile type blade redirects the steam |
| B. | Steam pressure is dropped in moving as well as fixed aerofoil type blades |
| C. | Fixed aerofoil type blades act as nozzles |
| D. | Steam pressure us dropped in moving profile type blades |
| Answer» E. | |
| 3. |
In a condensing steam turbine the pressure of the steam leaving the turbine should be equal to _____ |
| A. | inlet pressure |
| B. | condenser pressure |
| C. | atmospheric pressure |
| D. | boiler pressure |
| Answer» C. atmospheric pressure | |
| 4. |
Which of the following turbines has the least efficiency? |
| A. | Curtis and Moore turbine |
| B. | Rateau and Zoelly turbine |
| C. | De laval turbine |
| D. | Curtis turbine |
| Answer» D. Curtis turbine | |
| 5. |
Identify the incorrect statement regarding impulse turbine. |
| A. | Blade manufacturing of reaction turbine is difficult than that of impulse turbine |
| B. | Impulse turbine makes use of profile type blades whereas reaction turbine uses aerofoil type |
| C. | Pressure drop occurs in only nozzles in impulse turbines but also occurs in moving blades reaction turbine |
| D. | Impulse turbine can generate more power than impulse turbine |
| Answer» E. | |
| 6. |
Pressure velocity compounding is used in _____ |
| A. | Rateau and Zoelly turbine |
| B. | Curtis and Moore turbine |
| C. | De laval turbine |
| D. | Curtis turbine |
| Answer» C. De laval turbine | |
| 7. |
Which of the following turbines do not resort to any method of rotor speed? |
| A. | De laval turbine |
| B. | Curtis turbine |
| C. | Rateau and Zoelly turbine |
| D. | Curtis and Moore turbine |
| Answer» B. Curtis turbine | |
| 8. |
Which of the following turbine uses pressure compounding method for reduction of rotor speed? |
| A. | Curtis turbine |
| B. | Rateau and Zoelly turbine |
| C. | Curtis and Moore turbine |
| D. | De laval turbine |
| Answer» C. Curtis and Moore turbine | |
| 9. |
Which of the following statements is FALSE about pressure compounding? |
| A. | Steam pressure is reduced when steam moves over the moving blade |
| B. | Multiple set of nozzles is used |
| C. | Rotor speed is not very high |
| D. | Steam expansion takes place in steps |
| Answer» B. Multiple set of nozzles is used | |
| 10. |
Which of the following statements is FALSE about velocity compounding? |
| A. | Steam is expanded through only one set of nozzles |
| B. | Low cost and high efficiency |
| C. | The kinetic energy of the steam is absorbed in stages |
| D. | The fixed blades re-direct the direction of velocity |
| Answer» C. The kinetic energy of the steam is absorbed in stages | |
| 11. |
Which of the following statements about multi-stage reaction turbine is FALSE? |
| A. | Pressure drop takes place gradually over the fixed blades |
| B. | Fixed blades act as nozzles |
| C. | Moving blades absorb kinetic energy of the steam |
| D. | Pressure is not altered while the steam is moving over the moving blades |
| Answer» E. | |
| 12. |
The wheel or rotor speed in case of De laval turbine is low as only one ring of moving blade absorbs the kinetic energy of the steam. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Which of the following statements about De laval turbine is FALSE? |
| A. | It has only one set of nozzles |
| B. | Impulse blades are attached to the rotors |
| C. | It has multiple rings of moving blades |
| D. | Exit velocity of steam is very high |
| Answer» D. Exit velocity of steam is very high | |
| 14. |
In steam turbine terminology, the loss of energy due to higher exit velocity of steam is called _____ |
| A. | velocity loss |
| B. | energy loss |
| C. | kinetic loss |
| D. | carry over loss |
| Answer» E. | |
| 15. |
How many set of nozzles are there in a simple impulse turbine? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» B. two | |