McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
Chapters
| 1. |
The condensation of steam in a condenser takes place at |
| A. | constant pressure |
| B. | constant temperature |
| C. | constant pressure and constant temperature |
| D. | none of the above |
| Answer» C. constant pressure and constant temperature | |
| 2. |
During condensation process, the temperature of the condensing fluid |
| A. | remains constant |
| B. | decreases |
| C. | increases |
| D. | none of the above |
| Answer» A. remains constant | |
| 3. |
The function of a condenser in a steam power plant is |
| A. | to reduce back pressure |
| B. | to condense the exhaust steam |
| C. | to reduce specific volume of fluid |
| D. | all of the above |
| Answer» D. all of the above | |
| 4. |
In a high-level jet condenser, the condenser shell is installed at a height of |
| A. | more than 5.5 m |
| B. | more than 10.33 m |
| C. | less than 10.33 m |
| D. | none of the above |
| Answer» B. more than 10.33 m | |
| 5. |
The surface condensers are preferred in steam power plant, because |
| A. | they require less coolant |
| B. | condensate can be reused |
| C. | they are more efficient |
| D. | none of the above |
| Answer» B. condensate can be reused | |
| 6. |
In evaporative condensers, the condensing of steam is achieved |
| A. | by rejecting heat to surrounding air |
| B. | by rejecting heat to coolant |
| C. | by evaporation of some coolant |
| D. | none of the above |
| Answer» C. by evaporation of some coolant | |
| 7. |
Dalton's law of partial pressure, applicable to condensers, states that |
| A. | Pa = Pabs + Psat |
| B. | Psat = Pabs + Pa |
| C. | Pabs = Pa+ Psat |
| D. | none of the above |
| Answer» C. Pabs = Pa+ Psat | |
| 8. |
The absolute pressure in a condenser is given by |
| A. | Pabs = Patm + Pvacuum |
| B. | Pabs = Patm -Pvacuum |
| C. | Pabs = Pvacuum |
| D. | none of the above |
| Answer» B. Pabs = Patm -Pvacuum | |
| 9. |
Air leakage into the condenser reduces |
| A. | turbine output |
| B. | cooling capacity |
| C. | life of condenser |
| D. | all of the above |
| Answer» D. all of the above | |
| 10. |
The vacuum maintained in a condenser depends on |
| A. | pressure of cooling water |
| B. | temperature of cooling water |
| C. | back pressure maintained in the condenser |
| D. | all of the above |
| Answer» B. temperature of cooling water | |
| 11. |
The function of a condenser in a thermal power plant is....... |
| A. | To act as reservior to receive steam for turbine |
| B. | To condense steam into condensate to be reused again |
| C. | To create vaccum |
| D. | All of the above |
| Answer» D. All of the above | |
| 12. |
A condenser where circulating water flows through tubes which are surrounded by steam,is known as......... |
| A. | Surface condenser |
| B. | Jet condenser |
| C. | Barometric condenser |
| D. | Evaporative condenser |
| Answer» A. Surface condenser | |
| 13. |
The vaccum obtainable in a condenser is dependent upon...... |
| A. | Capacity of ejector |
| B. | Quantity of steam to be handeled |
| C. | Types of condenser used |
| D. | Temperature of cooling water |
| Answer» D. Temperature of cooling water | |
| 14. |
The ratio of actual vaccum to the ideal vaccum in a condenser is called....... |
| A. | Condenser efficiency |
| B. | Vaccum efficiency |
| C. | Boiler efficiency |
| D. | Nozzle efficiency |
| Answer» B. Vaccum efficiency | |
| 15. |
A condenser in a steam power plant is ....... |
| A. | Increases expansion ratio of steam |
| B. | Reduces back pressure of steam |
| C. | Reduces temperature of exhaust steam |
| D. | All of the above |
| Answer» D. All of the above | |
| 16. |
The actual vaccum in a condenser is equal to...... |
| A. | Barometric pressure + actual pressure |
| B. | Barometric pressure - actual pressure |
| C. | Gauge pressure + atmospheric pressure |
| D. | Gauge pressure - atmospheric pressure |
| Answer» B. Barometric pressure - actual pressure | |
| 17. |
According to Dalton’s law, the total pressure of the mixture of gases is equal to |
| A. | greater of the partial pressures of all |
| B. | average of the partial pressures of all |
| C. | sum of the partial pressures of all |
| D. | sum of the partial pressures of all divided by average molecular weight |
| Answer» C. sum of the partial pressures of all | |
| 18. |
At ideal condition of vapour power cycle, reversible constant pressure heat rejection is carried out at |
| A. | boiler |
| B. | turbine |
| C. | condenser |
| D. | feed pump |
| Answer» C. condenser | |
| 19. |
A condenser condenses the steam coming out from___________. |
| A. | Boiler |
| B. | Turbine |
| C. | Economiser |
| D. | Super heater |
| Answer» B. Turbine | |
| 20. |
What is use of the air pumps in the condenser? |
| A. | Remove water |
| B. | Air leaking in the condenser and to maintain the vacuum. |
| C. | Maintain atmospheric pressure and the condenser. |
| D. | Both (a) & (b). |
| Answer» B. Air leaking in the condenser and to maintain the vacuum. | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.