MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Fluid Mechanics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The absolute pressure of a water is 0.5kN above it’s vapor pressure. If it flows with a velocity of 1m/s, what will be the value of Cavitation Number describing the flow induced boiling? |
| A. | 0.25 |
| B. | 0.5 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |
| 2. |
Which of the following equation correctly depicts the relation between the vapor pressure of a liquid and it’s temperature? |
| A. | Vapor pressure increases linearly with the increase in temperature of the liquid |
| B. | Vapor pressure increases slightly with the increase in temperature of the liquid at low temperatures and the rate of increase goes high at higher temperatures |
| C. | Vapor pressure increases rapidly with the increase in temperature of the liquid at low temperatures and the rate of increase goes low at higher temperatures |
| D. | Vapor pressure remains unchanged with the increase in temperature of the liquid |
| Answer» C. Vapor pressure increases rapidly with the increase in temperature of the liquid at low temperatures and the rate of increase goes low at higher temperatures | |
| 3. |
Which of the following is correct regarding the formation and collapse of vapor bubbles in a liquid? |
| A. | Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes above the bubble pressure |
| B. | Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes below the bubble pressure |
| C. | Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes below the bubble pressure |
| D. | Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes above the bubble pressure |
| Answer» E. | |
| 4. |
The absolute pressure of a water is 0.5kN above it’s vapor pressure. If it flows with a velocity of 1m/s, what will be the value of Cavitation Number describing the flow induced boiling?$ |
| A. | 0.25 |
| B. | 0.5 |
| C. | 1 |
| D. | 2 |
| Answer» D. 2 | |
| 5. |
Equal amount of a particular liquid is poured into three similar containers, namely 1, 2 and 3, at a temperature of T1, T2 and T3 respectively. If T1 < T2 < T3, the liquid in which container will have the highest vapor pressure? |
| A. | container 1 |
| B. | container 2 |
| C. | container 3 |
| D. | the vapor pressure of the liquid will remain the same irrespective of it’s temperature |
| Answer» D. the vapor pressure of the liquid will remain the same irrespective of it‚Äö√Ñ√∂‚àö√ë‚àö¬•s temperature | |
| 6. |
The three liquids 1, 2, and 3 with vapor pressures V1, V2 and V3 respectively, are kept under same pressure. If V1 > V2 > V3, which liquid will start boiling early? |
| A. | liquid 1 |
| B. | liquid 2 |
| C. | liquid 3 |
| D. | they will start boiling at the same time |
| Answer» B. liquid 2 | |
| 7. |
Which of the following machines have the possibility of cavitation? |
| A. | Reaction turbines and centrifugal pumps |
| B. | Reaction turbines and reciprocating pumps |
| C. | Impulse turbines and centrifugal pumps |
| D. | Impulse turbines and reciprocating pumps |
| Answer» B. Reaction turbines and reciprocating pumps | |
| 8. |
Which of the following is the condition for the boiling of a liquid? |
| A. | Absolute pressure of a liquid must be greater than or equal to it’s vapor pressure |
| B. | Absolute pressure of a liquid must be less than or equal to it’s vapor pressure |
| C. | Absolute pressure of a liquid must be equal to it’s vapor pressure |
| D. | Absolute pressure of a liquid must be greater than it’s vapor pressure |
| Answer» C. Absolute pressure of a liquid must be equal to it‚Äö√Ñ√∂‚àö√ë‚àö¬•s vapor pressure | |
| 9. |
Which of the following equation correctly depicts the relation between the vapor pressure of a liquid and it’s temperature?$ |
| A. | Vapor pressure increases linearly with the increase in temperature of the liquid |
| B. | Vapor pressure increases slightly with the increase in temperature of the liquid at low temperatures and the rate of increase goes high at higher temperatures |
| C. | Vapor pressure increases rapidly with the increase in temperature of the liquid at low temperatures and the rate of increase goes low at higher temperatures |
| D. | Vapor pressure remains unchanged with the increase in temperature of the liquid |
| Answer» C. Vapor pressure increases rapidly with the increase in temperature of the liquid at low temperatures and the rate of increase goes low at higher temperatures | |
| 10. |
Which of the following statement is true about vapor pressure of a liquid? |
| A. | Vapor pressure is closely related to molecular activity and temperature of the liquid |
| B. | Vapor pressure is closely related to molecular activity but independent of the temperature of the liquid |
| C. | Vapor pressure is not affected by molecular activity and temperature of the liquid |
| D. | Vapor pressure is not affected by molecular activity and is independent of the temperature of the liquid |
| Answer» B. Vapor pressure is closely related to molecular activity but independent of the temperature of the liquid | |