MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Fluid Mechanics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why can’t the density be assumed as constant for compressible fluids? |
| A. | It shows variation with temperature and pressure |
| B. | It remains constant with temperature and pressure |
| C. | It becomes almost constant at very high temperature |
| D. | None of the mentioned |
| Answer» B. It remains constant with temperature and pressure | |
| 2. |
Calculate the pressure of air at a height of 3500m from sea level where pressure and temperature of air are 10 N/cm2 and 25℃ respectively. The temperature lapse rate is given as 0.0065 ℃ /m. Take density of air at sea level equal to 1.2 kg/m3. |
| A. | 19.7 N/cm2 |
| B. | 9.85 N/cm2 |
| C. | 4.93 N/cm2 |
| D. | 6.24 N/cm2 |
| Answer» C. 4.93 N/cm2 | |
| 3. |
Calculate the pressure at a height of 6500m above the sea level if the atmospheric pressure is 10.145 N/cm2 and temperature is 25℃ assuming air is incompressible. Take density of air as 1.2 kg/m3. Neglect variation of g. |
| A. | 4.98 N/cm2 |
| B. | 2.49 N/cm2 |
| C. | 1.24 N/cm2 |
| D. | None of the mentioned |
| Answer» C. 1.24 N/cm2 | |
| 4. |
The barometric pressure at sea level is 760 mm of Mercury while that on a mountain top is 715 mm. If the density of air is assumed constant at 1.2 kg/m3 , what is the elevation of the mountain top? |
| A. | 510 m |
| B. | 1020 m |
| C. | 255 m |
| D. | 128 m |
| Answer» B. 1020 m | |