MCQOPTIONS
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MCQOPTIONS
This section includes 6 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. |
Cavitation is more pronounced in rough pipes than smooth surfaced pipes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
For liquid fluids will capillarity rise (or fall) increase or decrease with rise in temperature. |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | First decrease then increase |
| Answer» C. Remain constant | |
| 3. |
Capillarity fall is reduced if we take the appartus (capillary tube immersed in fluid having acute angle of contact) considerable distance inside the earth( i.e below the earth crust). |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The surface tension of fluid in contact with air at 25 is 0.51N/m. The pressure inside a droplet is to be 0.05 N/cm2 greater than outside pressure. Determine the diameter of the droplet of water. |
| A. | 4.08mm |
| B. | 8.16mm |
| C. | 2.04mm |
| D. | None of the mentioned |
| Answer» B. 8.16mm | |
| 5. |
Find the capillarity rise or fall if a capillary tube of diameter .03m is immersed in hypothetical fluid with specific gravity 6.5, surface tension 0.25 N/m and angle of contact 147 . |
| A. | 0.44mm fall |
| B. | 0.88mm fall |
| C. | 0.44mm rise |
| D. | 0.88mm rise |
| Answer» B. 0.88mm fall | |
| 6. |
Calculate the magnitude of capillary effect in millimeters in a glass tube of 7mm diameter, when immersed in mercury. The temperature of the liquid is 25 and the values of surface tension of mercury at 25 is 0.51 N/m. The angle of contact for mercury is 130 . |
| A. | 140 |
| B. | 280 |
| C. | 170 |
| D. | 210 |
| Answer» B. 280 | |