MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
A large tank of height h is half-filled with a liquid of density ρ and other half-filled with a liquid of density 4ρ. A similar tank is half-filled with a liquid of density 2ρ and other-half filled with another liquid of density 3ρ as shown. What will be the ratio of the instantaneous velocities of discharge through a small opening at the base of the tanks? (assume that the diameter of the opening is negligible compared to the height of the liquid column in either of the tanks) |
| A. | 1 : 1 |
| B. | 1 : 2 |
| C. | 2 : 1 |
| D. | 1 : 3 |
| Answer» B. 1 : 2 | |
| 2. |
A large tank of height h is filled with a liquid of density ρ. A similar tank is half-filled with this liquid and other-halffilled with another liquid of density 2ρ as shown. What will be the ratio of the instantaneous velocities of discharge through a small opening at the base of the tanks? (assume that the diameter of the opening is negligible compared to the height of the liquid column in either of the tanks) |
| A. | 2 : 3 |
| B. | 2 : √3 |
| C. | √2 : 3 |
| D. | √2 : √3 |
| Answer» E. | |
| 3. |
A gate of length 5 m is hinged at A as shown to support a water column of height 2.5 m. What should be the minimum mass per unit width of the gate to keep it closed? |
| A. | 3608 |
| B. | 4811 |
| C. | 7217 |
| D. | 9622 |
| Answer» E. | |
| 4. |
A container is lled with two liquids of densities ρ and 2ρ up to heights h and eh respectively. What will be the ratio of the depths of the centres of pressure of the upper face BC and the lower face AB? |
| A. | 1 : 2 |
| B. | 3 : 4 |
| C. | 2 : 3 |
| D. | 3 : 2 |
| Answer» D. 3 : 2 | |
| 5. |
A container is lled with two liquids of densities ρ and 2ρ up to heights h and eh respectively. What will be the ratio of the total pressure on the lower face AB and on the upper face BC? |
| A. | 1 : 1 |
| B. | 3 : 1 |
| C. | 2 : 1 |
| D. | 3 : 2 |
| Answer» C. 2 : 1 | |
| 6. |
A square lamina (each side equal to 2m) is submerged vertically in water such that the upper edge of the lamina is at a depth of 0.5 m from the water surface. If the pressure on the surface is 12 bar, what will be the total water pressure (in kN) on the lamina? |
| A. | 39 |
| B. | 59 |
| C. | 64 |
| D. | 71 |
| Answer» D. 71 | |
| 7. |
The highest and lowest vertices of a diagonal of a square lamina (each side equal to 4m) are 1 m and 3 m respectively as shown. What will be the depth (in m) of it’s centre of pressure? |
| A. | 1.08 |
| B. | 1.58 |
| C. | 2.08 |
| D. | 2.58 |
| Answer» D. 2.58 | |
| 8. |
The highest and lowest vertices of a diagonal of a square lamina (each side equal to 4m) are 1 m and 3 m respectively as shown. What will be the water force (in kN) on the lamina? |
| A. | 78 |
| B. | 118 |
| C. | 157 |
| D. | 196 |
| Answer» D. 196 | |
| 9. |
The greatest and the least depth of a circular plate of 4 m diameter from the free surface of water are 3m and 1 m respectively as shown. What will be the depth (in m) of it’s centre of pressure? |
| A. | 1.125 |
| B. | 1.25 |
| C. | 2.125 |
| D. | 2.25 |
| Answer» D. 2.25 | |
| 10. |
The greatest and the least depth of a circular plate of 4 m diameter from the free surface of water are 3m and 1 m respectively as shown. What will be the total pressure in (kN) on the plate? |
| A. | 123 |
| B. | 185 |
| C. | 246 |
| D. | 308 |
| Answer» D. 308 | |