McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 1. |
When the Mach number is less than unity, the flow is called |
| A. | Sub-sonic flow |
| B. | Sonic flow |
| C. | Super-sonic flow |
| D. | Hyper-sonic flow |
| Answer» A. Sub-sonic flow | |
| 2. |
The product of mass and acceleration of flowing liquid is called |
| A. | Inertia force |
| B. | Viscous force |
| C. | Gravity force |
| D. | Pressure force |
| Answer» A. Inertia force | |
| 3. |
Ratio of inertia force to elastic force is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynolds number |
| D. | Weber's number |
| Answer» A. Mach number | |
| 4. |
Euler's number is the ratio of __________ force to pressure force. |
| A. | Inertia |
| B. | Gravity |
| C. | Viscous |
| D. | None of these |
| Answer» A. Inertia | |
| 5. |
Ratio of inertia force to surface tension is known as |
| A. | Mach number |
| B. | Froude number |
| C. | Reynolds’s number |
| D. | Weber's number |
| Answer» D. Weber's number | |
| 6. |
The force present in a moving liquid is |
| A. | Inertia force |
| B. | Viscous force |
| C. | Gravity force |
| D. | All of these |
| Answer» D. All of these | |
| 7. |
A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water? |
| A. | 10 m/sec |
| B. | 25 m/sec |
| C. | 2 m/sec |
| D. | 50 m/sec |
| Answer» C. 2 m/sec | |
| 8. |
When the Mach number is more than 6, the flow is called |
| A. | Sub-sonic flow |
| B. | Sonic flow |
| C. | Super-sonic flow |
| D. | Hyper-sonic flow |
| Answer» D. Hyper-sonic flow | |
| 9. |
The ratio of the inertia force to the viscous force is called |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Weber's number |
| D. | Euler's number |
| Answer» A. Reynold's number | |
| 10. |
Reynold's number is the ratio of the inertia force to the |
| A. | Surface tension force |
| B. | Viscous force |
| C. | Gravity force |
| D. | Elastic force |
| Answer» B. Viscous force | |
| 11. |
Froude number is significant in |
| A. | Supersonics, as with projectile and jet propulsion |
| B. | Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. |
| C. | Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls |
| D. | All of the above |
| Answer» C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls | |
| 12. |
Reynold's number is the ratio of inertia force to |
| A. | Pressure force |
| B. | Elastic force |
| C. | Gravity force |
| D. | Viscous force |
| Answer» D. Viscous force | |
| 13. |
Principle of similitude forms the basis of |
| A. | Comparing two identical equipments |
| B. | Designing models so that the result can be converted to prototypes |
| C. | Comparing similarity between design and actual equipment |
| D. | Hydraulic designs |
| Answer» B. Designing models so that the result can be converted to prototypes | |
| 14. |
Select the correct statement |
| A. | Weber's number is the ratio of inertia force to elastic force |
| B. | Weber's number is the ratio of gravity force to surface tension force |
| C. | Weber's number is the ratio of viscous force to pressure force |
| D. | Weber's number is the ratio of inertia force to surface tension force |
| Answer» D. Weber's number is the ratio of inertia force to surface tension force | |
| 15. |
For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal |
| A. | Ratio of inertial force to force due to viscosity |
| B. | Ratio of inertial force to force due to gravitation |
| C. | Ratio of inertial force to force due to surface tension |
| D. | All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity |
| Answer» D. All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity | |
| 16. |
The ratio of the inertia force to the __________ is called Euler's number. |
| A. | Pressure force |
| B. | Elastic force |
| C. | Surface tension force |
| D. | Viscous force |
| Answer» A. Pressure force | |
| 17. |
Dimensions of surface tension are |
| A. | ML°T⁻² |
| B. | ML°T |
| C. | ML r² |
| D. | ML²T² |
| Answer» A. ML°T⁻² | |
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