| 46. | The pitot static tube does not measure the __________ pressure. |
| a. | static |
| b. | total |
| c. | difference in static & dynamic |
| d. | all (a), (b) and (c) |
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Answer: (d).all (a), (b) and (c)
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| 47. | The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a __________ fluid. |
| a. | Bingham |
| b. | Newtonion |
| c. | perfect |
| d. | none of these |
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Answer: (b).Newtonion
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| 48. | In fluid flow, cavitation is caused, if the |
| a. | fluid velocity decreases to zero. |
| b. | total energy decreases. |
| c. | both (a) and (b). |
| d. | flow pressure approaches its vapor pressure at the prevailing temperature. |
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Answer: (d).flow pressure approaches its vapor pressure at the prevailing temperature.
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| 49. | The ratio of the depth of flow to the hydraulic radius for the most economical trapezoidal section, in open channel flow is |
| a. | 0.5 |
| b. | 1 |
| c. | 1.5 |
| d. | 2 |
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Answer: (d).2
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| 50. | Which of the following denotes the effect of compressibility in fluid flow ? |
| a. | Weber number |
| b. | Mach number |
| c. | Euler number |
| d. | Reynolds number |
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Answer: (b).Mach number
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