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This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Graduate Aptitude Test (GATE) knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number) |
| A. | 1/RN |
| B. | 4/RN |
| C. | 16/RN |
| D. | 64/RN |
| Answer» D. 64/RN | |
| 2. |
In a venturimeter, the velocity of liquid at throat is __________ than at inlet. |
| A. | higher |
| B. | lower |
| Answer» B. lower | |
| 3. |
The maximum discharge over a broad crested weir is |
| A. | 0.384 Cd x L x H1/2 |
| B. | 0.384 Cd x L x H3/2 |
| C. | 1.71 Cd x L x H1/2 |
| D. | 1.71 Cd x L x H3/2 |
| Answer» E. | |
| 4. |
In order to measure the flow with a venturimeter, it is installed in |
| A. | horizontal line |
| B. | inclined line with flow upwards |
| C. | inclined line with flow downwards |
| D. | any direction and in any location |
| Answer» E. | |
| 5. |
Coefficient of resistance is the ratio of |
| A. | actual velocity of jet at vena contracta to the theoretical velocity |
| B. | area of jet at vena contracta to the area of orifice |
| C. | loss of head in the orifice to the head of water available at the exit of the orifice |
| D. | actual discharge through an orifice to the dieoretical discharge |
| Answer» D. actual discharge through an orifice to the dieoretical discharge | |
| 6. |
According to equation of continuity, |
| A. | w1a1 = w2a2 |
| B. | w1v1 = w2v2 |
| C. | a1v1 = a2v2 |
| D. | a1/v1 = a2/v2 |
| Answer» D. a1/v1 = a2/v2 | |
| 7. |
When a tube of smaller diameter is dipped in water, the water rises in the tube due to viscosity of water. |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
The Reynold's number of a ship is __________ to its velocity and length. |
| A. | directly proportional |
| B. | inversely proportional |
| Answer» B. inversely proportional | |
| 9. |
In a free nappe, |
| A. | the pressure below the nappe is atmospheric |
| B. | the pressure below the nappe is negative |
| C. | the pressure above the nappe is atmospheric |
| D. | the pressure above the nappe is negative |
| Answer» B. the pressure below the nappe is negative | |
| 10. |
Coefficient of contraction is the ratio of |
| A. | actual velocity of jet at vena contracta to the theoretical velocity |
| B. | loss of head in the orifice to the head of water available at the exit of the orifice |
| C. | actual discharge through an orifice to the theoretical discharge |
| D. | area of jet at vena contracta to the area of orifice |
| Answer» E. | |
| 11. |
An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch. |
| A. | 1% |
| B. | 1.5% |
| C. | 2% |
| D. | 2.5% |
| Answer» E. | |
| 12. |
A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. The total pressure on the wall per unit length is (where w = Specific weight of liquid, and H = Height of liquid) |
| A. | wH |
| B. | wH/2 |
| C. | wH2/2 |
| D. | wH2/3 |
| Answer» D. wH2/3 | |
| 13. |
A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. |
| A. | equal to. |
| B. | less than |
| C. | more than |
| Answer» D. | |
| 14. |
The kinematic viscosity is the |
| A. | ratio of absolute viscosity to the density of the liquid |
| B. | ratio of density of the liquid to the absolute viscosity |
| C. | product of absolute viscosity and density of the liquid |
| D. | product of absolute viscosity and mass of the liquid |
| Answer» B. ratio of density of the liquid to the absolute viscosity | |
| 15. |
In one dimensional flow, the flow |
| A. | is steady and uniform |
| B. | takes place in straight line |
| C. | takes place in curve |
| D. | takes place in one direction |
| Answer» C. takes place in curve | |
| 16. |
In a depressed nappe |
| A. | the pressure below the nappe is atmospheric |
| B. | the pressure below the nappe is negative |
| C. | the pressure above the nappe is atmospheric |
| D. | the pressure above the nappe is negative |
| Answer» C. the pressure above the nappe is atmospheric | |
| 17. |
The value of bulk modulus of a fluid is required to determine |
| A. | Reynolds number |
| B. | Froudes number |
| C. | Mach number |
| D. | Eulers number |
| Answer» D. Eulers number | |
| 18. |
One litre of water occupies a volume of |
| A. | 100 cm3 |
| B. | 250 cm3 |
| C. | 500 cm3 |
| D. | 1000 cm3 |
| Answer» E. | |