MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 297 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Carmen-Kozney equation has been derived using which of the following equation? |
| A. | Cole brook white equation |
| B. | Bernoulli equation |
| C. | Darcy Weisbach equation |
| D. | Swamee jain equation |
| Answer» D. Swamee jain equation | |
| 2. |
The superficial velocity in a stratified bed is equal to __________ |
| A. | Terminal settling velocity |
| B. | Terminal settling velocity * porosity |
| C. | Terminal settling velocity * (porosity)2 |
| D. | Terminal settling velocity * (porosity)4.5 |
| Answer» E. | |
| 3. |
When does the particle become suspended in an expanded bed? |
| A. | When superficial velocity is greater than critical velocity |
| B. | When superficial velocity is less than critical velocity |
| C. | When superficial velocity is equal to critical velocity |
| D. | When superficial velocity is constant |
| Answer» D. When superficial velocity is constant | |
| 4. |
Rose equation is valid for beds in which voids are clear and unobstructed. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The value of Reynolds number R is 1.5. The coefficient of drag is? |
| A. | 8 |
| B. | 10 |
| C. | 12 |
| D. | 16 |
| Answer» E. | |
| 6. |
When the Reynolds number is greater than 1.9 but less than 500, the coefficient of drag CD is? |
| A. | CD = 24/R |
| B. | CD = R/24 |
| C. | CD = 18.5/R0.6 |
| D. | CD = R0.6/18.5 |
| Answer» D. CD = R0.6/18.5 | |
| 7. |
Which of the following is the expression of the Rose equation where symbols have their usual meanings? |
| A. | hf = f* (L/(s *d)) * ((1-e) /e3) * (v2/g) |
| B. | hf = f* (L/(s *d)) * ((1-e) /e3) * (v/g) |
| C. | hf = f* (L/(s *d)) * ((1-e) /e4) * (v2/g)d) hf = f* (L/(s * |
| D. | ) * ((1-e) /e3) * (v2/g)b) hf = f* (L/(s *d)) * ((1-e) /e3) * (v/g)c) hf = f* (L/(s *d)) * ((1-e) /e4) * (v2/g)d) hf = f* (L/(s *d)) * ((1- |
| E. | /e3) * (v2/g)b) hf = f* (L/(s *d)) * ((1-e) /e3) * (v/g)c) hf = f* (L/(s *d)) * ((1-e) /e4) * (v2/g)d) hf = f* (L/(s *d)) * ((1-e) /e2) * (v2/g) |
| Answer» B. hf = f* (L/(s *d)) * ((1-e) /e3) * (v/g) | |
| 8. |
Which of the following has the highest shape factor as stated by Carmen? |
| A. | Ottawa sand |
| B. | Pulverized coal |
| C. | Rounded coal |
| D. | Angular sand |
| Answer» B. Pulverized coal | |
| 9. |
The head loss through the bed of solids of the filter can be determined by __________ |
| A. | Carmen-Kozney equation |
| B. | Rose equation |
| C. | Carmen-Kozney and Rose equation |
| D. | Charles equation |
| Answer» D. Charles equation | |
| 10. |
For solving network problems of pipes, necessary condition is |
| A. | continuity equation |
| B. | energy equation |
| C. | Darcy-Weisbach equation |
| D. | all the above. |
| Answer» E. | |
| 11. |
The maximum vacuum created at the summit of a syphon is |
| A. | 2.7 m of water |
| B. | 7.4 m of water |
| C. | 5.5 m of water |
| D. | none. |
| Answer» C. 5.5 m of water | |
| 12. |
Specific weight of sea water is more than that of pure water because of |
| A. | dissolved air |
| B. | dissolved salts |
| C. | suspended matter |
| D. | all the above. |
| Answer» E. | |
| 13. |
Atmospheric pressure is equal to water column head of |
| A. | 9.81 m |
| B. | 5.0 m |
| C. | 10.30 m |
| D. | 7.5 m. |
| Answer» D. 7.5 m. | |
| 14. |
The magnitude of water hammer in a pipe depends upon |
| A. | speed at which value is closed |
| B. | length of the pipe line |
| C. | elastic properties of the pipe material |
| D. | all the above. |
| Answer» E. | |
| 15. |
Equation of continuity of fluids is applicable only if |
| A. | flow is steady |
| B. | flow is compressive |
| C. | flow is one dimensional |
| D. | all the above. |
| Answer» E. | |
| 16. |
For critical flow, the Froude number is : |
| A. | 1.0 |
| B. | less than 1.0 |
| C. | more than 1.0 |
| D. | 2 |
| Answer» B. less than 1.0 | |
| 17. |
A water tank partially filled with water is being carried on a truck moving with a constant horizontal acceleration. The level of the water |
| A. | rises on the front side of the tank |
| B. | falls on the back side of the tank |
| C. | remains the same at both sides of the tank |
| D. | rises on the back side and falls on the front side |
| Answer» E. | |
| 18. |
If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing |
| A. | Reynold number |
| B. | Froude number |
| C. | Weber number |
| D. | Mach number. |
| Answer» C. Weber number | |
| 19. |
Energy equation is usually applicable to |
| A. | non-uniform flow |
| B. | turbulent flow |
| C. | laminar flow |
| D. | steady flow. |
| Answer» E. | |
| 20. |
An orifice is called a large orifice if water head, is |
| A. | twice the diameter of the orifice |
| B. | thrice the diameter of the orifice |
| C. | four times the diameter of the orifice |
| D. | five times the diameter of the orifice. |
| Answer» E. | |
| 21. |
For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is |
| A. | 6 m/sec |
| B. | 8 m/sec |
| C. | 10 m/sec |
| D. | 12 m/sec |
| Answer» D. 12 m/sec | |
| 22. |
Hydrostatic pressure on a dam depends upon its |
| A. | length |
| B. | depth |
| C. | shape |
| D. | both (b) and (c). |
| Answer» E. | |
| 23. |
In steady flow, which one of the following changes with time |
| A. | velocity |
| B. | pressure |
| C. | density |
| D. | none of these. |
| Answer» E. | |
| 24. |
The flow in open channel is laminar if the Reynold number is |
| A. | less than 500 |
| B. | more than 500 |
| C. | 1000 |
| D. | none of these. |
| Answer» B. more than 500 | |
| 25. |
Discharge over an ogee weir remains the same as that of |
| A. | sharp crested weir |
| B. | triangular weir |
| C. | cippoletti weir |
| D. | drowned weir. |
| Answer» D. drowned weir. | |
| 26. |
When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as |
| A. | free nappe |
| B. | depressed nappe |
| C. | clinging nappe |
| D. | none of these. |
| Answer» D. none of these. | |
| 27. |
A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is |
| A. | less than 12.2 m of the water |
| B. | more than 12.2 m of the water |
| C. | equal of 12.2 m of water |
| D. | none of these. |
| Answer» C. equal of 12.2 m of water | |
| 28. |
Chezy's formula is used to determine |
| A. | head loss due to friction in pipe |
| B. | velocity of flow in pipe |
| C. | velocity of flow in open channels |
| D. | none of these. |
| Answer» D. none of these. | |
| 29. |
Manometers are used to measure |
| A. | pressure in water channels, pipes etc. |
| B. | difference in pressure at two points |
| C. | atmospheric pressure |
| D. | very low pressure. |
| Answer» B. difference in pressure at two points | |
| 30. |
An independent mass of a fluid does not posses |
| A. | elevation energy |
| B. | kinetic energy |
| C. | pressure energy |
| D. | none of these. |
| Answer» D. none of these. | |
| 31. |
The instrument used for measuring the velocity of flow, is known as |
| A. | venturimeter |
| B. | orifice meter |
| C. | pitot tube |
| D. | none of these. |
| Answer» D. none of these. | |
| 32. |
A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is |
| A. | 15 m |
| B. | 20 m |
| C. | 30 m |
| D. | 40 m |
| Answer» E. | |
| 33. |
Centre of buoyancy is |
| A. | centroid of the floating body |
| B. | centroid of the fluid displaced |
| C. | centre of pressure of the displaced liquid |
| D. | none of these. |
| Answer» C. centre of pressure of the displaced liquid | |
| 34. |
A stepped notch is a combination of |
| A. | rectangular notches of different sizes |
| B. | triangular notches of different sizes |
| C. | rectangular and triangular notches |
| D. | all the above. |
| Answer» B. triangular notches of different sizes | |
| 35. |
One metric slug is equal to |
| A. | 1 kg wt |
| B. | 9.81 kg wt |
| C. | 9.81 kg mass |
| D. | 0.98 kg wt. |
| Answer» D. 0.98 kg wt. | |
| 36. |
An orifice is an opening in a vessel with |
| A. | closed perimeter of regular shape through which water flows |
| B. | the water level of the liquid on the up stream side is below the top of the orifice |
| C. | partially full flow |
| D. | prolonged sides having length of 2 to 3 diameters of the opening in thick wall. |
| Answer» B. the water level of the liquid on the up stream side is below the top of the orifice | |
| 37. |
When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure |
| A. | increases linearly to its radial distance |
| B. | varies inversely as the altitude along any vertical line |
| C. | varies as the square of the radial distance |
| D. | decreases as the square of the radial distance |
| Answer» D. decreases as the square of the radial distance | |
| 38. |
The acceleration f required to accelerate a rectangular tank containing water horizontally so that the slope of its free surface is 45°, is |
| A. | g/2 |
| B. | g |
| C. | 2 g |
| D. | 2.5 g |
| Answer» C. 2 g | |
| 39. |
Poise is the unit of |
| A. | viscosity |
| B. | velocity gradient |
| C. | mass density |
| D. | kinematic viscous. |
| Answer» B. velocity gradient | |
| 40. |
If the Mach number for a fluid flow is less than 1, the flow is |
| A. | sonic |
| B. | supersonic |
| C. | sub-sonic |
| D. | none of these. |
| Answer» D. none of these. | |
| 41. |
Atmospheric pressure varies with |
| A. | altitude |
| B. | temperature |
| C. | weather conditions |
| D. | all of the above. |
| Answer» E. | |
| 42. |
Water displaced by a floating wooden block of density 0.75, 5 m long, 2 m wide and 3 m high, is |
| A. | 17.5 m³ |
| B. | 20.0 m³ |
| C. | 22.5 m³ |
| D. | 25 km³. |
| Answer» D. 25 km³. | |
| 43. |
The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called |
| A. | path line |
| B. | stream line |
| C. | potential line |
| D. | streak line. |
| Answer» C. potential line | |
| 44. |
An open container filled with water is moved vertically downward with a uniform linear acceleration. The pressure at its bottom will be |
| A. | greater than static pressure |
| B. | equal to static pressure |
| C. | lesser than static pressure |
| D. | none of these. |
| Answer» D. none of these. | |
| 45. |
An error of 1% in measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to |
| A. | 1.25% |
| B. | 1.5% |
| C. | 1.75% |
| D. | 2.25% |
| Answer» C. 1.75% | |
| 46. |
Shear stress is directly proportional to |
| A. | the velocity |
| B. | the shear strain |
| C. | the viscosity |
| D. | the velocity. |
| Answer» C. the viscosity | |
| 47. |
The pressure less than atmospheric , pressure, is known |
| A. | suction pressure |
| B. | vacuum pressure |
| C. | negative gauge pressure |
| D. | all the above. |
| Answer» E. | |
| 48. |
Gauge pressure is |
| A. | absolute pressure - atmospheric pressure |
| B. | absolute pressure + atmospheric pressure |
| C. | atmospheric pressure - absolute pressure |
| D. | none of these. |
| Answer» B. absolute pressure + atmospheric pressure | |
| 49. |
The notch angle for maximum discharge over a triangular notch, is |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» D. 120° | |
| 50. |
The height of water level in a tank above the centre of a circular hole 2.5 cm in diameter is 50 m. The velocity of water flowing through the hole, is |
| A. | 31.1 m/sec |
| B. | 31.2 m/sec |
| C. | 31.3 m/sec |
| D. | 31.4 m/sec. |
| Answer» D. 31.4 m/sec. | |