McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 1. |
The main function of nozzle is to |
| A. | Varying temperatures |
| B. | Pressure variations |
| C. | Load variations |
| D. | Heat variations |
| Answer» B. Pressure variations | |
| 2. |
Which among the following control the flow rate? |
| A. | Valve |
| B. | Pump |
| C. | Head |
| D. | Tank pipe |
| Answer» A. Valve | |
| 3. |
Force exerted by a jet on a stationery plate happens in how many cases? |
| A. | 3 cases |
| B. | 2 cases |
| C. | 1 case |
| D. | Nil |
| Answer» A. 3 cases | |
| 4. |
Force exerted by a jet on a moving plate happens in how many cases? |
| A. | 3 cases |
| B. | 2 cases |
| C. | 1 case |
| D. | Nil |
| Answer» A. 3 cases | |
| 5. |
In a stationery vertical plate, the jet after striking the plate will move |
| A. | In opposite direction |
| B. | Along the plate |
| C. | Perpendicular to the plate |
| D. | Parallel to the plate |
| Answer» B. Along the plate | |
| 6. |
At what angle does the jet deflect after striking a stationery vertical plate? |
| A. | 30 |
| B. | 60 |
| C. | 90 |
| D. | 0 |
| Answer» C. 90 | |
| 7. |
The velocity component after striking the surface will be_ |
| A. | One |
| B. | Zero |
| C. | Infinity |
| D. | Negative |
| Answer» B. Zero | |
| 8. |
Which among the following is the formula for Force when it strikes the plate? |
| A. | pav2 |
| B. | pav |
| C. | pa |
| D. | maE |
| Answer» A. pav2 | |
| 9. |
To derive pav2, we take final velocity minus the initial velocity. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 10. |
The mass of water per sec striking the plate is |
| A. | pav2 |
| B. | pav |
| C. | pa |
| D. | maE |
| Answer» B. pav | |
| 11. |
Which among the following is formula for force when it acts along the direction of flow? |
| A. | pav2Sin2θ |
| B. | pav Sin2θ |
| C. | pa Sin2θ |
| D. | maE Sin2θ |
| Answer» A. pav2Sin2θ | |
| 12. |
Which among the following is a formula for force when it acts perpendicular to the direction of flow? |
| A. | pav2 SinθCosθ |
| B. | pav Sin2θ |
| C. | pa Sin2θ |
| D. | maE Sin2θ |
| Answer» A. pav2 SinθCosθ | |
| 13. |
A jet strikes a curved plate at its |
| A. | Sides |
| B. | Surface |
| C. | Centre |
| D. | Does not strike |
| Answer» C. Centre | |
| 14. |
During a weak jump, the value of Froude lies in between |
| A. | 1 to 2.5 |
| B. | 2.5 to 3.5 |
| C. | Less than 1 |
| D. | Zero |
| Answer» A. 1 to 2.5 | |
| 15. |
During an oscillating jump, the value of Froude lies in between |
| A. | 1 to 2.5 |
| B. | 2.5 to 4.5 |
| C. | Less than 1 |
| D. | Zero |
| Answer» A. 1 to 2.5 | |
| 16. |
A jet after striking a smooth plate comes out with a velocity. |
| A. | Increased |
| B. | Decreased |
| C. | Same |
| D. | Zero |
| Answer» C. Same | |
| 17. |
Component of velocity in direction of jet is -VCosθ |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 18. |
Jet propulsion is a method of generating propulsive force by reaction of |
| A. | Accelerating mass |
| B. | Volume |
| C. | Mass flow rate |
| D. | Velocity |
| Answer» A. Accelerating mass | |
| 19. |
The propulsive force drives the jet in the |
| A. | Backward direction |
| B. | Forward direction |
| C. | Perpendicular direction |
| D. | Parallel movement |
| Answer» B. Forward direction | |
| 20. |
Jet propulsion works on the principle of |
| A. | Newton’s first law |
| B. | Newton’s second law |
| C. | Newton’s third law |
| D. | Thermodynamic properties |
| Answer» C. Newton’s third law | |
| 21. |
What does Cv in jet propulsion equation stand for? |
| A. | Area of orifice |
| B. | Velocity |
| C. | Temperature coefficient |
| D. | Velocity coefficient |
| Answer» D. Velocity coefficient | |
| 22. |
The movement of ships and boats in water is due to |
| A. | Water currents |
| B. | Jet propulsion |
| C. | Mass flow rate |
| D. | Volumetric changes |
| Answer» B. Jet propulsion | |
| 23. |
The inlet orifices are at what angle with the motion of the ship? |
| A. | 0 |
| B. | 30 |
| C. | 60 |
| D. | 90 |
| Answer» D. 90 | |
| 24. |
Which among the following is a formula for force when it acts perpendicular to the direction of flow? |
| A. | pav2 SinθCosθ |
| B. | pav Sin2 θ |
| C. | pa Sin2 θ |
| D. | maE Sin2 θ |
| Answer» A. pav2 SinθCosθ | |
| 25. |
Which among the following is the formula for relative velocity? |
| A. | V + u |
| B. | Vu |
| C. | V – u |
| D. | V/u |
| Answer» A. V + u | |
| 26. |
Component of velocity in direction of jet is -VCosθ. What does ‘θ’ indicate? |
| A. | Angle made by jet |
| B. | Angle made by jet and outlet tip |
| C. | Angle made by jet and inlet tip |
| D. | Tangent angle |
| Answer» C. Angle made by jet and inlet tip | |
| 27. |
Principle of fluid mechanics works on the utilization of |
| A. | Accelerating mass |
| B. | Volume |
| C. | Work |
| D. | Velocity |
| Answer» C. Work | |
| 28. |
The force analysis on a curved vane is understood using |
| A. | Velocity triangles |
| B. | Angle of the plate |
| C. | Vane angles |
| D. | Plate dimensions |
| Answer» A. Velocity triangles | |
| 29. |
How is absolute velocity at inlet denoted? |
| A. | V |
| B. | V1 |
| C. | C |
| D. | v |
| Answer» B. V1 | |
| 30. |
The relative velocity is obtained by the equation |
| A. | u – V1 |
| B. | V1 |
| C. | u*V1 |
| D. | u/V1 |
| Answer» A. u – V1 | |
| 31. |
If the friction is neglected, then |
| A. | Vr1 > Vr2 |
| B. | Vr1 < Vr2 |
| C. | Vr1 = Vr2 |
| D. | Vr1 is a zero |
| Answer» C. Vr1 = Vr2 | |
| 32. |
If the pressure remains a constant, then |
| A. | Vr1 > Vr2 |
| B. | Vr1 < Vr2 |
| C. | Vr1 = Vr2 |
| D. | Vr1 is a zero |
| Answer» C. Vr1 = Vr2 | |
| 33. |
Jet propulsion of ship is less efficient than screw propeller due to |
| A. | Pressure |
| B. | Temperature |
| C. | Frictional losses |
| D. | Wear and tear |
| Answer» C. Frictional losses | |
| 34. |
Jet propulsion of ship in a very shallow water is needed to |
| A. | Avoid sinking of the ship |
| B. | Avoid damage of the propeller |
| C. | Avoid current directions |
| D. | Avoid surface damage |
| Answer» B. Avoid damage of the propeller | |
| 35. |
A turbojet does not consist of which of the following component? |
| A. | Compressor |
| B. | Combustion chamber |
| C. | Gas turbine |
| D. | Air filter |
| Answer» D. Air filter | |
| 36. |
Which among the following is not a type of jet engine? |
| A. | Turbojet |
| B. | Ramjet |
| C. | Scramjet |
| D. | Propulsive jet |
| Answer» D. Propulsive jet | |
| 37. |
Hydraulic energy is converted into another form of energy by hydraulic machines. What form of energy is that? |
| A. | Mechanical Energy |
| B. | Electrical Energy |
| C. | Nuclear Energy |
| D. | Elastic Energy |
| Answer» A. Mechanical Energy | |
| 38. |
Which principle is used in Hydraulic Turbines? |
| A. | Faraday law |
| B. | Newton’s second law |
| C. | Charles law |
| D. | Braggs law |
| Answer» B. Newton’s second law | |
| 39. |
Buckets and blades used in a turbine are used to: |
| A. | Alter the direction of water |
| B. | Switch off the turbine |
| C. | To regulate the wind speed |
| D. | To regenerate the power |
| Answer» A. Alter the direction of water | |
| 40. |
is the electric power obtained from the energy of the water. |
| A. | Roto dynamic power |
| B. | Thermal power |
| C. | Nuclear power |
| D. | Hydroelectric power |
| Answer» D. Hydroelectric power | |
| 41. |
Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft? |
| A. | Mechanical Energy |
| B. | Potential Energy |
| C. | Elastic Energy |
| D. | Kinetic Energy |
| Answer» A. Mechanical Energy | |
| 42. |
Hydraulic Machines fall under the category : |
| A. | Pulverizers |
| B. | Kinetic machinery |
| C. | Condensers |
| D. | Roto-dynamic machinery |
| Answer» D. Roto-dynamic machinery | |
| 43. |
Which kind of turbines changes the pressure of the water entered through it? |
| A. | Reaction turbines |
| B. | Impulse turbines |
| C. | Reactive turbines |
| D. | Kinetic turbines |
| Answer» A. Reaction turbines | |
| 44. |
Which type of turbine is used to change the velocity of the water through its flow? |
| A. | Kinetic turbines |
| B. | Axial flow turbines |
| C. | Impulse turbines |
| D. | Reaction turbines |
| Answer» C. Impulse turbines | |
| 45. |
Which type of turbine is a Francis Turbine? |
| A. | Impulse Turbine |
| B. | Screw Turbine |
| C. | Reaction turbine |
| D. | Turgo turbine |
| Answer» C. Reaction turbine | |
| 46. |
How many types of Reaction turbines are there? |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 9 |
| Answer» A. 5 | |
| 47. |
Maximum Number of jets, generally, employed in an impulse turbine without jet interference can be? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 48. |
The overall efficiency of a reaction turbine is the ratio of |
| A. | Actual work available at the turbine to the energy imparted to the wheel |
| B. | Work done on the wheel to the energy (or head of water) actually supplied to the turbine |
| C. | Power produced by the turbine to the energy actually supplied by the turbine |
| D. | Actual work available at the turbine to energy imparted to the wheel |
| Answer» A. Actual work available at the turbine to the energy imparted to the wheel | |
| 49. |
In a reaction turbine, the draft tube is used to |
| A. | To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race |
| B. | To prevent air to enter the turbine |
| C. | To increase pressure energy of water |
| D. | To transport water to downstream |
| Answer» A. To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race | |
| 50. |
In reaction turbine hydraulic efficiency is_ |
| A. | Ratio of actual work at the turbine to the energy imparted to the wheel. |
| B. | Ratio of work done on the wheel to energy that is supplied to the turbine. |
| C. | Ratio of power produced by the turbine to the energy actually supplied by the turbine. |
| D. | Ratio of Work done on the wheel to the energy (or head of water) actually supplied to the turbine. |
| Answer» B. Ratio of work done on the wheel to energy that is supplied to the turbine. | |
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