McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 801. |
The draft tube at the exit of the nozzle increases the |
| A. | Temperature |
| B. | Pressure |
| C. | Volume of the flow |
| D. | Density of flow |
| Answer» B. Pressure | |
| 802. |
Efficiency of a draft tube gives |
| A. | Temperature difference |
| B. | Pressure difference |
| C. | Kinetic energy difference |
| D. | Density of flow |
| Answer» C. Kinetic energy difference | |
| 803. |
Cavitation in a draft tube occurs when |
| A. | Temperature difference |
| B. | Pressure drop |
| C. | Kinetic energy difference |
| D. | Density of flow |
| Answer» B. Pressure drop | |
| 804. |
Which among the following is an important parameter to avoid cavitation? |
| A. | Tail race length |
| B. | Head race length |
| C. | Height of draft tube |
| D. | Pump |
| Answer» C. Height of draft tube | |
| 805. |
The draft tube is situated in the |
| A. | Inlet |
| B. | Outlet |
| C. | Tank |
| D. | Nozzle |
| Answer» B. Outlet | |
| 806. |
Which equation is applied to determine the flow? |
| A. | Newtons equation |
| B. | Rutherford’s equation |
| C. | Bernoulli’s equation |
| D. | Faradays equation |
| Answer» C. Bernoulli’s equation | |
| 807. |
Height of the draft tube is denoted by |
| A. | H |
| B. | h |
| C. | z |
| D. | x |
| Answer» C. z | |
| 808. |
Draft tube allows turbine to be placed above the tail race. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 809. |
The efficiency of the draft tube depends on the |
| A. | Heat |
| B. | Pressure |
| C. | Temperature |
| D. | Pressure and temperature |
| Answer» D. Pressure and temperature | |
| 810. |
Draft tubes have shafts |
| A. | Horizontal |
| B. | Vertical |
| C. | Circular |
| D. | Cross sectional |
| Answer» B. Vertical | |
| 811. |
Draft tubes are situated at the outlet in |
| A. | Pelton |
| B. | Reaction |
| C. | Kaplan |
| D. | Francis |
| Answer» A. Pelton | |
| 812. |
Efficiency of a draft tube is directly proportional to its |
| A. | Temperature |
| B. | Pressure |
| C. | Velocity |
| D. | Density |
| Answer» C. Velocity | |
| 813. |
Z is a draft tube is |
| A. | Temperature difference |
| B. | Pressure drop |
| C. | Kinetic energy difference |
| D. | Datum head |
| Answer» D. Datum head | |
| 814. |
Draft tube operates at |
| A. | Same efficiency |
| B. | Different efficiency |
| C. | Turbine |
| D. | Pump |
| Answer» A. Same efficiency | |
| 815. |
The draft tube is an |
| A. | Interior tube |
| B. | Exterior tube |
| C. | Tank depth alternator |
| D. | Nozzle tube |
| Answer» B. Exterior tube | |
| 816. |
What type of pressure does the draft tube depend upon? |
| A. | Gauge pressure |
| B. | Atm pressure |
| C. | Normal pressure |
| D. | Normal and Atm pressure |
| Answer» A. Gauge pressure | |
| 817. |
Gauge pressure of the draft tube is denoted by |
| A. | P |
| B. | h |
| C. | z |
| D. | x |
| Answer» A. P | |
| 818. |
Draft tube allows turbine to be placed below the tail race. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 819. |
Specific speed is denoted by |
| A. | N |
| B. | n |
| C. | Ns |
| D. | S |
| Answer» C. Ns | |
| 820. |
Specific speeds are used in pumps to determine |
| A. | Temperature |
| B. | Reaction speed |
| C. | Suction specific speed |
| D. | Wheel speed |
| Answer» C. Suction specific speed | |
| 821. |
The tube at the exit of the nozzle increases the |
| A. | Temperature |
| B. | Pressure |
| C. | Volume of the flow |
| D. | Density of flow |
| Answer» B. Pressure | |
| 822. |
Specific speed is used to characterize |
| A. | Turbomachinery speed |
| B. | Flow speed |
| C. | Energy flow |
| D. | Heat generated |
| Answer» A. Turbomachinery speed | |
| 823. |
Specific speed predicts the shape of a/an |
| A. | Pump |
| B. | Density head |
| C. | Impeller |
| D. | Motor |
| Answer» C. Impeller | |
| 824. |
What helps in categorizing the impellers? |
| A. | Quasi static number |
| B. | Rotor |
| C. | Height of draft tube |
| D. | Pump |
| Answer» A. Quasi static number | |
| 825. |
Imperial units is defined as |
| A. | Temperature by pressure |
| B. | Tail race and head race |
| C. | Revolutions per minute |
| D. | Turbine performance |
| Answer» C. Revolutions per minute | |
| 826. |
Ratio of pump or turbine with reference pump or turbine is called as |
| A. | Efficiency |
| B. | Performance |
| C. | Heat generated |
| D. | Relative velocity |
| Answer» B. Performance | |
| 827. |
Low specific speed in hydraulic head is developed due to |
| A. | Mass flow rate |
| B. | Increase in temperature |
| C. | Centrifugal force |
| D. | Increase in pressure |
| Answer» C. Centrifugal force | |
| 828. |
Centrifugal pump impellers have speed ranging from |
| A. | 500- 10000 |
| B. | 50- 100 |
| C. | 200-300 |
| D. | 0-50 |
| Answer» A. 500- 10000 | |
| 829. |
What is the unit of specific speed in metric system? |
| A. | m.s |
| B. | m/s |
| C. | m3/s |
| D. | m |
| Answer» C. m3/s | |
| 830. |
Specific speed develop a hydraulic flow through the centrifugal pumps. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 831. |
Net suction speed is used in problems with cavitation. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 832. |
The runner diameter in a turbine is denoted as |
| A. | A |
| B. | Dr |
| C. | Rr |
| D. | De |
| Answer» D. De | |
| 833. |
Specific speed is the speed of the turbine which is similar to its |
| A. | Temperature difference |
| B. | Pressure difference |
| C. | Aspect ratio |
| D. | Speed of rotor |
| Answer» C. Aspect ratio | |
| 834. |
Specific speed develops a unit power under a unit |
| A. | Temperature |
| B. | Pressure |
| C. | Volume of the flow |
| D. | Head |
| Answer» D. Head | |
| 835. |
Impeller in a motor is used to |
| A. | Change temperatures |
| B. | Change Pressure |
| C. | Kinetic energy change |
| D. | Change density |
| Answer» B. Change Pressure | |
| 836. |
Hydraulic head is also called as |
| A. | Pressure head |
| B. | Density head |
| C. | Kinetic head |
| D. | Piezometric head |
| Answer» D. Piezometric head | |
| 837. |
Specific speed of a Pelton wheel with single jet is |
| A. | 8.5 to 30 |
| B. | 30 to 51 |
| C. | 51 to 225 |
| D. | 230 to 500 |
| Answer» A. 8.5 to 30 | |
| 838. |
Specific speed is an index used to predict |
| A. | Head race distance |
| B. | Tail race distance |
| C. | Tank dimensions |
| D. | Turbine performance |
| Answer» D. Turbine performance | |
| 839. |
Specific speed of a Pelton wheel with multiple jets is |
| A. | 8.5 to 30 |
| B. | 30 to 51 |
| C. | 51 to 225 |
| D. | 230 to 500 |
| Answer» B. 30 to 51 | |
| 840. |
Specific speed of a Francis turbine is |
| A. | 8.5 to 30 |
| B. | 30 to 51 |
| C. | 51 to 225 |
| D. | 230 to 500 |
| Answer» C. 51 to 225 | |
| 841. |
Specific speed of a Kaplan turbine is |
| A. | 8.5 to 30 |
| B. | 30 to 51 |
| C. | 51 to 225 |
| D. | 355 to 860 |
| Answer» D. 355 to 860 | |
| 842. |
Specific speed less than 500 are called |
| A. | Positive displacement pumps |
| B. | Negative displacement pumps |
| C. | Draft tubes |
| D. | Tanks |
| Answer» A. Positive displacement pumps | |
| 843. |
With the increase in specific speeds, |
| A. | Head race distance increases |
| B. | Tail race distance increases |
| C. | Tank dimensions increases |
| D. | Diameters of impeller increases |
| Answer» D. Diameters of impeller increases | |
| 844. |
Specific speed is used to predict desired pump or turbine performance. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 845. |
Once we know the desired functions of the specific speed, it is easier to calculate its components units. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 846. |
Which among the following is not a unit quantity of turbine? |
| A. | Unit speed |
| B. | Unit discharge |
| C. | Unit power |
| D. | Unit temperature |
| Answer» D. Unit temperature | |
| 847. |
What does DMU stand for? |
| A. | Density matter usage |
| B. | Direct material usage |
| C. | Density material usage |
| D. | Depth matter usage |
| Answer» B. Direct material usage | |
| 848. |
Unit speed is the speed of the turbine operating under_ |
| A. | One-meter head |
| B. | Pressure head |
| C. | Volumetric head |
| D. | Draft tube |
| Answer» A. One-meter head | |
| 849. |
One dyne is equal to N. |
| A. | 10 |
| B. | 100 |
| C. | 1000 |
| D. | 10-5 |
| Answer» D. 10-5 | |
| 850. |
What is symbol for unit speed? |
| A. | S |
| B. | N |
| C. | Ns |
| D. | Nu |
| Answer» D. Nu | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.