Multiple Choice Questions on Hydraulic MachinesThe Following Section consists of Multiple Choice Questions on Hydraulic Machines. Take the test on Hydraulic Machines problems.
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Hydraulic Machines MCQ
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Question 1 of 20
1. Question
1 pointsPower required to drive a centrifugal pump is directly proportional to __________ of its impeller.
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Question 2 of 20
2. Question
1 pointsThe mechanical efficiency of an impulse turbine is
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Question 3 of 20
3. Question
1 pointsDischarge of a centrifugal pump is
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Question 4 of 20
4. Question
1 pointsA Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is
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Question 5 of 20
5. Question
1 pointsGeometric similarity is said to exist between the model and the prototype, if both of them
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Question 6 of 20
6. Question
1 pointsIn a reaction turbine, the draft tube is used
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Question 7 of 20
7. Question
1 pointsSlip of a reciprocating pump is defined as the
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Question 8 of 20
8. Question
1 pointsMulti-stage centrifugal pumps are used to
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Question 9 of 20
9. Question
1 pointsThe specific speed of a centrifugal pump, delivering 750 litres of water per second against a head of 15 metres at 725 r.p.m., is
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Question 10 of 20
10. Question
1 pointsWhich of the following pump is preferred for flood control and irrigation applications?
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Question 11 of 20
11. Question
1 pointsWhich of the following turbine is preferred for 0 to 25 m head of water?
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Question 12 of 20
12. Question
1 pointsThe overall efficiency of a reaction turbine is the ratio of
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Question 13 of 20
13. Question
1 pointsThe maximum number of jets, generally, employed in an impulse turbine without jet interference are
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Question 14 of 20
14. Question
1 pointsA centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the
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Question 15 of 20
15. Question
1 pointsA Francis turbine is used when the available head of water is
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Question 16 of 20
16. Question
1 pointsThe specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is
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Question 17 of 20
17. Question
1 pointsA hydraulic coupling belongs to the category of
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Question 18 of 20
18. Question
1 pointsThe speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as
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Question 19 of 20
19. Question
1 pointsFor centrifugal pump impeller, the maximum value of the vane exit angle is
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Question 20 of 20
20. Question
1 pointsManometric head, in case of a centrifugal pump, is equal to
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Hydraulic Machines MCQ 2
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Question 1 of 20
1. Question
1 pointsThe maximum efficiency of jet propulsion of a ship with inlet orifices at right angles to the direction of motion of ship, is
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Question 2 of 20
2. Question
1 pointsThe ratio of quantity of liquid discharged per second from the pump to the quantity of liquid passing per second through the impeller is known as
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Question 3 of 20
3. Question
1 pointsThe impeller of a centrifugal pump may have
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Question 4 of 20
4. Question
1 pointsKinematic similarity is said to exist between the model and the prototype, if both of them
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Question 5 of 20
5. Question
1 pointsThe flow ratio of Francis turbine is defined as the ratio of the
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Question 6 of 20
6. Question
1 pointsDynamic similarity is said to exist between the model and the prototype, if both of them
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Question 7 of 20
7. Question
1 pointsA hydraulic ram is a device used to
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Question 8 of 20
8. Question
1 pointsOverall efficiency of a centrifugal pump is the ratio of
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Question 9 of 20
9. Question
1 pointsIn an inward flow reaction turbine
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Question 10 of 20
10. Question
1 pointsThe working of which of the following hydraulic units is based on Pascal’s law?
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Question 11 of 20
11. Question
1 pointsThe hydraulic efficiency of a reaction turbine, is the ratio of
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Question 12 of 20
12. Question
1 pointsIn order to avoid cavitation in centrifugal pumps
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Question 13 of 20
13. Question
1 pointsWhich of the following pump is generally used to pump highly viscous fluid?
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Question 14 of 20
14. Question
1 pointsBy fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is
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Question 15 of 20
15. Question
1 pointsIn a reciprocating pump, air vessels are used to
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Question 16 of 20
16. Question
1 pointsIf the ratio’s of the corresponding forces acting at corresponding points are equal, then the model and the prototype are said to have.
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Question 17 of 20
17. Question
1 pointsA Pelton wheel working under a constant head and discharge, has maximum efficiency when the speed ratio is
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Question 18 of 20
18. Question
1 pointsBy fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power. This saving in case of a single acting reciprocating pump is
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Question 19 of 20
19. Question
1 pointsIn a Francis turbine runner, the number of blades are generally between
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Question 20 of 20
20. Question
1 pointsA Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit speed of the wheel is
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Hydraulic Machines MCQ 3
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Question 1 of 20
1. Question
1 pointsThe specific speed of a hydraulic turbine depends upon
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Question 2 of 20
2. Question
1 pointsThe depth of the bucket for a Pelton wheel is generally __________ the diameter of jet.
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Question 3 of 20
3. Question
1 pointsAn impulse turbine is used for
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Question 4 of 20
4. Question
1 pointsThe cavitation in reaction turbines is avoided, to a great extent by
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Question 5 of 20
5. Question
1 pointsWhich type of the pump is different from others in the same group?
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Question 6 of 20
6. Question
1 pointsA Pelton wheel is
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Question 7 of 20
7. Question
1 pointsSlip of a reciprocating pump is negative, when
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Question 8 of 20
8. Question
1 pointsWhich of the following is not an impulse turbine?
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Question 9 of 20
9. Question
1 pointsThe Furneyron turbine is __________ reaction turbine.
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Question 10 of 20
10. Question
1 pointsWhich of the following pump is sucessfully used for lifting water to the boilers?
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Question 11 of 20
11. Question
1 pointsWhich of the following pump is successfully used for lifting water from deep wells?
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Question 12 of 20
12. Question
1 pointsThe Thomson’s turbine is __________ reaction turbine.
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Question 13 of 20
13. Question
1 pointsThe hydraulic efficiency of an impulse turbine is the
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Question 14 of 20
14. Question
1 pointsThe overall efficiency for a Pelton wheel lies between
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Question 15 of 20
15. Question
1 pointsWhich of the following statement is wrong ?
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Question 16 of 20
16. Question
1 pointsWhich of the following statement is correct as regard to water wheels?
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Question 17 of 20
17. Question
1 pointsBraking jet in an impulse turbine is used
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Question 18 of 20
18. Question
1 pointsHead developed by a centrifugal pump is
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Question 19 of 20
19. Question
1 pointsA double overhung Pelton wheel has
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Question 20 of 20
20. Question
1 pointsWhich of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?
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Hydraulic Machines MCQ 4
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Question 1 of 20
1. Question
1 pointsIf the ratio of all the corresponding linear dimensions are equal, then the model and the prototype are said to have
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Question 2 of 20
2. Question
1 pointsThe undershot water wheels are those in which
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Question 3 of 20
3. Question
1 pointsA turbine is required to develop 1500 kW at 300 r.p.m. under a head of 150 m. Which of the following turbine should be used ?
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Question 4 of 20
4. Question
1 pointsWhich of the following pump is suitable for small discharge and high heads?
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Question 5 of 20
5. Question
1 pointsIn an outward flow reaction turbine
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Question 6 of 20
6. Question
1 pointsA hydraulic press is a device used
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Question 7 of 20
7. Question
1 pointsThe flow ratio in case of Francis turbine varies from
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Question 8 of 20
8. Question
1 pointsWhich of the following turbine is preferred for a specific speed of 60 to 300 r.p.m.?
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Question 9 of 20
9. Question
1 pointsThe function of guide vanes in a reaction turbine is to
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Question 10 of 20
10. Question
1 pointsWhich of the following statement is correct ?
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Question 11 of 20
11. Question
1 pointsThe jet ratio is defined as the ratio of the
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Question 12 of 20
12. Question
1 pointsMechanical efficiency of a centrifugal pump is the ratio of
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Question 13 of 20
13. Question
1 pointsThe cavitation in a hydraulic machine is mainly due to
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Question 14 of 20
14. Question
1 pointsIn a centrifugal pump, the regulating valve is provided on the
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Question 15 of 20
15. Question
1 pointsThe specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which
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Question 16 of 20
16. Question
1 pointsThe runaway speed of a hydraulic turbine is the speed
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Question 17 of 20
17. Question
1 pointsThe type of centrifugal pump preferred for a specific speed of 20 r.p.m. is
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Question 18 of 20
18. Question
1 pointsIf the net positive suction head (NPSH) requirement for the pump is not satisfied, then
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Question 19 of 20
19. Question
1 pointsA turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is
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Question 20 of 20
20. Question
1 pointsWhich of the following pump is successfully used for lifting water to the turbines?
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