Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of

Question

Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of

A. 39.2 %

B. 49.2 %

C. 68.8 %

D. 84.8 %

Correct Answer :

D. 84.8 %

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Which of the following statement is wrong?

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Runaway speed of a hydraulic turbine is

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The gross or total head of the turbine is the ________ of the water levels at the head race and tail race.

A. Sum

Discuss this answer

The speed ratio in case of Francis turbine varies from

Discuss this answer

Head developed by a centrifugal pump is

Discuss this answer

The Thomson's turbine is __________ reaction turbine.

Discuss this answer

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Discuss this answer

Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

Discuss this answer

In a reciprocating pump, air vessels are used to

Discuss this answer

Head developed by a centrifugal pump depends on

B. Speed

Discuss this answer

By 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

A. 39.2 %

B. 48.8 %

C. 84.8 %

D. 88.4 %

Discuss this answer

The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

Discuss this answer

The 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

Discuss this answer

Multistage centrifugal pumps are used to obtain

Discuss this answer

In axial flow fans and turbines, fluid enters and leaves as follows

Discuss this answer

The Fourneyron turbine is _________ reaction turbine.

Discuss this answer

A hydraulic intensifier normally consists of

Discuss this answer

The unit speed of the turbine runner is

A. N/√H

B. N/H

D. N/H²

Discuss this answer

The maximum number of jets generally employed in impulse turbine without jet interference is

A. 4

B. 6

C. 8

D. 12

Discuss this answer

Which of the following pump is suitable for small discharge and high heads?

Discuss this answer

The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) is

Discuss this answer

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

Discuss this answer

In a reaction turbine, the draft tube is used

Discuss this answer

Centrifugal pump is started with its delivery valve

Discuss this answer

A hydraulic accumulator normally consists of

Discuss this answer

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

Discuss this answer

The maximum number of jets, generally, employed in an impulse turbine without jet interference are

A. Two

B. Four

C. Six

D. Eight

Discuss this answer

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

A. L.A.N

Discuss this answer

The flow ratio in case of Francis turbine varies from

Discuss this answer

One horsepower is equal to

Discuss this answer

Answer 1

A. The reaction turbines are used for low head and high discharge.

Answer 2

B. The angle of taper on draft tube is less than 8°.

Answer 3

C. An impulse turbine is generally fitted slightly above the tail race.

Answer 4

D. A Francis turbine is an impulse turbine.

Answer 5

A. Full load speed

Answer 6

B. The speed at which turbine runner will be damaged

Answer 7

C. The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

Answer 8

D. The speed corresponding to maximum overload permissible

Answer 9

B. Difference

Answer 10

C. Product

Answer 11

D. None of these

Answer 12

A. 0.15 to 0.3

Answer 13

B. 0.4 to 0.5

Answer 14

C. 0.6 to 0.9

Answer 15

D. 1 to 1.5

Answer 16

A. Proportional to diameter of impeller

Answer 17

B. Proportional to speed of impeller

Answer 18

C. Proportional to diameter and speed of impeller

Answer 19

D. None of the above

Answer 20

A. An axial flow

Answer 21

B. An inward flow

Answer 22

C. An outward flow

Answer 23

D. A mixed flow

Answer 24

A. Hydraulic

Answer 25

B. Mechanical

Answer 26

C. Overall

Answer 27

D. None of these

Answer 28

A. Lift and resultant force

Answer 29

B. Drag and resultant force

Answer 30

C. Lift and tangential force

Answer 31

D. Lift and drag

Answer 32

A. Smoothen the flow

Answer 33

B. Reduce suction head

Answer 34

C. Increase delivery head

Answer 35

D. Reduce acceleration head

Answer 36

A. Impeller diameter

Answer 37

C. Fluid density

Answer 38

D. Both (A) and (B) above

Answer 39

A. Slow speed pump with radial flow at outlet

Answer 40

B. Medium speed pump with radial flow at outlet

Answer 41

C. High speed pump with radial flow at outlet

Answer 42

D. High speed pump with axial flow at outlet

Answer 43

A. 24.8 r.p.m.

Answer 44

B. 48.2 r.p.m

Answer 45

C. 82.4 r.p.m.

Answer 46

D. 248 r.p.m

Answer 47

A. High discharge

Answer 48

B. High head

Answer 49

C. Pumping of viscous fluids

Answer 50

D. High head and high discharge

Answer 51

A. Radially, axially

Answer 52

B. Axially, radially

Answer 53

C. Axially, axially

Answer 54

D. Radially, radially

Answer 55

A. An axial flow

Answer 56

B. An inward flow

Answer 57

C. An outward flow

Answer 58

D. A mixed flow

Answer 59

A. Two cylinders, two rams and a storage device

Answer 60

B. A cylinder and a ram

Answer 61

C. Two coaxial rams and two cylinders

Answer 62

D. A cylinder, a piston, storage tank and control valve

Answer 63

C. N/H^3/2

Answer 64

A. Centrifugal pump

Answer 65

B. Axial flow pump

Answer 66

C. Mixed flow pump

Answer 67

D. Reciprocating pump

Answer 68

A. η_h = η_o × η_m

Answer 69

B. η_m = η_m × η_h

Answer 70

C. η_o = η_h × η_m

Answer 71

D. None of these

Answer 72

A. 175.4 r.p.m.

Answer 73

B. 215.5 r.p.m.

Answer 74

C. 241.5 r.p.m.

Answer 75

D. 275.4 r.p.m

Answer 76

A. To run the turbine full

Answer 77

B. To prevent air to enter the turbine

Answer 78

C. To increase the head of water by an amount equal to the height of the runner outlet above the tail race

Answer 79

D. To transport water to downstream

Answer 80

A. Kept fully closed

Answer 81

B. Kept fully open

Answer 82

C. Irrespective of any position

Answer 83

D. Kept 50% open

Answer 84

A. Two cylinders, two rams and a storage device

Answer 85

B. A cylinder and a ram

Answer 86

C. Two coaxial rams and two cylinders

Answer 87

D. A cylinder, a piston, storage tank and control valve

Answer 88

A. High initial and maintenance cost

Answer 89

B. Lower discharge

Answer 90

C. Lower speed of operation

Answer 91

D. Necessity of air vessel

Answer 92

B. 2 L.A.N

Answer 93

C. (L.A.N)/60

Answer 94

D. (2 L.A.N)/60

Answer 95

A. 0.15 to 0.3

Answer 96

B. 0.4 to 0.5

Answer 97

C. 0.6 to 0.9

Answer 98

D. 1 to 1.5

Answer 99

A. 102 watts

Answer 100

B. 75 watts

Answer 101

C. 550 watts

Answer 102

D. 735 watts

Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

Which of the following statement is wrong?

Runaway speed of a hydraulic turbine is

The gross or total head of the turbine is the ________ of the water levels at the head race and tail race.

The speed ratio in case of Francis turbine varies from

Head developed by a centrifugal pump is

The Thomson's turbine is __________ reaction turbine.

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

In a reciprocating pump, air vessels are used to

Head developed by a centrifugal pump depends on

By 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

The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

The 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

Multistage centrifugal pumps are used to obtain

In axial flow fans and turbines, fluid enters and leaves as follows

The Fourneyron turbine is _________ reaction turbine.

A hydraulic intensifier normally consists of

The unit speed of the turbine runner is

The maximum number of jets generally employed in impulse turbine without jet interference is

Which of the following pump is suitable for small discharge and high heads?

The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) is

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

In a reaction turbine, the draft tube is used

Centrifugal pump is started with its delivery valve

A hydraulic accumulator normally consists of

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

The maximum number of jets, generally, employed in an impulse turbine without jet interference are

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

The flow ratio in case of Francis turbine varies from

One horsepower is equal to

Also checkout

Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

Which of the following statement is wrong?

Runaway speed of a hydraulic turbine is

The gross or total head of the turbine is the ________ of the water levels at the head race and tail race.

The speed ratio in case of Francis turbine varies from

Head developed by a centrifugal pump is

The Thomson's turbine is __________ reaction turbine.

The ratio of actual work available at the turbine to the energy imparted to the wheel is known as ________ efficiency.

Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between

In a reciprocating pump, air vessels are used to

Head developed by a centrifugal pump depends on

By 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

The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

The 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

Multistage centrifugal pumps are used to obtain

In axial flow fans and turbines, fluid enters and leaves as follows

The Fourneyron turbine is _________ reaction turbine.

A hydraulic intensifier normally consists of

The unit speed of the turbine runner is

The maximum number of jets generally employed in impulse turbine without jet interference is

Which of the following pump is suitable for small discharge and high heads?

The relation between hydraulic efficiency (ηh), mechanical efficiency (ηm) and overall efficiency (ηo) is

A turbine develops 10000 kW under a head of 25 metres at 135 r.p.m. Its specific speed is

In a reaction turbine, the draft tube is used

Centrifugal pump is started with its delivery valve

A hydraulic accumulator normally consists of

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of

The maximum number of jets, generally, employed in an impulse turbine without jet interference are

The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)

The flow ratio in case of Francis turbine varies from

One horsepower is equal to

Also checkout

The relation between hydraulic efficiency (η_h), mechanical efficiency (η_m) and overall efficiency (η_o) is