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

Question

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

A. Lift and resultant force

B. Drag and resultant force

C. Lift and tangential force

D. Lift and drag

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The hydraulic efficiency of a reaction turbine, is the ratio of

A. Power produced by the turbine to the energy actually supplied by the turbine

B. Actual work available at the turbine to energy imparted to the wheel

C. Workdone on the wheel to the energy (or head of water) actually supplied to the turbine

D. None of the above

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The discharge through a reaction turbine ________ with the increase in unit speed.

A. Decreases

B. Increases

C. Remain same

D. None of these

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The static head of a centrifugal pump is equal to the ________ of suction head and delivery head.

A. Product

B. Difference

C. Sum

D. None of these

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The cavitation in a hydraulic machine is mainly due to

A. Low velocity

B. High velocity

C. Low pressure

D. High pressure

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The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

A. [wa (V - v)]/2g

B. [wa (V - v)]/g

C. [wa (V - v)²]/2g

D. [wa (V - v²)]/g

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

A. Two

B. Four

C. Six

D. Eight

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Which type of the pump is different from others in the same group?

A. Screw pump

B. Gear pump

C. Cam and piston pump

D. Plunger pump

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For small discharge at high pressure, following pump is preferred

A. Centrifugal

B. Axial flow

C. Mixed flow

D. Reciprocating

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In a Kaplan turbine runner, the numbers of blades are generally between

A. 2 to 4

B. 4 to 8

C. 8 to 16

D. 16 to 24

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The angle of taper on draft tube is

A. Greater than 15°

B. Greater than 8°

C. Greater than 5°

D. Less than 8°

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Slip of a reciprocating pump is defined as the

A. Ratio of actual discharge to the theoretical discharge

B. Sum of actual discharge and the theoretical discharge

C. Difference of theoretical discharge and the actual discharge

D. Product of theoretical discharge and the actual discharge

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When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

A. Horizontal

B. Nearly horizontal

C. Steep

D. First rise and then fall

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For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

A. Centrifugal

B. Axial flow

C. Reciprocating

D. Mixed flow

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An impulse turbine is used for

A. Low head of water

B. High head of water

C. Medium head of water

D. High discharge

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Low specific speed of turbine implies it is

A. Propeller turbine

B. Francis turbine

C. Impulse turbine

D. Any one of the above

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Reaction turbines are used for

A. Low head

B. High head

C. High head and low discharge

D. Low head and high discharge

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Centrifugal pump is started with its delivery valve

A. Kept fully closed

B. Kept fully open

C. Irrespective of any position

D. Kept 50% open

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For starting an axial flow pump, its delivery valve should be

A. Closed

B. Open

C. Depends on starting condition and flow desired

D. Could be either open or closed

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The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

A. Delivers unit discharge under unit head

B. Delivers unit discharge under unit speed

C. Develops unit power under unit head

D. Develops unit power under unit speed

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A hydraulic accumulator normally consists of

A. Two cylinders, two rams and a storage device

B. A cylinder and a ram

C. Two coaxial rams and two cylinders

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

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The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

A. Slow speed with radial flow at outlet

B. Medium speed with radial flow at outlet

C. High speed with radial flow at outlet

D. High speed with mixed flow at outlet

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A hydraulic intensifier normally consists of

A. Two cylinders, two rams and a storage device

B. A cylinder and a ram

C. Two coaxial rams and two cylinders

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

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

A. η_h = η_o × η_m

B. η_m = η_m × η_h

C. η_o = η_h × η_m

D. None of these

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

A. Radially, axially

B. Axially, radially

C. Axially, axially

D. Radially, radially

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Air vessels in reciprocating pump are used to

A. Smoothen flow

B. Reduce acceleration to minimum

C. Increase pump efficiency

D. Save pump from cavitations

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The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

A. 2V/(v_r - v)

B. 2V/(v_r + v)

C. V/(v_r - v)

D. V/(v_r + v)

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A 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 discharge of wheel is

A. 0.25 m³/s

B. 0.5 m³/s

C. 1.5 m³/s

D. 2.5 m³/s

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In a centrifugal pump casing, the flow of water leaving the

A. Radial

B. Axial

C. Centrifugal

D. Vortex

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The speed of a turbine runner is

A. Directly proportional to H^1/2

B. Inversely proportional to H^1/2

C. Directly proportional to H^3/2

D. Inversely proportional to H^3/2

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The power developed by a turbine is (where H = Head of water under which the turbine is working)

A. Directly proportional to H^1/2

B. Inversely proportional to H^1/2

C. Directly proportional to H^3/2

D. Inversely proportional to H^3/2

Discuss this answer

Accepted Answer

A. Lift and resultant force

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

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

The hydraulic efficiency of a reaction turbine, is the ratio of

The discharge through a reaction turbine ________ with the increase in unit speed.

The static head of a centrifugal pump is equal to the ________ of suction head and delivery head.

The cavitation in a hydraulic machine is mainly due to

The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

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

Which type of the pump is different from others in the same group?

For small discharge at high pressure, following pump is preferred

In a Kaplan turbine runner, the numbers of blades are generally between

The angle of taper on draft tube is

Slip of a reciprocating pump is defined as the

When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

An impulse turbine is used for

Low specific speed of turbine implies it is

Reaction turbines are used for

Centrifugal pump is started with its delivery valve

For starting an axial flow pump, its delivery valve should be

The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

A hydraulic accumulator normally consists of

The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

A hydraulic intensifier normally consists of

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

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

Air vessels in reciprocating pump are used to

The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

A 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 discharge of wheel is

In a centrifugal pump casing, the flow of water leaving the

The speed of a turbine runner is

The power developed by a turbine is (where H = Head of water under which the turbine is working)

Also checkout

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

Correct Answer :

Show all Hydraulics & Fluid Machineries MCQ

Related Questions

The hydraulic efficiency of a reaction turbine, is the ratio of

The discharge through a reaction turbine ________ with the increase in unit speed.

The static head of a centrifugal pump is equal to the ________ of suction head and delivery head.

The cavitation in a hydraulic machine is mainly due to

The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

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

Which type of the pump is different from others in the same group?

For small discharge at high pressure, following pump is preferred

In a Kaplan turbine runner, the numbers of blades are generally between

The angle of taper on draft tube is

Slip of a reciprocating pump is defined as the

When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be

For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred

An impulse turbine is used for

Low specific speed of turbine implies it is

Reaction turbines are used for

Centrifugal pump is started with its delivery valve

For starting an axial flow pump, its delivery valve should be

The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

A hydraulic accumulator normally consists of

The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

A hydraulic intensifier normally consists of

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

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

Air vessels in reciprocating pump are used to

The water in a jet propelled boat is drawn through the openings facing the direction of motion of the boat. The efficiency of propulsion is given by

A 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 discharge of wheel is

In a centrifugal pump casing, the flow of water leaving the

The speed of a turbine runner is

The power developed by a turbine is (where H = Head of water under which the turbine is working)

Also checkout

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