Hydraulic Machines MCQs Set-3 | - Online Exam Test Papers | - MCQs[multiple choice questions and answers ] | - Mock Test Papers | - Practice Papers

/Hydraulic Machines MCQs Set-3 MCQS HUB ,Sample Test,Sample questions

Question:

 _________ means the angle made by absolute velocity with the tangent on the wheel is 90 degrees and the component of whirl velocity is zero.

1.Axial discharge

2.Tangential discharge

3.Turbulent discharge

4.Radial discharge

Question:

An outward radial reaction turbine has ______

1.u1 < u2

2.u1 > u2

3.u1 = u2

4.u2 = u1 = 0

Question:

At high pressure, the voids can generate ______

1.Drag force

2.Mass density

3.Shock waves

4. Flow speed

Question:

Cavitation usually occurs due to the changes in ________

1.Pressure

2.Temperature

3.Volume

4.Heat

Question:

Centrifugal head in Outward flow reaction turbine _____________

1.Increases

2.Decreases

3.Remains constant

4.Gradually decreases

Question:

Degree of reaction turbine is the ratio of?

1.Pressure energy to total energy

2.Kinetic energy to total energy

3.Potential energy to total energy

4.Kinetic energy to potential energy

Question:

Degree of reactions are most commonly used in________

1.Turbomachinery

2.Pressure drag

3.Aerodynamics

4.Automobiles

Question:

Discharge in an outward flow reaction turbine ____________

1.Increases

2.Decreases

3.Remains constant

4.Gradually decreases

Question:

Discharge in outward flow reaction turbine ____________

1.Increases

2.Decreases

3.Remains constant

4.Gradually decreases

Question:

Discharge through a reaction flow reaction turbine is given by, Q = ______

1.Pi*d*b*Vf1

2.Pi*d*d*b*Vf1

3.Pi*d*b*b*Vf2

4.Pi*b*b*Vf1

Question:

Discharge through radial flow reaction turbine is ______________

1.P1*b1*Vf1

2.P2*b2*Vf2

3.P1*b2*Vf2

4.Both P1*b1*Vf1 & P2*b2*Vf2

Question:

For an actual reaction turbine, what should be the angle beta, such that the loss of kinetic energy at the outlet is to be minimum?

1.90

2.45

3. 60

4.30

Question:

Hydrodynamic cavitation is due to the process of _________

1.Vaporisation

2.Sedimentation

3.Filtration

4.Excavation

Question:

If the water flows from inwards to outwards, the turbine is known as _____________

1.Tangential flow turbine

2.Turbulent low inward flow

3.Inward flow turbine

4.Outward flow turbine

Question:

In a Francis turbine, degree of reaction lies between _____

1.0 and 1

2.1 and 2

3. 0 and 0.5

4.0.5 and 0.1

Question:

In an outward radial flow reaction turbine the ratio of tangential velocity at inlet to the given velocity is ______

1.Speed ratio

2.Flow ratio

3.Discharge

4.Radial discharge

Question:

In an outward radial flow reaction turbine the ratio of tangential wheel at inlet to given velocity of jet is known as ___________

1.Speed ratio

2.Flow ratio

3.Discharge

4. Radial discharge

Question:

In case of gas turbines and compressors, degree of reaction is ________

1.Static pressure drop in rotor/ static pressure drop in stage

2.Static pressure drop in stage/ static pressure drop in rotor

3.Isentropic enthalpy drop in rotor/ isentropic enthalpy drop in stage

4.Static temperature drop in stage/ static temperature drop in rotor

Question:

In general, reaction turbines consist of which types of energies?

1.kinetic energy and potential energy

2.potential energy and pressure energy

3.kinetic energy and pressure energy

4.gravitational energy and potential energy

Question:

In Pelton turbine inlet velocity of jet is 85.83m/s, inlet and outlet whirl velocities be 85.83 and 0.143 and blade velocity be 38.62 then its hydraulic efficiency is ___________

1.90.14%

2.80%

3.70%

4.85%

Question:

In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), where “k” is known as _______

1.Specific density of liquid

2.Density of liquid

3.Specific gravity of liquid

4.Volume of liquid

Question:

Main parts of radial flow reaction turbines are ______________

1.Casing

2.Guide mechanism

3.Draft tube

4.All of the mentioned

Question:

Radial flow reaction turbines are those turbines in which water flows ____________

1.Radial direction

2. Axial direction

3.Tangential direction

4.All of the mentioned

Question:

Radial flow reaction turbines contain spiral casing which area ____________

1.Remains constant

2.Gradually decreases

3.Gradually increases

4.Suddenly decreases

Question:

Runner blades are made up of _____________

1.Cast steel

2.Cast iron

3.Wrought iron

4.Steel

Question:

Speed control of Outward flow reaction turbine is _____________

1.Easy

2.Moderate

3. Difficult

4.Very difficult

Question:

Tendency of wheel to race is predominant in____________turbine

1.Inward flow reaction turbine

2.Outward flow reaction turbine

3.Impulse turbine

4.Axial flow turbine

Question:

The casing of radial flow reaction turbine is made of spiral shape, so that water may enter the runner__________

1.Variable acceleration

2.Constant acceleration

3.Variable velocity

4.Constant velocity

Question:

The energy available at inlet for outward reaction flow turbine is ____________

1.Potential

2.Kinetic energy

3.Pressure energy

4.Pressure energy and Kinetic energy

Question:

The expression for hydraulic efficiency is given by

1.2(V1-u)[1+cos k]u/V1*V1

2.2(V1+u)[1+cos k]u/V1*V1

3.2(V1-u)[1-cos k]u/V1*V1

4. 2(V1+u)[1+cos k]u/V1*V1

Question:

The formation of vapour cavities is called _____

1.Static pressure drop

2.Cavitation

3.Isentropic expansion

4.Emulsion

Question:

The outward radial flow reaction turbine is a turbine in which direction of water flow is ___________

1.Radial direction

2. Radially inward

3.Radially outward

4.Axial direction

Question:

The pressure at the exit of runner of reaction turbine is generally____________than atmospheric pressure

1.Greater

2.Lesser

3.Constant

4.Equal

Question:

The process of bubble generation leads to __________

1.High temperatures

2.High pressures

3.High energy densities

4.High volumetric ratio

Question:

The velocities of the blade angles can be found out using________

1.Mach number

2.Froude’s number

3.Velocity triangles

4.Reynolds number

Question:

The water from penstocks enters the _____ which is spiral in shape which the area of cross section of casing goes on decreasing gradually

1.guide wheel

2.draft tube

3.casing

4.runner

Question:

Voids are created due to______

1.Reaction ratio

2.Pressure ratio

3.Liquid free layers

4.Volumetric layers

Question:

Voids that implode near metal surface develops a_______

1.Drag force

2.Cyclic stress

3.Shock waves

4.Flow speed

Question:

What is the degree of reaction denoted as?

1.D

2.R

3.r

4.d

Question:

When a container containing a liquid is rotated, then due to centrifugal action, then which of these energies are changed?

1.Kinetic energy

2.Pressure energy

3.Potential energy

4.Energy due to viscous force

Question:

When the thicknesses of vanes are to be considered in the discharge of a turbine, what will be the area under consideration?

1.Pi*d – n*t

2.Pi*d – n*n*t

3.Pi*d – t*t

4.Pi*d *d– n*t

Question:

Which among the following velocities cannot be found using the velocity triangle?

1.Tangential

2.Whirl

3.Relative

4.Parabolic

Question:

Which of these options are best suited for the total energy change inside the runner per unit weight?

1.Degree of action

2.Degree of reaction

3.Turbulence

4.Efficiency of turbine

Question:

Which of these ratios are termed to be hydraulic efficiency?

1.Water power to delivered power

2.Delivered power to input power

3.Power lost to power delivered

4.Runner power to water power

Question:

___________ is a circular wheel on which a series of smooth, radial curved vanes are fixed.

1.Guide wheel

2. Runner

3.Casing

4.Draft tube

Question:

___________is a pipe of gradually increasing area used for discharging water from exit of the turbine to the tail race.

1.Casing

2.Guide mechanism

3.Draft tube

4.Runner

Question:

____________ consists of stationary circular wheel all around the runner of turbine

1.Casing

2.Guide mechanism

3.Runner

4.Drafting

Question:

____________and __________of radial flow reaction turbine are always full of water.

1.Casing and runner

2.Casing and penstocks

3.Runner and penstocks

4.Runner and draft tube

Question:

____________governs the flow of water entering the runner blades.

1.Casing

2.Guide vanes

3.Draft tube

4.Runner

Question:

_____________ allow the water to strike the vanes fixed on runner without shock at inlet

1.Casing

2.Guide vanes

3.Runner

4.Draft tube

Posted on by R4R Team

/Hydraulic Machines MCQs Set-3 MCQS HUB ,Sample Test,Sample questions

Question: _________ means the angle made by absolute velocity with the tangent on the wheel is 90 degrees and the component of whirl velocity is zero.

Question: An outward radial reaction turbine has ______

Question: At high pressure, the voids can generate ______

Question: Cavitation usually occurs due to the changes in ________

Question: Centrifugal head in Outward flow reaction turbine _____________

Question: Degree of reaction turbine is the ratio of?

Question: Degree of reactions are most commonly used in________

Question: Discharge in an outward flow reaction turbine ____________

Question: Discharge in outward flow reaction turbine ____________

Question: Discharge through a reaction flow reaction turbine is given by, Q = ______

Question: Discharge through radial flow reaction turbine is ______________

Question: For an actual reaction turbine, what should be the angle beta, such that the loss of kinetic energy at the outlet is to be minimum?

Question: Hydrodynamic cavitation is due to the process of _________

Question: If the water flows from inwards to outwards, the turbine is known as _____________

Question: In a Francis turbine, degree of reaction lies between _____

Question: In an outward radial flow reaction turbine the ratio of tangential velocity at inlet to the given velocity is ______

Question: In an outward radial flow reaction turbine the ratio of tangential wheel at inlet to given velocity of jet is known as ___________

Question: In case of gas turbines and compressors, degree of reaction is ________

Question: In general, reaction turbines consist of which types of energies?

Question: In Pelton turbine inlet velocity of jet is 85.83m/s, inlet and outlet whirl velocities be 85.83 and 0.143 and blade velocity be 38.62 then its hydraulic efficiency is ___________

Question: In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), where “k” is known as _______

Question: Main parts of radial flow reaction turbines are ______________

Question: Radial flow reaction turbines are those turbines in which water flows ____________

Question: Radial flow reaction turbines contain spiral casing which area ____________

Question: Runner blades are made up of _____________

Question: Speed control of Outward flow reaction turbine is _____________

Question: Tendency of wheel to race is predominant in____________turbine

Question: The casing of radial flow reaction turbine is made of spiral shape, so that water may enter the runner__________

Question: The energy available at inlet for outward reaction flow turbine is ____________

Question: The expression for hydraulic efficiency is given by

Question: The formation of vapour cavities is called _____

Question: The outward radial flow reaction turbine is a turbine in which direction of water flow is ___________

Question: The pressure at the exit of runner of reaction turbine is generally____________than atmospheric pressure

Question: The process of bubble generation leads to __________

Question: The velocities of the blade angles can be found out using________

Question: The water from penstocks enters the _____ which is spiral in shape which the area of cross section of casing goes on decreasing gradually

Question: Voids are created due to______

Question: Voids that implode near metal surface develops a_______

Question: What is the degree of reaction denoted as?

Question: When a container containing a liquid is rotated, then due to centrifugal action, then which of these energies are changed?

Question: When the thicknesses of vanes are to be considered in the discharge of a turbine, what will be the area under consideration?

Question: Which among the following velocities cannot be found using the velocity triangle?

Question: Which of these options are best suited for the total energy change inside the runner per unit weight?

Question: Which of these ratios are termed to be hydraulic efficiency?

Question: ___________ is a circular wheel on which a series of smooth, radial curved vanes are fixed.

Question: ___________is a pipe of gradually increasing area used for discharging water from exit of the turbine to the tail race.

Question: ____________ consists of stationary circular wheel all around the runner of turbine

Question: ____________and __________of radial flow reaction turbine are always full of water.

Question: ____________governs the flow of water entering the runner blades.

Question: _____________ allow the water to strike the vanes fixed on runner without shock at inlet

More MCQS

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Question:
_________ means the angle made by absolute velocity with the tangent on the wheel is 90 degrees and the component of whirl velocity is zero.

Question:
An outward radial reaction turbine has ______

Question:
At high pressure, the voids can generate ______

Question:
Cavitation usually occurs due to the changes in ________

Question:
Centrifugal head in Outward flow reaction turbine _____________

Question:
Degree of reaction turbine is the ratio of?

Question:
Degree of reactions are most commonly used in________

Question:
Discharge in an outward flow reaction turbine ____________

Question:
Discharge in outward flow reaction turbine ____________

Question:
Discharge through a reaction flow reaction turbine is given by, Q = ______

Question:
Discharge through radial flow reaction turbine is ______________

Question:
For an actual reaction turbine, what should be the angle beta, such that the loss of kinetic energy at the outlet is to be minimum?

Question:
Hydrodynamic cavitation is due to the process of _________

Question:
If the water flows from inwards to outwards, the turbine is known as _____________

Question:
In a Francis turbine, degree of reaction lies between _____

Question:
In an outward radial flow reaction turbine the ratio of tangential velocity at inlet to the given velocity is ______

Question:
In an outward radial flow reaction turbine the ratio of tangential wheel at inlet to given velocity of jet is known as ___________

Question:
In case of gas turbines and compressors, degree of reaction is ________

Question:
In general, reaction turbines consist of which types of energies?

Question:
In Pelton turbine inlet velocity of jet is 85.83m/s, inlet and outlet whirl velocities be 85.83 and 0.143 and blade velocity be 38.62 then its hydraulic efficiency is ___________

Question:
In the expression for overall efficiency of turbine, which is p/ (kgq*h), where “k” is known as _______

Question:
Main parts of radial flow reaction turbines are ______________

Question:
Radial flow reaction turbines are those turbines in which water flows ____________

Question:
Radial flow reaction turbines contain spiral casing which area ____________

Question:
Runner blades are made up of _____________

Question:
Speed control of Outward flow reaction turbine is _____________

Question:
Tendency of wheel to race is predominant in____________turbine

Question:
The casing of radial flow reaction turbine is made of spiral shape, so that water may enter the runner__________

Question:
The energy available at inlet for outward reaction flow turbine is ____________

Question:
The expression for hydraulic efficiency is given by

Question:
The formation of vapour cavities is called _____

Question:
The outward radial flow reaction turbine is a turbine in which direction of water flow is ___________

Question:
The pressure at the exit of runner of reaction turbine is generally____________than atmospheric pressure

Question:
The process of bubble generation leads to __________

Question:
The velocities of the blade angles can be found out using________

Question:
The water from penstocks enters the _____ which is spiral in shape which the area of cross section of casing goes on decreasing gradually

Question:
Voids are created due to______

Question:
Voids that implode near metal surface develops a_______

Question:
What is the degree of reaction denoted as?

Question:
When a container containing a liquid is rotated, then due to centrifugal action, then which of these energies are changed?

Question:
When the thicknesses of vanes are to be considered in the discharge of a turbine, what will be the area under consideration?

Question:
Which among the following velocities cannot be found using the velocity triangle?

Question:
Which of these options are best suited for the total energy change inside the runner per unit weight?

Question:
Which of these ratios are termed to be hydraulic efficiency?

Question:
___________ is a circular wheel on which a series of smooth, radial curved vanes are fixed.

Question:
___________is a pipe of gradually increasing area used for discharging water from exit of the turbine to the tail race.

Question:
____________ consists of stationary circular wheel all around the runner of turbine

Question:
__and of radial flow reaction turbine are always full of water.

Question:
____________governs the flow of water entering the runner blades.

Question:
_____________ allow the water to strike the vanes fixed on runner without shock at inlet