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Free download in PDF Turbines Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
In cavitation, the material fails
[A]
by fatigue
[B]
due to creep
[C]
due to impact load
[D]
due to fracture
(22)
Cavitation occurs at
[A]
high pressure
[B]
low pressure
[C]
atmospheric pressure
[D]
none of the above
(23)
The function of draft tube is to
[A]
increase the pressure of the exiting fluid
[B]
increase the Kinetic energy of exiting fluid
[C]
allow the turbine to be set below tail water level
[D]
keep pressure at runner outlet above the atmospheric pressure
Answer: increase the pressure of the exiting fluid
(24)
In reaction turbines, the runner utilizes
[A]
Potential energy
[B]
Kinetic energy
[C]
Both kinetic energy and potential energy
[D]
None of the above
Answer: Both kinetic energy and potential energy
(25)
The specific speed of a turbine is
[A]
N√P / H^5/4
[B]
N√P / H^7/4
[C]
N√P / H^3/4
[D]
N√P / H^1/4
(26)
In mixed flow turbines, the water enters the blades ____ and comes out _____
[A]
axially, radially
[B]
axially, axially
[C]
radially, axially
[D]
radially, radially
Answer: radially, axially
(27)
If the blades of the axial flow turbine are fixed, these are called
[A]
Propeller turbine
[B]
Pelton turbine
[C]
Kaplan turbine
[D]
Francis turbine
Answer: Propeller turbine
(28)
Francis turbine is ______
[A]
Mixed flow
[B]
Tangential flow
[C]
Radial flow
[D]
Axial flow
(29)
Kaplan turbine is ______
[A]
Radial flow
[B]
Axial flow
[C]
Tangential flow
[D]
Mixed flow
(30)
Pelton turbine is ______
[A]
Tangential flow
[B]
Radial flow
[C]
Axial flow
[D]
Mixed flow
31
Which of the following is an impulse turbine?
[A]
Pelton turbine
[B]
Francis turbine
[C]
Kaplan turbine
[D]
Propeller turbine
32
Impulse turbine requires
[A]
High head and low discharge
[B]
Low head and high discharge
[C]
High head and high discharge
[D]
Low head and low discharge
Answer: High head and low discharge
33
Hydraulic energy is converted into another form of energy by hydraulic machines. What form of energy is that?
[A]
Elastic Energy
[B]
Electrical Energy
[C]
Nuclear Energy
[D]
Mechanical Energy
Answer: Mechanical Energy
34
Buckets and blades used in a turbine are used to:
[A]
To regenerate the power
[B]
Switch off the turbine
[C]
Alter the direction of water
[D]
To regulate the wind speed
Answer: Alter the direction of water
35
Which principle is used in Hydraulic Turbines?
[A]
Braggs law
[B]
Faraday law
[C]
Newton’s second law
[D]
Charles law
Answer: Newton’s second law
36
Which kind of turbines changes the pressure of the water entered through it?
[A]
Kinetic turbines
[B]
Reaction turbines
[C]
Impulse turbines
[D]
Reactive turbines
Answer: Reaction turbines
37
Hydraulic Machines fall under the category :
[A]
Roto-dynamic machinery
[B]
Condensers
[C]
Pulverizers
[D]
Kinetic machinery
Answer: Roto-dynamic machinery
38
Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft?
[A]
Mechanical Energy
[B]
Kinetic Energy
[C]
Potential Energy
[D]
Elastic Energy
Answer: Mechanical Energy
39
_______________is the electric power obtained from the energy of the water.
[A]
Hydroelectric power
[B]
Nuclear power
[C]
Roto dynamic power
[D]
Thermal power
Answer: Hydroelectric power
40
How many types of Reaction turbines are there?
[A]
7
[B]
5
[C]
6
[D]
none of the above
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