Turbines Quiz | Turbines Objective Type Questions and Answers

Questions
21 In cavitation, the material fails
A by fatigue
B due to creep
C due to impact load
D due to fracture

Answer: by fatigue
22 Cavitation occurs at
A high pressure
B low pressure
C atmospheric pressure
D none of the above

Answer: high pressure
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

Answer: N√P / H^5/4
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

Answer: Mixed flow
29 Kaplan turbine is ______
A Radial flow
B Axial flow
C Tangential flow
D Mixed flow

Answer: Radial flow
30 Pelton turbine is ______
A Tangential flow
B Radial flow
C Axial flow
D Mixed flow

Answer: Tangential flow
31 Which of the following is an impulse turbine?
A Pelton turbine
B Francis turbine
C Kaplan turbine
D Propeller turbine

Answer: Pelton 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

Answer: 5
junior administrative assistant jaa test series