TURBINES 1-20

Question 1

What is the primary function of a turbine?
a) To generate electricity
b) To convert kinetic energy into mechanical energy
c) To increase pressure in a fluid
d) To decrease pressure in a fluid

Answer 1

b) To convert kinetic energy into mechanical energy

Question 2

Which of the following is NOT a type of turbine?
a) Steam turbine
b) Wind turbine
c) Water turbine
d) Gear turbine

Answer 2

d) Gear turbine

Question 3

What is the primary advantage of using a steam
turbine for power generation?
a) High efficiency
b) Low initial cost
c) Ability to operate in harsh environments
d) Minimal maintenance requirements

Answer 3

a) High efficiency

Question 4

Which principle explains the operation of a
turbine?
a) Archimedes’ principle
b) Bernoulli’s principle
c) Pascal’s law
d) Newton’s third law of motion

Answer 4

d) Newton’s third law of motion

Question 5

In a gas turbine engine, what is the purpose of the
compressor?
a) To compress the fuel-air mixture
b) To generate thrust
c) To cool the engine
d) To drive the turbine

Answer 5

a) To compress the fuel-air mixture

Question 6

Which type of turbine is commonly used in
hydroelectric power plants?
a) Steam turbine
b) Wind turbine
c) Pelton turbine
d) Kaplan turbine

Answer 6

c) Pelton turbine

Question 7

What is the main advantage of using a Kaplan
turbine?
a) High efficiency at low heads
b) Ability to operate in variable flow conditions
c) Low maintenance requirements
d) Minimal environmental impact

Answer 7

b) Ability to operate in variable flow conditions

Question 8

What is the term for the area where energy is
extracted from the fluid in a turbine?
a) Diffuser
b) Nozzle
c) Rotor
d) Runner

Answer 8

d) Runner

Question 9

Which of the following statements is true about a
reaction turbine?
a) It operates at subsonic speeds
b) It requires a high head of fluid
c) It does not change the direction of fluid flow
d) It is more efficient than an impulse turbine

Answer 9

b) It requires a high head of fluid

Question 10

In a wind turbine, what converts the kinetic
energy of the wind into mechanical energy?
a) Rotor
b) Gearbox
c) Generator
d) Tower

Answer 10

a) Rotor

Question 11

Which type of turbine is commonly used in
aircraft propulsion?
a) Pelton turbine
b) Kaplan turbine
c) Wind turbine
d) Gas turbine

Answer 11

d) Gas turbine

Question 12

What is the primary disadvantage of using a
Pelton turbine?
a) Low efficiency
b) High maintenance requirements
c) Inability to operate at low heads
d) Susceptibility to cavitation

Answer 12

c) Inability to operate at low heads

Question 13

Which factor does NOT affect the efficiency of a
turbine?
a) Fluid density
b) Fluid viscosity
c) Turbine speed
d) Ambient temperature

Answer 13

d) Ambient temperature

Question 14

What is the term for the ratio of the actual power
output of a turbine to its theoretical power output?
a) Efficiency ratio
b) Performance ratio
c) Specific speed
d) Power coefficient

Answer 14

a) Efficiency ratio

Question 15

Which type of turbine is typically used in tidal
energy generation?
a) Pelton turbine
b) Kaplan turbine
c) Francis turbine
d) Crossflow turbine

Answer 15

d) Crossflow turbine

Question 16

What is the primary function of the stator in a
turbine?
a) To increase pressure
b) To decrease pressure
c) To direct fluid flow
d) To extract energy from the fluid

Answer 16

c) To direct fluid flow

Question 17

Which of the following is NOT a component of a
steam turbine?
a) Rotor
b) Stator
c) Nozzle
d) Diffuser

Answer 17

d) Diffuser

Question 18

What is the term for the energy loss in a turbine
due to friction and turbulence?
a) Viscous loss
b) Mechanical loss
c) Hydraulic loss
d) Entropic loss

Answer 18

c) Hydraulic loss

Question 19

Which type of turbine is commonly used in
geothermal power plants?
a) Pelton turbine
b) Kaplan turbine
c) Francis turbine
d) Impulse turbine

Answer 19

c) Francis turbine

Question 20

What is the main advantage of using a wind
turbine for electricity generation?
a) Low environmental impact
b) High efficiency
c) Continuous power generation
d) Ability to operate in all weather conditions

Answer 20

a) Low environmental impact