Turbines multiple choice questions

 Turbines

1. Which principle is used in Hydraulic Turbines?
a) Faraday law
b) Newton’s second law
c) Charles law
d) Braggs law
Answer: Newton’s second law
2. In hydraulic turbines, inlet energy is greater than the outlet energy.
a) True
b) False
Answer: True
3. Hydraulic energy is converted into another form of energy by hydraulic machines. What form of energy is that?
a) Mechanical Energy
b) Electrical Energy
c) Nuclear Energy
d) Elastic Energy
Answer: Mechanical Energy
4. Buckets and blades used in a turbine are used to:
a) Alter the direction of water
b) Switch off the turbine
c) To regulate the wind speed
d) To regenerate the power
Answer: Alter the direction of water
5. _______________is the electric power obtained from the energy of the water.
a) Roto dynamic power
b) Thermal power
c) Nuclear power
d) Hydroelectric power
Answer: Hydroelectric power
6. Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft?
a) Mechanical Energy
b) Potential Energy
c) Elastic Energy
d) Kinetic Energy
Answer: Mechanical Energy
7. Hydraulic Machines fall under the category :
a) Pulverizers
b) Kinetic machinery
c) Condensers
d) Roto-dynamic machinery
Answer: Roto-dynamic machinery
8. Which kind of turbines changes the pressure of the water entered through it?
a) Reaction turbines
b) Impulse turbines
c) Reactive turbines
d) Kinetic turbines
Answer: Reaction turbines
9. Which type of turbine is used to change the velocity of the water through its flow?
a) Kinetic turbines
b) Axial flow turbines
c) Impulse turbines
d) Reaction turbines
Answer: Impulse turbines
10. Which type of turbine is a Francis Turbine?
a) Impulse Turbine
b) Screw Turbine
c) Reaction turbine
d) Turgo turbine
Answer: Reaction turbine
11. How many types of Reaction turbines are there?
a) 5
b) 4
c) 3
d) 9
Answer: 5
12. Turgo Turbine is an impulsive turbine.
a) True
b) False
Answer: True 
13. Which kind of turbine is a Fourneyron Turbine?
a) Inward flow turbine
b) Outward flow turbine
c) Mixed flow turbine
d) Radial flow turbine
Answer: Outward flow turbine
14. Maximum Number of jets, generally, employed in an impulse turbine without jet interference can be?
a) 2
b) 3
c) 4
d) 6
Answer: 6
15. The overall efficiency of a reaction turbine is the ratio of
a) Actual work available at the turbine to the energy imparted to the wheel
b) Work done on the wheel to the energy (or head of water) actually supplied to the turbine
c) Power produced by the turbine to the energy actually supplied by the turbine
d) Actual work available at the turbine to energy imparted to the wheel
Answer: Actual work available at the turbine to the energy imparted to the wheel
16. In a reaction turbine, the draft tube is used to _________
a) To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race
b) To prevent air to enter the turbine
c) To increase pressure energy of water
d) To transport water to downstream
Answer: To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race
17. In reaction turbine hydraulic efficiency is______________
a) Ratio of actual work at the turbine to the energy imparted to the wheel
b) Ratio of work done on the wheel to energy that is supplied to the turbine
c) Ratio of power produced by the turbine to the energy actually supplied by the turbine
d) Ratio of Work done on the wheel to the energy (or head of water) actually supplied to the turbine
Answer: Ratio of work done on the wheel to energy that is supplied to the turbine
18. Consider an inward flow reaction turbine, here, water _______
a) Flows parallel to the axis of the wheel
b) Enters the wheel at the outer periphery and then flows towards the centre of the wheel
c) Flow is partly radial and partly axial
d) Enters at the centre of the wheel and then flows towards the outer periphery of the wheel
Answer: Enters the wheel at the outer periphery and then flows towards the centre of the wheel
19. Into how many types can you classify turbines on basis of head at inlet?
a) 3
b) 4
c) 6
d) 5
Answer: 3
20. Which kind of turbine is a Pelton Wheel turbine?
a) Tangential flow turbine
b) Radial flow turbine
c) Outward flow turbine
d) Inward flow turbine
Answer: Tangential flow turbine
21. IN what type of turbine water enters in radial direction and leaves axial direction?
a) Tangential flow turbine
b) Axial flow turbine
c) Outward flow turbine
d) Mixed flow turbine
Answer: Mixed flow turbine
22. Into how many types can you classify radial flow turbines?
a) 4
b) 3
c) 6
d) 2
Answer: 2
23. How many types of turbines can you classify on the basis of direction of flow through runner?
a) 6
b) 3
c) 4
d) 7
Answer: 4
24. The working of which of the following hydraulic units is based on Pascal’s law?
a) Air lift pump
b) Hydraulic coupling
c) Hydraulic press
d) Jet pump
Answer: Hydraulic press
25. Which type of turbine is a Francis Turbine?
a) Reaction turbine
b) Impulse Turbine
c) Screw Turbine
d) Turgo turbine
Answer: Reaction turbine