Top 350+ Solved Turbine MCQ Questions Answer
Q. The main difference between reaction turbine and outward radial flow reaction turbine is water flows
a. Radial direction
b. Radially inward
c. Radially outward
d. Axial direction
Q. In outward radial flow reaction turbine the ratio of tangential wheel at inlet to given velocity of jet is known as
a. Speed ratio
b. Flow ratio
c. Discharge
d. Radial discharge
Q. Conical diffuser draft tube is also called
a. Straight divergent tube
b. Simple elbow tube
c. Thermal tube
d. Elbow tube with varying cross section
Q. Turbine that consists of moving nozzles and with fixed nozzles is called as
a. Impulse turbine
b. Curtis turbine
c. Rateau turbine
d. Reaction turbine
Q. An example of reaction turbine is_
a. Parsons turbine
b. Curtis turbine
c. Rateau turbine
d. Pelton wheel
Q. When we arrange turbine blades in multiple stages it is called
a. Pressure change
b. Vane deviation
c. Compounding
d. Pressure ratio
Q. Compounding is needed to
a. Increase Pressure
b. Decrease temperature
c. Change volume
d. Increase efficiency
Q. Which among the following is not a type of compounding?
a. Pressure
b. Temperature
c. Pressure velocity
d. Velocity
Q. Newtons second law describes the transfer of energy through impulse turbines.
a. True
b. False
c. none
d. none
Q. Inner radial flow extracts energy from
a. Turbine blades
b. Moving fluid
c. Pressure change
d. Temperature increase
Q. Reaction turbines develop torque by reacting to the gas or fluids pressure or mass.
a. True
b. False
c. none
d. none
Q. What is the water flow direction in the runner in a Francis turbine?
a. Axial and then tangential
b. Tangential and then axial
c. Radial and then axial
d. Axial and then radial
Q. Which of the following is true in case of flow of water before it enters the runner of a Francis Turbine?
a. Available head is entirely converted to velocity head
b. Available head is entire converted to pressure head
c. Available head is neither converted to pressure head nor velocity head
d. Available head is partly converted to pressure head and partly to velocity head
Q. Why does the cross sectional area of the Spiral casing gradually decrease along the circumference of the Francis turbine from the entrance to the tip?
a. To ensure constant velocity of water during runner entry
b. To prevent loss of efficiency of the turbine due to impulsive forces caused by extra area
c. To prevent leakage from the turbine
d. To reduce material costs in order to make the turbine more economical