Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. Impeller in a motor is used to
a. Change temperatures
b. Change Pressure
c. Kinetic energy change
d. Change density
Q. Hydraulic head is also called as
a. Pressure head
b. Density head
c. Kinetic head
d. Piezometric head
Q. Specific speed of a Pelton wheel with single jet is
a. 8.5 to 30
b. 30 to 51
c. 51 to 225
d. 230 to 500
Q. Specific speed is an index used to predict
a. Head race distance
b. Tail race distance
c. Tank dimensions
d. Turbine performance
Q. Specific speed of a Pelton wheel with multiple jets is
a. 8.5 to 30
b. 30 to 51
c. 51 to 225
d. 230 to 500
Q. Specific speed less than 500 are called
a. Positive displacement pumps
b. Negative displacement pumps
c. Draft tubes
d. Tanks
Q. With the increase in specific speeds,
a. Head race distance increases
b. Tail race distance increases
c. Tank dimensions increases
d. Diameters of impeller increases
Q. Specific speed is used to predict desired pump or turbine performance.
a. True
b. False
c. none
d. none
Q. Once we know the desired functions of the specific speed, it is easier to calculate its components units.
a. True
b. False
c. none
d. none
Q. Which among the following is not a unit quantity of turbine?
a. Unit speed
b. Unit discharge
c. Unit power
d. Unit temperature
Q. What does DMU stand for?
a. Density matter usage
b. Direct material usage
c. Density material usage
d. Depth matter usage
Q. Unit speed is the speed of the turbine operating under_
a. One-meter head
b. Pressure head
c. Volumetric head
d. Draft tube