Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
Q. High specific speed of turbine implies that it is_
a. Francis turbine
b. Propeller turbine
c. Pelton turbine
d. Kaplan turbine
Q. Velocity triangles are used to analyze
a. Flow of water along blades of turbine
b. Measure discharge of flow
c. Angle of deflection of jet
d. Flow of water, measure of discharge, angle of deflection.
Q. In which of following turbine inlet and outlet blade velocities of vanes are equal?
a. Francis turbine
b. Kaplan turbine
c. Pelton turbine
d. Propeller turbine
Q. Tangential velocity of blade of Pelton wheel is proportional to
a. Speed of wheel
b. Angular velocity of wheel
c. Rpm of wheel
d. Speed, angular velocity, RPM of the wheel
Q. In which of following turbine inlet whirl velocity and inlet jet velocity are equal in magnitude?
a. Pelton turbine
b. Propeller turbine
c. Kaplan turbine
d. Francis turbine
Q. In Pelton wheel, if outlet velocity angle of jet is “acute angled” then outlet whirl velocity of jet is
a. x- component of V(r2) – blade velocity
b. x- component of V (r2) + blade velocity
c. Blade velocity – x- component of V (r2)
d. Zero
Q. In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is
a. x- component of V (r2) – blade velocity
b. x- component of V (r2) + blade velocity
c. Blade velocity – x- component of V (r2)
d. Zero
Q. In Pelton wheel, if outlet velocity angle of jet is “right angled” then outlet whirl velocity of jet is
a. x- component of V (r2) – blade velocity
b. x- component of V (r2) + blade velocity
c. Blade velocity – x- component of V (r2)
d. Zero
Q. In Pelton wheel, relative inlet velocity of jet with respect to velocity of vane is
a. Difference between inlet jet velocity and blade velocity
b. Sum of inlet jet velocity and blade velocity
c. Inlet jet velocity
d. Blade velocity
Q. In Pelton wheel if angle of deflection is not mentioned then we assume it as_
a. 150 degrees
b. 200 degrees
c. 165 degrees
d. 185 degrees
Q. The work done per unit weight of water jet striking runner blades of Pelton turbine is given by expression
a. [Vw1+Vw2] u/g
b. Vw1*u/g
c. [Vw1+Vw2]/g
d. [Vw1+Vw2]u
Q. In Pelton turbine the energy available at inlet of runner that is at outlet of nozzle is known as
a. Shaft power
b. Runner power
c. Output power
d. Water power
Q. In Pelton turbines the expression for power delivered at inlet to runner is given by
a. W*[Vw1+Vw2]u/g
b. W*[Vw1-Vw2]u/g
c. W*[Vw1+Vw2]u/g, W*[Vw1-Vw2]u/g
d. [Vw1+Vw2]u/g
Q. Calculate work done by jet per second on the runner where, discharge=0.7cubic meters/s, inlet and outlet whirl velocities be 23.77 and 2.94?
a. 200Kw
b. 150Kw
c. 187Kw
d. 250Kw
Q. 10.The expression for water power in Pelton wheel is
a. (P*g*Q*H) Kw
b. (g*Q*H*a) Kw
c. (g*Q) Kw
d. (g*H) Kw