Top 350+ Solved Turbine MCQ Questions Answer
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
Q. The hydraulic efficiency of Pelton turbine will be maximum when blade velocity is equal to
a. V/2
b. V/3
c. V/4
d. V/5
Q. In Pelton turbine is defined as ratio between power delivered to runner and power supplied at inlet of turbine
a. Mechanical efficiency
b. Volumetric efficiency
c. Hydraulic efficiency
d. Overall efficiency
Q. In Pelton turbine product of mechanical efficiency and hydraulic efficiency is known as
a. Mechanical efficiency
b. Volumetric efficiency
c. Hydraulic efficiency
d. Overall efficiency
Q. In Pelton is ratio of volume of water actually striking the runner and volume of water supplied to turbine?
a. Mechanical efficiency
b. Volumetric efficiency
c. Hydraulic efficiency
d. Overall efficiency
Q. In Pelton turbine the ratio of volume available at shaft of turbine and power supplied at the inlet of the turbine is
a. Mechanical efficiency
b. Volumetric efficiency
c. Hydraulic efficiency
d. Overall efficiency
Q. The expression for maximum hydraulic efficiency of Pelto turbine is given by
a. (1+cos k)/2 where k is outlet blade angle
b. (2+cos k)/2 where k is outlet blade angle
c. (3+cos k)/2 where k is outlet blade angle
d. (4+cos k)/2 where k is outlet blade angle
Q. In the expression for overall efficiency of turbine, which is p/ (k*g*q*h), where “k” is known as
a. Specific density of liquid
b. Density of liquid
c. Specific gravity of liquid
d. Volume of liquid