Top 1000+ Solved Fluid Mechanics (FM) MCQ Questions Answer
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
Q. Design of Pelton wheel means the following data is to be determined.
a. Width of buckets
b. Depth of buckets
c. Number of buckets
d. All of the mentioned
Q. The width of buckets of Pelton wheel is
a. 2 times diameter of jet
b. 3 times diameter of jet
c. 4 times diameter of jet
d. 5 times diameter of jet
Q. The depth of buckets of Pelton wheel
a. 1.2 times diameter of jet
b. 1.3 times diameter of jet
c. 1.4 times diameter of jet
d. 1.5 times diameter of jet
Q. The ratio of pitch diameter of Pelton wheel to diameter of jet is known as
a. Speed ratio
b. Jet ratio
c. Velocity ratio
d. Co-efficient of velocity
Q. Find the diameter of jet D, if jet ratio m and diameter of jet d are given as 10 and 125mm.
a. 1.25 meters
b. 1.5 meters
c. 2 meters
d. 1.2 meters
Q. The number of buckets of Pelton wheel is 25 and diameter of runner is 1.5meters then calculate diameter of jet is
a. 80mm
b. 85mm
c. 90mm
d. 82mm
Q. Number of buckets on runner of Pelton wheel is given by expression? (D-diameter of runner and d- diameter of jet)
a. 15 + D/2d
b. 15 + 3D/2d
c. 15 + D/d
d. 15 + 2D/d