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WorksheetsRe Opened FMFM OBT III 2023-24
Total questions: 23
Worksheet time: 14mins
Name of Student:
Class & Div
S.Y.(A)
S.Y(B)
Roll Number :
Centrifugal pumps transfer energy from _______
Rotor to fluid
Fluid to rotor
Draft to rotor
Rotor to draft
What is the type of turbine ?
Kaplan
Francis
Pelton wheel
What is the type of turbine ?
Kaplan
Francis
Pelton wheel
_____________ is defined as ratio between power delivered to runner and power supplied at inlet of turbine.
Mechanical efficiency
Volumetric efficiency
Hydraulic efficiency
Overall efficiency
The ratio of power at the shaft of turbine and power delivered by water to runner is known as?
Mechanical efficiency
Volumetric efficiency
Hydraulic efficiency
Overall efficiency
When a pump casing is filled with liquid before it is started, it is called as------------
Efficiency of pump
Priming
Suction head
Net positive suction head
In which type of turbine, the runner needs to be run full of water?
Impulse turbine
Reaction turbine
Both a. and b.
None of the above
Which of following is inward radial flow reaction turbine?
Pelton wheel
Francis turbine
Axial turbine
Kaplan turbine
In Inward radial flow reaction turbine which is not required?
Runner
Air tight casing
Guide vanes
Breaking jet
For which of the following values of available heads may Kaplan turbine be used?
a) 250 m
b) 100 m
c) 80 m
d) 50 m
In this type of low head turbine, the guide vanes are fixed to the hub of the turbine and are not adjustable. What is this type of turbine called?
a) Francis turbine
b) Kaplan Turbine
c) Propeller Turbine
d) Pelton turbine
Turbine that consists of draft tubes is called as__________
a) Impulse turbine
b) Curtis turbine
c) Rateau turbine
d) Reaction turbine
Pelton Turbine is a
Low head turbine
Medium head turbine
High head turbine
All of the above
How is the shape of the bucket of Pelton turbine
Circular Shaped
Double Hemi-sperical shape
Semi-circular
Conical Shape
The PUMP is used to convert .........................
Hy. E-------> M.E
M.E-------> Hy.E
T.E-------> M.E
Hy. E-------> T.E
In outlet velocity triangle of Pelton Wheel, Cos ϕ = ?
(u2 - Vw2)/ Vr2
(u2 + Vw2)/ Vr2
Vr2 / (u2 - Vw2)
Vr2 / (u2 + Vw2)
Jet ratio m is the ratio of
Wheel diameter to jet diameter
jet diameter to wheel diameter
wheel velocity to jet velocity
jet velocity to wheel velocity
The number of Buckets of the Pelton wheel is obtained by the equation
Z = 15 + (2D/d)
Z = 15 + (2d/D)
Z = 15 + (D/2d)
Z = 15 + (d/2D)
Governing main purpose is
To stop flow of water
To run servo motor
To increase in velocity
To maintain constant speed of a turbine
Centrifugal pumps can also develop a phenomenon called “cavitation”.
True
False
