111. A reciprocating pump is also called a __________ displacement pump.
positive
negative
✅ The correct answer is option A.
Hydraulic Machines MCQs
112. Which of the following is not a reaction turbine?
Furneyron turbine
Jonval turbine
Thomson’s turbine
Pelton wheel
✅ The correct answer is option D.
113. By fitting an air vessel to the reciprocating pump, there is always a saving of work done and subsequently saving of power.The saving in case of a double acting reciprocating pump is
39.20%
48.80%
84.80%
88.40%
✅ The correct answer is option A.
114. A Francis turbine is used when the available head of water is
0 to 25 m
25 m to 250 m
above 250 m
none of these
✅ The correct answer is option B.
115. Slip of a reciprocating pump is defined as the
ratio of actual discharge to the theoretical discharge
sum of actual discharge and the theoretical discharge
difference of theoretical discharge and the actual discharge
product of theoretical discharge and the actual discharge
✅ The correct answer is option C.
117. The speed ratio of a Francis turbine is defined as the ratio of the theoretical jet velocity to the peripheral speed at inlet.
Yes
No
✅ The correct answer is option B.
118. The maximum number of jets, generally, employed in an impulse turbine without jet interference are
two
four
six
eight
✅ The correct answer is option C.
119. In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.
Agree
Disagree
✅ The correct answer is option B.
120. A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, Vr = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)
✅ The correct answer is option B.