611. Which of the following can be used to create a flow of gas, where no significant compression is required?
Reciprocating compressor
Blower
Axial flow compressor
Centrifugal compressor
✅ The correct answer is option B.
Fluid Mechanics MCQs
612. The maximum head that can be developed by a single impeller is __________ ft.
25
100
250-300
1000
✅ The correct answer is option C.
613. Which of the following is used for very accurate measurement of flow of gas at low velocity?
Pitot tube
Rotameter
Segmental orificemeter
Hot wire annemometer
✅ The correct answer is option D.
614. The unit of velocity head is
ft-lb/sec
ft-lb/ft³
ft-lbf/lb
ft-lbf/sec
✅ The correct answer is option C.
615. Cd for the orifice plate varies from
0.58 to 0.8
0.93 to 0.98
0.2 to 0.3
0.02 to 0.03
✅ The correct answer is option A.
616. Various efficiencies of a centrifugal pump are related as (where, ηm = mechanical efficiency ηv = volumetric efficiency. ηma = manometric efficiency ηo = overall efficiency)
ηma x ηm x ηv = ηo
ηm = ηv . ηma
ηma = ηm x ηv
ηv = ηm x ηma
✅ The correct answer is option B.
617. What is the pipe called which lifts water from a reservoir to a greater height than the initial level in the supply reservoir?
Penstock
Siphon
Tunnel
Pressure pipeline
✅ The correct answer is option B.
618. The equivalent diameter for flow through a rectangular duct of width B and height H is
HB/2(H + B)
HB/(H + B)
2HB/(H + B)
4HB/(H + B)
✅ The correct answer is option C.
619. __________ is an example of axial flow impeller.
Paddle
Turbine
Propeller
All of the above
✅ The correct answer is option C.
620. The line traced by a single fluid particle as it moves over a period of time is called __________ line.
Stream
Path
Equipotential
None of these
✅ The correct answer is option B.