Mechanical Engineering MCQs [Set 3]

21. Motion of a liquid in a volute casing of a centrifugal pump is an example of
(a) rotational flow
(b) radial
(c) forced spiral vortex flow
(d) forced cylindrical vortex flow
(e) spiral vortex flow.

22. For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred
(a) centrifugal
(b) axial flow
(c) reciprocating
(d) mixed flow
(e) none of the above.

23. Medium specific speed of a pump implies it is
(a) centrifugal pump
(b) mixed flow pump
(c) axial flow pump
(d) any one of the above
(e) none of the above.

24. High specific speed of a pump implies it is
(a) centrifugal pump
(b) mixed flow pump
(c) axial flow pump
(d) any one of the above
(e) none of the above.

25. Indicator diagram of a reciprocating pump is a graph between
(a) flow vs swept volume
(b) pressure in cylinder vs swept volume
(c) flow vs speed
(d) pressure vs speed
(e) swept volume vs speed.

26. Low specific speed of turbine implies it is
(a) propeller turbine
(b) Francis turbine
(c) impulse turbine
(d) any one of the above
(e) none of the above.

27. Any change in load is adjusted by adjusting following parameter on turbine
(a) net head
(b) absolute velocity
(c) blade velocity
(d) flow
(e) relative velocity of flow at inlet.

28. Runaway speed of a hydraulic turbine is
(a) full load speed
(b) the speed at which turbine runner will be damaged
(c) the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
(d) the speed corresponding to maximum overload permissible
(e) none of the above.

29. The maximum number of jets generally employed in impulse turbine without jet interference is
(a) 4
(b) 6
(c) 8
(d) 12
(e) 16.

30. Medium specific speea of turbine implies it is
(a) propeller turbine
(b) Francis turbine
(c) impulse turbine
(d) any one of the above
(e) none of the above

Updated: 29th June 2019 — 8:31 PM

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