logo

CuriousTab

CuriousTab

Discussion

Home ‣ Mechanical Engineering ‣ Hydraulic Machines Comments
  • Question

  • The power of a centrifugal pump working under constant head and discharge increases with the speed.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 

    • Hydraulic Machines problems

    Search Results

    • 1. The speed ratio in case of Francis turbine varies from

    • Options
    • A. 0.15 to 0.3
    • B. 0.4 to 0.5
    • C. 0.6 to 0.9
    • D. 1 to 1.5
      • Discuss
    • 2. The centrifugal pump preferred for a specific speed between 80 to 160 r.p.m. is

    • Options
    • A. slow speed with radial flow at outlet
    • B. medium speed with radial flow at outlet
    • C. high speed with radial flow at outlet
    • D. high speed with mixed flow at outlet
      • Discuss
    • 3. Which of the following pump is successfully used for lifting water to the turbines?

    • Options
    • A. Centrifugal pump
    • B. Reciprocating pump
    • C. Jet pump
    • D. Air lift pump
      • Discuss
    • 4. The force exerted by a jet of water impinging normally on a plate which due to the impact of jet, moves in the direction of jet with a velocity v is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 5. Manometric head is the actual head of water against which a centrifugal pump has to work.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 6. Which of the following is not a reaction turbine?

    • Options
    • A. Furneyron turbine
    • B. Jonval turbine
    • C. Thomson's turbine
    • D. Pelton wheel
      • Discuss
    • 7. The cavitation in a hydraulic machine

    • Options
    • A. causes noise and vibration of various parts
    • B. reduces the discharge of a turbine
    • C. causes sudden drop in power output and efficiency
    • D. all of the above
      • Discuss
    • 8. The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is

    • Options
    • A. slow speed pump with radial flow at outlet
    • B. medium speed pump with radial flow at outlet
    • C. high speed pump with radial flow at outlet
    • D. high speed pump with axial flow at outlet
      • Discuss
    • 9. The efficiency of jet propulsion for a ship with inlet orifices at right angles to the direction of motion of ship is given by

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 10. A jet of water is striking at the centre of a curved vane moving with a uniform velocity in the direction of jet. For the maximum efficiency, the vane velocity is __________ of the jet velocity

    • Options
    • A. one-half
    • B. one-third
    • C. two-third
    • D. three-fourth
      • Discuss

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.