logo

CuriousTab

CuriousTab

Discussion

Home ‣ Mechanical Engineering ‣ Hydraulic Machines Comments
  • Question

  • 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

  • Correct Answer
  • 0.6 to 0.9 

    • Hydraulic Machines problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. 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
    • 4. Manometric head is the actual head of water against which a centrifugal pump has to work.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 5. Slip of a reciprocating pump is negative, when

    • Options
    • A. suction pipe is short and pump is running at low speeds
    • B. delivery pipe is long and pump is running at high speeds
    • C. suction pipe is short and delivery pipe is long and the pump is running at low speeds
    • D. suction pipe is long and delivery pipe is short and the pump is running at high speeds
      • Discuss
    • 6. The power of a centrifugal pump working under constant head and discharge increases with the speed.

    • Options
    • A. True
    • B. False
      • Discuss
    • 7. Which of the following is not a reaction turbine?

    • Options
    • A. Furneyron turbine
    • B. Jonval turbine
    • C. Thomson's turbine
    • D. Pelton wheel
      • Discuss
    • 8. 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
    • 9. 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
    • 10. 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

    Comments

    There are no comments.
Enter a new Comment




Aptitude

Engineering

Programming

Reasoning

Links

Copyright ©CuriousTab. All rights reserved.