logo

CuriousTab

CuriousTab

Discussion


Home Mechanical Engineering Hydraulic Machines Comments

  • Question
  • A Francis turbine is an outward flow reaction turbine.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • False 


  • Hydraulic Machines problems


    Search Results


    • 1. The head available at the inlet of the turbine is known as net or effective head.

    • Options
    • A. Correct
    • B. Incorrect
    • Discuss
    • 2. The Furneyron turbine is __________ reaction turbine.

    • Options
    • A. an axial flow
    • B. an inward flow
    • C. an outward flow
    • D. a mixed flow
    • Discuss
    • 3. The cavitation in a hydraulic machine is mainly due to

    • Options
    • A. low velocity
    • B. high velocity
    • C. low pressure
    • D. high pressure
    • Discuss
    • 4. The flow 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
    • 5. The Thomson's turbine is __________ reaction turbine.

    • Options
    • A. an axial flow
    • B. an inward flow
    • C. an outward flow
    • D. a mixed flow
    • Discuss
    • 6. Which of the following hydraulic unit is used for transmitting increased or decreased torque to the driven shaft?

    • Options
    • A. Hydraulic ram
    • B. Hydraulic intensifier
    • C. Hydraulic torque converter
    • D. Hydraulic accumulator
    • Discuss
    • 7. In an axial flow reaction turbine, the water flows __________ to the axis of the wheel.

    • Options
    • A. parallel
    • B. perpendicular
    • Discuss
    • 8. The overall efficiency for a Pelton wheel lies between

    • Options
    • A. 0.50 to 0.65
    • B. 0.65 to 0.75
    • C. 0.75 to 0.85
    • D. 0.85 to 0.90
    • Discuss
    • 9. The gross or total head of the turbine is the __________ of the water levels at the head race and tail race.

    • Options
    • A. sum
    • B. difference
    • C. product
    • Discuss
    • 10. Which of the following statement is correct?

    • Options
    • A. In an impulse turbine, the water impinges on the buckets with pressure energy.
    • B. In a reaction turbine, the water glides over the moving vanes with kinetic energy.
    • C. In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.
    • D. In a reaction turbine, the pressure of the flowing water increases after gliding over the vanes.
    • Discuss


    Comments

    There are no comments.

Enter a new Comment