Reaction turbines are used for____________________?

Related Mcqs:

1. Specific speed for reaction turbines ranges from___________________?

   A. 0 to 4.5
   B. 10 to 100
   C. 80 to 200
   D. 250 to 300
   E. none of the above

2. In axial flow fans and turbines, fluid enters and leaves as follows________________?

   A. radially, axially
   B. axially, radially
   C. axially, axially
   D. radially, radially
   E. combination of axial and radial

3. Francis, Kaplan and propeller turbines fall under the category of___________________?

   A. Impulse turbines
   B. Reaction turbines
   C. Axial flow turbines
   D. Mixed flow turbines
   E. Reaction-cum-impulse turbines

4. The hydraulic turbines are also known as : ___________?

   A. steam turbines
   B. water turbines
   C. combustion turbines
   D. Gas turbines

   Submitted by: Faheem Zaman Dhaunroo

5. Hydraulic accumulator is used for____________________?

   A. accumulating oil
   B. supplying large quantities of oil for very short duration
   C. generally high pressures to operate hydraulic machines
   D. supplying energy when main supply fails
   E. accumulating hydraulic energy

6. The discharge through a reaction turbine with increase in unit speed____________________?

   A. increases
   B. decreases
   C. remains unaffected
   D. first increases and then decreases
   E. first decreases and then increases

7. In reaction turbine, draft tube is used_____________________?

   A. to transport water downstream without eddies
   B. to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
   C. for safety of turbine
   D. to increase flow rate
   E. none of the above

8. In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?

   A. designing new impeller
   B. trimming the impeller size to the required size by machining
   C. not possible
   D. some other alterations in the impeller
   E. none of the above

9. Low 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

10. Francis turbine is best suited for_____________________?

    A. medium head application from 24 to 180 m
    B. low head installation up to 30 m
    C. high head installation above 180 m
    D. all types of heads
    E. none of the above