The net speed under which the turbine reaches its peak efficiency is called_________________?

Related Mcqs:

1. The net head under which the turbine reaches its peak efficiency at synchronous speed is called________________?

   A. design head
   B. rated head
   C. gross head
   D. operating head

2. The peak of a 4 hour flood hydrograph is 240 m3/sec . If the rainfall excess is 80 mm and base flow which is constant is 40 m3/sec, then the peak of 4-hours unit hydrograph will be__________________?

   A. 20 3/sec
   B. 25 m3/sec
   C. 30 m3/sec
   D. 35 m3/sec

3. The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called_________________?

   A. hygroscopic water
   B. equivalent moisture
   C. soil moisture deficiency
   D. pellicular water

4. Trap efficiency of a reservoir is a function of_______________?

   A. capacity/inflow ratio
   B. capacity/outflow ratio
   C. outflow/inflow ratio
   D. none of the above

5. As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at_____________?

   A. lower level
   B. higher level
   C. same level
   D. any of the above depending on the design

6. A hydroelectric scheme operating under a head of 80 m will be classified as_____________?

   A. low head scheme
   B. medium head scheme
   C. high head scheme
   D. none of the above

7. Under the same conditions, which of the following shapes of water surface will give the highest rate of evaporation ?

   A. flat water surface
   B. convex water surface
   C. concave water surface
   D. independent of shape of water surface

8. When surface of transpiration is submerged under water, then potential evapotranspiration is________________?

   A. much more than evapotranspiration
   B. much less than evapotranspiration
   C. equal to evapotranspiration
   D. equal to or less than evapotranspi-ration

9. The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, are________________?

   1) Water pressure
   2) Self weight
   3) Uplift
   4) Pressure due to earthquake
   The correct answer is

   A. Only (2)
   B. (1), (2) and (3)
   C. (1), (2) and (4)
   D. (1), (2), (3) and (4)

10. To determine the discharge at a section in a stream from its rating curve, the required data are_______________?

    1) slope of water surface at the section
    2) stage at the section
    3) current meter readings at the section
    The correct answer is?

    A. (1) and (2)
    B. (2) and (3)
    C. only (2)
    D. only (3)