D all of the above b shear stress and angular deformation

1. 
   C 13.6
   
2. 
   D all of the above
   
3. 
   B shear stress and angular deformation
   
4. 
   B fricitionless and incompressible
   
5. 
   B venturimeter
   
6. 
   B internal forces and viscous forces
   
7. 
   B never above the energy grade line
   
8. 
   (duration curve) A flow duration curve of a stream is a plot of discharge against the percent of time the flow was equalled or exceeded. We can study the stream flow variability over a water year by flow duration curves.
   
9. 
   (main components of hydroelectric power plant) Forebay – is like a warehouse that stores water before going into intake chamber. Intake structure – receives water from forebay and sends it to penstock. Penstock – are large slope pipes which carries water from intake structure and sends to turbines. In the top of penstock stays surge chambers for pressure control. After penstock, water goes to hydraulic turbines which converts hydraulic energy to mechanical energy and again converts it to electrical energy.
   
10. 
    (rainfall-runoff process) Runoff is generated by rainstorms and its occurrence and quantity are dependent on the characteristics of the rainfall event, i.e. intensity, duration and distribution.
    

Test
B (javob: reservoir, pressure tunnel, surge shaft, penstock…….)

B (pelton turbines are used for with low discharges and high difference head)
B (supercritical greater than critical)
C (=2l/a)


Duration curve of a stream is is a graphic of discharge opposite to percent of time the flow exceeds.