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Hydraulic Machines
Medium specific speea of turbine implies it is___________________?
Medium specific speea of turbine implies it is___________________?
A. propeller turbineB. Francis turbine
C. impulse turbine
D. any one of the above
E. none of the above
The specific speed of turbine is defined as the speed of a unit___________________?
The specific speed of turbine is defined as the speed of a unit___________________?
A. of such a size that it delivers unit dis-charge at unit head
B. of such a size that it delivers unit dis-charge at unit power
C. of such a size…
A turbine pump is basically a centrifugal pump equipped additionally with_________________?
A turbine pump is basically a centrifugal pump equipped additionally with_________________?
A. adjustable blades
B. backward curved bladesC. vaned diffusion casing
D. inlet guide blades
E. totally submerged operation facility…
In reaction turbine, draft tube is used_____________________?
In reaction turbine, draft tube is used_____________________?
A. to transport water downstream without eddiesB. to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section
C. for safety of turbine…
Impulse turbine is generally fitted______________________?
Impulse turbine is generally fitted______________________?
A. at the level of tail raceB. little above the tail race
C. slightly below the tail race
D. about 2.5 m above the tail race to avoid cavitation
E. about 2.5 m below the…
Francis turbine is best suited for_____________________?
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…
Francis, Kaplan and propeller turbines fall under the category of___________________?
Francis, Kaplan and propeller turbines fall under the category of___________________?
A. Impulse turbinesB. Reaction turbines
C. Axial flow turbines
D. Mixed flow turbines
E. Reaction-cum-impulse turbines…
The discharge through a reaction turbine with increase in unit speed____________________?
The discharge through a reaction turbine with increase in unit speed____________________?
A. increasesB. decreases
C. remains unaffected
D. first increases and then decreases
E. first decreases and then increases…
Specific speed for reaction turbines ranges from___________________?
Specific speed for reaction turbines ranges from___________________?
A. 0 to 4.5B. 10 to 100
C. 80 to 200
D. 250 to 300
E. none of the above
Which place in hydraulic turbine is most susceptible for cavitation __________________?
Which place in hydraulic turbine is most susceptible for cavitation __________________?
A. inlet of draft rube
B. blade inlet
C. guide blade
D. penstock
E. draft tube exit