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71. A turbine pump is basically a centrifugal pump equipped additionally with_________________?
A. adjustable blades
B. backward curved blades
C. vaned diffusion casing
D. inlet guide blades
E. totally submerged operation facility
72. 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 that it requires unit power per unit head
D. of such a size that it produces unit horse power with unit head
E. none of the above
73. Medium specific speea of turbine implies it is___________________?
A. propeller turbine
B. Francis turbine
C. impulse turbine
D. any one of the above
E. none of the above
74. Runaway speed of a hydraulic turbine is_________________?
A. full load speed
B. the speed at which turbine runner will be damaged
C. the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open
D. the speed corresponding to maximum overload permissible
E. none of the above.
75. Low specific speed of turbine implies it is__________________?
A. propeller turbine
B. Francis turbine
C. impulse turbine
D. any one of the above
E. none of the above
76. High 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
77. For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred_________________?
A. centrifugal
B. axial flow
C. reciprocating
D. mixed flow
E. none of the above
78. In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?
A. rectilinear flow
B. radial flow
C. free vortex motion
D. forced vortex
E. none of the above
79. Atomic number of an element in the periodic table represents the numbers of_________________?
A. protons in the nucleus
B. electrons in me nucleus
C. neutrons in the nucleus
D. electrons in the atom
E. neutrons in the atom
80. Which is not identical for an atom and an isotope_________________?
A. mass number
B. atomic number
C. chemical properties
D. position in periodic table
E. all of the above