3. Different velocities in a centrifugal pump are determined by using
Correct : A. velocity triangle
4. Due to its impeller action, centrifugal pumps can cover a wide range of fluid pump applications.
Correct : A. true
5. With the increase in the input power, efficiency
Correct : B. decreases
6. What is unit of standard acceleration?
Correct : C. kg/m3
7. What does PSP stand for?
Correct : A. pump start procedure
8. Centrifugal pump is a
Correct : A. turbomachinery
9. Turbomachines work under
Correct : B. newtons second law
10. The main function of nozzle is to
Correct : B. pressure variations
11. The main function of centrifugal pumps are to
Correct : D. transfer energy
12. Centrifugal pumps transfer energy from
Correct : A. rotor to fluid
13. controlled by
Correct : B. gate
14. Centrifugal pumps are a sub class of dynamic axisymmetric work absorbing turbomachinery.
Correct : A. true
15. Turbines and compressors work with the gas, while centrifugal pump transfers energy.
Correct : A. true
16. Centrifugal pump is a turbomachinery.
Correct : D. fluid
17. Centrifugal pumps transport fluids by converting
Correct : A. kinetic energy to hydrodynamic energy
18. With the increase in load, Energy in the turbine
Correct : A. decreases
19. The rotational kinetic energy comes from
Correct : A. engine motor
20. When the balancing of the turbine is disturbed, we use
Correct : D. emergency governing
21. The fluid coming into the centrifugal pump is accelerated by
Correct : B. impeller
22. Reciprocating pump is a
Correct : B. positive displacement pump
23. What happens to the reciprocating pump when left untouched?
Correct : C. surface expansion
24. into the chamber
Correct : A. liquid
25. The cylinder of reciprocating cylinder is made up of
Correct : A. cast iron
26. The higher discharge valve line holds the discharge valve
Correct : B. closed
27. Reciprocating pumps are classified according to
Correct : B. number of cylinders
28. Simple hand operating pump is also called as
Correct : B. bicycle pump
29. Internal cavitation in reciprocating pumps occurs due to
Correct : C. shock waves
30. Bicycle pump generates more compression than volume displacement.
Correct : A. true
31. Power operated pump in which only one side engages the fluid displacement is called
Correct : B. single acting
32. Operation of reciprocating motion is done
Correct : C. double acting
33. has higher specific speed than the others?
Correct : A. axial flow
34. pump is also called as
Correct : C. centrifugal pump
35. Which pump is more suitable for an application where very high pressure is required to be developed at moderate discharge?
Correct : A. reciprocating pump
36. The process of filling the liquid into the suction pipe and pump casing up to the level of delivery valve is called as
Correct : C. priming
37. Most widely used sanitary pumps in the dairy industry are?
Correct : A. centrifugal pump
38. Main application of centrifugal pump is in which of the following?
Correct : A. low viscosity products
39. Main application of positive displacement pump is in which of the following?
Correct : C. gentle treatment with high viscosity
40. Which of the following pump suitable for handling AMF in the dairy industry?
Correct : D. peristaltic pumps
41. runner in a Francis turbine?
Correct : C. radial and then axial
42. Which of the following is true in case of flow of water before it enters the runner of a Francis Turbine?
Correct : D. available head is partly converted to pressure head and partly to velocity head
43. Which of the following profiles are used for guide vanes to ensure smooth flow without separation?
Correct : D. aerofoil
44. In which of the following type of runners the velocity of whirl at inlet is greater than the blade velocity?
Correct : B. slow runner
45. have the highest vane angle at inlet (β1 value)?
Correct : C. fast runner
46. In case of a Medium runner, tan (α1) CANNOT be given by (α1 = Guide vane angle at inlet)?
Correct : D. vw1 / u1
47. In the velocity diagrams for Francis turbine, which of the following velocity directions is along the blade curvature?
Correct : A. vr1
48. TOPIC 5.2 AXIAL, RADIAL AND MIXED FLOW TURBINES.
Correct : A. guide vane angle at inlet
49. In the figure shown below, which of the following type of runners has the blade curvature as shown in the above figure (The arrow denotes direction of blade motion)?
Correct : B. slow runner
50. category of
Correct : D. energy transfer machines
51. The electric power which is obtained from hydraulic energy
Correct : D. hydroelectric power
52. generating power
Correct : C. hydroelectric power
53. Pen stocks are made up of
Correct : A. steel
54. turbines, if vanes are fixed to hub of turbine
Correct : A. propeller turbine
55. The important type of axial flow reaction turbines are
Correct : D. propeller and kaplan turbines
56. Specific speed of reaction turbine is between?
Correct : B. 10 and 100
57. Impulse turbine is generally fitted at
Correct : B. above the tail race
58. Draft tube is also called
Correct : A. straight divergent tube
59. A draft tube helps in converting kinetic energy into
Correct : B. mechanical work
60. Most common application of the draft tube is
Correct : C. pump
61. Draft tube consists of conical diffuser with angles of
Correct : A. 10 deg
62. What is the purpose of a Draft tube?
Correct : A. to prevent flow separation
63. What is the maximum value of efficiency in a draft tube?
Correct : C. 90
64. Turbine that consists of draft tubes is called as
Correct : D. reaction turbine
65. Which of the following is a 50 percent reaction turbine?
Correct : A. parsons turbine
66. The simple elbow draft tube helps to cut down the cost of excavation.
Correct : A. true
67. The exit diameter for a simple elbow draft tube should be
Correct : A. large
68. Properties that do not affect a draft tube is
Correct : B. temperature
69. The other name for elbow with varying cross section tube is called
Correct : B. bent draft tube
70. type draft tube?
Correct : C. 60
71. The horizontal portion of the draft tube is usually bent to prevent entry of air from the exit end.
Correct : A. true
72. In nozzle governing, the flow rate of steam is regulated by
Correct : A. nozzles
73. The flow rate of steam is controlled by regulating the
Correct : B. pressure
74. What is primary objective of steam turbine governing?
Correct : A. maintain constant speed
75. governing?
Correct : B. controls flow rate
76. Which among the following control the flow rate?
Correct : A. valve
77. The advantage of nozzle governing is that no regulating pressure is applied.
Correct : A. true
78. During the steam turbine governing, what remains a constant?
Correct : A. speed of rotation
79. When do we apply by pass governing?
Correct : A. when turbine is overloaded
80. When bypass valve is opened to
Correct : D. increase the amount of fresh steam
81. What is the unit of steam rate?
Correct : C. kg/kwh
82. turbine
Correct : A. decreases
83. Combination governing involves usage of two or more governing.
Correct : A. true
84. increases beyond 110 percent, we use
Correct : D. emergency governing
85. Which one of the following is the unit of mass density?
Correct : A. kg = m3
86. Which one of the following is the dimension of mass density?
Correct : A. [m1 l-3 t0].
87. ] = [ML-3].
Correct : D. [m0 l0 t0].
88. ]/[M] = [M-1L3].
Correct : C. [ml-2 t-2].
89. and v2?
Correct : B. v1 < v2
90. A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific weight of the liquid will be
Correct : A. 6:5 kn = m3
91. A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific gravity of the liquid will be
Correct : B. 0.66
92. A beaker is filled with a liquid up to the mark of one litre and weighed. The weight of the liquid is found to be 6.5 N. The specific volume of the liquid will be
Correct : B. 1:5 l =kg
93. The physical principle behind the continuity equation is
Correct : A. mass conservation
94. To convert the non-conservative integral equation of mass conservation into the conservative integral form, which of these theorems is used?
Correct : D. gauss divergence theorem
95. The vertical intercept between EGL and HGL is equal to
Correct : C. kinetic head
96. For a diffuser, the vertical intercept between EGL and HGL
Correct : B. decreases
97. For a fully-developed pipe flow, how does the pressure vary with the length of the pipe?
Correct : A. linearly
98. The flow separation occurs when the fluid travels away from the
Correct : C. adverse pressure gradient
99. Eddy viscosity is a turbulent transfer of
Correct : C. momentum
100. With the boundary layer separation, displacement thickness