Quiznetik

Fluid Mechanics (FM) | Set 4

1. The most common pump used for hydraulic fluid power application is

Correct : B. Gear pump

2. The change of angular momentum in a pump is equal to the

Correct : B. Sum of individual momentum

3. Conservation of angular momentum is described by

Correct : B. Euler’s equation

4. Gear pumps are mainly used in chemical installations because they pump

Correct : A. High viscosity fluids

5. The inlet passage of centrifugal pump is controlled by

Correct : A. Gate

6. Gear pumps are used to transport

Correct : D. Fluid View Answer

7. Vertical Centrifugal pumps are also called as

Correct : A. Cantilever pumps

8. The rotational kinetic energy comes from

Correct : A. Engine motor

9. Gear pumps are

Correct : A. Tangential flow pumps

10. The fluid gains while passing through the impeller.

Correct : D. Velocity and pressure View Answer

11. What is the shape of the diffuser in the centrifugal pump?

Correct : B. Dough nut

12. When the casing in a centrifugal pump decelerates the flow, what increases?

Correct : A. Pressure

13. The velocity imparted by the impeller is converted into

Correct : A. Pressure energy

14. The consequence of Newtons second law is

Correct : A. Conservation of angular momentum

15. What is a major advantage of centrifugal pump?

Correct : B. Simple in construction

16. ‘Ht’ means

Correct : C. Theory head pressure

17. Different velocities in a centrifugal pump are determined by using

Correct : A. Velocity triangle

18. With the increase in the input power, efficiency

Correct : B. Decreases

19. What does PSP stand for?

Correct : A. Pump start procedure

20. With the increase in the flow rate, efficiency

Correct : B. Increases

21. Pump efficiency is defined as the ratio of

Correct : C. Water horsepower to pump horsepower

22. The difference in the total head of the pump is called

Correct : A. Manometric head

23. The ratio of manometric head to the work head is called

Correct : B. Euler head

24. With the increase in energy head, efficiency

Correct : B. Increases

25. The head added by the pump is a sum of

Correct : B. Static lift

26. PHE stands for

Correct : A. Pump Hydraulic efficiency

27. With increase in power, the efficiency

Correct : A. Decreases

28. Which among the following is used in mineral industries?

Correct : C. Froth pumps

29. Vertical centrifugal pumps are also called as

Correct : C. Cantilever pumps

30. Vertical pump uses

Correct : B. Throttle bush

31. The most common application of vertical centrifugal pump is used in

Correct : A. Parts washer

32. What does BEP stand for?

Correct : A. Best efficiency point

33. The height of a column in a pump is called as

Correct : C. Static head

34. The centrifugal pump has varying flow depending on the

Correct : A. Pressure

35. What is purpose of froth in froth pumps?

Correct : A. Separates rich minerals

36. When froth blocks the pump, it leads to

Correct : D. Loss of prime View Answer

37. What affects volumetric efficiency of the pump?

Correct : A. Complex interactions

38. What is the purpose of inducer in a froth pump?

Correct : D. It breaks the bubbles View Answer

39. A multistage centrifugal pumps has more than two

Correct : B. Impellers

40. The impeller is mounted on a

Correct : D. Shaft View Answer

41. At each stage the fluid is directed

Correct : A. Towards the centre

42. If the cylinder is filled with fuel or air it is said to be

Correct : A. 100% efficient

43. SOH in a pump stands for_

Correct : A. Shut Off head

44. At higher pressures, the impeller is connected in

Correct : A. Series

45. When the flow output is higher, impellers are connected in

Correct : B. Parallel

46. The point at which piping system controls the flow rate is called

Correct : C. Operating point

47. What is the common application of multistage centrifugal pump?

Correct : B. Boiler feed water pump

48. A multistage centrifugal pump produces a pressure of

Correct : C. 21 MPa

49. All energy that is transferred from the fluid is derived from

Correct : B. Mechanical energy

50. The point at which the centrifugal pump operates at maximum efficiency is called

Correct : A. Duty point

51. What does TDH stand for?

Correct : A. Total dynamic head

52. The mechanical energy can be measured by

Correct : B. Isentropic compression

53. How many impellers does a multistage centrifugal pump have?

Correct : D. Two and more View Answer

54. The energy usage in pumping installation is determined by

Correct : A. Friction characteristics

55. Which among the following is a friction factor?

Correct : B. Darcy’s factor

56. What is the dimension for Darcy’s friction factor?

Correct : D. Dimensionless View Answer

57. Formation of bubbles in an impeller is called

Correct : A. Cavities

58. Centrifugal pump works by imparting

Correct : B. Kinetic energy

59. What is the full form of NPSH in a pump?

Correct : B. Net positive suction head

60. When the NPSH is low, it leads to

Correct : D. Cavitation View Answer

61. Wear of impeller can be worsened by

Correct : C. Suspended solenoids

62. Which pump is the most efficient centrifugal pump?

Correct : B. Reciprocating pump

63. Corrosion in the pump is developed due to

Correct : B. Fluid properties

64. What is the effect of cavitation in boat propeller?

Correct : C. It leads to fast spinning

65. The energy usage of a pump is determined by

Correct : B. Power required

66. For an oil field to have solid control, it needs

Correct : D. Centrifugal pumps View Answer

67. If we lower the temperature, the water pump cavitation

Correct : B. Decreases

68. Which among the following is not a centrifugal pump?

Correct : D. Energy pumps View Answer

69. Centrifugal pumps work under the same principle, but differ in their

Correct : B. Functions

70. If we raise the liquid level in the suction vessel, cavitation

Correct : B. Decreases

71. Magnetic coupled pumps are also called as

Correct : D. Drive pumps View Answer

72. When we change the pump, the cavitation

Correct : B. Decreases

73. If we reduce the motor rpm in an impeller, cavitation

Correct : B. Decreases

74. Decreasing the diameter of the eye of the impeller, cavitation

Correct : A. Increases

75. There will be leakage only if there is

Correct : D. Casing breakage View Answer

76. When a pump casing is filled with liquid before it is started, it is called as

Correct : B. Priming

77. The pump will become incapable of pumping in case of

Correct : D. Casing breakage View Answer

78. Priming is needed when impeller cannot impart enough

Correct : B. Energy

79. Priming performs response using

Correct : A. Stimulus

80. To avoid gas bounding, the pump is

Correct : C. Primed

81. Centrifugal pumps are located the level of source

Correct : A. Below

82. A pump that can evacuate air is called as

Correct : B. Self priming pumps

83. What does CPO stand for?

Correct : A. Centrifugal pump operation

84. Self priming pumps overshadow the function of

Correct : A. Self auxiliary device

85. What is necessary for self priming to take place?

Correct : B. Pump casing

86. Centrifugal pumps with an internal suction stage are called as

Correct : B. Self priming pumps

87. During normal working operation, the pump works like

Correct : A. Centrifugal pumps

88. What is purpose of vent valve in a pump?

Correct : D. To prevent siphon action View Answer

89. In hydraulic head, NPSH is used for the analysis of

Correct : D. Cavitation View Answer

90. NPSH is the difference between

Correct : A. Suction pressure and vapour pressure

91. What can NPSH be used to determine

Correct : C. Cavitation

92. The measure of how close the fluid is to the given point is called

Correct : A. Flashing

93. NPSH is relevant

Correct : A. Outside the pumps

94. With the increase in cavitation, the drag coefficient of the impeller

Correct : A. Increases

95. What is positive suction head?

Correct : C. Liquid level is above

96. NPSHr is determined by using

Correct : B. PumpLinx

97. If we use two lower capacity pumps in parallel, cavitation

Correct : B. Decreases

98. The characteristic curves of a centrifugal pump, plots required by the pump.

Correct : C. NPSH

99. Which among the following is not a characteristic curve for centrifugal pump?

Correct : A. Transfer speed vs Transfer pressure

100. The consequence of Newtons second law is

Correct : A. Conservation of angular momentum