Engineering :: Hydraulics Machines
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91. |
Multi-stage centrifugal pumps are used to |
A. |
give high discharge |
B. |
produce high heads |
C. |
pump viscous fluids |
D. |
all of these |
Answer: Option B
Explanation:
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92. |
Which of the following statement is correct? |
A. |
The centrifugal pump is suitable for large discharge and smaller heads |
B. |
The centrifugal pump required less floor area and simple foundation as compared to reciprocating pump |
C. |
The efficiency of centrifugal pump is less as compared to reciprocating pump. |
D. |
all of the above |
Answer: Option D
Explanation:
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93. |
A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the |
A. |
kinetic head |
B. |
velocity head |
C. |
manometric head |
D. |
static head |
Answer: Option C
Explanation:
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94. |
A reciprocating pump is suitable for less discharge and higher heads. |
Answer: Option A
Explanation:
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95. |
A reciprocating pump is also called a |
Answer: Option A
Explanation:
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96. |
Slip of a reciprocating pump is defined as the |
A. |
ratio of actual discharge to the theoretical discharge |
B. |
sum of actual discharge and the theoretical discharge |
C. |
difference of theoretical discharge and the actual discharge |
D. |
product of theoretical discharge and the actual discharge |
Answer: Option C
Explanation:
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97. |
Slip of a reciprocating pump is negative, when |
A. |
suction pipe is short and pump is running at low speeds |
B. |
delivery pipe is long and pump is running at high speeds |
C. |
suction pipe is short and delivery pipe is long and the pump is running at low speeds |
D. |
suction pipe is long and delivery pipe is short and the pump is running at high speeds |
Answer: Option D
Explanation:
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98. |
Head developed by a centrifugal pump is |
A. |
proportional to diameter of impeller |
B. |
proportional to speed of impeller |
C. |
proportional to diameter and speed of impeller |
D. |
none of the above |
Answer: Option C
Explanation:
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99. |
In a mixed flow centrifugal pump, the flow through the impeller is a combination of radial and axial flows. |
Answer: Option A
Explanation:
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100. |
The air vessel, in a reciprocating pump, is a cast iron closed chamber having an opening at its base. |
Answer: Option A
Explanation:
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