If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge_____________________?
A. Same quantity of liquid
B. 0.75 q
C. Q/0.75
D. 1.5 q
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When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?
A. Horizontal
B. Nearly horizontal
C. Steep
D. First rise and then fall
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The efficiency of a centrifugal pump is maximum when its blades are__________________?
A. Straight
B. Bent forward
C. Bent backward
D. Bent forward first and then backward
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Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?
A. High initial and maintenance cost
B. Lower discharge
C. Lower speed of operation
D. Necessity of air vessel
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In a centrifugal pump casing, the flow of water leaving the_______________?
A. radial
B. radial
C. centrifugal
D. rectilinear
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Head developed by a centrifugal pump depends on___________________?
A. impeller diameter
B. speed
C. fluid density
D. type of casing
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Axial flow pump is started with its delivery valve________________?
A. Kept fully closed
B. Kept fully open
C. Irrespective of any position
D. Kept 50% open
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In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?
A. Designing new impeller
B. Trimming the impeller size to the required size by machining
C. Not possible
D. Some other alterations in the impeller
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Multistage centrifugal pumps are used to obtain___________________?
A. High discharge
B. High head
C. Pumping of viscous fluids
D. High head and high discharge
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When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?
A. Horizontal
B. Nearly horizontal
C. Steep
D. First rise and then fall
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Word of the Day
27 Sep
Undesirable
not wanted or desirable because harmful, objectionable, or unpleasant.
غیر مطلوب، ناروا، نامناسب

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