Mechanical Engineering MCQs

2075 MCQs  (Page 20 of 208)

Attempt Mechanical Engineering Mcqs Quiz
Head developed by a centrifugal pump depends on___________________?
A. impeller diameter
B. speed
C. fluid density
D. type of casing
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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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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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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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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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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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The optimum value of vane exit angle for a centrifugal pump impeller is_________________?
A. 10-15°
B. 20-25°
C. 30-40°
D. 50-60°
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In centrifugal pumps, maximum efficiency is obtained when the blades are_________________?
A. Straight
B. Bent forward
C. Bent backward
D. Radial
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In a centrifugal pump, the liquid enters the pump__________________?
A. At the top
B. At the bottom
C. At the center
D. From sides
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Low 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
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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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