When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?

Related Mcqs:

1. 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
   E. none of the above

2. 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
   E. none of the above

3. A turbine pump is basically a centrifugal pump equipped additionally with_________________?

   A. adjustable blades
   B. backward curved blades
   C. vaned diffusion casing
   D. inlet guide blades
   E. totally submerged operation facility

4. Head developed by a centrifugal pump depends on___________________?

   A. impeller diameter
   B. speed
   C. fluid density
   D. type of casing
   E. A. and B. above

5. 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
   E. none of the above

6. 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
   E. bent backward first and then forward

7. In a centrifugal pump, the liquid enters the pump__________________?

   A. at the top
   B. at the bottom
   C. at the center
   D. from sides
   E. none of the above

8. 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
   E. none of the above

9. For small discharge at high pressure, following pump is preferred_____________________?

   A. centrifugal
   B. axial flow
   C. mixed flow
   D. propeller
   E. reciprocating

10. Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of__________________?

    A. 39.2%
    B. 49.2%
    C. 68.8%
    D. 84.8%
    E. 91.6%.