Important Questions - Unit V : Pumps

 1) Explain with a neat sketch the working of a single acting reciprocating pump. Also obtain the expression for weight of water delivered by the pump per second. 

2) Explain the working principle with the main parts of centrifugal pump. 

3) Explain the working principle of a reciprocating pump with a neat sketch. 

4) Explain about the performance characteristics of centrifugal pumps.  

5) Discuss the working of lobe and vane pumps. 

6) With a neat sketch explain the construction & working of a centrifugal pump.

7) Discuss on the cascade theory. 

8) Explain the various types of rotary pumps with its construction details & its applications. 

9) Explain in detail about the concept of pressure vessels with its characteristics. 

10) Describe multistage pump with impeller in series.

11) Describe impellers in parallel.

12) Define cavitation. What one the effects of cavitation?

13) Explain briefly the following efficiencies of a centrifugal pump.

(i) Manometric efficiency

(ii) Volumetric efficiency

14) Define indicator diagram. Prove that the workdone by the pump is proportional to the area of indicator diagram.

15) Describe the working principle of a gear pump and vane pumps 

16) Write a short note on following types of rotary pumps.

(i) Internal gear pump

(ii) External gear pump 

(iii) Vane pumps

(iv) Rotary pumps

17) Explain in detail the working principle and construction of rotary pump with heat sketch.

18) Calculate the work saved by sighing an air vessel for a double acting single cylinder reciprocating pump.

19) Describe in detail the construction of the centrifugal pump, function of the various parts, velocity triangles & the performance curves.

20) Obtain expression for work done by impeller of a centrifugal pump in water/sec per unit weight of water.

21) Determine minimum speed for starting a centrifugal pump. 22) Explain working principle of single & double acting reciprocating pump with heat diagram in detail. Also explain the effects of inertia pressure & friction on performance at pump using without air vessel.