in a centrifugal pump .. when we close the delivery valve partially .. does this increase the pressure before or after the valve .. and why ??

4 Answers  

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Name the only five parts of lathe machine?

0 Answers  

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what are the advantages of PID controllers compared with those of a PLC

2 Answers   Bhel,

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how can u calculate efficiency of one welder in piping work.if we give support staff for his work.

0 Answers  

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Sir i am appearing for the section engineer post examination of railway recruitment board.Can you please send me the previous question papers from 2001 to till date.

0 Answers  

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difference between aerofoil meter and orifice meter 

0 Answers   Cethar Energy,

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Hi, How I can calculate mass flow rate for an axial fan with diameter "400mm" and speed 1500RPM? thx

1 Answers   Bharat Gears,

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Identify the parts of steam turbine

0 Answers   ABC Inc, RRB, Siemens,

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The range of mechanical efficiency for automobile engines is.................... A.70-80% B.90-100%

2 Answers  

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What was the spinning jenny?

0 Answers  

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Why R12 refrigerant is restricted to atmosphere?

2 Answers  

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what is the difference in Gas Welding and Gas Cutting?? Second Question is for Huge Casting which method is used??

0 Answers   Bhel,

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