1) Any pipe line working fluid may water / steam on it one manual isolation valve suppose one side of valve 6 kg/ cm^2 pressure (i.e. up stream) and other side is “ 0” kg/ cm^2 pressure(i.e. down stream) . So how much Tourqe required for opening the valve in terms of Newton force wheather normal man can open this valve. (for reference pipe nominal bore is 100 NB )

0 Answers   Ansaldo,

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Two pumps connected in series , what will be the shape of QH curve ?. What will be the shape if they are in parallel.

1 Answers   Ferrari, IGCAR,

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What is the difference between hydraulic oil and engine oil?

0 Answers  

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What is cutt off ratio in IC Engines.give proper defination.

5 Answers   Essar, Hyundai, Jindal Steel and Power, L&T,

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You have to design a machine component. For what type of failure (ductile or brittle) you will design?

9 Answers   DRDO,

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hi gys.. I too want sample papers of hpcl(mech) please help me......plz..... mail me dnaik2006@gmail.com

2 Answers  

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Why iso-octane is chosen as reference fuel for s.i. Engines and allotted 100 value for its octane number ?

0 Answers  

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Explain the fresh water cooling system.

0 Answers  

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What is 1810 stainless steel?

0 Answers  

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part of lathe which houses speed changing gears?

2 Answers   BEL,

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What is the parameter of water tube, boiler water, feed water and condensate water?

2 Answers   ABC,

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What is a turboprop engine?

0 Answers  

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