Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / bala10286
in case of positive displacement pumps (ex:reciprocating
pump) the piston or mechanical member directly creates the
vacuum or lower pressure such that the water or liquid is
sucked in..
in case of centrifugal pumps...the impeller just
displaces the water due to the centrifugal force..as the
water at center of impeller is displaced to the
casing..partial vacuum gets created at the eye of impeller
and hence suction of new water takes place..
if there is no water around impeller..only air is
present and it cant be displaced by the pump impeller as air
is compressible..the pump impeller is designed to handle
water or liquid.. therefore to remove the air and fill the
casing with water the priming is carried out..
there is no need of priming if there is an foot
valve and its working well...
| Is This Answer Correct ? | 17 Yes | 2 No |
Post New Answer View All Answers
how can I calculate daya of pump
What are the effects of carbon on the properties of steel?
sir/ madam i m apearing to rrb bhubaneswar for entrans exam please i want a help to get thruogh this
What is the importance of tolerance in engineering?
what is inlet gas pressure of ge 9 fa gas turbine ?
sir, i am going to appear in the test of BEML 2009 so i want to get the type of question paper asked in previous exams of BEML.
What are the advantages of diesel engines?
Temperature closer for brazing operation is-------
Maximum combustion temperature in gas turbines is of the order of 1100 to 10°c whereas same is around 00°c in i.c. Engine ? Why ?
• What is your weakness?
I have just joined mechanical engineering this year. I just wanted to know the names of the books which would improve my engineering knowledge and skills. Or isthere any other means to improve it?
WHAT IS EASY & PERFECT METHOD TO JOIN CONVEYOR BELTSEXPLAIN IN DETAIL
Can any one send me the syllabus for RRB Chennai, for section engineer, mechanical. mail it to mail Id vijaymahantesh.sk@gmail.com
ball pen is writtingg on paper
I have mechanical job experience. I am planing to get diploma with the basis of my experience. which institutes will do this in fast track mode.
