Question { Essar, 38354 }

What does a pump develops? Flow or Pressure. Give the
Answer with Proper Logic.

Answer

Pumps are of many type if you take a simple example of
cetrifugal pump in it the rise in pressure head at any
point of the rotating liquid takes place. The rise in
pressure head at any point of the rotating liquid is
proportional to the square of tangential velocity of the
liquid at that point.Due to high pressure head the flow
increases.

Question { 7959 }

How we can increase the efficiency of boiler without
creating any effort

Answer

There are many ways to ensure that boiler and steam
distribution systema operate at optimum efficiency. steam
is used at a large scale in power plants it is important to
optimise the efficiency of each parts of such systems by
selection, sizing operation and maintenance.

Question { 6885 }

What is more sutable study for mechanical engg. Practical
or Theoritical

Answer

Practical Study is always more benificial in all streams
not only for mechanical.

Question { 9822 }

Why do we go for 4-20mA? why not other standara?

Answer

In long distance wire if some wire are broken then at the
receiver end there will be current value 0. If we take 0-20
standard in that case it will be difficult to know that the
current value is actually 0 or its 0 because of broken wire.
but in case of 4-20 it the the signal is in off state then
at the receiver end we will have current value 4 and in
case of broken wore we will have current value 0.