which is more important in engineering pressure or vacuum pls give details.?

Answer 1

You need to rethink your question. Pressure and vacuum are both pressure but can have a different reference point. Pressure can be gage pressure or absolute pressure. A vacuum is measured from a absolute pressure of 14.7 psia or one bar.

Neither is more important than the other. Just as zero degrees C is no more important that 100 degrees C.

Answer 2

Sorry for the comparison, but its like asking which is more important - breathing in or breathing out!

Both pressure and vacuum are indispensable part of engineering - their importance lies in the application where they are used.

When the sun goes down, electric lamps come alive - can anybody imagine lighting industry without vacuum?

The picture tube in your television or computer monitor (no doubt they are being replaced by LCD's, but that also requires vacuum in its manufacturing process!)

When you apply brakes in your car, pressure is at work to control and stop the vehicle.

The applications are endless and all industries use pressure and vacuum (negative pressure) in some form or the other.

Answer 3

I think your question is one of semantics.

The question is really, "Where do you put the zero on the pressure scale?" Since we live in an atmosphere it is sometimes convenient to put the zero at atmospheric pressure levels (~14psi, 760 torr, 1 atm, etc.) because it's convenient to measure RELATIVE pressure levels. Engineers like to call this scale "Gage" pressure. In the US, its units are typically psig. Thus "vacuum" measurements are negative pressures.

However, on an absolute scale, total vacuum would be "zero" and all pressures are positive.

Thus, differences in pressure must be engineered, regardless of the scale used.

So they are essentially the same.

Answer 4

'Pressure' (assuming one is talking about pressure above atmospheric) is very widely encountered in engineering mainly as the means to cause fluid flow in transporting fluids from one point to another. 'Pressure' may also be important in terms of physical or chemical thermodynamics (for example in a gas turbine, many vapour/liquid separators, many types of reactors). There are less frequent, but still numerous, examples of where vacuum is used (for example in distillation of heat sensitive material, in the later stages of a steam turbine to increase efficiency, in some refrigeration systems)

Answer 5

don't entirely understand your question, but if you're asking what an engineer is more likely to encounter, it's pressure hands down. Pneumatics, hydraulics, water lines, even structural parts of buildings all involve pressure