To much back pressure is often caused by a blockage in the exhaust system, such as a clogged or broken catalytic converter. This can be remedied by clearing the blockage or replacement of the cat. A lack of back pressure is usually caused by an aftermarket exhaust that is to big being installed on a vehicle or a broken exhaust pipe.
Engine back pressure is a common ailment in faulty engines. It is when the exhaust sends the power to the very back of the vehicle, instead of through its engine.
With no engines you can't. Engines provide power and thurst as well as cabin pressure. The APU is a back up generator and can provide power when engines are lost.
Yes
Usually back pressure is caused by worn piston rings, combustion gasses passing the rings into the sump, there are also some engines which have positive oil pan ventilation trough the air filter with a suction pipe (BMW engines)Back pessure goes hand in hand with light blue smoke and lack of compression.
Reasons of efficiency. not the least of which is that the pressure generated in the combustion chamber has to fight less "back pressure" (think of it as pressure resistance) at high altitude because the air-pressure is less.
Mainly to treat high blood pressure.
Usually back pressure is caused by worn piston rings, combustion gasses passing the rings into the sump, there are also some engines which have positive oil pan ventilation trough the air filter with a suction pipe (BMW engines)Back pessure goes hand in hand with light blue smoke and lack of compression.
Perhaps "Honda".
Gas turbine engines and airbreathing jet engines use the Brayton Cycle.
The pressure ratio in jet engines is the ratio of pressure between the entrance of the compressor and the exit of the compressor.
float and pressure
Engines need higher fuel pressure to start than they do to run.