Steam Boilers, Engines, Nozzles and Turbines
The actual vacuum in a condenser is equal to

Barometric pressure + actual pressure
Gauge pressure - atmospheric pressure
Barometric pressure - actual pressure
Gauge pressure + atmospheric pressure

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Steam Boilers, Engines, Nozzles and Turbines
In cross compounding, the cylinders are arranged

Side by side and each cylinder has separate piston, connecting rod and crank
Side by side and each cylinder has common piston, connecting rod and crank
At 90° and each cylinder has common piston, connecting rod and crank
At 90° and each cylinder has separate piston, connecting rod and crank

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