Final answer:
The statement is false; throttling a compressor does not decrease discharge pressure, as throttling refers to reducing the flow rate of fluid at the intake, not directly controlling discharge pressure.
Step-by-step explanation:
The statement that throttling a compressor decreases discharge pressure is false. Throttling typically refers to the process of reducing the flow rate of a fluid by partially closing a valve.
In the context of a compressor, which is a device that increases the pressure of a gas by reducing its volume, throttling would ostensibly refer to the action taken on the intake side to limit the amount of gas entering the compressor.
This action would not directly decrease the discharge pressure.
On the contrary, reducing the intake may lead to a reduced flow rate out of the compressor, but the discharge pressure is dependent on the compressor's design and the conditions of compression, and is not typically controlled by throttling at the intake.