Nate Core Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

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If you double the RPM of a motor, what happens to the static pressure?

Increases

When the RPM (revolutions per minute) of a motor is doubled, the static pressure also increases due to the relationship between speed and pressure in fluid dynamics. Specifically, in centrifugal systems, such as fans or pumps, the pressure developed is a function of the speed at which the motor operates.

As the RPM increases, the kinetic energy imparted to the fluid increases, which typically results in a greater force being exerted on the fluid, leading to higher static pressure. This is especially evident in systems where airflow or fluid flow is being manipulated, as higher motor speeds create a stronger output and a more significant ability to push against opposing pressures.

Understanding this relationship is crucial in various applications, particularly in HVAC systems or any processes involving fluid mechanics, where managing pressure levels is essential for efficiency and performance.

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Decreases

Stays the same

Halves

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