When reading a pressure that fluctuates severely on a direct reading pressure gauge, what should be done?

Correct Answer: Option B — The pulsation dampening needle valve should be throttled down (without closing) until the fluctuation ceases.

Pulsation dampening valves are installed to protect gauge internals from rapid pressure fluctuations that cause wear and inaccurate readings. Throttling the valve restricts the flow of the pressure medium, effectively smoothing the input to the gauge without isolating it, which allows for a stable and readable pressure indication.