Question 28General Subjects - QMED

The correct answer is B) The pulsation dampening needle valve should be throttled down (without closing) until the fluctuation ceases. When reading a pressure gauge with severe fluctuations, this indicates that there is excessive pulsation in the system. Throttling down the pulsation dampening needle valve will help to stabilize the pressure reading by restricting the pulsations. This is the proper procedure to obtain a more accurate and stable pressure reading. Option A is incorrect because simply averaging the maximum and minimum pressures does not address the root cause of the pulsations. Option C is also incorrect for the same reason. Option D, opening the needle valve wider, would have the opposite effect and would likely increase the pulsations, making the pressure reading less stable.