When reading a pressure that fluctuates...

Question 1 / 2707066636eee28f7522a1c51f0a0

Question 1 of 2707066636eee28f7522a1c51f0a0

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

Question 1 of 27070

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

🔍 Key Concepts

• Pulsation dampening needle valve purpose on a pressure gauge line • Effect of opening vs. throttling (partially closing) a valve on unstable flow or pressure readings • Why a stable, readable indication is more important than manually averaging wildly fluctuating readings

💭 Think About

• What is the main function of a pulsation dampening needle valve in a pressure gauge system? How does changing its opening affect the gauge behavior? • If a gauge pointer is swinging back and forth rapidly, is it safer and more accurate to rely on your eye to "average" the motion, or to adjust the system so the gauge itself becomes steady? • Which option actually changes the physical conditions at the gauge (flow/pressure pulses) rather than just changing how you interpret the numbers?

✅ Before You Answer

• Identify which choices involve adjusting the needle valve and which do not. • Among the valve-related choices, decide which action would reduce the effect of pulsations on the gauge mechanism. • Confirm that the chosen action seeks a steady, readable indication instead of depending on human estimation of an average.

Question 1 of 27070

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

The pulsation dampening needle valve should be opened wider until the fluctuation ceases.

The maximum and minimum pressures should be noted and added together and divided by two to obtain the average pressure.

Attempt to determine the midpoint between the maximum and minimum pressures and use this an estimate of the average pressure.

The pulsation dampening needle valve should be throttled down (without closing) until the fluctuation ceases.

Question 1 / 2707066636eee28f7522a1c51f0a0

Question 1 of 2707066636eee28f7522a1c51f0a0

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

Back

Question 1 of 27070

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