🔍 Key Concepts

• Automatic control action of a gland seal regulator (what it should do when pressure is too high vs too low) • Mechanical linkage motion between piston "F" and valves "B" (makeup steam) and "E" (exhaust) in the illustration • Direction of force on piston "F" when pressure under/over it changes

💭 Think About

• First decide: when gland seal pressure rises above setpoint, should the regulator admit more steam or less, and should it vent more or less to exhaust? Match that logic to the answer choices. • Trace the linkage in the drawing: if piston "F" moves UP, what happens to the levers connected to valves "B" and "E"? If piston "F" moves DOWN, what happens? • Look at where the regulated pressure is applied to piston "F". Does increasing pressure push it upward or downward based on the shaded pressure area shown?

✅ Before You Answer

• Verify which motion (up or down of piston "F") will reduce makeup steam flow through valve "B" when pressure is already high. • Verify which motion will increase exhaust opening at valve "E" to bleed off excess pressure. • Confirm on the illustration which side of piston "F" is the active pressure surface (shaded area and arrows) so you know which way it will move when pressure increases.