Which of the operating positions, for valve...

Question 1 of 270705eccefa2bacbc34ba4d47760

Which of the operating positions, for valve "A" shown in the illustration, should be chosen to maintain the circuit in continuous flow, regardless of failure to the included downstream components? Illustration MO-0115

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Question 1 of 27070

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🔍 Key Concepts

• Trace the flow path from the start air reservoir, through valve A, to the outlet toward the air control reservoir in each position I–IV. • Identify which position of valve A provides a direct or alternative path that does not depend on valves B, C, E, and F all operating correctly. • Think about how a bypass position is usually drawn in pneumatic schematics (look for a position that connects inlet to outlet while avoiding sensitive control components).

💭 Think About

• For each position I–IV, which ports of valve A are connected? Follow the arrows in the symbol and sketch the flow path to the right side of the diagram. • If one of the downstream valves (B, C, E, or F) were to stick closed, in which position of valve A would air still have a way to reach the outlet line toward the air control reservoir? • Is there a position where valve A routes air only through the pressure‑reducing and safety devices, and a different position where it allows air to bypass those devices? Which one would better ensure continuous flow even during failure?

✅ Before You Answer

• For each position, verify which ports are actually connected inside valve A; don’t rely on the labels alone—use the arrows in the valve symbol. • Confirm whether the chosen position still allows a path to the outlet if one of the parallel branches (through B or C) is blocked. • Double‑check that the position you pick would not completely depend on the proper operation of component F (final regulating valve) for any flow to pass.