š Key Concepts
ā¢ Trace the oil flow path from the inlet, through the heater and separator, to the oil outlet line in the MO-0127 diagram.
ā¢ Identify which component(s) actually control or restrict pressure/flow in the oil outlet line (look closely for valve labels near the outlet).
ā¢ Consider how changes in steam supply, separating temperature, and throughput (flow rate) would realistically affect pressure at the oil outlet, compared to a valve being closed on that line.
š Think About
ā¢ Which of the four choices directly acts on, or is located in, the oil outlet line itself according to the illustration?
ā¢ If steam pressure is low or temperature is too high, what happens first: a change in separation efficiency, or an immediate drop in oil outlet pressure?
ā¢ If throughput is too high, does that normally make outlet pressure higher or lower in a pressurized system like this, assuming valves are open and the pump is running?
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Before You Answer
ā¢ Locate regulating valve V4 on the drawing and confirm which line it is installed in and what direction of flow it controls.
ā¢ Check whether the low pressure in oil outlet alarm symbol is associated with a pressure transmitter or switch on the outlet line, and see what could starve that sensor of pressure.
ā¢ For each option, ask: does this condition directly reduce pressure at the oil outlet, or does it mainly affect some other parameter (like temperature or purity) with only an indirect effect on pressure?