On the marine gas turbine shown in the...

On the marine gas turbine shown in the...

Question 1 of 270705eccef9fbacbc34ba4d46bb2

On the marine gas turbine shown in the illustration, the gas generator speed sensor is located ______. See illustration GT-0017.

Question 1 of 27070

Q

On the marine gas turbine shown in the illustration, the gas generator speed sensor is located ______. See illustration GT-0017.

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🔍 Key Concepts

• Review how a gas generator is defined in a marine gas turbine (which shaft/rotor it refers to). • Identify on the illustration where the N_g (gas generator) speed pickup is drawn and what component it is mounted on. • Recall how the accessory gearbox is typically driven and where speed sensors are most conveniently installed.

💭 Think About

• On this type of split‑shaft gas turbine, which rotating assembly actually represents the gas generator—compressor, high‑pressure turbine, or power turbine? • Looking closely at GT‑0017, which component shows a small probe or pickup symbol labeled for gas generator speed, and what is that probe physically attached to? • From a maintenance standpoint, which location would give easy access to the speed sensor while still measuring true gas‑generator RPM?

✅ Before You Answer

• Be sure you can clearly distinguish the gas generator section from the power turbine section on the drawing. • Confirm which housing in the illustration is identified as the accessory gearbox and what is mounted on it. • Verify that the chosen location would rotate at the same speed as the gas generator shaft, not the free power turbine.