Which of the devices listed is generally...

Question 1 / 270705eccefa1bacbc34ba4d4719f

Question 1 of 270705eccefa1bacbc34ba4d4719f

Which of the devices listed is generally used to engage the main engine turning gear to the high- pressure turbine high-speed pinion?

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Question 1 of 27070

Which of the devices listed is generally used to engage the main engine turning gear to the high- pressure turbine high-speed pinion?

🔍 Key Concepts

• Turning gear purpose – why do we use a turning gear on a main engine / turbine train? • Types of connections between shafts: permanent couplings vs clutches vs brakes • What a high‑speed pinion does in a reduction gear set and how it is safely engaged/disengaged

💭 Think About

• Ask yourself: does this device need to be engaged and disengaged regularly by the watchstander, or is it normally a permanent part of the shafting? • Which device type allows positive mechanical engagement of the turning gear with the pinion teeth, without slipping, when the turbine train is at rest? • Which option is normally used for holding or slowing rotation (braking) rather than transmitting turning power at very low speed?

✅ Before You Answer

• Identify which options are permanent couplings (normally not used for temporary turning-gear engagement). • Identify which option is primarily a braking device, not a driving connection. • From the remaining choices, decide which device is typically hand‑operated to mesh the turning gear with the high‑speed pinion on large marine turbines.

Question 1 of 27070

Which of the devices listed is generally used to engage the main engine turning gear to the high- pressure turbine high-speed pinion?

Quill shaft

Manually operated sliding jaw clutch

Manually operated band brake

Sleeve coupling

Question 1 / 270705eccefa1bacbc34ba4d4719f

Question 1 of 270705eccefa1bacbc34ba4d4719f

Which of the devices listed is generally used to engage the main engine turning gear to the high- pressure turbine high-speed pinion?

Back

Question 1 of 27070

Which of the devices listed is generally used to engage the main engine turning gear to the high- pressure turbine high-speed pinion?