The component shown in the illustration,...

Question 1 of 31048fy_heal_CREATE_q804_2021

The component shown in the illustration, labeled "IV", is the __________. Illustration SE-0013

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Question 1 of 31048

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The component shown in the illustration, labeled "IV", is the __________. Illustration SE-0013

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🔍 Key Concepts

• Reduction gear train layout in a main propulsion system (which gears are small/fast vs large/slow) • Relationship between pinions (small gears) and reduction gears/bull gear (large gears) • How power flows from the turbine or engine shaft to the propeller shaft through the gear set

💭 Think About

• Look at where component IV is located in the train: Is it on the turbine (high‑speed) side, the intermediate side, or the propeller (low‑speed) side? • Compare the relative size of gear IV to the others in the illustration: is it the smallest gear, an intermediate gear, or the largest gear? • Think about which parts are usually called pinions and which are called gears/bull gear in a double‑reduction gear set.

✅ Before You Answer

• Identify which shaft component IV is on: high‑speed shaft, intermediate shaft, or main (propeller) shaft • Check whether IV is driving a larger gear or is driven by a smaller pinion • Confirm if IV is a pinion (small driving gear) or a reduction/bull gear (larger driven gear) before choosing between the options