A four pole turbo generator is used in...

Question 1 of 270705eccefa4bacbc34ba4d485c0

A four pole turbo generator is used in conjunction with a 160 pole propulsion motor. If the generator is turning at 3,200 RPM, what is the current speed of the propeller?

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Question 1 of 27070

Q

A four pole turbo generator is used in conjunction with a 160 pole propulsion motor. If the generator is turning at 3,200 RPM, what is the current speed of the propeller?

🔍 Key Concepts

• Relationship between motor speed and number of poles in synchronous machines • How gear (or pole) ratios affect output speed • Proportional reasoning using ratios of poles

💭 Think About

• How does the speed of a synchronous machine change when the number of poles increases? Is it directly or inversely proportional? • What is the ratio of generator poles to motor poles, and how does that ratio affect the speed from generator shaft to propeller shaft? • Once you find the speed ratio, how do you apply it to 3,200 RPM to get the propeller speed?

✅ Before You Answer

• Confirm that speed is inversely proportional to the number of poles for synchronous machines (more poles = lower speed for same frequency) • Calculate the pole ratio between generator and motor before touching the answers • After calculating propeller RPM, compare it carefully with the closest multiple-choice option without rounding mistakes