Question 73Motor Plants - Assistant Engineer
70% to passA diesel engine with a full speed of 1000 RPM drives a propeller at 300 RPM. What is the speed reduction ratio?
A0.3 to 1
B3.33 to 1
C33 to 1
D300 to 1
AI Explanation
The correct answer is B) 3.33 to 1. The speed reduction ratio is calculated by dividing the engine's full speed (1000 RPM) by the propeller's speed (300 RPM). This gives a ratio of 1000 RPM / 300 RPM = 3.33 to 1. The other options are incorrect because: A) 0.3 to 1 is the inverse of the correct ratio. C) 33 to 1 is too high and does not match the given information. D) 300 to 1 is also too high and does not match the given information.
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