As indicated in the graph, what percentage...

Question 1 of 270705eccefa1bacbc34ba4d472d0

As indicated in the graph, what percentage of rated horsepower is being developed when operating the main propulsion turbine at 80% speed? See illustration SE-0018.

Back

Question 1 of 27070

Study area:

As indicated in the graph, what percentage of rated horsepower is being developed when operating the main propulsion turbine at 80% speed? See illustration SE-0018.

No Illustration

This question does not have an illustration

🔍 Key Concepts

• Relationship between percent speed and percent horsepower for a propulsion turbine/propeller • How to read a curve graph: go up from the x‑axis value, then across to the y‑axis • Typical propeller law idea: power changes much faster than speed

💭 Think About

• On the x‑axis, locate 80% speed. From that point, what direction along the graph do you move first, and then second, to find the corresponding horsepower? • Visually compare the point at 80% speed to the labeled horsepower grid lines: is it closer to 20%, 50%, or 80% horsepower? • Think about this: if you cut speed to 50%, does horsepower usually drop to 50%, much less than 50%, or more than 50%? Use that same idea at 80% speed.

✅ Before You Answer

• Be sure you are reading speed on the horizontal axis and horsepower on the vertical axis • At 80% speed, carefully note which two horizontal grid lines the curve lies between and roughly how far between them • Confirm that your chosen option’s horsepower percentage matches the visual position of the curve at 80% speed (don’t just average or guess)