A diesel engine which is rated for normal...

Question 1 / 270705eccefa1bacbc34ba4d47367

Question 1 of 270705eccefa1bacbc34ba4d47367

A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a __________.

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Question 1 of 27070

A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a __________.

🔍 Key Concepts

• engine speed classifications commonly used for marine diesel engines (slow-, medium-, high-speed) • typical RPM ranges for each speed class of marine diesel engines • difference between speed class and how the engine is actually operated (e.g., variable vs constant speed)

💭 Think About

• Think about the usual RPM range for large low-speed main propulsion diesels on big ships. Is 800 RPM closer to that, or to smaller high-speed engines? • Recall the approximate RPM band that marine engineering texts associate with medium-speed diesels—does 800 RPM fall inside that band? • Consider what the term "constant-speed diesel" describes: is it a speed range classification or does it describe how the engine is used with a particular type of load (like a generator)?

✅ Before You Answer

• Identify the typical RPM ranges for slow-, medium-, and high-speed marine diesels and place 800 RPM in the correct band. • Verify whether constant-speed is about the operating characteristic (fixed RPM for alternator frequency) rather than the speed class of the engine. • Eliminate any option whose normal RPM range is clearly far above or far below 800 RPM.

Question 1 of 27070

A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a __________.

slow-speed diesel

medium-speed diesel

high-speed diesel

constant-speed diesel

Question 1 / 270705eccefa1bacbc34ba4d47367

Question 1 of 270705eccefa1bacbc34ba4d47367

A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a __________.

Back

Question 1 of 27070

A diesel engine which is rated for normal operation at a crankshaft speed of 800 RPM, is commonly classed as a __________.