Question 12Gas Turbine - 1st Asst/Chief
70% to passFor the same amount of available power, how does a low speed two-stroke diesel engine compare to a recuperated gas turbine configuration?
The correct answer is D. The two-stroke diesel engine would burn less fuel than a recuperated gas turbine, however, the levels of particulate and nitrogen oxide (NOx) levels in the exhaust would be higher. This is because two-stroke diesel engines are generally more efficient in converting fuel to power compared to recuperated gas turbines. However, the combustion process in a two-stroke diesel engine produces higher levels of particulate matter and nitrogen oxides (NOx) emissions due to the high-pressure, high-temperature conditions in the engine cylinder. The other options are incorrect because A) is the opposite of the correct answer, B) suggests the two-stroke diesel would have lower NOx emissions which is not the case, and C) correctly identifies the fuel efficiency but incorrectly states the particulate and NOx levels would be lower.
Ready to test your knowledge?
Take a Gas Turbine - 1st Asst/Chief Practice ExamWant to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App