Question 59General Subjects - QMED
70% to passOf the many impurities commonly found in marine lubricating oil, which of the following CANNOT be removed by a centrifugal purifier at normal operating speeds and temperatures?
ADiesel fuel oil
BMetal particles
CWater
DCarbon particles
AI Explanation
The correct answer is A) Diesel fuel oil. Centrifugal purifiers are designed to remove impurities such as water, metal particles, and carbon particles from marine lubricating oil. However, diesel fuel oil is not easily removed by a centrifugal purifier operating at normal speeds and temperatures. Diesel fuel oil has a similar density to the lubricating oil, making it difficult to separate the two liquids using centrifugal force alone. The other options, water, metal particles, and carbon particles, can be effectively removed by a properly functioning centrifugal purifier.
Related Questions
Q28:When reading a pressure that fluctuates severely on a direct reading pressure ga... Q239:Which of the instruments listed is used to measure the gauge of a piece of sheet... Q98:Before primers and finish coats may be applied to a metal surface, the surface m... Q65:Fusible plugs are installed in fire-tube boilers to _______________. Q316:A distinguishing feature of an eductor, when compared to other pumps, is the ___...
Ready to test your knowledge?
Take a General Subjects - QMED Practice ExamOfficial Resources