Test on Aircraft Engine Lubrication Systems
Aircraft Engine Lubrication Systems: A Student Guide
Test: Aircraft Engine Lubrication, Engine Oil Additives, Office Supplies
20 questions
Question 1: The provided study materials explain the function of a dispersant additive as contained in ashless dispersant oil.
A. Ano
B. Ne
Explanation: The study materials include a question about the function of a dispersant additive but do not provide an explanation or answer for it.
Question 2: Which statement accurately describes a cold-tank lubrication system in an aircraft reciprocating engine?
A. The oil cooler is in the pressure subsystem.
B. The oil cooler is in the scavenge subsystem, and the oil returned to the tank has been cooled.
C. It is a program where oil samples are analyzed for wear metals.
D. The oil temperature would be high and oil pressure low if the supply was low.
Explanation: According to the study materials, a cold-tank lubrication system is one in which the oil cooler is in the scavenge subsystem. The oil that is returned to the tank has been cooled.
Question 3: Dispersants ensure sludge-forming contaminants remain suspended in the oil until an oil change allows for their removal.
A. Ano
B. Ne
Explanation: The study materials state: "A dispersant helps keep an engine interior clean by keeping sludge forming contaminants in suspension in the oil until they can be trapped by the filter or drained out at oil change."
Question 4: Engine oil filters can trap sludge forming contaminants that are kept in suspension by a dispersant.
A. Ano
B. Ne
Explanation: The study materials state that a dispersant keeps sludge forming contaminants in suspension in the oil until they can be trapped by the filter.
Question 5: After a dispersant keeps sludge forming contaminants in suspension in the oil, what are the possible fates for these suspended contaminants?
A. They are trapped by the oil filter.
B. They solidify and become part of the engine block.
C. They are drained out at oil change.
D. They evaporate due to engine heat.
Explanation: A dispersant keeps sludge forming contaminants in suspension in the oil until they can be trapped by the filter or drained out at oil change.