LUBRICATION SYSTEMS TEST QUESTIONS WITH CORRECT ANSWERS 2024/2025 UPDATED GUARANTEED PASS

LUBRICATION SYSTEMS TEST QUESTIONS WITH CORRECT ANSWERS 2024/2025 UPDATED GUARANTEED PASS List five functions of the oil in an engine lubrication system. - -------- CORRECT ANSWERS----------Cools, Cleans, seals and cushions, prevents corrosion, and reduce friction. The resistance of an oil to flow is known as its ________. - -------- CORRECT ANSWERS----------Viscosity. Oil that flows freely has a ____ viscosity. - -------- CORRECT ANSWERS----------Low. The oil used in reciprocating engines has a relatively _____ (high or low) viscosity. - -------- CORRECT ANSWERS----------High. The measure of the change in viscosity with a given change in temperature is know as the ______ ________. - -------- CORRECT ANSWERS----------Viscosity index. An engine lubricating oil whose viscosity changes very little for a given change in temperature has a _______ viscosity index. - -------- CORRECT ANSWERS----------High. The point at which liquid will begin to give off ignitable vapors is known as the _______ point. - -------- CORRECT ANSWERS----------Flash. Aviation 80 engine oil has the same viscosity as SAE ____ - -------- CORRECT ANSWERS----------40 The use of straight mineral oil in aircraft reciprocating engines is associated with what conditions? - -------- CORRECT ANSWERS----------New/newly overhauled engines and older engines. The lubricating properties of straight mineral oil _______ (are/are not) as good as those of ashless dispersant oil. - -------- CORRECT ANSWERS----------Are not. Synthetic lubricating oils are ______ (multi or single) viscosity oils. - -------- CORRECT ANSWERS----------Multi If incompatible oil has been added to a turbine engine, it is often necessary to _____ and ______ the oil system before refilling with the proper oil. - -------- CORRECT ANSWERS----------Flush and refill. Turbine engine oils ______ (do or do not) use a standard identification system. - -------- CORRECT ANSWERS----------Do not. SAE numbers _____ (are or are not) used to identify turbine oils. - -------- CORRECT ANSWERS----------Are not. Two types of lubricating systems for reciprocating aircraft engines are _________ and ___________. - -------- CORRECT ANSWERS----------Wet sump and dry sump. The lubricating is distributed to the parts of a reciprocating engine by these three methods: - -------- CORRECT ANSWERS----------Pressure, Splash, and combination (spray). The main disadvantages of a wet-sump engine are: - -------- CORRECT ANSWERS What two markings must be on the oil filler cap? - -------- CORRECT ANSWERS------------------Size is limited, cooling is less efficient, and temperature is higher. --Oil, and the tank capacity. Oil tanks used on engines equipped with hydromatic propellers will feed the pressure pump from a stand-pipe, leaving a reserve of oil for _________ _________. - -------- CORRECT ANSWERS----------Propeller Feathering. A gear-type oil pump is a ______ (constant or variable) displacement pump. - -------- CORRECT ANSWERS----------Constant.