#12: Oils and Lubrication Flashcards
Q2. What are three disadvantages of synthetic oil?
A. Expensive
B. Some have traits incompatible with unit-construction motorcycle engines (friction modifier interfere with wet clutches).
C. Higher film strength is a liability in worn or not yet broken-in engines (clearances)
Q1. What are the four purposes of lubricating oil?
A.Clean B.Cool
C.Seal D.Lubricate
Q. What does SAE stand for?
A. Society of Automotive Engineers
Q. What does API stand for?
A. American Petroleum Institute
Q. What property does the SAE rate in an lubricant?
A. Viscosity
Q. Define a multi-viscosity oil:
A. An oil with a very high viscosity index.
Q. What property does the API rate in a motor oil?
A. Service Duty, levels of protection.
Q. What does the āSā (first letter) in the API rating represent?
A. Service duty
Q. Wet Sump
A. Oil stored in the crankcase.
Q. Dry Sump
A. Oil stored in a remote tank
Q. Three types of oil pumps used in motorcycles:
A. Plunger B. Gear C. Trochoid
Q. Purpose of the oil pressure relief valve?
A. Bleeds off excessive oil pressure to maintain a maximum pressure.
Q. What is the purpose of the oil filter bypass valve?
A. If filter clogs, valve opens to allow oil flow.
Q. Name four types of oil filters:
A. Screen B. Fiber
C. Paper D. Centrifugal
Q. What is the purpose of using grease?
A. For lubricating in an area where a liquid lubricant cannot be contained.
