Engine Lubrication System Quiz

What is the single most important property of engine oil?

• Color

• Viscosity

• Smell

• Density

What is the purpose of additives in engine oil?

• To reduce engine noise

• To increase engine temperature

• To improve oil properties

• To decrease fuel efficiency

What do viscosity index improvers do?

• Reduce oil consumption

• Increase fuel consumption

• Reduce viscosity change with temperature

• Increase oil viscosity

What do detergents and dispersants do in engine oil?

• Increase sludge formation

• Reduce wear on engine parts

• Prevent deposit-forming material from being suspended in the oil

• Increase fuel consumption

What do rust inhibitors do in engine oil?

• Increase oil deterioration

• Increase foam in the crankcase

• Form protective surface films

• Increase rust on metal surfaces

What is the purpose of oxidation inhibitors in engine oil?

• Increase formation of varnish

• Increase corrosive organic compounds

• Control oxidation of oil

• Increase viscosity with oil mileage

What is the main cause of oil deterioration in the engine?

• Contaminants

• Oxidation

• Viscosity index

• Oiliness

What is the ability of a lubrication oil to move steadily and continuously called?

• Multigrade oil

• Flow

• SAE number

• Viscosity

What does a dipstick do in the engine lubrication system?

• Delivers oil to the main oil gallery

• Checks the level of oil in the sump

• Protects the pump from hard objects

• Acts as a pressure regulator

What is the purpose of pressure relief valves in the engine lubrication system?

• Prevent oil oxidation

• Reduce oil viscosity

• Increase oil flow

• Act as a pressure regulator