Lubrication Systems

The safety device in a full-flow oil filtration system that ensures that oil will reach the engine bearings even if the filter is completely clogged is the ____.

• Bypass valve

• Pressure regulator valve

• Restrictor orifice

• Vent tube

Which of the following is a possible cause of high engine oil pressure?

• Clogged oil filter

• Low oil level in the crankcase

• Oil filter leak

• Oil in the crankcase is too heavy

Which of the following is a possible cause of low engine oil pressure?

• Defective pressure gauge

• Improper regulator valve spring

• Oil pump leak

• Restricted oil gallery

Which component controls the oil pressure as it flows through the oil pump?

• Bypass valve

• Crescent pump

• Pressure regulator valve

• Restrictor orifice

Which type of electrical oil pressure indicating system has a digital gauge instead of a warning light?

• Electromagnetic coil indicating system

• Electronic indicating system

• Heating coil indicating system

• Pressure switch indicating system

The part of a force-feed lubrication system that maintains sufficient pressure to lubricate the engine’s moving parts is the ____.

• Oil cooler

• Oil pickup line

• Oil pressure relief valve

• Oil pump

According to most OEMs, synthetic oils should be used during an engine’s break-in period.

• True

• False

Viscosity is a measure of an oil’s thickness or resistance to flow.

• True

• False

The greatest amount of wear in an external gear pump is generally found on the housing.

• True

• False

Tube oil coolers are usually mounted in the engine or the crankcase.

• True

• False