1122 Unit 1 Mod 1 Test Review Engine Theory

1. To complete a four-stroke cycle in one cylinder, the crankshaft must rotate ______ degrees.

• 360

• 720

• 180

• 540

2. Both valves are closed on the ______ strokes.

• Intake and Exhaust

• Compression and Power

• Intake and Compression

• Power and Exhaust

Engine oil pressure testing is being discussed. Technician A says that oil pressure should be tested with the engine cold. Technician B says oil with viscosity that is too high may cause lower than specified pressure. Who is correct?

• A only

• B only

• Both A and B

• Neither A nor B

The reciprocating movement of the piston is converted into rotary motion by the ____.

• Camshaft

• Crankshaft and Connecting Rod

• Intermediate Shaft

• Flywheel

What component of the engine determines the stroke?

• The crankshaft

• The connecting rods

• The pistons

• The cylinder block

Which of the following is a function of the engine's lubrication system?

• Holds an adequate supply of oil

• Delivers oil to all necessary areas of the engine

• Removes contaminants from the oil

• All of the answers are correct

What does blue exhaust smoke indicate?

• Oil entering the combustion chamber

• Coolant entering the combustion chamber

• Excessively rich fuel mixture

• All of the answers are correct

Two technicians are discussing oil filters. Technician A says the oil filter has an anti-drain-back valve that presents the oil in the filter and engine oil passages from returning to the sump when the engine is shut down. Technician B says the oil filter has a bypass valve that in the event the filter becomes plugged, oil can flow directly to the bearings. Who is correct?

• A only

• B only

• Both A and B

• Neither A nor B

How many degrees of rotation does the camshaft make to complete the 4 stroke cycle?

• 180

• 90

• 720

• 360

An engines lubrication system should increase pressure _____psi for every 1000 rpm increase.

• 5psi

• 10psi

• 25psi

• 20psi