AUT 102 Chapter 19 Week 3 Quiz

The cylinder head relates to the entire engine assembly by providing the "end cap" for the combustion chamber.

• True

• False

With a(n) ________, instead of mixing the fuel/air in the intake manifold, it mixes in the combustion chamber.

• Oval combustion chamber

• Wedge combustion chamber

• Gas direct injection cylinder head

• Bathtub combustion chamber

Valve seats are usually made of a(n) ______ because the alloy is stronger than the metal itself and provides a more durable surface.

• Iron Alloy

• Steel Alloy

• Aluminum Alloy

• Plastic

The overhead cam engine system is more complicated than the OHV engine due to the need for enhanced oiling at the top of the engine for the ______.

• Camshaft

• Lifters

• Followers

• All of the above

_______ is a measure of the amount of pressure the valve spring is exerting to overcome the inertia of the valve train as the valve reaches its fully opened position.

• Valve float pressure

• Valve spring open pressure

• Valve spring closed pressure

• Valve spring retainer pressure

All of the statements below are true EXCEPT:

• The timing of the valves is controlled by the physical shape and position of the cam lobes on the cam shaft

• Racing engines are designed to minimize the effect of the column inertia encountered at higher rpm.

• Valve timing is critical to the proper operation of the ICE

• On variable valve timing engines, the valve timing can be modified to provide the best operating conditions.

Valve seat grinding is the term used to describe when the seat is ground to the proper angle with a special grinding stone.

• True

• False

Tech A says that valve overlap occurs between the exhaust stroke and the intake stroke. Tech B says that valve overlap occurs to assist in scavenging the cylinder. Who is correct?

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B

Technician A says that when the lifter is on the base circle of the cam lobe, the valve is closed. Technician B says that the valve has a small amount of clearance when the valve is fully open. Who is correct?

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B

Technician A says that when the lifter is on the base circle of the cam lobe, the valve is closed. Technician B says that the cam-in-block lifter rides directly against the valve. Who is correct?

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B