Exam 7: Engine Systems Operation

How many revolutions of a two-stroke crankshaft are needed to produce a power stroke?

Describe ball bearings.

Two technicians are discussing bearing inspection. Technician A says that you can reuse a race if only the bearing is damaged. Technician B says that bearings come pre-lubricated from the factory. Who is correct?

Two technicians are discussing EFI systems. Technician A says that most modern EFI systems have one injector per cylinder. Technician B says that direct injection uses one central injector for the engine. Who is correct?

What type of seal is shaped like a bracelet without a clasp and fits into a groove in a component to provide a seal?

Two technicians are discussing engine operation. Technician A says that valve timing is critical to smooth engine operation. Technician B says that ignition timing is critical to smooth engine operation. Who is correct?

Describe direct injection.

What is a characteristic of a rotary engine?

What type of electrical component is a fuel injector considered to be?

What is the order of the four-stroke engine process?

The powertrain has become the most complex system in the vehicle.

What are the components of the charging system?

RTV must be matched to the application for which it is being used for.

Four-cylinder, in-line, gasoline engines are used less frequently in modern cars because of the block's weight and size.

What are the starter controls of the starting system?

A rotary engine uses a rotor to compress the air/fuel mixture.

Name two types of bearing inserts other than piston bearings.

Pressurized oil is required to maintain a space between the rod bearing and the crankshaft.

What is the sole emission concern that EGR valves are designed to lower?

All rollers or balls of a bearing must be lubricated for a bearing to be properly lubricated