Exam 19: Diesel Engine Operation and Diagnosis

High pressure common rail fuel injectors are opened by ________.

This diesel engine is the ________ type.

The most common diesel exhaust emission test used in local testing programs is ________.

Technician A says that injector nozzles are either opened by the high-pressure pulse from a distributor pump or electrically by the computer on a common rail design. Technician B says that indirect injection (IDI) occurs directly into the combustion chamber. Who is right?

This diesel engine is the ________ type.

The diesel particulate filter in the exhaust system is used to trap ________.

The three phases of diesel ignition include ________.

What fuel system component is used in a vehicle equipped with a diesel engine that is not usually used on the same vehicle when it is equipped with a gasoline engine?

How is diesel fuel ignited in a warm diesel engine?

What percent of opacity means the exhaust has no visible smoke and does not block light from a beam projected through the exhaust smoke?

Technician A says that diesel engines can be tested using a scan tool to determine sensor values. Technician B says that glow plugs can be used to locate a weak cylinder. Who is right?

Technician A says that glow plugs are used to help start a diesel engine and are shut off as soon as the engine starts. Technician B says that the glow plugs are turned off as soon as a flame is detected in the combustion chamber. Which technician is correct?

Which type of diesel injection produces less noise?

What color exhaust smoke occurs most often during cold engine starts because the smoke is usually condensed fuel droplets?

What part should be removed to test cylinder compression on a diesel engine?

A diesel engine should produce at least ________ psi of compression pressure and all cylinders should be within 50 psi of each other.

Glow plugs should have high resistance when ________ and lower resistance when ________.

Which diesel injection system requires the use of a glow plug?

The use of a variable vane turbocharger allows the elimination of the ________.

The diesel injection pump is usually driven by a ________.