How is diesel fuel ignited in a warm diesel engine?

Which diesel system supplies high-pressure diesel fuel to all of the injectors all of the time?

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?

Which of the following may be a symptom of injector O-ring trouble in a HEUI system?

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?

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

Selective catalytic reduction (SCR) uses urea injection to reduce ________ emissions.

Which of these takes place during regeneration in a diesel particulate filter (DPF)?

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?

Technician A says that a diesel engine uses the heat of compression to ignite the diesel fuel. Technician B says that direct injection (DI) uses a pre-combustion chamber. Who is right?

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?

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?

The diesel injection pump is usually driven by a ________.

Which type of diesel injection produces less noise?

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

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

The three phases of diesel ignition include ________.

A diesel powered vehicle with a manual transmission is rapidly accelerated in low gear from an idle speed to a maximum governed RPM while the smoke emissions are measured. Which of these diesel smoke opacity tests is being performed?

What percent of opacity means that the exhaust is so dark that it completely blocks light from a beam projected through the exhaust smoke?

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

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

Which of these tools is used for checking a diesel injector nozzle for proper spray pattern?

The diesel exhaust fluid is injected________.

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

The accelerator pedal position (APP)sensor sends a ________ signal to the engine control computer.

High pressure common rail fuel injectors are opened by ________.

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

When compared to a gasoline engine, the diesel engine may be ________ than a similar size engine.