Exam 19: Diesel Engine Operation and Diagnosis

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

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?

The diesel exhaust fluid is injected ________.

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

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

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

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

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

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

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?