The air filter restriction indicator uses what to detect when it signals to replace the filter?

Air filters can remove particles and dirt as small as ________.

Why do many port fuel injected engines use long intake runners?

The upper portion of a two part intake manifold is often called the ________.

Which of the following is/are terms for a variable intake manifold?

Why are the EGR gases cooled before entering the engine on some engines?

Technician A says that a cracked exhaust manifold can affect engine operation. Technician B says that a leaking lower intake manifold gasket could cause a vacuum leak. Which technician is correct?

Technician A says that some intake manifolds are plastic. Technician B says that some intake manifolds are constructed in two parts or sections: upper and lower. Which technician is correct?

Why is the catalytic converter places as close to the engine as possible?

The ________ smooths out the pressure pulses in the exhaust system, allowing them to be released at an even and constant rate.

Exhaust manifold gaskets are used to compensate for ________ in the exhaust manifold.

All of these are main jobs of the air cleaner and filter parts, EXCEPT ________.

Technician A says that exhaust manifolds can be made from hard plastic or aluminum. Technician B says that many intake manifolds have an EGR valve that regulates the amount of recirculated exhaust that enters the engine in order to increase NOx emissions. Who is right?

Technician A says that a cracked exhaust manifold can affect engine operation. Technician B says that a leaking lower intake manifold gasket could cause a vacuum leak. Which technician is correct?

Technician A says that the exhaust   contains a catalytic converter, exhaust pipes, and muffler. Technician B says that the entire exhaust system is supported by metal hangers that isolate the noise and vibration of the exhaust from the rest of the vehicle. Who is right?

The intake manifold of a port fuel-injected engine does which of these?

Technician A says that intake manifolds are always made of metal. Technician B says that some intake manifolds are constructed in two parts or sections, upper and lower. Who is right?

The automotive engine uses about ________gallons of air for every gallon of gasoline burned at an air-fuel ratio of 14.7to 1.

Some air filter systems also have a(n)________ sensor between the throttle body and the air cleaner.

Shorter runners in a port fuel injected engine provide which of these?

A cracked exhaust manifold can cause false readings from which of these engine sensors? 

Some vehicles have no exhaust manifold and the catalytic converter is attached directly to the ________.