Exam 32: Intake and Exhaust Systems

The function of the catalytic converter on a diesel engine is to eliminate ______.

Which of the following statements concerning superchargers is NOT correct?

Tuned exhaust manifolds are primarily designed to reduce noise.

Variable intake manifolds for engines with port fuel injection are being discussed. Technician A says at low speeds, the air travels through a short or large diameter runner. Technician B says they deliver more power at high speed. Who is correct?

What is a vacuum?

An intercooler can reduce the temperature of the inlet air as much as __________________ degrees Fahrenheit.

Technician A says an intake manifold that delivers both air and fuel (carburetor or TBI)is designed to cause turbulence so that the air and fuel mix while they are being delivered to the cylinders. Technician B says in an air only type manifold (PFI)the length of the runners is designed to achieve the best performance during a particular range of engine speeds. Who is correct?

An engine in good condition will produce a steady, constant vacuum reading above 15 inches at a warm idle.

What are the three functions of the exhaust system?

Which of the following is NOT a characteristic of a turbocharger?

Vacuum refers to any pressure that is higher than the earth's atmospheric pressure at any given altitude.

If a catalytic converter in a late model vehicle is not working properly, the ______________________ will turn on.

Which of the following is NOT a metal used for producing exhaust manifolds?

Which of the following is NOT an engine exhaust pollutant that is changed by the catalytic converter?

In an intake manifold for a PFI engine, the __________________ serves as a reservoir for the air and is used to distribute the intake charge evenly to the runners and intake ports.

In a turbocharger, the turbine and compressor wheels rotate at speeds up to ______.

A vacuum gauge may be used to check for a restricted exhaust system.

Technician A says the bearings in a turbocharger are cooled by engine oil. Technician B says turbocharger bearings are cooled by engine coolant. Who is correct?

On some new engine designs, the exhaust manifold is incorporated into the cylinder head to increase the efficiency of the driving the turbine.

Electric turbochargers are standard equipment in some newer vehicles .