HD Gasoline Systems

0%

An average mixture of air to gasoline for a moderate cruising speed is approximately

Correct! Wrong!

The maximum amount of pressure the fuel pump exerts on the fuel line to the carburetor depends on the

Correct! Wrong!

The advantage of an electric fuel pump over a manual fuel pump is that the electric fuel pump can

Correct! Wrong!

The device that controls fuel entry into a carburetor by adjusting a needle position relative to its seat in a fuel bowl is known as a (n)

Correct! Wrong!

The main discharge tube runs from the __________ __________ through the metering jets, to the air intake above the carburetor venturi.

Correct! Wrong!

The carburetor''s low speed circuit functions when the vehicle is at low speed and

Correct! Wrong!

The item used to create a vacuum at the venturi strong enough to draw a substantial amount of fuel from the main discharge nozzle when cranking, is know as a (n)

Correct! Wrong!

The item used to prevent a "flat spot" or "hesitation" and inject more fuel when the throttle is snapped to the full open position is known as a(n):

Correct! Wrong!

There are three types of vacuums created by an engine and carburetor: 1. in the intake manifold below the throttle plates, and 2. in the carburetor''s venturi, and 3. the ported vacuum.

Correct! Wrong!

A loose carburetor mounting to the intake manifold may cause

Correct! Wrong!

How many "circuits" are there in most automotive carburetors?

Correct! Wrong!

On sequential gasoline multiport fuel injection systems, the fuel injectors inject fuel

Correct! Wrong!

A mass airflow sensor (MAF) may use a ______________ to determine air flow.

Correct! Wrong!

The primary function of the throttle air bypass valve is to control ________________'

Correct! Wrong!

When does the idle air control valve (IAC) control airflow?

Correct! Wrong!

One important function of the inertia switch is to control power to the ____________ in the event of an accident.

Correct! Wrong!

Engine coolant and charge air temperature sensors are both _____________ type sensors.

Correct! Wrong!

Throttle position sensors (TPS) provide a(an) _____________voltage signal.

Correct! Wrong!

NOx emissions may be reduced by

Correct! Wrong!

O2 sensors can be contaminated by

Correct! Wrong!

Fuel quantity is controlled by the PCM by signalling injector _______________.

Correct! Wrong!

Technician A says that a Mass Airflow Sensor may use a hot wire or heated film. Technician B says that a Mass Airflow Sensor may use a potentiometer. Which one is correct?

Correct! Wrong!

Throttle body fuel injection uses one injector for each cylinder in the engine.

Correct! Wrong!

All multi-port fuel injection systems use sequential firing, timed to the engine firing order.

Correct! Wrong!

Technician A says that fuel regulators are always on the upstream (inlet) side of the injector. Technician B says that the fuel pressure regulator outlet is incorporated into the fuel lines returning to the tank. Which one is correct?

Correct! Wrong!

Technician A says that when the vehicle is not running there is no fuel pressure at the injectors. Technician B says that if the system is working properly, there should be residual pressure but it will be different on throttle body and multiport system. Which one is correct?

Correct! Wrong!

To prevent a buildup of excess pressure in the fuel tank, older style filter caps may have

Correct! Wrong!

To help prevent the formation of vapor in the fuel line, some filters and/or fuel pumps will have

Correct! Wrong!

Generally, with a mechanical fuel pump, motion is provided to the diaphragm by

Correct! Wrong!

All fuel line in the vehicle that are attached to the frame or engine are made of specialized composite materials or

Correct! Wrong!

In a carburetor, when air flows through and leaves the venturi, the velocity will tend to

Correct! Wrong!

The ability of a fuel to evaporate is called

Correct! Wrong!

The complete combustion of the precisely controlled fuel and air mixture in the engine cylinders is called stoichiometric ratio.

Correct! Wrong!

During heavy load operation the engine will require

Correct! Wrong!

Before beginning any service on the fuel system you should

Correct! Wrong!

Exhaust gas analyzers are designed to read emissions from the vehicle after combustion has occurred.

Correct! Wrong!

The two most important tests performed on a mechanical fuel pump are

Correct! Wrong!

For safety reasons, before removing any fuel system components you should

Correct! Wrong!

When diagnosing a poor operation complaint, and before opening any fuel system for repair, you should always check to make sure that there are not other basic problems with the vehicle''s primary and secondary electrical systems.

Correct! Wrong!

Fuel delivery to the cylinders within a modern computerized fuel system is achieved by using

Correct! Wrong!

One factor that allows accurate vehicle operation, is that the computer is constantly changing the ignition timing and fuel delivery to account for changes in vehicle operation.

Correct! Wrong!

The sensor that indicates changes due to temperature is the

Correct! Wrong!

A throttle position sensor is an example of a

Correct! Wrong!

The oxygen sensor monitors

Correct! Wrong!

Before disconnecting the battery on a computer controlled vehicle, you should

Correct! Wrong!

You can check the operation of each fuel injector solenoid by

Correct! Wrong!

Throttle body injection units are sealed for life and never need service.

Correct! Wrong!

When someone makes reference to open loop computer control, this means

Correct! Wrong!

A gasoline engine''s knock sensor may be

Correct! Wrong!

The PCM can determine the vehicle is in the deceleration mode by which of the following sensors?

Correct! Wrong!

HD Gasoline Systems
You Failed!
You Passed!

Share your Results:

Just tell us who you are to view your results!