AUT108 Week 3 Quiz Gasoline Fuel Systems

Atmospheric pressure is _____ psi at sea level.

Select one:

• 14.5

• 14.6

• 14.7

• 14.8

Tech A says that high octane fuel is harder to ignite than lower octane. Tech B says that using high octane fuel in an engine designed for lower octane will produce better fuel economy and power. Who is correct?

Select one:

• Tech A

• Tech B

• Both A and B

• Neither A nor B

The most important job of the fuel system is to optimize engine performance while:

Select one:

• keeping fuel consumption and emissions to a minimum.

• keeping car owners happy with acceptable vehicle performance.

• making sure all DMV rules are adhered to.

• making sure the highest miles-per-gallon are achieved.

Which of these fuel characteristics helps to prevent the air fuel mixture from spontaneously igniting in the combustion chamber?

Select one:

• The ignition temperature

• The cetane rating

• The octane rating

• The antiknock rating

The sock typically consists of a ______, which prevents most small particles from being drawn into the fuel pump and sent through the rest of the fuel system.

Select one:

• Paper filter

• Fine mesh

• Plastic screen

• Aluminum alloy screen

The ______ is a pipe that extends above the fuel tank.

Select one:

• Fuel injector

• Fuel rail

• Fuel line

• Fuel filler neck

A return line is always provided to allow excess fuel to return to the tank.

Select one:

• True

• False

The ________ design uses a one-way valve to hold pressure in the system while the pressure tester is connected and disconnected to the fuel rail.

Select one:

• O-ring valve

• Quick-connect valve

• Schrader valve

• Fuel pressure tester valve

The vacuum created in a mechanically sound gasoline engine at sea level is between _______ of mercury.

Select one:

• 15" and 18"

• 16" and 18"

• 18" and 21"

• 19" and 23"

A throttle ______ controls air flow through the venturi and is linked to the throttle ______.

Select one:

• Valve; pedal

• Pedal; valve

• Piston; pedal

• Valve; piston