Diagnosing and Repairing Fuel Systems



1.	Which of the following can be safely used around an open fuel system?
	A.	Trouble light.
	B.	Welder.
	C.	Electric motor.
	D.	Battery-powered flashlight.

2.	Which of the following describes the tailpipe of an engine operating at a stoichiometric ratio?
	A.	Oily deposits.
	B.	Sooty deposits.
	C.	Tan coloration.
	D.	Black coloration.

3.	How does the MAP reading differ as altitude above sea level increases 1,000 feet?
	A.	MAP reading decreases about 1″ of mercury.
	B.	MAP reading increases about 1″ of mercury.
	C.	MAP reading increases about 2″ of mercury.
	D.	MAP reading does not change with altitude.

4.	Which of the following is a symptom of carbon monoxide poisoning?
	A.	Dizziness.
	B.	Headache.
	C.	Nausea.
	D.	All of the above.

5.	What does a low humming noise coming from the fuel tank indicate?
	A.	The fuel gauge is receiving voltage.
	B.	The fuel pump is receiving voltage.
	C.	The fuel pressure regulator is working.
	D.	None of the above.

6.	With safety in mind, which of the following should you double-check for upon completing fuel system repairs?
	A.	Proper fuel flow.
	B.	Proper air-fuel ratio.
	C.	Leaks.
	D.	Proper fuel pressure.

7.	Which of the following is associated with a leaking fuel pressure regulator diaphragm?
	A.	Rich fuel condition.
	B.	Weak fuel condition.
	C.	Clogged fuel line.
	D.	Clogged fuel injector.

8.	Aside from personal safety concerns, what may be the result of bypassing a safety device?
	A.	Legal consequences for you.
	B.	Legal consequences for your employer.
	C.	Fuel system electronics damage.
	D.	All of the above.

9.	What may result from removing fuel filters without correct tools?
	A.	Fuel line connector damage.
	B.	Fuel leak.
	C.	Potential fire.
	D.	All of the above.

10.	All injectors can be cleaned using injector cleaning solvents.
	A.	True.
	B.	False.

Log In

The resource you requested requires you to enter a username and password below:

Username:
Password: