ASEP 108 - Chapter 10 Classroom Manual

A three-way catalyst is named for its ability to reduce which emissions:

NOx, CO, HC

Fresh air is allowed to enter the charcoal canister:

When the PCM purges the canister

Oxides of nitrogen (NOx) are formed when combustion temperatures reach more than:

2,500 degrees F.

To check the windings of an EVR solenoid, you should use a/an:

ohmmeter.

During an IM240 emissions test the exhaust gasses are measured in:

Grams per mile

Technician A says oil accumulation in the air cleaner may indicate the PCV valve or hose is restricted. Technician B says a restricted PCV valve or hose may result in the accumulation of moisture and sludge in the engine and engine oil. Who is correct?

Both A and B

Technician A says canister purging occurs only when conditions are right. Technician B says modern purge valves are computer controlled. Who is correct?

Both A and B

Excessive HC emissions may be caused by all of these, except:

an EGR valve stuck open.

Technician A says that if the EGR is open at idle and low speeds, the engine may stall on deceleration. Technician B says that if the EGR is open at idle and low speeds, the engine may surge during low-speed operation. Who is correct?

Both A and B

High oxygen levels are a good indicator of a rich air-fuel ratio.

FALSE