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IP Review Questions > Emissions > Flashcards

Emissions Flashcards

0
Q

A three way catalytic converter is a:

a. Reduction catalytic converter
b. Oxidizing catalytic converter
c. A and B
d. Normal catalytic converter
A

c. A and B

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1
Q

A two way catalytic converter is a:

a. Reduction catalytic converter
b. Oxidizing catalytic converter
c. Pre-heated catalytic converter
d. Normal catalytic converter
A

b. Oxidizing catalytic converter

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2
Q

Reduction catalytic converters reduce which emission gases?

a. Hydro carbons
b. Carbon monoxide
c. Carbon dioxide
d. NOx
A

d. NOx

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3
Q

Oxidizing catalytic converters reduce which emission gases?

a. Hydro carbons
b. Carbon monoxide
c. A and B
d. NOx
A

c. A and B

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4
Q

What is the material in a two way catalytic converter that helps reduce emission gases?

a. Water and carbon dioxide
b. Aluminum and bronze
c. Platinum and palladium
d. Brass and silver
A

c. Platinum and palladium

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5
Q

What is the material in a three way catalytic converter that helps reduce emission gases?

a. Water, carbon dioxide, and nitrogen
b. Aluminum, bronze, and copper
c. Platinum, palladium and rhodium
d. Brass, silver, and gold
A

c. Platinum, palladium, and rhodium

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6
Q

Where does the air pump inject the air into?

a. Exhaust manifold
b. Carburetor
c. Intake manifold
d. Air cleaner housing
A

a. Exhaust manifold

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7
Q

When a catalytic converter is cold, it:

a. Functions at 50% efficiency
b. Functions at 100% efficiency
c. Functions at 25% efficiency
d. Does not function at all
A

d. Does not function at all

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8
Q

A catalytic converter has an engine input of 100 PPM HC and an output of 200 PPM HC. How efficient is the catalytic converter?

a. 100%
b. 80%
c. 60%
d. 40%
A

b. 80%

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9
Q

When using an exhaust analyzer, the exhaust probe tip must be inserter up the tail pipe:

a. At least 2 cm
b. 10 cm
c. 20 cm
d. Fully so it cannot draw in any air
A

d. Fully so it cannot draw in any air

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10
Q

The three primary regulated emission gases are:

a. O2, CO2, and HC
b. O2, HC, and NOx
c. CO, HC, and NOx
d. HC, CO2 and NOx
A

c. CO, HC, and NOx

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11
Q

NOx is produced under which condition?

a. Rich AFR
b. A thermostat stuck open
c. A leak in the exhaust system
d. High combustion temperature
A

d. High combustion temperature

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12
Q

High levels of O2 in the exhaust sample indicate:

a. A rich AFR
b. A lean AFR
c. A leak in the exhaust system
d. Either B or C
A

d. Either B or C

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13
Q

If we could create perfect combustion in a gasoline engine, the only gases emitted from the tail pipe would be:

a. HC, CO, and O2
b. CO2, H2O, and N2
c. CO, O2, and NOx
d. O2, N2, and H2
A

b. CO2, H2O, and N2

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14
Q

CO is formed when there is:

a. A shortage of fuel
b. An excess of fuel
c. A shortage of oxygen
d. Either B or C
A

d. Either B or C

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15
Q

Good levels of O2 and CO2 in the exhaust can only occur when:

a. There is a lean misfire
b. There is a rich misfire
c. The AFR is correct and combustion is efficient
d. There is an electrical misfire
A

c. The AFR is correct and combustion is efficient

16
Q

If the EGR valve is open at idle:

a. The engine will run rough or stall
b. The engine idle speed will increase
c. This is a normal situation
d. CO will be reduced
A

a. the engine will run rough or stall

17
Q

A positive exhaust back pressure regulator transducer:

a. Closes an air bleed allowing vacuum to open the EGR valve
b. Uses exhaust back-pressure to open the EGR valve
c. Prevents the EGR valve from opening with a cold engine
d. Prevents back pressure from developing in the exhaust system.
A

b. Uses exhaust back-pressure to open the EGR valve

18
Q

On a computer controlled EGR system, the check engine light may come on if:

a. The EGR valve fails to operate
b. Exhaust to intake passage is plugged
c. EGR valve does not seal
d. All of the above
A

d. All of the above

19
Q

On computer controlled EGR systems, the scan tool can:

a. Provide the DTC
b. Activate the EGR valve
c. Perform the EGR system functional test
d. All of the above
A

d. All of the above

20
Q

Allowing exhaust gases into the intake manifold at the appropriate time:

a. Reduces combustion temperature, preventing nitrogen and oxygen gases from chemically bonding
b. Increase combustion temperature to burn off nitrogen oxide
c. Increase engine efficiency
d. None of the above
A

a. Reduces combustion temperature, preventing nitrogen and oxygen gases from chemically bonding

21
Q

Smog is the result of:

a. Sunlight reacting photo chemically will NOx and HC
b. Fog mixture with NOx
c. CO combining with HC and sunlight
d. CO combining with NOx
A

a. sunlight reacting photo chemically with NOx and HC

22
Q

The size of the carbon canister used on a vehicle depends on the:

a. Amount of space under the hood
b. Engine size
c. Size of the vehicle
d. Fuel carrying capacity of the vehicle
A

d. Fuel carrying capacity of the vehicle

23
Q

Purging the EVAP system is described as:

a. Capturing the vapors from the fuel tank
b. Storing vapor in the carbon canister
c. Drawing the vapors from the carbon canister
d. None of the above
A

c. Drawing the vapors from the carbon canister

24
Q

Purge systems can be controlled by:

a. The PCM
b. A thermal vacuum switch
c. A pulse width modulated solenoid
d. A and B only
e. All of the above
A

e. All of the above

25
Q

Enhanced evaporative emission systems:

a. Are PCM controlled evaporator systems
b. Can detect a very small EVAP system leak
c. Can capture vapors while refueling
d. Use PWM solenoids
A

b. Can detect a very small EVAP system leak

26
Q

While filling a vehicle with an onboard refueling vapor recovery system, it is normal for:

a. The carbon canister to get hot
b. The canister to fill with liquid fuel
c. The tank to fill slowly
d. Fuel vapors to leak into the atmosphere
A

a. The carbon canister to get hot

27
Q

Which of the following problems can be caused by a malfunctioning onboard refueling vapor recovery system?

a. Difficult or slow to fill
b. Tank overfills
c. Fuel odor
d. A and B only
e. All of the above
A

e. All of the above

28
Q

When an engine is run without a thermostat, which of the following conditions would be the most likely to result?

a. Higher HC and lower CO emissions
b. Higher NOx emissions
c. Engine overheats
d. Poor acceleration
A

a. Higher HC and lower CO emissions

29
Q

Under what conditions is a vehicle’s emission system checked with an exhaust analyzer?

a. At stall speed
b. Under heavy throttle and high speed
c. At cruising speed and moderate throttle
d. Over 100 km/h
A

a. At stall speed

IP Review Questions (7 decks)

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