Vehicle Emissions Pre Test Questions with Correct
Answers
The evaporative emissions control system controls ________ ________
from being vented from the vehicle to the atmosphere. Correct Answer-
Fuel Vapors (HC)
Diesel engines typically burn less fuel to generate a given amount of
horsepower than gasoline engines. Correct Answer-True.
A catalytic converter listed as TWC controls which three pollutants that
are emitted from the vehicles exhaust. Correct Answer-Hydrocarbons
(HC), Carbon Monoxide (CO), and Nitrogen Oxides (Nox)
An acceptable spray pattern for fuel injection would be.. Correct
Answer-Cone Shaped even mist.
a 1996 and newer vehicle has an illuminated check engine light. This
indicates an emission related problem. Correct Answer-True
The OBD II system includes which of the following components..
Correct Answer-The Powertrain control module (PCM)
The Evaporative emissions system (EVAP)
The Oxygen sensor (O2)
, The A.I.R. (Air Injection Reaction) system is used to control which of
the following pollutants.. Correct Answer-Hydrogencarbons (HC)
Carbon Monoxide (CO)
diesel engines rely solely on the intense heat of compression, high
turbulence, and fine atomization of the fuel to cause combustion. Correct
Answer-True
A vehicle with the computer controlled engine is getting poor fuel
economy and is running rich. Technician A says that's a bad oxygen
sensor may be the cause. Technician B says that a bad mass air flow
(MAF) sensor may be the cause. Who is correct? Correct Answer-
Technician A and Technician B are both correct.
What type of gasses does the positive crankcase ventilation (PCV)
system prevent from escaping into the atmosphere? Correct Answer-
Blow-by
A high carbon monoxide (CO) reading would indicate? Correct Answer-
A rich mixture
Which of the following emission system devices may be on a diesel
powered vehicle. Correct Answer-A catalytic converter
A particulate Filter (trap)
An EGR system
Answers
The evaporative emissions control system controls ________ ________
from being vented from the vehicle to the atmosphere. Correct Answer-
Fuel Vapors (HC)
Diesel engines typically burn less fuel to generate a given amount of
horsepower than gasoline engines. Correct Answer-True.
A catalytic converter listed as TWC controls which three pollutants that
are emitted from the vehicles exhaust. Correct Answer-Hydrocarbons
(HC), Carbon Monoxide (CO), and Nitrogen Oxides (Nox)
An acceptable spray pattern for fuel injection would be.. Correct
Answer-Cone Shaped even mist.
a 1996 and newer vehicle has an illuminated check engine light. This
indicates an emission related problem. Correct Answer-True
The OBD II system includes which of the following components..
Correct Answer-The Powertrain control module (PCM)
The Evaporative emissions system (EVAP)
The Oxygen sensor (O2)
, The A.I.R. (Air Injection Reaction) system is used to control which of
the following pollutants.. Correct Answer-Hydrogencarbons (HC)
Carbon Monoxide (CO)
diesel engines rely solely on the intense heat of compression, high
turbulence, and fine atomization of the fuel to cause combustion. Correct
Answer-True
A vehicle with the computer controlled engine is getting poor fuel
economy and is running rich. Technician A says that's a bad oxygen
sensor may be the cause. Technician B says that a bad mass air flow
(MAF) sensor may be the cause. Who is correct? Correct Answer-
Technician A and Technician B are both correct.
What type of gasses does the positive crankcase ventilation (PCV)
system prevent from escaping into the atmosphere? Correct Answer-
Blow-by
A high carbon monoxide (CO) reading would indicate? Correct Answer-
A rich mixture
Which of the following emission system devices may be on a diesel
powered vehicle. Correct Answer-A catalytic converter
A particulate Filter (trap)
An EGR system
