Air Injection Systems Quiz

What does the air injection system force into the exhaust manifold?

• Fuel

• Water

• Air

• Oil

What helps the CAT to reach its optimum operating temperature?

• Fuel injection

• Water injection

• Air injection

• Oil injection

How is the air pump driven?

• By the fuel system

• By the water system

• By the engine or an electric motor

• By the oil system

Where does air exit the pump?

• Through a side port

• Through a bottom port

• Through a tangential outlet port

• Through a top port

What is the main function of the air injection system?

• To inject fuel into the exhaust manifold

• To inject water into the exhaust manifold

• To inject air into the exhaust manifold

• To inject oil into the exhaust manifold

What is the primary function of the diverter valve?

• To increase engine speed

• To prevent air from being injected when the vehicle is decelerating

• To inject fuel into the engine

• To control the temperature of the engine

What happens when the vehicle is accelerating or cruising in terms of vacuum?

• High vacuum allows air to flow from the pump to the exhaust manifold

• Low vacuum allows air to flow from the pump to the exhaust manifold

• High vacuum dumps air into the atmosphere

• Low vacuum dumps air into the atmosphere

What does the diverter valve contain to sense manifold air pressure?

What does the vacuum supply to the extra air valve depend on?

• Engine speed

• Engine temperature

• Air pressure

• Fuel level

What happens to air injection when the engine has warmed up?

• It is reduced to the CAT

• It is increased to the exhaust manifold

• It is stopped completely

• It is redirected to the fuel injectors