EMISSION CONTROL SYSTEM - Practice Mode

1) When does a fresh charge escapes from the petrol engine exhaust?

During valve lead During valve open During valve lag During valve overlap

Correct Answer: During valve overlap

2) Which type of fuel is recommended for catalytic converter installed engines?

Leaded petrol Unleaded petrol High speed diesel Low speed diesel

Correct Answer: Unleaded petrol

3) Which reaction is irrelevant to the 3 way catalytic converters?

NO<sub>X</sub> N<sub>2</sub> + CO<sub>2</sub> Co HC H<sub>2</sub>O + CO<sub>2</sub> O<sub>2</sub> CO H<sub>2</sub>O + CO O<sub>2</sub> C CO<sub>2</sub> O<sub>2</sub>

Correct Answer: C CO<sub>2</sub> O<sub>2</sub>

4) Which type of the emission control system that blow by gases are feed in to the inlet manifold of a running engine?

Exhaust gas recirculation Crank case ventilation Positive crank case ventilation Catalytic convention

Correct Answer: Positive crank case ventilation

5) Which controls the EGR valve in modern vehicle?

Engine vacuum controlled valve Vacuum regulated valve Linear electronic controlled valve Solenoid controlled valve

Correct Answer: Linear electronic controlled valve

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