What is the purpose of crank case ventilation?
A. To prevent pressure build up
B. To prevent temperature build up
C. To increase the blow by gas
D. To reduce the combustion leak
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Where EGR valve connected?
A. Exhaust system and intake system
B. Crank case and intake system
C. Crank case and exhaust system
D. Exhaust system and catalytic converter
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A . . . . . . . . reduction of cold-start HC has been achieved.
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In a petrol fuel injected engine, the air and fuel are mixed in the
A. Throttle body
B. Intake manifold chamber
C. Intake ports
D. Combustion chambers
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Reduction of formation of pollutants is achieved by:
A. Reducing evaporative emissions
B. Re-designing the engine
C. Closed crankcase ventilation
D. All of these
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Pune-based organisation . . . . . . . . conducted a study using a 15% M - 15 methanol blend in vehicles and tested them for 3,000 km to evaluate emissions in real-world conditions as well as to check the performance of the vehicles.
A. Automotive Research Association of India (ARAI)
B. Research Association of India (RAI)
C. Automotive Organisation (AO)
D. Vehicle Organisation of India (VOI)
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Why are lead compounds added in petrol?
A. Reduce knocking
B. Reduce HC emission
C. Reduce exhaust temperature
D. Increase power output
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Idling co-emission for all two and three wheeled petrol vehicles should not exceed . . . . . . . . by volume.
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More than 90 to 95% of carbon particles originally generated within an engine are thus converted to CO
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The exhaust of CI engines does not contain solid carbon soot particles that are generated in the fuel-rich zones within the cylinder during combustion.
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Which engine emits more amounts of nitrogen oxides (NOx )?
A. Spark ignition engine
B. Compressed ignition engine
C. Two stroke engine
D. LPG engine
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EGR combines with the exhaust residual left in the cylinder from the previous cycle to effectively reduce the . . . . . . . . . combustion temperature.
A. Minimum
B. Maximum
C. Unpredictable
D. None of the mentioned
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When scavenging is done, some of the air and fuel mix with the exhaust gases and are expelled out of the cylinder before the exhaust port closes.
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The main function of the intake manifold is that it
A. Cools the intake air to a suitable temperature
B. Promotes the mixture of air and fuel
C. Reduces intake noise
D. Distributes intake air equally to the cylinders
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EGR system recirculates a smallmetered amount of the inert exhaust gas back into the intake manifold:
A. To reduce the combustion temperature and lower the formation of N2
B. To reduce peak combustion temperature and lower the formation of NO
C. To increase peak combustion temperature and lower the formation of NO
D. To reduce the exhaust gas temperature and lower the formation of particulate matter
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A single soot particle may contain up to . . . . . . . . carbon spheres.
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The liquid-vapour separator is located in the
A. Fuel tank
B. Carburettor
C. Canister
D. Purge valve
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Why is the fumigation technique used?
A. To control HC
B. To control NOx
C. To control CO
D. To control smoke
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How do we achieve near zero emission diesel engines?
A. Combo of PCV and EGR
B. Combo of EGR and SCR
C. Combo of PCV and 3 way catalytic connection
D. Combo of DPF and EGR
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Name the emission control technique when some amount of gases feed into the intake manifold of a running engine?
A. Exhaust gas recirculation
B. Positive crank case ventilation
C. Catalytic convention
D. Selective catalytic reduction
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