Prepare for your examinations with a set of multiple choice questions (MCQs) related to Emission Control System for MECHANIC DIESEL Trade. The questions are likely designed to test a user’s knowledge or understanding of Mechanic Diesel concepts and may be useful for exam preparation or self-assessment. The website may be a helpful resource for individuals studying to become Mechanic Diesel or seeking to improve their understanding of Mechanic Diesel principles.

EMISSION CONTROL SYSTEM

Which hydro carbon emission is released directly from engine to the atmosphere? Crank case and exhaust system Fuel tank and carburettor Fuel tank and crank case Fuel tank and exhaust

Which engine emits more amount of nitrogen oxides (NOx)? Spark ignition engine Compressed ignition engine Two stroke engine LPG engine

Which is a greenhouse effect gas? Oշ CO COշ Nշ

Which pollutant is released more from diesel engine during weak compression? CO Particulate matter HC Nox

Which one is a non pollution gas? CO NO HC Oշ

Which of the following is the source of pollutant gases with hydrocarbon? From fuel tank evaporation From carburettor evaporation From crankcase blow by From exhaust system

Which are less harmful emission elements after conversion by catalytic converter? COշ + HC + Hշ0 NOշ + COշ + Pm Hշ0 + COշ + Nitrogen Pb+ COշ + Nox

Which is the harmful emission element produced by an internal combustion engine? COշ + HC + Hշ0 CO + HC + Nox NOx + COշ + Ph Pb + COշ + NOx

Where the positive crankcase ventilation is fitted? Muffler and air cleaner Controller and air cleaner Feed pump and air cleaner Engine breather and air cleaner

What is the use of catalytic converters? Control the noise Control the emission Control the temperature Control the fuel consumption

What is the purpose of EGR (Exhaust gas recirculation) valve? Reduces NOx Reduces CO Reduces COշ Reduces SOշ

What is the acronym for DPF in exhaust emission system? Diesel pressure filter Diesel primary filter Diesel particulate filter Direct particulate filter

What is the purpose of EVAP canister? To trap the exhaust gas To trap fresh air To trap the leak off To trap the fuel vapour

Which of the hydrocarbon emission is released after the combustion of the engine? From fuel tank From carburettor From crankcase blow by From exhaust system

What does the evaporative emission control eliminate? CO COշ HC NOx

Which engine uses EVAP canister? Diesel engine Petrol engine LPG engine CNG engine

Which is used to absorb fuel vapour in the EVAP canister? Banian cloth Cotton roll Paper filter Activated charcoal

Name the emission control technique when some amount of gases feed into the intake manifold of a running engine? Exhaust gas recirculation Positive crankcase ventilation Catalytic convention Selective catalytic reduction

What is the purpose of selective catalytic reduction (SCR)? Reduce CO2 Reduce PM Reduce NOx Reduce HC

What is the reason for the emission of particulate matter? Due to complete combustion Due to incomplete combustion Due to excess air supplied Due to atmospheric mixture

How do we achieve near zero emission diesel engine? Combo of PCV and EGR Combo of EGR and SCR Combo of PCV and 3 way catalytic connection Combo of DPF and EGR

What is the purpose of crankcase ventilation? To prevent pressure build up To prevent temperature build up To increase the blow by gas To reduce the combustion leak

What is positive crankcase ventilation? Use of back pressure to increase efficiency HC present in blow by drawn out HC present in the blow by reused Increase the crankcase dilution

Where EGR valve connected? Exhaust system and intake system Crank case and intake system Crank case and exhaust system Exhaust system and catalytic converter

For more Practice Sets- CLICK HERE