Automotive Pollution and Control Mid - I, September - 2014

1.The most accurate wet method uses ________acid
  • Phenol
  • HCL
  • phenoldisulphonic
  • sulphuric
Answer: C
2.Alkyl nitriles can be trapped in the bags of the _________system
  • CVS
  • CRM
  • CPM
  • GCR
Answer: A
3.Instruments most commonly in use for emission measurement are based upon ________principle.
  • Diffraction
  • polarization
  • refraction
  • adsorption
Answer: D
4.Among the major engine variables that affect NO emissions are
  • Equivalence Ratio
  • Burned gas fraction (Residual gas plus EGR if any)
  • Excess air, Spark Timing
  • All
Answer: D
5.Advancing the start of injection in the diesel engine produces
  • Lean mixtures
  • decreasing the combustion efficiency
  • increasing the amount of 21 Unburned diesel fuel
  • all of the above
Answer: D
6.Effect of Lead in SI Engine
  • Anti-Knock compounds
  • pre-ignition
  • Detonation
  • all of the above
Answer: A
7.If the injection pressure is lower than specified, it may be lead to exhaust smoke Black
  • White
  • Blue
  • Dark gray
Answer: B
8.Air pollution can be reduced by
  • Slow warm up
  • Faster acting choke
  • Increasing air fuel mixture slightly rich
  • Increasing spark advance
Answer: B
9.The pollutants for petrol engine are measured in
  • g/kg
  • g/km
  • g/k W
  • g/ kWh
Answer: B
10.In a _________engine, the fuel is injected into the cylinder just before ignition.
  • CI
  • SI
  • both CI and SI
  • stratified charge
Answer: D
11.The chemical formula for hydrogen cyanide is_____________
Answer: HCN
12.Abbreviate CBD cycle :- ________________
Answer: Central business district
13.Instruments most commonly in use for emission measurement are based upon ________principle.
Answer: Adsorption
14.Multi-point fuel injection injects fuel into the_____________ just upstream of each cylinder's
Answer: Intake ports
15.Common rail technology makes available provides better fuel ______________
Answer: Atomization
16.EGR works by recirculation a portion of an engine's_________ back to the engine cylinders
Answer: Exhaust gas
17.Air pollution can be reduced by keeping the surface area of ________________ less.
Answer: Combustion chamber
18.The pollutants for diesel truck engine are measured in_______________
Answer: G/KWH
19.In catalytic converter, Platinum converts ______________into_______________
Answer: CO & CO2
20.Internal combustion engines produce__________ as a result of incomplete fuel combustion.
Answer: Soot