Automobile Emission Control Questions and Answers

Q: Motor vehicle emission consists of :

Motor vehicle emissions include carbon monoxide.Petrol and diesel engines emit carbon monoxide from incomplete combustion, along with hydrocarbons, oxides of nitrogen, particulate matter and carbon dioxide. Carbon monoxide is the largest pollutant by mass from petrol vehicles, which is why it is a core parameter in emission norms and urban air monitoring.BOD is a measure of organic pollution in water, not an air emission. Hydrogen fluoride comes mainly from aluminium smelters, brick kilns and phosphate fertiliser plants. Calcium is not a vehicle exhaust pollutant.

Q: Which regulatory authority in India is responsible for setting vehicular emission standards ?

The key gives the Ministry of Road Transport and Highways (MoRTH).Vehicle emission norms, the Bharat Stage standards, are notified by MoRTH under the Central Motor Vehicles Rules, 1989, which govern how vehicles are type-approved and registered. The Ministry of Environment, Forest and Climate Change and the CPCB advise on air quality, but the binding vehicle norms are issued through MoRTH's motor vehicle rules.The Bureau of Indian Standards sets fuel quality specifications, and NITI Aayog is a policy think tank with no regulatory role.

Q: What is the Bharat Stage (BS) emission standard applicable for petrol and diesel vehicle in India as of 2023 ?

The standard in force in 2023 is BS - VI.India moved directly from Bharat Stage IV to Bharat Stage VI for all new vehicles from 1 April 2020, skipping BS-V to bring its standards in line with Euro 6 sooner. BS-VI cut the permitted NOx from diesel cars sharply and required fuel with no more than 10 ppm sulphur. From April 2023, the second phase of BS-VI added real driving emission checks and on-board diagnostics.BS-IV was the previous standard, applicable until March 2020. BS-V was never implemented. BS-VII has not been notified.

101.

Motor vehicle emission consists of :

A.BOD
B.Carbon monoxide
C.Fluoride-HF
D.Calcium

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: B

Motor vehicle emissions include carbon monoxide.

Petrol and diesel engines emit carbon monoxide from incomplete combustion, along with hydrocarbons, oxides of nitrogen, particulate matter and carbon dioxide. Carbon monoxide is the largest pollutant by mass from petrol vehicles, which is why it is a core parameter in emission norms and urban air monitoring.

BOD is a measure of organic pollution in water, not an air emission. Hydrogen fluoride comes mainly from aluminium smelters, brick kilns and phosphate fertiliser plants. Calcium is not a vehicle exhaust pollutant.

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102.

Which regulatory authority in India is responsible for setting vehicular emission standards ?

A.Ministry of Road Transport and Highways (MoRTH)
B.Bureau of Indian Standards (BIS)
C.Ministry of Environment Forest and Climate Change (MoEFCC)
D.National Institution for Transforming India (NITI Aayog)

Exam Year(s)

MH SET - 2024, SET Exam - 2024,

Answer: A

The key gives the Ministry of Road Transport and Highways (MoRTH).

Vehicle emission norms, the Bharat Stage standards, are notified by MoRTH under the Central Motor Vehicles Rules, 1989, which govern how vehicles are type-approved and registered. The Ministry of Environment, Forest and Climate Change and the CPCB advise on air quality, but the binding vehicle norms are issued through MoRTH's motor vehicle rules.

The Bureau of Indian Standards sets fuel quality specifications, and NITI Aayog is a policy think tank with no regulatory role.

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103.

What is the Bharat Stage (BS) emission standard applicable for petrol and diesel vehicle in India as of 2023 ?

A.BS - IV
B.BS - V
C.BS - VI
D.BS - VII

Exam Year(s)

MH SET - 2025, SET Exam - 2025,

Answer: C

The standard in force in 2023 is BS - VI.

India moved directly from Bharat Stage IV to Bharat Stage VI for all new vehicles from 1 April 2020, skipping BS-V to bring its standards in line with Euro 6 sooner. BS-VI cut the permitted NOx from diesel cars sharply and required fuel with no more than 10 ppm sulphur. From April 2023, the second phase of BS-VI added real driving emission checks and on-board diagnostics.

BS-IV was the previous standard, applicable until March 2020. BS-V was never implemented. BS-VII has not been notified.

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104.

A good automobile fuel, in addition to having high calorific value, should have

A.High ignition temperature
B.High viscosity
C.Low ignition temperature
D.Moderate ignition temperature

Exam Year(s)

UGC NET - 2012,

Answer: D

A good automobile fuel should have, in addition to a high calorific value, a moderate ignition temperature. If the ignition temperature is too high the fuel will not ignite readily, and if it is too low the fuel can ignite before the spark and cause knocking and is unsafe to store. High viscosity is undesirable because it makes the fuel difficult to pump and atomise, so a moderate ignition temperature is the property needed.

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