Class 9 Automotive Service Technician Chapter 5 Automobile and Environment

Class 9 Automotive Service Technician Chapter 5 Automobile and Environment Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 9 Automotive Service Technician Chapter 5 Automobile and Environment Question Answer and select need one. Class 9 Automotive Service Technician Chapter 5 Automobile and Environment Solutions Download PDF. SEBA Class 9 Elective Automotive Service Technician Texbook Solutions English Medium.

Class 9 Automotive Service Technician Chapter 5 Automobile and Environment

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Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. SEBA Class 9 Elective Automotive Service Technician Textual Solutions in English are part of All Subject Solutions. Here we have given SEBA Class 9 Elective Automotive Service Technician Notes, SEBA Class 9 Elective Automotive Service Technician English Medium Textbook Solutions for All Chapters, You can practice these here.

Automobile and Environment

Chapter: 5

Session – 1: Air Pollution

Check Your Progress

A. Fill in the blanks:

1. The need of the hour is to check the _________ and ________ of our precious natural resources.

Ans: Degradation, depletion.

2. In order to control environmental pollution, the Government of India has passed the __________ Act, 1986 to protect and improve the quality of our _________ (air, water and soil).

Ans: Environment (Protection), environment.

3. Air pollutants deleteriously affect the _________ system of humans and of animals.

Ans: Respiratory.

4. The full form of CNG is __________.

Ans: Compressed Natural Gas.

5. Automobiles are a major __________ of atmospheric pollution.

Ans: Source.

6. Euro II norms, for example, stipulate that sulphur be controlled at _________ parts-per-million (ppm) in diesel and ________ ppm in petrol.

Ans: 350 and 150.

B. Multiple choice questions:

1. The latest version of emission standards to be followed in India are ________.

(a) BS-IV.

(b) BS-III.

(c) BS-II.

(d) EURO-III.

Ans: (a) BS-IV.

2. A substantial fall of which gases level was found in Delhi between 1997 and 2005 due to CNG?

(a) CO₂ and SO₂.

(b) Co₂ and Sio₂.

(c) CO and SO₂

(d) None of the above.

Ans: (c) CO and SO₂

3. An undesirable change in physical, chemical or biological characteristics of air, land, water or soil is known as ____________.

(a) Population.

(b) Pollution.

(c) Propulsion.

(d) None of the above.

Ans: (b) Pollution.

4. The Government of Delhi decided to convert all the buses to CNG by the end of year __________.

(a) 2022.

(b) 2016.

(c) 2002.

(d) 2006.

Ans: (a) 2022.

C. Short answer questions:

1. Why is it important to control air pollution?

Ans: Pollution is a big concern to the human race today. We are not able to conserve our environment properly, and if we do not act upon it, our natural resources will soon get depleted. Pollution in any form is dangerous, be it pollution of air, water or noise, and therefore, it needs to be controlled to save our environment. It is necessary for us to adopt national and international emission standards which ensure better utilisation of resources and help in controlling pollution.

Air pollutants cause injury to all living organisms. They reduce growth and yield of crops and cause premature death of plants. Air pollutants also deleteriously affect the respiratory system of humans and animals.

2. What is the role of a convertor in an automobile?

Ans: Catalytic converters, having expensive metals, namely platinum‑palladium and rhodium as the catalysts, are fitted into automobiles for reducing emission of poisonous gases. As the exhaust passes through the catalytic converter, unburnt hydrocarbons are converted into carbon dioxide and water. Also, carbon monoxide and nitric oxide are changed to carbon dioxide and nitrogen gas, respectively.

3. How has CNG helped in controlling pollution?

Ans: The Government of Delhi decided to convert all the state-run buses to CNG by the end of 2002. This resulted in a dramatic improvement in the pollution levels. You might be curious to know why CNG is better than diesel. The answer is that CNG burns more efficiently and completely. On the other hand, petrol or diesel are partly left unburnt. Moreover, CNG is cheaper than petrol or diesel, cannot be siphoned off by thieves and cannot be adulterated like petrol or diesel.

A. Fill in the blanks:

1. Burning of fuel takes place in the _________ of automobiles to give power to the vehicle.

Ans: Engine.

2. Smoke is the by-product of the _________ process.

Ans: Combustion.

3. First stage emission norms came into force for petrol vehicles in the year ________.

Ans: 1991.

4. Emission reduction achieved from pre-89 levels is __________ for petrol driven and __________ for diesel vehicles from 1991 levels.

Ans: 85% and 61%.

5. Euro II equivalent Bharat Stage II norms are in force from 2001 in the four metros of ________ and ___________.

Ans: NCR, Mumbai, Delhi, Kolkata.

B. Multiple choice questions:

1. Petrol and diesel fuels are mixtures of __________.

(a) Hydrocarbons.

(b) Carbons.

(c) Nitrogen.

(d) Carbon monoxide.

Ans: (a) Hydrocarbons.

2. Government standards generally regulate the emissions of __________.

(a) Nitrogen oxides (NO_x).

(b) Sulphur oxides (SO_x).

(c) Particulate matter (PM) or soot.

(d) All of the above.

Ans: (d) All of the above.

3. In a ‘perfect’ engine, oxygen in the air would convert all the hydrogen in the fuel to _______________.

(a) Water.

(b) Gases.

(c) Smoke.

(d) Pollution.

Ans: (a) Water.

C. Short answer questions:

1. Why is emission control important?

Ans: Proper maintenance of vehicles keeps a check on pollution by reducing the emission. Adequate measures have been taken to improve the quality of fuel, for example, lead-free fuel, CNG fuel, biofuel, etc., are being adopted in the automobile sector. Therefore, the quality of fuel plays an important role in meeting the stringent emission regulations.

2. What is Bharat Standard or Euro Standard?

Ans: Bharat stage emission standards are emission standards instituted by Government of India to regulate the output of air pollutants from internal combustion engine equipments, including motor vehicles. The standards and the timeline for implementation are set by the Central Pollution Control Board under the Ministry of Environment, Forests and Climate Change.

A. Fill in the blanks:

1. The new alternate fuel used in Delhi is _____________.

Ans: CNG.

2. Meaning of PUC is ____________, _________, ___________.

Ans: Pollution Under Control.

3. PUC is checked at ____________.

Ans: PUC centre.

4. The full form of CNG is ________ __________ ________.

Ans: Compressed Natural Gas.

5. Adulteration of fuel leads to ____________ combustion process.

Ans: Weak.

B. Multiple choice questions:

1. Which state of India has the largest number of CNG commercial vehicles running in comparison to anywhere else in the world?

(a) Maharashtra. 

(b) Punjab.

(c) Delhi. 

(d) Gujarat.

Ans: (c) Delhi. 

2. India has setup a task force for preparing the ________.

(a) Carbon road map. 

(b) Oxygen road map.

(c) Hydrogen road map. 

(d) Hydrocarbon road map.

Ans: (c) Hydrogen road map. 

C. Short answer questions:

1. What is the purpose of having PUC?

Ans: Presently, all vehicles need to undergo a periodic emission check (three months or six months) at PUC centres at fuel stations and private garages which are authorised to check the vehicles. It is mandatory for every vehicle owner to carry a valid Pollution Under Control (PUC) Certificate and maintain the vehicle within the prescribed emission norms.

2. List some tips for controlling pollution.

Ans: Some other ways to control pollution are:

(i) Keeping the car one day off in a week.

(ii) Car pooling for going to the office.

(iii) Using a bicycle for short distances.

(iv) Maintaining the vehicle properly.

(v) Using public transport to commute. Delhi Metro is the best example of controlling pollution and providing comfort to the public.

Parimol

Hi! my Name is Parimal Roy. I have completed my Bachelor’s degree in Philosophy (B.A.) from Silapathar General College. Currently, I am working as an HR Manager at Dev Library. It is a website that provides study materials for students from Class 3 to 12, including SCERT and NCERT notes. It also offers resources for BA, B.Com, B.Sc, and Computer Science, along with postgraduate notes. Besides study materials, the website has novels, eBooks, health and finance articles, biographies, quotes, and more.