Understanding Engine Combustion Ratios
Complete combustion occurs when a fuel burns completely with oxygen, producing primarily carbon dioxide and water. For internal combustion engines, this requires a specific mixture of air and fuel.
Stoichiometric Air-to-Fuel Ratio
The ideal ratio of air to fuel required for complete combustion is called the stoichiometric ratio. For gasoline (petrol) in typical internal combustion engines, this ratio is approximately 14.7:1 by mass. This means about 14.7 parts of air are needed for every 1 part of fuel.
Selecting the Correct Option
Comparing the theoretical value of 14.7:1 with the given options:
- 14.6
- 11.2
- 12.1
- 15.5
The value 14.6 is the closest to the standard stoichiometric air-to-fuel ratio for complete combustion in internal combustion engines.
Important Questions from Energy and Environment - Teaching
- Arrange the following states of India in the increasing order of total installed capacity of renewable power as of August, 2025.
A. Uttar Pradesh
B. Gujrat
C. Tamil Nadu
D. Karnataka
Choose the correct answer from the options given below: - Which of the following aims to improve thermal comfort and reduce energy use in residential buildings?
- Arrange the steps of conducting energy audit of a building
A. Site inspection of auditor
B. Analizing the past pattern of energy use
C. Auditor-client meeting
D. Implementation of auditor's recommendation
E. Auditor's report
Choose the correct answer from the options given below: - Diagonal lines in interiors suggest :
- Which of the following fuels has the highest HHV carbon intensity ?
