Session 5: Fuel Supply System
Unit 3: Major Systems and Components of anAutomobile
Textual Question-Answers
Check Your Progress
A. Fill in the blanks
1. Air and fuel are …………… outside the engine.
Ans: mixed
2. The fuels, such as petrol, benzol and alcohol, are used in………………….. engine.
Ans: spark ignition
3. Oil fuels, which are used in CI engines, do not …………….. easily.
Ans: vaporise
4. The fuel system is controlled by the ……………….
Ans: carburettor
B. Multiple choice questions
1. Which of these is used as a fuel in IC engine?
(a) methanol
(b) LPG
(c) Benzoyl
(d) All of the above
Ans: (d) All of the above
2. The carburettor is used to …………………..
(a) mix petrol and air in the correct proportion
(b) supply fuel-air mixture to the engine
(c) Both (a) and (b)
(d) None of the above
Ans: (c) Both (a) and (b)
3. In a multi-point fuel injection, the injector is used for how manycylinder engines?
(a) Five
(b) Two
(c) Four
(d) Six
Ans: (c) Four
4. Which of the following is not an injector fault?
(a) Blue nozzle body
(b) Nozzle wetness blue nozzle body
(c) Excessive leak off
(d) Blow holes
Ans: (a) Blue nozzle body
C. Short answer questions
1. Write the importance of a fuel supply system.
Ans: The fuel supply system is important because it stores fuel, suppliesit in the correct quantity and proportion, ensures proper mixing with air, anddelivers it to the engine for efficient combustion.
2. Explain the correct method of injecting fuel in an automobile.
Ans: In an automobile, fuel is injected in a fine spray into the enginecylinder or intake manifold at the correct time and pressure so that it mixesproperly with air and burns efficiently to produce power.
