Conventional Fuels for IC Engines

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Questions and Answers

Why are solid fuels not commonly used in internal combustion engines?

  • They are expensive.
  • They are not efficient in combustion.
  • They produce toxic gases.
  • They are difficult to handle and store. (correct)

What is a major advantage of gaseous fuels over solid fuels in internal combustion engines?

  • They produce less heat.
  • They are easier to dispose of.
  • They mix more homogeneously with air. (correct)
  • They are cheaper.

Why are gaseous fuels considered ideal for internal combustion engines?

  • They are cheaper than solid fuels.
  • They are easier to handle than liquid fuels.
  • They produce less residue after combustion.
  • They eliminate distribution and starting problems. (correct)

What restricts the use of gaseous fuels in automobiles?

<p>Storage and handling problems. (B)</p> Signup and view all the answers

Why were solid fuels like finely powdered coal attempted in the early stages of engine development?

<p>To explore alternatives to liquid fuels. (B)</p> Signup and view all the answers

What is a primary reason for the limited practical application of solid fuels today?

<p>Storage and feeding complications. (B)</p> Signup and view all the answers

What is a major disadvantage of nozzles that tend to dribble?

<p>Their spray angle is too narrow. (A)</p> Signup and view all the answers

What is a notable advantage of multi-hole nozzles compared to other types?

<p>Ability to distribute fuel properly with lower air motion. (A)</p> Signup and view all the answers

Which component is commonly used in vehicles as part of a fuel injection system?

<p>Bosch-type Fuel Pump (C)</p> Signup and view all the answers

What is the function of the electric motor in a Bosch-type fuel pump?

<p>To drive the pumping mechanism (C)</p> Signup and view all the answers

Why is a pressure regulator included in some Bosch-type fuel pumps?

<p>To ensure optimal engine performance (C)</p> Signup and view all the answers

What is crucial for efficient fuel atomization and combustion in an engine?

<p>Delivering pressurized fuel (A)</p> Signup and view all the answers

What is the primary reason for considerable research efforts being made to improve gas engines?

<p>To address the risks and expenses associated with liquefied gaseous fuels (C)</p> Signup and view all the answers

Which of the following is NOT a common type of fuel additive mentioned in the text?

<p>Diesel Ignition Enhancers (D)</p> Signup and view all the answers

What is the main purpose of using fuel stabilizers in engines?

<p>To prevent fuel degradation and oxidation during storage (B)</p> Signup and view all the answers

Why can dependence on fossil fuels pose risks to energy security?

<p>Due to the limited number of exporting countries (C)</p> Signup and view all the answers

Which fuel additive type helps prevent the formation of wax crystals in diesel fuel?

<p>Anti-gelling Agents (C)</p> Signup and view all the answers

What is the primary environmental impact associated with fossil fuels mentioned in the text?

<p>Increase in air and water pollution (D)</p> Signup and view all the answers

What is the main purpose of cetane boosters in diesel fuel?

<p>To raise the cetane number for better ignition and combustion (B)</p> Signup and view all the answers

Why are fossil fuels considered non-renewable resources?

<p>As they will eventually run out and are finite (C)</p> Signup and view all the answers

What is the main function of detergents as fuel additives?

<p>Clean and remove deposits from various engine parts (D)</p> Signup and view all the answers

How do lubricity improvers affect engine components?

<p>Enhance lubricating properties, reducing friction and wear (B)</p> Signup and view all the answers

What is the primary function of the fuel feed pump in an internal combustion engine?

<p>Delivering fuel from the fuel tank to the engine at required pressure (D)</p> Signup and view all the answers

Which alternative fuel is derived from algae and can be grown using sunlight and carbon dioxide?

<p>Algae-based fuels (B)</p> Signup and view all the answers

Why might economies heavily dependent on fossil fuels be vulnerable?

<p>Fluctuations in global energy prices affecting economic stability (C)</p> Signup and view all the answers

What is a significant technical challenge associated with transitioning to alternative energy sources?

<p>Addressing infrastructural challenges (B)</p> Signup and view all the answers

Which of the following is a cleaner-burning alternative to traditional gasoline or diesel?

<p>Propane (B)</p> Signup and view all the answers

Why are renewable energy sources providing increasing competition to fossil fuels?

<p>Decreasing costs of renewable energy sources (D)</p> Signup and view all the answers

In which stage does the fuel feed pump pressurize fuel in an internal combustion engine?

<p>Pressure Stage (C)</p> Signup and view all the answers

Which of the following is NOT an example of an alternative/non-conventional fuel?

<p>$Natural Gas (CNG)$ (A)</p> Signup and view all the answers

What is a challenge associated with transitioning away from fossil fuels to sustainable energy sources?

<p>$Maintaining economic stability for reliant industries$ (D)</p> Signup and view all the answers

What type of fuel injection system delivers fuel directly into the engine cylinders in a precise manner?

<p>Direct Injection (D)</p> Signup and view all the answers

Which type of fuel feed system mixes air and fuel in a fixed ratio before entering the engine cylinders?

<p>Carburetor System (B)</p> Signup and view all the answers

In which type of injection system is fuel injected directly into the combustion chamber instead of the intake manifold?

<p>Direct Injection (C)</p> Signup and view all the answers

What is the function of a nozzle in the injector?

<p>Spraying liquid fuel into the combustion chamber (A)</p> Signup and view all the answers

Which type of nozzle provides a spray operating at low injection pressures and avoids weak injection and dribbling?

<p>Pintle Nozzle (C)</p> Signup and view all the answers

In a Direct Injection system, where is the fuel injected?

<p>Directly into the combustion chamber (D)</p> Signup and view all the answers

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