Consider the following statements with reference to supercharging of I...
Supercharging of I.C. Engines
Introduction:
Supercharging is a process of increasing the density of air entering the combustion chamber of an internal combustion engine. This allows more fuel to be burned, resulting in increased power output. Different types of compressors are used for supercharging, depending on the engine requirements.
Statement Analysis:
Let's analyze each statement given in the question:
1. Reciprocating compressors are invariably used for high degree of supercharging:
Reciprocating compressors are commonly used for high degree supercharging. They consist of a piston and cylinder arrangement, which helps in compressing the air. This statement is correct.
2. Rotary compressors like roots blowers are quite suitable for low degree of supercharging:
Rotary compressors, such as Roots blowers, are suitable for low degree supercharging. Roots blowers operate by trapping air between lobes and transferring it from the intake side to the exhaust side. This statement is correct.
3. Axial flow compressors are most commonly employed for supercharging diesel engines used in heavy-duty transport vehicles:
Axial flow compressors are commonly used in aircraft engines, but they are not commonly employed for supercharging diesel engines used in heavy-duty transport vehicles. Diesel engines in heavy-duty vehicles are typically turbocharged, not supercharged. This statement is incorrect.
4. Centrifugal compressors are used for turbocharging:
Centrifugal compressors are commonly used for turbocharging. They operate by converting kinetic energy into pressure energy. This statement is correct.
Correct Statements:
The correct statements are:
2. Rotary compressors like roots blowers are quite suitable for low degree of supercharging.
4. Centrifugal compressors are used for turbocharging.
Conclusion:
From the given statements, it can be concluded that statement 2 and statement 4 are correct. Rotary compressors like roots blowers are suitable for low degree supercharging, while centrifugal compressors are commonly used for turbocharging.
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