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10.1 State TWO purposes of a supercharger - NSC Mechanical Technology Automotive - Question 10 - 2017 - Paper 1
Question 10
10.1 State TWO purposes of a supercharger. 10.2 Name TWO examples of where a supercharger is used. 10.3 Turbochargers are used in heavy vehicles to increase the ... show full transcript
Worked Solution & Example Answer:10.1 State TWO purposes of a supercharger - NSC Mechanical Technology Automotive - Question 10 - 2017 - Paper 1
Step 1
State TWO purposes of a supercharger.
Answer
- The supercharger increases the pressure within the cylinder beyond atmospheric pressure, allowing for a greater intake of air and fuel, which enhances engine power output.
- It improves the overall volumetric efficiency of the engine by ensuring that more air is available for combustion.
Step 2
Step 3
Explain the principle of operation of the turbocharger.
Answer
A turbocharger operates by harnessing the exhaust gases from an internal combustion engine.
- Exhaust gases flow into the turbocharger, spinning the turbine attached to an impeller that draws in air.
- The design of the impeller allows it to push air into the intake manifold at a higher pressure.
- This increase in pressure means more air and fuel can be combusted, leading to a boost in engine power.
- As the turbo spins, it continually compresses air into the engine, increasing the overall efficiency of fuel utilization.
Step 4
Explain the basic operation of a steam turbine.
Answer
A steam turbine converts thermal energy from steam into mechanical energy to produce work.
- High-temperature steam is directed into the turbine, where it expands and pushes against the blades.
- As the steam flows over the blades, it causes them to rotate, generating mechanical power.
- The design includes nozzles that control steam flow and ensure efficiency, redirecting exhaust steam afterward.
Step 5