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8.1 State FOUR safety requirements to meet during the setting up of the gas analyser on an internal combustion engine - NSC Mechanical Technology Automotive - Question 8 - 2020 - Paper 1
Question 8
8.1 State FOUR safety requirements to meet during the setting up of the gas analyser on an internal combustion engine. 8.2 State THREE safety precautions to adhere ... show full transcript
Worked Solution & Example Answer:8.1 State FOUR safety requirements to meet during the setting up of the gas analyser on an internal combustion engine - NSC Mechanical Technology Automotive - Question 8 - 2020 - Paper 1
Step 1
State FOUR safety requirements to meet during the setting up of the gas analyser on an internal combustion engine.
Answer
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Ensure that there are no leaks in the exhaust, manifolds, or vacuum system. The vehicle should create a safe testing environment.
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The test must be conducted in a well-ventilated area to prevent harmful gas accumulation.
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Verify that the tester battery connection is secure and functional before use.
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Position the tester so that it cannot fall onto the engine or off the engine, preventing any potential accidents.
Step 2
State THREE safety precautions to adhere to when setting up the fuel pressure tester on an internal combustion engine.
Answer
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Ensure that the tester is placed where it can be safely monitored before removing the sender unit.
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Utilize the correct adapter for the engine to avoid misreading or possible damage.
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Confirm that the pressure relief valve is functioning appropriately to prevent pressure build-up.
Step 3
Explain the difference between a compression test and a cylinder leakage test performed on an internal combustion engine.
Answer
The compression test is conducted to assess the pressure generated within the cylinder when the engine is cranked, providing insight into the engine's overall condition. Conversely, the cylinder leakage test determines if compression is being lost during operation, indicating possible issues within the cylinder or surrounding components.
Step 4
State FOUR safety precautions to adhere to while setting up a compression tester on an engine.
Answer
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Make sure the tester can be securely connected to the spark plug hole before removal.
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Clean the spark plug holes with compressed air to eliminate debris that could cause damage.
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Disable the fuel supply to prevent any fuel-related accidents during the test.
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Always ensure the ignition system is disabled to avoid accidental engine starts while conducting the test.
Step 5
Complete TABLE 8.5 by adding another TWO possible causes and another TWO corrective measures at each fault.
Answer
Oil pressure too low:
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Possible Causes:
- Faulty oil pressure sensor.
- Oil leaks within the engine components.
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Corrective Measures:
- Replace the oil pressure sensor as needed.
- Inspect for leaks and repair any damaged seals or gaskets.
Oil pressure too high:
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Possible Causes:
- Excessive oil viscosity due to incorrect oil grade.
- Faulty oil pressure relief valve leading to pressure build-up.
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Corrective Measures:
- Use the correct viscosity oil as recommended by manufacturer specifications.
- Replace the defective oil pressure relief valve to regulate pressure properly.