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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
- Ensure that there are no leaks in the exhaust, manifolds, or vacuum system.
- Conduct the test in a well-ventilated area to avoid harmful gas accumulation.
- Make sure the battery connection of the gas analyser is secure.
- Position the tester so that it does not accidentally fall onto the engine or off the engine.
Step 2
State THREE safety precautions to adhere to when setting up the fuel pressure tester on an internal combustion engine.
Answer
- Ensure the tester can read the pressure before disconnecting the sender unit.
- Use the correct adapter for the specific engine model.
- Verify that the pressure relief valve is functioning properly.
Step 3
Explain the difference between a compression test and a cylinder leakage test performed on an internal combustion engine.
Answer
The compression test measures the pressure in the cylinders with the engine cranking, indicating the overall compression status. Conversely, a cylinder leakage test uses compressed air to determine how much air escapes from the cylinders, identifying specific leaks in the engine.
Step 4
State FOUR safety precautions to adhere to while setting up a compression tester on an engine.
Answer
- Ensure that the tester can be easily read and is in good condition.
- Clean the plug holes with compressed air to remove any debris before removing the spark plugs.
- Disable the fuel supply to prevent accidental ignition.
- Do not leave the compression tester attached during engine cranking; monitor the readings actively.
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
- Possible Causes:
- Blocked or restricted oil filter.
- Oil leaks in the system.
- Corrective Measures:
- Replace or clean the oil filter.
- Inspect and repair any leaks.
Oil pressure too high
- Possible Causes:
- Faulty oil pressure relief valve.
- Too much oil in the engine.
- Corrective Measures:
- Renew the relief valve.
- Drain excess oil from the system.