FIGURE 5.1 below shows equipment that is used in the automotive workshop - NSC Mechanical Technology Automotive - Question 5 - 2018 - Paper 1
Question 5
FIGURE 5.1 below shows equipment that is used in the automotive workshop. Answer the questions that follow.
5.1.1 Identify the equipment in FIGURE 5.1.
5.1.2 Label... show full transcript
Worked Solution & Example Answer:FIGURE 5.1 below shows equipment that is used in the automotive workshop - NSC Mechanical Technology Automotive - Question 5 - 2018 - Paper 1
Step 1
5.1.1 Identify the equipment in FIGURE 5.1.
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Answer
The equipment in FIGURE 5.1 is a compression tester.
Step 2
5.1.2 Label parts A–D.
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Answer
Part A is the flexible piping / hose / tubing.
Part B is the adaptor screw / fitting / attachment / connector.
Part C is the gauge.
Part D is the pressure release valve.
Step 3
5.1.3 Describe the purpose of the equipment.
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Answer
The purpose of a compression tester is to measure the pressure created in the combustion chamber when the piston is at top dead center on the power stroke. This helps in diagnosing the health of the engine by indicating compression levels.
Step 4
5.2 What is the function of the cylinder leakage tester?
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The function of the cylinder leakage tester is to check whether the engine leaks gases from the cylinder during the compression stroke. This is vital for assessing engine health.
Step 5
5.3 A gas analyser is used to analyse the exhaust gases of a motor vehicle. Give ONE reason why it is important to make sure that there are no leakages in the exhaust pipe.
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It is important to ensure an accurate reading of the exhaust gases, as leakages can lead to incorrect analysis of the engine's performance and emissions.
Step 6
5.4 State ONE function of a computerised diagnostic scanner.
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Answer
A computerized diagnostic scanner scans all systems on the vehicle for faults and informs what adjustments can be made after diagnosis.
Step 7
5.5 Explain the procedure to follow when checking the camber using a bubble gauge.
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Answer
To check the camber using a bubble gauge, mount the bubble gauge on to the straightened wheel. Zero the bubble gauge at the gauge zero scale, take the reading on the camber scale, and then repeat the same for the other wheel.
Step 8
5.6 Name THREE faults that can be established when performing dynamic wheel balancing.
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The plane of imbalance.
The extent of the unbalancing forces.
The sense of direction of these forces (clockwise or counter-clockwise).
Step 9
5.7 What is the purpose of the turn-tables used to adjust the wheel alignment on a motor vehicle?
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The turn-tables are used to help turn the front wheels in or out to check the wheel angles accurately.
