FIGURE 5.1 below shows a periscope optical alignment gauge. Answer the questions that follow.
5.1.1 Label A–G of the gauge shown in FIGURE 5.1.
5.1.2 What is the ... show full transcript
Worked Solution & Example Answer:FIGURE 5.1 below shows a periscope optical alignment gauge - NSC Mechanical Technology Automotive - Question 5 - 2020 - Paper 1
Step 1
Label A–G of the gauge shown in FIGURE 5.1.
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Answer
A: Height bar
B: Contact bars
C: Mirror gauge
D: Periscope gauge
E: Toe gauge
F: Calculator
G: Stand
Step 2
What is the function of the optical alignment gauge shown in FIGURE 5.1?
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Answer
The purpose of the optical alignment gauge is to check the toe-in and toe-out (wheel alignment) of the vehicle.
Step 3
Give the set-up procedure, in the correct sequence, of how to calibrate the optical alignment gauge.
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Answer
Adjust the contact bars of the periscope gauge as close to the center height of the rim as possible.
Adjust the contact bars to the width of the rim.
Place the mirror gauge next to the periscope gauge and adjust the mirror gauge contact bars to mesh the bars of the periscope.
Look through the periscope and align the vertical line with the triangle by moving the pointer arm.
Loosen the wing nut and adjust the toe gauge to 'zero'.
Step 4
Explain how to correct static imbalance of a wheel and tyre assembly.
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Answer
A small mass or weight is applied to the wheel rim diametrically opposite the heavy spot.
Step 5
State THREE engine parameters which can be monitored when using the computerised diagnostic scanner.
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Answer
Speed / Power
Temperature
Voltage
Step 6
What will be the result if there is a leak in the exhaust manifold or vacuum system of a motor vehicle when a gas analyser is used?
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Answer
The analyser will give an incorrect reading.
Step 7
State THREE conditions that can be revealed by a compression test on an internal combustion engine.
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Answer
A compression test indicates whether the cylinder pressure is correct or incorrect, according to the manufacturers specifications.
