During which test should the crankshaft be locked to prevent the engine from turning?
A - NSC Mechanical Technology Automotive - Question 4 - 2023 - Paper 1
Question 4
During which test should the crankshaft be locked to prevent the engine from turning?
A. Compression test
B. Exhaust gas analysis
C. Cylinder leakage test
D. Comput... show full transcript
Worked Solution & Example Answer:During which test should the crankshaft be locked to prevent the engine from turning?
A - NSC Mechanical Technology Automotive - Question 4 - 2023 - Paper 1
Step 1
During which test should the crankshaft be locked to prevent the engine from turning?
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Answer
The correct answer is C. Cylinder leakage test. This test requires the crankshaft to be locked to prevent any movement during the assessment of the cylinder's sealing capabilities.
Step 2
Which wheel alignment angles are measured using the bubble gauge?
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Answer
The correct answer is A. Sweep volume. The bubble gauge is typically utilized for measuring angles such as the caster and camber of the wheels.
Step 3
The engine capacity of a four-cylinder 1 600 cm³ engine is ...
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Answer
The correct answer is C. 1 600 ml. This reflects the total volume of all four cylinders combined, denoted in milliliters.
Step 4
Which ONE of the following determines brake power using a clamping device with the brake arm?
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Answer
The correct answer is B. Prony brake. This device is specifically designed to measure brake power through the application of a load to the rotating shaft.
Step 5
Which ONE of the following is a cause of high carbon dioxide readings in the exhaust gas?
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Answer
The correct answer is D. Engine overheating. This condition often indicates improper combustion and can lead to increased CO2 emissions.
Step 6
The coolant of an engine cooling system is a mixture of ...
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Answer
The correct answer is A. antifreeze and water. This mixture helps to prevent freezing and boiling, ensuring optimal engine operation.
Step 7
Which ONE of the following components is part of an automatic gearbox?
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Answer
The correct answer is B. Oil pump. The oil pump plays a crucial role in providing hydraulic pressure necessary for the operation of an automatic transmission.
Step 8
The hydraulic pistons in an automatic gearbox control the ...
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Answer
The correct answer is B. valve body. The hydraulic pistons operate within the valve body to direct fluid flow and engage gears.
Step 9
Feathered tyre wear is caused by ...
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Answer
The correct answer is A. incorrect toe setting. This misalignment results in uneven tread wear and affects vehicle handling.
Step 10
Which component of the alternator controls the charging level of the battery?
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Answer
The correct answer is C. Regulator. The regulator manages the voltage output from the alternator to maintain the battery's charge.
Step 11
The amount of fuel injected decreases when the ...
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Answer
The correct answer is A. engine speed increases. As engine speed rises, the fuel injectors may adjust to maintain optimal air-fuel mixture ratios.
