Which ONE of the following safety procedures relates to the cylinder leakage tester?
A - NSC Mechanical Technology Automotive - Question 4 - 2019 - Paper 1
Question 4
Which ONE of the following safety procedures relates to the cylinder leakage tester?
A. Use water to remove dust around the spark-plug area.
B. Clean the oil-filler ... show full transcript
Worked Solution & Example Answer:Which ONE of the following safety procedures relates to the cylinder leakage tester?
A - NSC Mechanical Technology Automotive - Question 4 - 2019 - Paper 1
Step 1
Which ONE of the following safety procedures relates to the cylinder leakage tester?
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Answer
The correct answer is D. The tester must be well tightened until no hissing sounds can be heard. This ensures safety and accuracy during the testing process.
Step 2
Which ONE of the following tests indicates the condition of an engine's piston rings?
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Answer
The correct answer is A. Cylinder leakage test. This test is designed to evaluate the integrity of the piston rings and the overall health of the engine.
Step 3
The supercharger is the most efficient and common of all forced-induction systems.
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Answer
The correct answer is C. Centrifugal. Centrifugal superchargers are widely used due to their efficiency and ease of integration into existing engine designs.
Step 4
What do you understand by the term boost with regard to turbochargers?
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Answer
The correct answer is A. The pressure accumulated by the turbocharger in the inlet manifold. Boost refers to the increased pressure that helps to improve engine performance.
Step 5
What is the unit for turning moment?
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Answer
The correct answer is B. N·m. The turning moment or torque is measured in Newton-meters.
Step 6
Which ONE of the following methods is used to raise the compression ratio of an internal combustion engine?
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Answer
The correct answer is A. Adjust the valve timing on the belt. This method can effectively increase the compression ratio and enhance the engine’s performance.
Step 7
Which ONE of the following safety measures must be considered while setting up the oil pressure tester? Make sure that …
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Answer
The correct answer is C. You do not open the radiator cap when the engine is hot. This is a critical safety measure to prevent burns and ensure accurate pressure readings.
Step 8
What will be the mechanical efficiency of an engine, if the brake power of the engine is 66 kW and the indicated power is 75 kW?
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Answer
To calculate mechanical efficiency, use the formula:
What will be the gear ratio of a gear system, if the driver gear has 25 teeth and the driven gear 100?
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Answer
The gear ratio can be calculated using the formula:
ext{Gear Ratio} = rac{ ext{Number of teeth on driven gear}}{ ext{Number of teeth on driver gear}} = rac{100}{25} = 4:1
Thus, the correct answer is B. 4 : 1.
Step 10
What do you understand by the term torsional vibration in relation to
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Answer
This question is incomplete and requires further context to provide an accurate answer.
Step 11
Which ONE of the following methods is used to increase the output frequency of the alternator?
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Answer
The correct answer is B. Increase the number of turns of the wire on the rotating coil. This method will increase the frequency of the output.
Step 12
What does it mean if a fuel pump is referred to as a wet pump? It means …
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Answer
The correct answer is A. that the pump feeds the fuel from the fuel tank at predetermined pressure. Wet pumps are designed to maintain pressure levels efficiently.
