Which type of balancing is performed at high speeds?
A - NSC Mechanical Technology Automotive - Question 4 - 2021 - Paper 1
Question 4
Which type of balancing is performed at high speeds?
A. Normal balancing
B. Static balancing
C. Dynamic balancing
D. Vibrational balancing
What is the function of ... show full transcript
Worked Solution & Example Answer:Which type of balancing is performed at high speeds?
A - NSC Mechanical Technology Automotive - Question 4 - 2021 - Paper 1
Step 1
Which type of balancing is performed at high speeds?
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Answer
Dynamic balancing is performed at high speeds to account for varying forces on the wheel during motion.
Step 2
What is the function of the turn-table while performing wheel alignment checks?
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Answer
The turn-table facilitates the dynamic balancing of the wheel by allowing it to rotate and ensuring minimal resistance during the alignment process.
Step 3
The camshaft rotation for the ignition of the air and fuel mixture in a four-stroke four-cylinder engine, occurs every ... degrees.
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Answer
This occurs every 360 degrees, as each cycle of the four-stroke process involves two rotations of the crankshaft.
Step 4
Which forced induction system has the most lag?
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Answer
The non-variable type turbocharger typically has the most lag due to its reliance on exhaust gas flow to spool up.
Step 5
Indicated power can be defined as the ...
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Indicated power is the measure of power produced within the cylinders of the engine, reflected through the work done on the pistons.
Step 6
A dynamometer measures the ...
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A dynamometer measures the theoretical power developed by the engine.
Step 7
Which of the following is the cause of high levels of hydrocarbon (HC) in an internal combustion engine?
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Answer
High levels of hydrocarbon (HC) can be caused by a too lean mixture, which indicates incomplete combustion.
Step 8
What will cause a high oil pressure reading in an internal combustion engine?
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Answer
A defective oil pressure relief valve or insufficient oil in the system could cause a high oil pressure reading.
Step 9
Which component in an automatic gearbox directs the oil pressure to select the required gear ratio?
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Answer
The control valve body is responsible for directing the oil pressure in an automatic gearbox.
Step 10
How is the lock-up clutch activated in a torque converter?
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Answer
The lock-up clutch in a torque converter is activated by oil pressure.
Step 11
What is the cause of the tyre wear indicated in FIGURE 4.12 below?
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Answer
The feathered edge wear pattern can be attributed to excessive toe-in or toe-out adjustments.
Step 12
Wheel alignment is performed on a motor vehicle to achieve ...
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Answer
Wheel alignment is performed to achieve even tyre wear, which promotes longer tyre life and better handling.
Step 13
The function of a sensor in an engine-management system is to ...
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The sensor's role is to detect engine operating conditions and determine the air-fuel mixture for optimal engine performance.
