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6.1 Name THREE engine parts that are indirectly driven by the crankshaft - NSC Mechanical Technology Automotive - Question 6 - 2022 - Paper 1
Question 6
6.1 Name THREE engine parts that are indirectly driven by the crankshaft. 6.2 Identify the TWO vibration dampers shown in FIGURES 6.2.1 and 6.2.2 below. 6.2.1 6.2... show full transcript
Worked Solution & Example Answer:6.1 Name THREE engine parts that are indirectly driven by the crankshaft - NSC Mechanical Technology Automotive - Question 6 - 2022 - Paper 1
Step 1
Name THREE engine parts that are indirectly driven by the crankshaft.
Answer
- Camshaft - Transfers rotational motion from the crankshaft to operate the engine's intake and exhaust valves.
- Water pump - Circulates coolant through the engine, helping to regulate temperature.
- Alternator - Converts mechanical energy from the crankshaft into electrical energy to charge the battery.
Step 2
Identify the TWO vibration dampers shown in FIGURES 6.2.1 and 6.2.2.
Answer
- Figure 6.2.1 - This damper is a combined rubber and friction disc type, designed to absorb engine vibrations.
- Figure 6.2.2 - The damper is a friction face-type, which employs a friction mechanism to reduce vibrations.
Step 3
State FOUR features, other than vibration dampers, which are built into an engine to improve balance.
Answer
- Counterweights on the crankshaft - These help evenly distribute mass and reduce vibration.
- Carefully balanced connecting rods and pistons - Ensures that these components have a uniform mass distribution.
- Equally spaced power strokes - Firing order configured for better balance.
- Dual mass flywheels - Used to reduce both engine speed fluctuations and vibrations.
Step 4
State TWO advantages of using V-type engines compared to in-line (straight) engines in motor vehicles.
Answer
- Compact design - V-type engines can fit into smaller engine compartments, saving space in the vehicle’s design.
- Improved power-to-weight ratio - Because of their design, V-type engines often produce more power for the same engine size.
Step 5