QUESTION 9: SYSTEMS AND CONTROL (AUTOMATIC GEARBOX) (SPECIFIC)
9.1 State TWO main differences between an automatic gearbox and a manual gearbox - NSC Mechanical Technology Automotive - Question 9 - 2018 - Paper 1
Question 9
QUESTION 9: SYSTEMS AND CONTROL (AUTOMATIC GEARBOX) (SPECIFIC)
9.1 State TWO main differences between an automatic gearbox and a manual gearbox.
9.2 State TWO adva... show full transcript
Worked Solution & Example Answer:QUESTION 9: SYSTEMS AND CONTROL (AUTOMATIC GEARBOX) (SPECIFIC)
9.1 State TWO main differences between an automatic gearbox and a manual gearbox - NSC Mechanical Technology Automotive - Question 9 - 2018 - Paper 1
Step 1
State TWO main differences between an automatic gearbox and a manual gearbox.
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Answer
An automatic gearbox does not have a clutch pedal, whereas a manual gearbox requires a clutch pedal for changing gears.
An automatic gearbox shifts gears automatically, while a manual gearbox requires the driver to change gears manually.
Step 2
State TWO advantages of an automatic gearbox.
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Answer
It reduces driver fatigue as there is no need to manually engage the clutch or shift gears.
It ensures smooth driving by preventing wheel spin under adverse road conditions.
Step 3
State TWO functions of a torque converter.
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Answer
The torque converter transfers engine torque to the transmission while also multiplying the engine torque.
It dampens engine vibrations, providing a smooth operation through the transmission.
Step 4
Label parts A–E of the torque converter.
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Answer
A – One-way clutch / Turbine
B – Turbine / Impeller
C – Pump
D – Turbine shaft
E – Gearbox housing
Step 5
State FIVE different gear drives that can be obtained with the help of a single epicyclic gear train.
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Answer
Overdrive forward
Overdrive reverse
Gear reduction forward
Gear reduction reverse
Direct drive
Step 6
What is the purpose of gear ratios in the gearbox of a motor vehicle?
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Answer
Gear ratios are used to utilize the engine's torque effectively across different speeds, allowing the vehicle to perform optimally under varying driving conditions.
