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.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
An automatic gearbox does not have a clutch pedal, whereas a manual gearbox requires the driver to operate the clutch pedal.
In an automatic gearbox, gears are changed automatically without driver intervention, while in a manual gearbox, the driver must change the gears manually.
Step 2
State TWO advantages of an automatic gearbox.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
An automatic gearbox reduces driver fatigue, as there is no need for constant clutch operation and gear shifting, making driving easier, especially in heavy traffic.
It provides better control under various driving conditions by automatically adjusting the gear ratios to maximize efficiency and performance.
Step 3
State TWO functions of a torque converter.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The torque converter transfers engine torque to the transmission, multiplying the engine's power effectively during acceleration.
It dampens engine vibrations, ensuring smoother operation and providing a hydraulic link between the engine and the transmission.
Step 4
Label parts A–E of the torque converter.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
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.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
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?
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Gear ratios are used to optimize the vehicle's performance by adjusting the engine speed relative to the wheel speed, allowing for better acceleration, efficiency, and control under different driving conditions.
