Session 4: A Transmission System (Gearbox)
Module 3: Transmission System
Textual Question-Answers
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Fill in the blanks
1. The gearbox is positioned between the engine and ……………differential in a vehicle’s drivetrain to overcome various forms ofresistance and enhance engine power.
Ans: the.
2. In maintenance of the gearbox, it’s important to carry out oil changes at regular intervals to ensure proper ……………
Ans: lubrication.
3. The …………… of the gear selective mechanism should beinspected periodically, and necessary adjustments should be provided.
Ans: linkage.
4. An automatic transmission system can change gear ratiosautomatically using a torque converter and a complex ……………system.
Ans: hydraulic.
Multiple Choice Questions (MCQs)
1. What is the primary purpose of a gearbox in a vehicle’s drivetrain?a) To amplify the engine’s noise
b) To reduce engine power
c) To overcome various resistances and enhance engine power
d) To decrease the vehicle’s efficiency
Ans: c) To overcome various resistances and enhance engine power
2. Which of the following is NOT a resistance that a gearbox helpsto overcome?
a) Air resistance
b) Gradient resistance
c) Load resistance
d) Fuel resistance
Ans: d) Fuel resistance
3. Which component is responsible for changing gear ratiosautomatically in an automatic transmission?
a) Clutch plate
b) Torque converter
c) Synchronizer ring
d) Differential gear
Ans: b) Torque converter
4. What does ATF stands for in the context of an automatic transmission system?
a) Advanced Transmission Fluid
b) Automatic Torque Factor
c) Automatic Transmission Fluid
d) Automated Transmission Feature
Ans: c) Automatic Transmission Fluid
5. Which part of the automatic transmission system replaces theclutch of manual transmissions?
a) Torque converter
b) Gear shifter
c) Synchronizer
d) Planetary gear
Ans: a) Torque converter
6. What is the function of the planetary gearing system in anautomatic transmission?
a) To regulate engine power
b) To change tyre pressure
c) To provide different gear ratios
d) To control air conditioning
Ans: c) To provide different gear ratios
Answer the following questions
1. What are main components of automatic transmission?
Ans: Torque converter, planetary gear set, hydraulic system, valves, sensors, Electronic Control Module, and Automatic Transmission Fluid.
2. How many types of automatic transmission are used in a vehicle?
Ans: Four types of automatic transmission are commonly used: TorqueConverter Automatic, Automated Manual Transmission, ContinuouslyVariable Transmission, and Dual Clutch Transmission.
3. State the working principle of automatic transmission.
Ans: Automatic transmission works on hydraulic pressure and electroniccontrol, where the torque converter transmits power and the planetary gearsystem automatically changes gear ratios based on vehicle speed and load.
Activity
1. Demonstrate the different types of Gear Box and find the differencebetween them by identifying their features.
Ans: The activity should include comparison of manual gearbox, automatic gearbox, AMT, CVT, and DCT based on gear changing method, clutch operation, driver involvement, fuel efficiency, and driving comfort.
