Class 12 Automotive Chapter 3 Transmission System

Class 12 Automotive Chapter 3 Transmission System Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Automotive Chapter 3 Transmission System Question Answer and select need one. Class 12 Automotive Chapter 3 Transmission System Notes Download PDF. AHSEC Class 12 Elective Automotive Question Answer English Medium.

Class 12 Automotive Chapter 3 Transmission System

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Elective Automotive Textual Solutions are part of All Subject Solutions. Here we have given AHSEC Class 12 Automotive Textbook Solutions English Medium for All Chapters, You can practice these here.

Transmission System

Chapter: 3

SESSION 1: OVERHAULING OF CLUTCH

Check Your Progress

A. Fill in the blanks:

1. Diaphragm clutch is advantageous over spring clutch as it transmits more torque due to the use of a diaphragm ______________. 

Ans: Spring.

2. During the process of overhauling a clutch assembly, it is important to inspect the clutch plate for ____________ and check its thickness. 

Ans: Oil Leakage.

3. Clutch slip occurs when power transmission is not properly ____________ to the gearbox even after releasing the clutch plate. 

Ans: Transmitted.

4. A weakened diaphragm spring can be one of the causes of_____________.

Ans: Clutch Judder.

B. Multiple Choice Question Question: 

1. What type of clutch uses a diaphragm spring instead of a coil spring? 

(a) Spring clutch. 

(b) Multi-plate clutch. 

(c) Centrifugal clutch. 

(d) Diaphragm clutch.

Ans: (d) Diaphragm clutch.

2. Why is a diaphragm clutch advantageous over a spring clutch? 

(a) It has larger size. 

(b) It requires more maintenance.

(c) It transmits more torque. 

(d) It is less affected by centrifugal force Question.

Ans: (c) It transmits more torque.

3. What is the primary purpose of overhauling a clutch assembly? 

(a) To increase rotational speed. 

(b) To replace the engine.

(c) To improve fuel efficiency.

(d) To restore proper functioning and efficiency.

Ans: (d) To restore proper functioning and efficiency.

4. Clutch slip occurs when: 

(a) The clutch pedal is released slowly. 

(b) Power transmission is not transmitted to the gearbox after releasing the clutch plate. 

(c) The engine stalls. 

(d) The clutch pedal is pushed all the way to the floor.

Ans: (b) Power transmission is not transmitted to the gearbox after releasing the clutch plate.

C. Answer the following questions:

1. What is the importance of reconditioning and overhauling the clutch of a vehicle?

Ans: When the clutch runs with noise and clutch slips and it does not engage and disengage properly, it may result in jerky movement in engagement and as well as disengagement. Then it is necessary to overhaul the clutch assembly.

2. What are the functions of clutch in vehicle? 

Ans: Clutch is used to connect and disconnect the engine power to the gear box as per requirement. 

3. When is the clutch plate changed in a vehicle?

Ans: Clutch plate is changed when it is worn out, thickness is reduced or oil is leaked on the clutch plate.

4. Enlist the components of clutch system?

Ans: Pressure plate, Clutch disc, Release bearing, Flywheel.

5. What components are linked to the gear input shaft?

Ans: Clutch plate and Gear box input shaft are linked together.

6. Why the clutch springs are used in clutch plate?

Ans: Clutch springs are used to absorb torsional vibration produced in the transmission system.

SESSION 2: SERVICING OF PROPELLER SHAFT, UNIVERSAL AND SLIP JOINTS

Check Your Progress

A. Fill in the blanks:

1. If the dial gauge shows a deflection of 2 mm, it indicates that the propeller shaft is _______________. 

Ans: Bent.

2. The drive shaft is responsible for transmitting power from the _______________ to the ______________. 

Ans: Engine, wheels.

3. To prevent squeaking noise, it’s recommended to lubricate the _______________ joints and propeller shaft. 

Ans: Universal.

4. The drive shaft assembly consists of inboard joint, wheel side joint, and ______________ joint. 

Ans: Steering Knuckle.

B. Multiple Choice Questions: 

1. What is the purpose of a propeller shaft in a vehicle? 

(a) To clean the engine. 

(b) To transmit power between the gearbox and differential.

(c) To steer the vehicle. 

(d)To control suspension. 

Ans: (b) To transmit power between the gearbox and differential.

2. Which component connects the engine to the wheels and is usually made of steel? 

(a) Steering wheel. 

(b) Drive shaft. 

(c) Universal joint. 

(d) Differential gear. 

Ans: (b) Drive shaft.

3. What is the consequence of a bent propeller shaft? 

(a) Improved fuel efficiency. 

(b) Reduced noise. 

(c) No effect on performance. 

(d) Noisy operation. 

Ans: (d) Noisy operation.

4. What should be done if the universal joint cross is worn out? 

(a) Replace the propeller shaft.

(b) Clean the joint with solvent. 

(c) Replace the universal joint cross. 

(d) Lubricate the differential.

Ans: (c) Replace the universal joint cross.

SESSION 3: SERVICING OF DIFFERENTIAL UNIT AND ADJUSTMENTS

Check Your Progress

SESSION 4: TRANSMISSION SYSTEM (GEARBOX)

Check Your Progress