Goa Board Class 12 Question Paper June 2019 Auto Transmission

2019 VI 07 1430 Seat No.

Time : 2 Hours Auto Transmission
Subject Code

V 3 2 3
Total No. of Questions : 5 (Printed Pages : 4) Maximum Marks : 50

INSTRUCTIONS : (i) All questions are compulsory.

(ii) Answer each question on a fresh page.

(iii) Write the number of each question and sub-question

clearly.

(iv) Figures to the right indicate full marks.

1. (A) Answer the following questions in one sentence each :

(i) What is the purpose of cushion spring in the clutch plate of single

plate clutch ? 1

(ii) What is the advantage of using thrust washer in the Differential

unit ? 1

(iii) State any two advantages of spokes type of wheel. 1

(iv) Name different types of shackles used in the suspension

system. 1

(v) List out the components of mechanical braking system. 1

(vi) State any two disadvantages of hydraulic braking system. 1

(B) (i) Draw a neat labelled sketch of the Diaphragm Clutch. 2

(ii) What is the purpose of providing more number of clutch plates

in the multiplate clutch ? 2

2. (A) Answer the following questions in short :

(i) Explain the working of centrifugal clutch. 2

(ii) Define the term “Gradient Resistance”. 2

(iii) Give functions of Gear Box. (any four) 2

(B) (i) Draw a neat labelled sketch of the Constant Velocity Universal

Joint. 2

(ii) Distinguish between Hotchkiss Drive and Torque Tube Drive.

(any four points) 2

3. (A) Answer the following questions in short :

(i) Why Styrene Butadiene rubber is preferred in the modern

tyres ? 2

(ii) Write a short note on the vehicle chassis. 2

(iii) State any four functions of the frame of the vehicle. 2

(B) (i) Draw a neat labelled sketch of the semi-floating axle. 2

(ii) Explain the constructional details of the Differential unit of a

Car. 2

4. (A) Answer the following questions in short :

(i) Give the constructional details of the conventional leaf spring

type suspension system. 2

(ii) Define the following terms :

(a) Camber Angle 1

(b) Castor angle 1

(iii) State any four advantages of ‘Rack and Pinion’ Steering

Gear. 2

(B) (i) Draw a neat labelled sketch of the wishbone type independent

suspension system. 2

(ii) State any four requirements of the suspension system. 2

5. (A) Answer the following questions in short :

(i) Explain Disc-brake of an Automobile. 2

(ii) What is the function of “Check Valve” in the master

cylinder ? 2

(iii) What is the purpose of providing Synchronizing device in the

gear box ? 2

(B) (i) Draw a neat labelled sketch of the Worm an Roller Steering

Gear Box. 2

(ii) State the functions for the following components of the Steering

System.

(a) Steering Gear Box 1

(b) Drop Arm or Pitman Arm 1