Series OSS                                                                                                                                Code No. 107

Time allowed : 3 hours                                                                                                          Max. Marks: 30

                                                                                AUTO ENGINEERING
                                                                                         (Theory)

Note :
(i)    Attempt any five questions.
(ii)    All questions carry equal marks.

 

 

1. (a)    What is a two-stroke engine ?                               2
    (b)    What is the function of valves in an engine ?                              2
    (c)    Give any  two qualities of a good bearing.                          2

 

2. (a)    Sketch a simple U-joint and name its different parts.                                           3
    (b)    What is the function of a differential ?                                    3

 

3. (a)    Explain the working of a disc brake system.                         4
    (b)    Describe the function of a braking system.                                2

 

4. (a)    Explain Ackerman’s principle of steering system.                             4
    (b)    What are the functions of a front axle ?                            2

 

5.    Explain, in detail, the function and working of a shock-absorber.                                6

 

6. State the function of a car wheel. What is tyre tread ? How is retreading done ?

 

7. (a) Name the materials used for the following :
(i)      Torsion bar
(ii)     Propeller shaft
(iii)    Piston
(iv)    Disc brake
   (b) Write short notes on toe-in and toe-out.