Pune University BE (Mechanical) Automobile Engineering Question Papers

B.E. (Mechanical) AUTOMOBILE ENGINEERING (2008 Pattern) (Elective – II) (Sem. – I)

Time :3 Hours]                                                                                              [Max. Marks :100

Instructions ot the candidates :

1)            Answer 3 questions from Section -1 and 3 questions from Section -II.

2)            Answers to the two sections should be written in separate answer books.

3)            Neat diagrams must be drawn wherever necessary.

4)            Pigures to the right indicate full marks.

5)            Assume suitable data, if necessary.

SECTION – I Unit – I

QIA a) What are vehicle specifications? Describe specification of any one medium motor vehicle of your choice.                                                                                                     [8]

b) Explain front engine rear wheel drive vehicle with of neat sketch. Describe its advantages and disadvantages over other layouts.                                                    [8]

OR

Q2) a) Sketch a typical layout of a passenger car and briefly describe its various parts.   [8]

b) Write note on different types of material used for chassis frame. [8]

Unit – II

Q3) a) How you will classify clutches? Describe with neat sketch function and working of multi-plate clutch.                                                                                                          [8]

b)    Explain torque converter with neat sketch.                                                                                         [8]

OR

Q4) a) What is an epicyclic Gear box? Describe its principle and working with the help of a neat sketch.                                                                                                                   [8]

b)           Draw a neat sketch of a typical differential unit in the back axle of a vehicle and explain its working.                                                                                                          [8]

 

Unit – III

Q5) a) Enumerate different types of steering gears. Discuss salient features for each of them. Explain the construction and working of a rack and pinion type steering gear. [10]

b) How the tyres are classified and rated?                                                                [8]

OR

Q6) a) Explain how the wheel alignment and it’s balancing is performed in a service station.                                                                                               [10]

b) Explain with neat sketch construction of stub axle and wheel mounting. [8]

SECTION – II Unit – IV

Q7) a) Distinguish between independent suspension and conventional suspension system.                                                                                              [10]

b) Sketch and describe disc brakes. What are their advantages? [8]

OR

Q8) a) Explain self leveling suspension system.                                          [8]

b) Explain air brake system in detail. Also state its advantages over hydraulic brake system.                                                                                                                     [10]

Unit – V

Q9) a) Explain starting system used in automobile vehicle.                      [5]

b)            Explain in brief electrical car layout.                                                               [6]

c)            Explain with neat sketch lead acid battery.                                                   [5]

OR

QIO)Write short notes on any four:                                          [16]

a)            Electronic stability control

b)            Sensors and actuators

c)            Vehicle charging system

d)            Dash board instruments

e)            Electric Horn

 

QII)Write short notes on any four:                                                                                  [16]

a)            Active safety and passive safety

b)            Air bags

c)            Vehicle performance curves

d)            Seat belt

e)            Types of Collisions

OR

Q12) a) Explain ergonomic consideration for vehicle.                                                  [6]

b) A passenger car 13349.44 N. The rolling resistance may be assumed as 44.489 N of vehicle weight. The air resistance is given by 0.00017 AVP where A = frontal area and V is car speed. The frontal area of the vehicle is 2.312 mP and car speed is 48.27 km/hr:         [10]

i)             Determine the power required to propel the vehicle on level road.

ii)           If the tractive effort available at the wheels is 1859.97, find the maximum gradient which the vehicle can climb.

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