Maharashtra State Board of Technical Education 2011-4th Sem Diploma Automobile Engineering for in Subject :-automobile system(12098) - Question Paper
MSBTE ques. paper for Diploma in Automobile Engineering
Fourth Semester
Subject :-automobile system(12098)
12098
3 Hours/100 Marks
Seat No.
Instructions : (1) AB questions are compulsory.
(2) Illustrate your answers with neat sketches wherever necessary.
(3) Figures to the right indicate full marks.
(4) Assume suitable data, if necessary.
(5) Use of Nonprogrammable Electronic Pocket Calculator is permissible.
(6) Mobile Phone, Pager and any other Electronic Communication devices are not permissible in Examination Hall.
Marks
1. A) Attempt any six : (6x2=12)
a) Why front wheels are provided with negative caster ?
b) What is Toe-in and Toe-out ?
c) Define Camber.
d) List two functions of suspension system.
e) State function of spring bump stop in leaf spring suspension.
f) What is draw bar pull ?
g) Define tractive effort.
h) Differentiate between sway and yaw.
B) Attempt any two : (2x4=8)
a) Explain parking brake with sketch.
b) Write functions of anti roll bar and stabilizer bar in suspension system.
c) Explain Ackerman principle of steering and linkage with sketch.
2. Attempt any four :
(4x4=16)
a) Write desirable properties of brake fluids.
b) Explain the working of central locking system.
P.T.O.
c) Explain various human comfoit conditions considered in car air conditioning.
12098
d) Explain Wishbone type independent suspension system with sketch.
e) Explain concept and working of antilock braking system.
f) State the function of collapsible steering and explain its working.
3. Attenpt any four :
(4x4=16)
a) Write properties and types of refrigerants used in car aiiconditioning.
b) Distinguish between drum brakes and disc brakes.
c) Explain rolling resistance and gradient resistance faced by the vehicle.
d) Discuss the effect of streamlining on vehicle performance.
e) How temperature is controlled in automobile air-conditioning ?
4. Attempt any two : (2x8=16)
a) Draw a neat sketch of hydraulic power steering and explain its working. Write its advantages.
b) Explain Air-braking system with sketch. State its application.
c) Draw a sketch of Rack and Pinion type steering gear box and explain its
working.
5. Attempt any two :
16
a) Write necessity of independent suspension. Explain working of leaf spring and torsion bar arrangement.
b) Explain materials used for body construction and types of bodies with sketches.
c) Draw a layout of Hydraulic braking system and explain its working. State function of master cylinder.
6. Attempt any two : 16
a) Draw a layout of vapour compression system and explain its working.
b) Explain the concepts of
i) Under-steering and over-steering
ii) King pin inclination.
c) Draw sketches of
i) Telescopic shock absorber
ii) Gas filled shock absorber.
|
Attachment: |
| Earning: Approval pending. |
