Wednesday, August 31, 2016
S.B. Roll No. _____________
CHASSIS, BODY & TRANSMISSION
Time 3 hrs
Note : Q No 1 is COMPULSORY
From remaining attempt four questions, draw neat sketches wherever necessary
Write the correct answer from the choices given
(a.) The number of points at which the engine-clutch-gear box unit is supported on the chassis frame isone, two, three, four
(b) The Chassis frame may get distorted to a parallelogram shape due to-weight of the vehicle, weight of the passengers, cornering force, wheel impact with obstacles on the road.
(c) A clutch is usually designed to transmit maximum torque, which is - equal to the maximum engine torque, 80% of the maximum engine torque, 150% of the maximum engine torque, none of these
(d) The inertia of the rotating parts of the clutch should be- minimum, maximum, zero, none of these.
(e) In a a simple planetary gear set, the out put member to increase torque is always the-sun gear, ring gear, planet carrier, none of these.
(f) In a simple epicyclic gear set, the output member to increase torque in reverse is always the- ring gear, planet carrier, sun gear, none of these.
(g) Critical whirling speed of a shaft is increased by- increasing its length, decreasing its length, decreasing its diameter, none of these.
(h) The function of a universal joint is to allow the propeller shaft to - change length, bend sideways, transfer torque at an angle, change the inclination.
(i) The type of wheel which cannot be used with a tube less tyre is- disc wheel, wire wheel , light alloy wheel, composite wheel.
(j) The types of wheels preffered in sports cars are- disc wheels, wire wheels, magnesium alloy wheels, aluminium alloy wheels.
Q2. (a) Name the components of an automobile chassis suitably mounted
(b) Classify the chassis of an automobile with brief description of each
Q 3. What is the function of a clutch? Discuss the various factors affecting the TORQUE Transmission in a Clutch
Q4. With the help of neat sketch explain the process of Torque Transmission in a Fluid Flywheel. Also discuss advantages and disadvantages of Fluid Flywheel
Q5. Discuss the functions and necessity of Transmission System
Q6. Explain with the help of neat diagram the Construction of a Propeller Shaft.
Q7. Discuss the importance of Wheels & Tyres in an Automobile and mention the requirements of an automobile wheel.
Q8. Write short notes on any TWO:-
(a) Tubeless Tyres
(b) Causes of excessive tyre wear
(c) Semi floating & fully floating axles
(d) Centrifugal Clutches
(e) Body Upholstery.
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