Janardan Rai Nagar Rajasthan Vidyapeeth 2007 Diploma Mechanical Engineering ADVANCED AUTOMOBILE MANUFACTURING SYSTEMS/ AUTOMOBILE MANUFACTURING SYSTEMS - Question Paper
JRN Rajasthan Vidyapeeth University
DIPLOMA
SEMESTER - 6
ADVANCED AUTOMOBILE MANUFACTURING SYSTEMS/ AUTOMOBILE MANUFACTURING SYSTEMS
Model Question Paper
DTA9/DTM9 ADVANCED AUTOMOBILE MANUFACTURING SYSTEMS/ AUTOMOBILE MANUFACTURING SYSTEMS
Duration : 3 Hrs. Maximum Marks : 75
Instruction:
1. Question paper is divided into Group A, Group B and Group C
2. Each Group is 25 Marks
3. Figure to the right in bracket indicate marks.
4. Good Handwriting is expected
Group A (25 Marks)
Answer any three questions (Question 1 is compulsory)
(10) (5)
Q.1: Explain the role of automobile
manufacturing industry in Indian economy development?
Q.2: Explain manufacturing processes functions in automobile manufacturing systems?
(10)
Q.3: Give
the function of master cylinder in the braking system. Why bleeding of brakes
are necessary? List common braking problems and the corrective measures. How does
the hand brake function?
(10)
Q.4: Explain laser beam machining.
What is electron beam machining?
(10)
Q.5: Explain the procedure of quality
control in automobile manufacturing system?
Group B (25 Marks)
Answer any three questions (Questions 6 is compulsory)
(5)
Q.6: Calculate the brake efficiency of
a car if it is slopped in a distance of 80 metres from a speed of 110 km/hr.
(10) (10)
Q.7: The gear ratios of a 3 speed gear
box are 3.5, 2.1 and 1 and the constant ratio of differential is 6.0. Calculate
the speed of car in each gear if the engine rpm is 3000 and the rear wheel
diameter is 60 cm?
Q.8: A plate clutch has three discs on the driving shaft and two discs on the driven shaft providing four pairs of contact surfaces. The outside diameter of the contact surface is 240 mm and inside diameter 120 mm. Assume uniform pressure and = 0.3. Find the total spring load pressing the plates together to transmit 25 kw at 1575 rpm. If there are 6 springs each of stiffness 13 KN/m and each of the contact surfaces worn by 1.25 mm, find the maximum horse that can be transmitted.
(10)
Q.9: State different kinds of gears
used in automobiles manufacturing systems?
(10)
Q.10: Find the time required for
shaping a block of 30 cm x 15 cm size in two cuts. Assume feed as 0.6 mm/stroke
and cutting speed as 14 m/min.
Group C (25 Marks)
All Questions are Compulsory.
Q.11. Fill in the blanks (Each question carries 2 Marks, Total = 10 Marks)
1. Cylindrical blocks are prepared by _________
2. Piston is prepared by _______
3. Seat angle must be ___________
4. ____________- is a gear generating process.
5. For small press forging __________ dies are used.
Q.12 Multiple choice Question (Each question carries 2 marks) (10)
1. The essential ingredient of any hardened steel is _________
a) Matensite b) Apetite c) Magnetite d) Cementite
2. Alnico magnets are made principally from iron & _________ powder.
a) aluminium b) cobalt c) Nickel d) Magnesium
3. The section which benefited to the greatest extent due to auto-industry is ________ industry
a) Plastic industry b) Machine tool industry c) Metal industry.
4. The process of strong electric current passed through metal causing local heat of joint called
_______ welding.
a) Resistance b) Projection c) Seam
5.__________ is a result attainable only when the mating part are assembled.
a) Tolerance b) Clearance c) None of these.
Q.13. Indicate whether following statements are True or False (Each question carries 1 marks, Total = 5 Marks)
(i) Cylinder blocks are prepared by casting process.
(ii) Anodizing is a process designed to protect steel from oxidation at high temperatures.
(iii) In conventional suspension system, two wheels are mounted on either side of a rigid axle.
(iv) The cutting tool used in EDM process is electrode.
(v) Hobbing is a gear generating process.
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| Earning: Approval pending. |
