AU010801 Design of Transmission Elements B.Tech Model Question Paper : mgu.ac.in

Name of the College : Mahatma gandhi University
Department : Automobile Engineering
Subject Code/Name : AU_010_801/DESIGN OF TRANSMISSION ELEMENTS
Sem : VIII
Website : mgu.ac.in
Document Type : Model Question Paper

Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/4973-AU_010_801.pdf

MGU Design of Transmission Elements Question

B.TECH. DEGREE EXAMINATION, MAY 2014
Eighth Semester
Branch: Automobile Engineering

Related : Mahatma gandhi University AU010805G01 System Modeling & Simulation B.Tech Sample Question Paper : www.pdfquestion.in/4976.html

(Regular/Supplementary)
Time: Three Hours
Maximum Marks: 100
Answer one full question from each module Use of Design Data Book is permitted. .
Missing Data may be assumed.

Module-1

1. A cone clutch has a cone angle of 300 and is used to transmit 10 kW at 1500rpm. The width of the face is one-fourth of the mean diameter of friction lining. The normal intensity of pressure between contact surfaces is 0.12 MPa and coefficient of friction is 0.2, assuming uniform wear, design the clutch dimensions. (25 marks) OR

2. A differential band brake has an operating lever 240mm long. The ends of the band are attached at 40mm and 120mm on either side of the pivot. The drum diameter is 600mm. Arc of contact is 3000. Design the brake to absorb 15kWat 1200 rpm. (25 marks)

Module-2

3. (a)What is the difference between thick film and thin film lubrication?
(b)The following data is given for a 360° hydrodynamic bearing,
Radial load = 3.6 kN
Journal diameter = 55 mm
Bearing length = 27.5 mm
Radial clearance = 0.05 mm
Viscosity of lubricant = 25 CP.
Somerfield number of bearing is 0.0923.
Determine (i) Journal speed; (ii) Coefficient of friction; (iii) Power loss in friction; (iv) Flow
requirement; (v) Temperature rise. (20 marks) OR

4. A journal bearing 160 mm long and 45 mm dia. supports a radial load of 8,000 N. The shaft speed is 160 rpm; oil used is SAE 60 at 25° C inlet temperature. Using clearance ratio 600, find the rise in temperature, maximum films pressure and minimum film thickness. (25 marks)

Module-3

5. (a) How do you specify the size of gear tooth? (5 marks)
(b) A pair of spur gear is to be designed. The pinion rotates at 800 rpm. and transmits 6 kW to gear rotating at 200 rpm; Starting torque can be taken as 140% of rated torque for pinion and gear allowable stress is 150 MPa. (20 marks) OR

6. (a) Explain why helical gears are capable of transmitting, grater power at high speed as compared to the spur gear. (5 marks)

(b) A pair of helical gears is to be designed to transmit 20 KW at a pinion speed of 1500 rpm. The velocity ratio is 2.5. Selecting suitable materials, determine the dimensions of the gears. (20 marks)

Module-4

7. Design a flywheel for a single cylinder, four stroke vertical cylinder diesel engine developing 4kW at 1500 rpm. Assume coefficient of speed fluctuation Cs=0.01. (25 marks)
OR

8. Design a piston for a four stroke diesel engine developing power at 1500 rpm. Other related data are the following.
(1) Piston diameter= 87mm
(2) Length of the stroke = 96mm
(3) Mean effective pressure = 0.7 N/mm2

(4) bsfc = 0.26 kg/kWh
(5) L/r ratio= 4
(6) Heat conducted through the piston crown= 10% of heat generated during combustion.
(7) Calorific value of the fuel (CV) = 42 MJ/kg
Assume that the piston is made of aluminium alloy. (25 marks)

B.Tech. Degree Examination, April-2013 :
Eighth Semester, Branch – Automobile Engineering
Special Types Of Vehicles (Au010803) :
(Sample Question Paper)
Time : Three hours
Maximum : 100 marks
Part A : (Answer all. Each question carries 3 marks)
1. What you mean by skid steering? Write the advantage of it.
2. What is an excavator-loader? Write equation to find the output of an excavator and explain terms in it.
3. Explain the advantages and disadvantages of articulated dump trucks.

4. What are the factors affecting capacity of a crane and how the rating of a crane is being done?
5. Define the word tractor. What are the types of tractors available?

Part B : (Answer all. Each question carries 5 marks)
6. Explain the types of hydraulic control systems with neat figures.
7. Explain the type of shovel-buckets with their advantages and disadvantages.
8. Draw and explain any three attachments for a lift truck.

9. Explain the parameters influencing the degree of compaction of a vibrating roller.
10. Explain the difference between a wheel dozer and crawler dozer.

Part C : (Each question carries 12 marks)
11. Explain the construction and working of an under carriage with neat sketch. OR
12. What is power takeoff? Explain different drive systems for PTO shaft with figures.

13. Explain the working of a dragline with the help of figures. Also write the equation for its production and explain what the correction factors involved. OR
14. With the suitable sketches explain various operations that can be done using a motor grader.