Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU)) B-Tech 4th Semester (Fourth Semester) 2017-18 RME402 Manufacturing Science And Technology I Question Paper
Paper Id: 140411 Roll No.
B.TECH
(SEM IV) THEORY EXAMINATION 2017-18
MANUFACTURING SCIENCE & TECHNOLOGY-I
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
a. What are the major classifications of manufacturing processes?
b. What is recrystallization temperature?
c. What is forging? What are the common forging processes?
d. What is the angle of bite for rolling and on what does it depend?
e. Distinguish between blanking and punching process.
f. Compare hot chamber and cold chamber die casting process.
g. What is the unconventional metal forming process? Enlist unconventional
metal forming processes.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
a. List and explain different defects in rolling process. Also list their causes and
remedies.
b. What is the use of power metallurgy process? Discuss the various steps
involved in power metallurgy process.
c. What is deep drawing? List and explain the different defects in deep drawing
operation.
d. How does compound die differ from progressive die? Explain the compound
die with suitable diagram.
e. What are the advantages of bottom gating system? Derive the expression for
the bottom gating system, time taken to fill the mould cavity.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
(a) What is centrifugal casting? Explain about different types of centrifugal casting
methods.
(b) Enumerate some common casting defects. Explain their causes and remedies.
4. Attempt any one part of the following: 7 x 1 = 7
(a) Briefly describe with neat sketch, working and application of explosive forming.
(b) Write short note on: 3-2-1 principle of location & jigs and fixtures.
5. Attempt any one part of the following: 7 x 1 = 7
(a) Define trimming, shaving, notching, lancing and nibbling operations.
(b) Derive an expression of radial stress in deep drawing of a cup.
6. Attempt any one part of the following: 7 x 1 = 7
(a) What is wire drawing operation? In a wire drawing operation initial wire
diameter is 6 mm and final wire diameter is 5 mm, the half die angle ? = 10
0
.
FirstRanker.com - FirstRanker's Choice
Printed Pages: 2 Sub Code: RME402
Paper Id: 140411 Roll No.
B.TECH
(SEM IV) THEORY EXAMINATION 2017-18
MANUFACTURING SCIENCE & TECHNOLOGY-I
Time: 3 Hours Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
1. Attempt all questions in brief. 2 x 7 = 14
a. What are the major classifications of manufacturing processes?
b. What is recrystallization temperature?
c. What is forging? What are the common forging processes?
d. What is the angle of bite for rolling and on what does it depend?
e. Distinguish between blanking and punching process.
f. Compare hot chamber and cold chamber die casting process.
g. What is the unconventional metal forming process? Enlist unconventional
metal forming processes.
SECTION B
2. Attempt any three of the following: 7 x 3 = 21
a. List and explain different defects in rolling process. Also list their causes and
remedies.
b. What is the use of power metallurgy process? Discuss the various steps
involved in power metallurgy process.
c. What is deep drawing? List and explain the different defects in deep drawing
operation.
d. How does compound die differ from progressive die? Explain the compound
die with suitable diagram.
e. What are the advantages of bottom gating system? Derive the expression for
the bottom gating system, time taken to fill the mould cavity.
SECTION C
3. Attempt any one part of the following: 7 x 1 = 7
(a) What is centrifugal casting? Explain about different types of centrifugal casting
methods.
(b) Enumerate some common casting defects. Explain their causes and remedies.
4. Attempt any one part of the following: 7 x 1 = 7
(a) Briefly describe with neat sketch, working and application of explosive forming.
(b) Write short note on: 3-2-1 principle of location & jigs and fixtures.
5. Attempt any one part of the following: 7 x 1 = 7
(a) Define trimming, shaving, notching, lancing and nibbling operations.
(b) Derive an expression of radial stress in deep drawing of a cup.
6. Attempt any one part of the following: 7 x 1 = 7
(a) What is wire drawing operation? In a wire drawing operation initial wire
diameter is 6 mm and final wire diameter is 5 mm, the half die angle ? = 10
0
.
Find the drawing stress considering friction if ? = 0.1 and K = 18 MPa. Also
calculate the maximum possible reduction.
(b) Briefly explain the principle and mechanism of rolling process. Calculate the
bite angle when rolling 15 mm thick plate using rolls of 400 mm diameter.
Final thickness of plate is 12 mm.
7. Attempt any one part of the following: 7 x 1 = 7
(a) Derive an expression for average pressure for forging of a disc with sticking
friction condition.
(b) A strip of lead with initial dimension 24 ? 24 ? 150 mm is forged between two
flat dies to a final size of 6 ? 96 ? 150 mm and if the coefficient of friction is
0.25, determines the forging force. The average yield stress of lead in tension is
7 N/mm
2
.
?
FirstRanker.com - FirstRanker's Choice
This post was last modified on 29 January 2020