G.C.R.G. MEMORIAL TRUST’S GROUP OF INSTITUTIONS FACULTY OF ENGINEERING SESSION: 2014-15/ SEM /2 nd Sessional Sub: AWT [Time: 02:00 Hours Paper code:EME-022 [M.M.:50 Branch: Mechanical Engg. Q1: Answer any two parts of the following: (5×2=10) (a) Explain the following weld defects: (i)Incomplete penetration (ii)Inclusion (iii)Porosity and blow holes (iv)spatter (b) List various destructive and non- destructive methods of testing welded joints. Explain the working of Dye penetrate testing method. (c) Relate relevant portion of Iron- Carbon Diagram and “HAZ” Q2: Write any two of the following: (5×2=10) (a) What is Schaeffler diagram? How it can be used for the selection of electrode? (b) Explain the principle of electron beam welding with a neat diagram. What is the mechanism of high electron penetration ? What do you understand by work accelerated and self accelerated electron gun. (c) Explain with the help of a diagram laser beam welding .What is the principle of a laser generation? Q3: Answer any two of the following: (5×2=10) (a) Describe with sketches, the mechanism of explosive welding. Also briefly write about weld interface and welding parameters. What is the application of explosive welding? (b) What is Schaeffer diagram? How it can be used for the selection of electrode. Q4: Answer any two of the following: (5×2=10) (a) What do you understand under water welding .explain with neat sketch.? Compare dc welding with ac welding. (b) What do you understand by friction welding? Where is it suitable? Discuss its principle. What are the differences amongst the autogenous , homogenous and heterogenous joining process? Give example of each process. (c) What do you understand by resistance welding ? What is the spot welding and how does it differ from projection welding ?What must be done to joint different of the same metals by spot welding ? What must be done to joint the same thickness of different metals? Q5: Write short note on any four of the following :
G.C.R.G. MEMORIAL TRUSTS GROUP OF INSTITUTIONSFACULTY OF
ENGINEERINGSESSION: 2014-15/ SEM /2nd SessionalSub: AWT [Time:
02:00 Hours Paper code:EME-022 [M.M.:50Branch: Mechanical Engg.
Q1: Answer any two parts of the following: (52=10)(a) Explain
the following weld defects:(i)Incomplete penetration
(ii)Inclusion(iii)Porosity and blow holes(iv)spatter(b) List
various destructive and non-destructive methods of testing welded
joints. Explain the working of Dye penetrate testing method.(c)
Relate relevant portion of Iron-Carbon Diagram and HAZQ2: Write any
two of the following: (52=10)(a) What is Schaeffler diagram? How it
can be used for the selection of electrode?(b) Explain the
principle of electron beam welding with a neat diagram. What is the
mechanism of high electron penetration ? What do you understand by
work accelerated and self accelerated electron gun.(c) Explain with
the help of a diagram laser beam welding .What is the principle of
a laser generation?Q3: Answer any two of the following: (52=10)(a)
Describe with sketches, the mechanism of explosive welding. Also
briefly write about weld interface and welding parameters. What is
the application of explosive welding?(b) What is Schaeffer diagram?
How it can be used for the selection of electrode.Q4: Answer any
two of the following: (52=10)(a) What do you understand under water
welding .explain with neat sketch.? Compare dc welding with ac
welding. (b) What do you understand by friction welding? Where is
it suitable? Discuss its principle. What are the differences
amongst the autogenous , homogenous and heterogenous joining
process? Give example of each process.(c) What do you understand by
resistance welding ? What is the spot welding and how does it
differ from projection welding ?What must be done to joint
different of the same metals by spot welding ? What must be done to
joint the same thickness of different metals?Q5: Write short note
on any four of the following :(a) Spray welding (2.54=10)(b)
Underwater welding(c) Life prediction of welded structures.(d) Arc
blow in welding(e) Electro slag welding(f) Welding defects
