Metal Joining - Manufacturing Processes - Metallurgical Engineering Previous Year Questions

1

2008 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2008

The order of decreasing weldability among the following steels is
(P) Fe-0.6%C
(Q) Fe-0.4%C
(R) HSLA

A

R→Q→P

B

P→Q→R

C

Q→P→R

D

Q→R→P

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2

2009 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2009

Flux in welding process acts as

A

catalyst

B

protective agent

C

filler

D

heat generator

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3

2009 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2009

Match the joining processes in Group 1 with the filler materials in Group 2.

Group 1	Group 2
P. Soldering	1. Silver – Titanium alloy
Q. Welding	2. Silver – Tin alloy
R. Brazing	3. Mild steel
	4. Lead fluoride

A

P-2, Q-3, R-1

B

P-1, Q-2, R-3

C

P-3, Q-1, R-2

D

P-2, Q-4, R-1

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4

2009 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2009

The resistance offered by the spot is

A

6 × 10⁻⁸ Ω

B

6 × 10⁻⁵ Ω

C

6 × 10⁻⁵ Ω

D

6 × 10⁻⁸ Ω

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5

2009 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2009

The time required to perform the weld is

A

0.6 s

B

6 s

C

60 s

D

600 s

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6

2010 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2010

Which of the following is NOT a solid state welding process?

A

Friction stir welding

B

Ultrasonic welding

C

Explosive welding

D

Flux cored arc welding

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7

2011 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2011

In a brazing process the liquid metal fills the gap by which one of the following means?

A

Capillary infiltration

B

Gravity infiltration

C

Pressure infiltration

D

Vacuum infiltration

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8

2011 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2011

The nature of submerged arc welding flux with basicity index of 0.5 is

A

neutral

B

basic

C

semi-basic

D

acidic

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9

2011 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2011

Which one of the following carbon equivalent in steel is considered good for weldability?

A

1.0

B

0.8

C

0.6

D

0.4

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10

2012 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2012

Which of the following is NOT a fusion welding process?

A

Arc welding

B

Gas welding

C

Resistance welding

D

Friction stir welding

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11

2013 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2013

For a good quality brazing, the molten filler alloy should have

A

low contact angle with the base metal

B

low density

C

high surface tension

D

high viscosity

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12

2013 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2013

Arc welding is done using current, voltage and welding speed of 200 A, 20 V and 0.01 m/s, respectively. The heat input in kJ per unit length is __________

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13

2014 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2014

Which one of the following welding processes uses a non-consumable electrode?

A

Gas tungsten arc welding

B

Gas metal arc welding

C

Submerged arc welding

D

Flux cored arc welding

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14

2014 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2014

Determine the correctness or otherwise of the following Assertion (a) and Reason (r).
Assertion (a): During welding of aluminium alloys by the gas tungsten arc welding process, direct current reverse polarity (DCRP) mode is used.
Reason (r): DCRP facilitates breaking up of the oxide film on the workpiece surface.

A

a is true but r is false

B

a is false but r is true

C

both a and r are true, and r is the reason for a

D

both a and r are true, but r is not the reason for a

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15

2016 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2016

Of the following welding processes
[P] Laser Beam Welding
[Q] Submerged Arc Welding
[R] Metal Inert Gas Welding
the width of the heat-affected zone in decreasing order is

A

P > Q > R

B

Q > R > P

C

R > P > Q

D

P > R > Q

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16

2018 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2018

Which of the following welding processes is NOT suitable for joining thin metal sheets?

A

Gas Metal Arc Welding

B

Electro Slag Welding

C

Electron Beam Welding

D

Laser Beam Welding

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17

2018 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2018

Which of the following categories of materials is suitable as a filler for brazing of steel sheets?

A

Epoxy resins

B

Near-eutectic alloys

C

Refractory alloys

D

Large freezing range alloys

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18

2018 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2018

The temperature profile (T in Kelvin) of an arc weld across its width is given as \(T = 2000 \exp(-0.3x^2)\) where \(x\) (in mm) is the distance from the weld centre. The melting point of the base material is 1500 K. The width of the fusion zone is ______ (in mm to two decimal places).

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19

2019 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2019

Two blocks of the same metal are to be welded. The configuration that will undergo the least distortion after welding is ____________.

A

Configuration A

B

Configuration B

C

Configuration C

D

Configuration D

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20

2019 · Metallurgical Engineering · Manufacturing Processes · Metal Joining

Metallurgical Engineering (MT) 2019

An arc welding is performed at 400 Amperes, 20 V at a traverse speed of 5 mm.s^-1. If the heat transfer efficiency is 0.6, the energy input per unit length (in J.mm^-1, rounded off to the nearest integer) during the process is ____________.

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