RRB JE Mechanical- Welding Questionbank

Mechanical-Engineering

The length of the slot weld can be obtained from the ratio of ? RRB JE 29-08-2019

Allowable stress to load
Load to allowable stress
Allowable stress to weld area
Weld area to allowable stress

Explanation:

A slot weld joins the surface of a piece of material to another piece through an elongated hole. The hole can be open at one end and be partially or completely filled with weld material. The length of the slot weld can be obtained from the ratio of load to allowable stresses.

The distance from the joint root to the toe of the weld is called- ? RRB JE 29-08-2019

Face
Leg
Effective throat
Actual throat

Explanation:

The distance from the joint root to the toe of the weld is called leg (h). In fillet weld, t = 0.0707h where, t = throat and h = leg of weld.

The distance that fusion extends into the base metal or previous pass from the surface melted during welding is known as- ? RRB JE 29-08-2019

Deposition thickness
Dilution
Cold lap
Depth of fusion

Explanation:

The distance that fusion extends into the base metal or previous pass from the surface melted during welding is known as depth of fusion. Dilution = Area of penetration/Area of Reinforcement.

The force applied on a body of mass 236 kg to produce an acceleration of 4 m/s² is- ? RRB JE 30-08-2019

59 N
472 N
944 N
118 N

Explanation:

Given, Acceleration (a) = 4 m/s², Mass (m) = 236 kg. Force (F) = ma = 4 × 236 = 944 N.

What is the full form of DCEP in arc welding? ? RRB JE 30-08-2019

Direct Current Electrode Point
Direct Current Electric Point
Direct Current Electric Positive
Direct Current Electrode Positive

Explanation:

Direct Current Electrode Positive is the full form of DCEP in arc welding. DCSP – Direct Current Straight Polarity, DCRP – Direct Current Reverse Polarity. DCSP will be used so that heat concentration will be more on work piece side and depth of penetration is more. DCRP is used when the melting rate of the electrode is more as compared to melting of the work piece.

In overhead welding position, which is correct option ? RRB SSE Bilaspur Yellow paper, 21.12.2014

work places lie flat, welding is done from upper side of joint
welding is performed from the underside of joint
this position is most simple operation as compared to flat position
most suitable for Submerged Arc process

Explanation:

In overhead position, welding is carried from the underside of the joint. It’s the most complicated and difficult position to work in. The metal deposited to the joint tends to sag on the plate, resulting in a bead with a higher crown. To prevent this, keep the molten puddle small.

Plain and butt welds may be used on materials upto approximately: ? RRB Bhopal SSE 09.09.2012, ? RRB Secunderabad Technical (Eng.), 0.05.2007

25 mm thick
40 mm thick
50 mm thick
70 mm thick

Explanation:

Plain & butt welds are used to weld the materials upto the thickness 25 mm. Butt Joints – Metals pieces are joined head to head or side by side. Butt joints are more strong & durable joint, used in where a smooth weld face is required, suitable for both thick & thin section work pieces. For butt joint there is no required of edge preparation of thin work pieces (3 mm).

In a single V-butt welds, the angle between edges is kept about ? RRB Jammu SSE 09.09.2012, ? RRB Bhopal Section Engineer, 24.11.2002

40° to 60°
70° to 90°
10° to 20°
20° to 40°

Explanation:

The single V-butt welded joints are used when the thickness of the plates is between 8-16 mm. The angle of the bevel is about 70° to 90°.

Which of the following is true regarding T joint weld? ? RRB Chandigarh SSE 09.09.2012

It is used where several loading is encountered and the upper surface of both pieces must be in the same plane
It is used to join two pieces of metal in the manner as rivet joint means
It is used to join two pieces perpendicularly
It is used where longitudinal shear is present

Explanation:

T-Joint is used when two components are perpendicular to each other in the form of T. The end of one face is welded to other side of a component. T-joint is used where longitudinal shear is present.

What should be the size of weld in case of butt welded joint? ? RRB Allahabad JE 09.09.2012

Twice the throat of weld
Half of the throat of weld
Equal to the throat of weld
None of the above

Explanation:

Size of weld in butt welded joint equal to the throat of weld.

A backing ring is used inside the pipe joint when making a ? RRB Bhubneshwar JE II 29.11.2008

butt weld
fillet weld
sleeve weld
socket weld

Explanation:

A backing ring is used inside the pipe joint when making a butt weld. Types of pipe joint: Socket or coupler joint – Used for pipe carrying water at low pressure; Nipple joint – This joint reduces the area of flow; Union joint – Provides the facility of disengaging the pipe by simply unscrewing a coupler nut.

The phenomenon of weld decay occurs in ? RRB JE 29-08-2019

Brass
Aluminium
Bronze
Stainless steel

Explanation:

The phenomenon of weld decay occurs in stainless steel. Weld decay is a form of intergranular corrosion, usually of stainless steels or certain nickel-base alloy, that occurs as the result of sensitization in the heat-affected zone (HAZ) during the welding operation.

Thermit is a mixture of fine Aluminium powder and iron oxide in the ratio of about by weight. ? RRB JE 29-08-2019

1:2
1:3
3:1
2:1

Explanation:

Thermit is a mixture of fine aluminium powder and iron oxide in the ratio of about 1:3 by weight. This mixture is placed in a crucible and ignited by means of a fire cracker. In this welding, temperature generated near about 3000°C. It is used for repair of railway track. 8Al + 3Fe₃O₄ → 4Al₂O₃ + 9Fe + Heat.

Electron beam welding works best when the entire operation and the work-piece are in a high vacuum of _____ torr or lower. ? RRB JE 30-08-2019

1/1000
1/100
1/10000
1/10

Explanation:

Electron beam welding is a fusion welding process whereby electrons are generated by an electron gun and accelerated to high speed using electrical field. The beam of electrons creates kinetic heat as it impacts with the work-pieces, causing them to melt and bond together. This welding works best when the entire operation and the work-piece are in a high vacuum of 1/10000 torr or lower.

Bare electrodes are used in which of the following welding processes? ? RRB JE 30-08-2019

Thermit welding
Atomic hydrogen welding
Percussion welding
Submerged arc welding

Explanation:

In submerged arc welding, the arc is produced between a bare metal electrode and the work piece. The submerged arc welding is mostly done on low carbon and alloy steels but it may be used on many of the non-ferrous metals.

Match the following ? RRB Mumbai C&G JE 25.10.2009

4,3,2,1
4,1,3,2
2,3,1,4
3,4,1,2

Explanation:

A. Thermit welding – 3. Exothermic chemical reaction; B. Projection welding – 4. Ohmic resistance; C. MIG welding – 1. Electric arc; D. Friction welding – 2. Mechanical work. MIG – Metal Inert Gas.

Match the following

1,2,4,3
5,1,4,2
3,1,5,2
4,3,1,2

Explanation:

A. Welding of aluminium alloy – 5. TIG welding; B. Ship building – 1. Submerged arc welding; C. Joining of HSS drill bit to shank – 4. Gas welding; D. Deep penetration precision welds – 2. Electron beam welding. TIG – Tungsten Inert Gas. HSS – High Speed Steel.

Consider the following welding processes: 1. TIG welding 2. Submerged arc welding 3. Electro-slag welding 4. Thermit welding. Which of these welding processes are used for welding thick pieces of metals? ? RRB Mumbai C&G SE 25.10.2009

1,2 and 3
1,2 and 4
1,3 and 4
2,3 and 4

Explanation:

Submerged arc welding, electro-slag welding and Thermit welding always use for welding thick workpiece. TIG welding – Tungsten Inert gas welding uses non-consumable tungsten electrode, used for less thickness material most favourable for aluminium workpiece. Submerged arc welding – arc will be submerged inside the molten weld pool any length of welding with high thickness of material can be done by using in a single run. Electro-slag welding – used for welding of thick plate upto 450mm thickness in single pass. Thermit welding – used for repair of railway track, broken tooth gear etc.

Out of the following, which is NOT a type of welding? ? RRB SSE Secunderabad Green paper, 21.12.2014

AC Arc
DC Arc
MIG
All of these are different types of weldings

Explanation:

AC Arc, DC Arc and MIG are different type of welding process.

The correct sequence of these processes in increasing order of their welding temperature is ? RRB Bhopal TM SSE 25.10.2009

1,3,4,2
1,2,3,4
4,3,1,2
4,1,3,2

Explanation:

Simple Gas welding – 930-1275°C; Thermit welding – 2400°C; Arc welding – 5500°C; Resistance welding – 30000°C.

Which of the following is/are resistance welding? ? RRB Bangalore SSE 09.09.2012

Seam welding
Projection welding
Spot welding
All of these

Explanation:

Seam welding, Projection welding and Spot welding are all types of resistance welding.

In Arc Welding process, welding cables are used for ? RRB JE (Re-Exam) 04.06.2025

cleaning the surface to be welded
conduction of current from the welding machine to the electrode holder
connecting to the hand held electrode directly and conducting current to it
frequently igniting the welding torch

Explanation:

In arc welding, welding cables are used for conduction of current from the welding machine to the electrode holder which then transfers the current to the electrode for creating the arc. In arc welding arc specifically designed to carry the high electric current required from the welding power source to electrode holder and workpiece, forming the welding circuit.

In gas welding process, gas pressure regulators are employed for ? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

increasing the oxygen and acetylene mixture pressure
mixing oxygen and acetylene thoroughly
reducing the pressure of acetylene and oxygen gas from the cylinders to working pressure
igniting the welding torch

Explanation:

In gas welding gas pressure regulators are employed to control and reduce the gas pressure that is usable working pressure suitable for welding operations. These regulators provide a steady and constant flow of gas.

What is the function of shielding gas in Gas Tungsten Arc Welding (GTAW)? ? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

Protects the tungsten electrode and the molten metal weld pool from the atmospheric contamination
Protects the consumable coated electrode and the molten metal weld pool from the atmospheric contamination
Removes the slag by striking and conducts current to pass through it
Protects the consumable bare electrode and the molten metal weld pool from the atmospheric contamination

Explanation:

The function of shielding gas in Gas Tungsten Arc Welding (GTAW) is to protects the tungsten electrode and the molten metal weld pool from the atmospheric contamination by creating a barrier around the weld area, preventing harmful gases like oxygen and nitrogen from interacting with the molten metal and compromising the weld quality.

In reverse polarity welding, electrode holder is ? RRB JE 29-08-2019

Earthed and work is positive
Earthed and work is negative
Connected to the negative and work to positive
Connected to the positive and work to negative

Explanation:

In reverse polarity welding, electrode holder is connected to positive and work to negative. Reverse polarity is used for Welding of non-ferrous metals, Welding of cast iron, Welding with heavy and super-heavy coated electrodes, Welding horizontal, vertical and overhead positions. At positive terminal 66.6% and at negative terminal 33.4% heat is released.

The heat generated (H) in resistance welding is expressed by ? RRB JE 29-08-2019

IR²
IRt
I²Rt
IR²t

Explanation:

In resistance welding, both heat and pressure are used. Heat is generated by the electrical resistance of the work pieces and the interface between them. Due to resistance, generated heat (H) = I²Rt. In this welding, very high current (up to 100000A) and very low voltage (0.5 to 10V) are used. No filler metal, no flux, no shielding gases are used.

An ammeter requires a change of 3A in its coil to produce a change in deflection of the pointer by 12 mm. Its sensitivity is- ? RRB JE 29-08-2019

4 mm/A
36 mm/A
15 mm/A
9 mm/A

Explanation:

Given, Change in deflection = 12 mm, Change in current = 3A. Sensitivity = Deflection/Current = 12/3 = 4 mm/A.

What is the unit of electric potential? ? RRB JE 31-08-2019

Volt (V)
Coulomb (C)
Joule (J)
Ampere (A)

Explanation:

Electric potential energy is a scalar quantity and is defined as the total potential energy a unit charge will possess if located at any point in outer space. The general formula of electric potential is: Electric potential (V) = Energy/charge. The S.I. unit of electric potential is volt.

In arc welding, welding set provides: ? RRB Chandigarh SSE 09.09.2012, ? RRB Bhopal & Mumbai Apprentice Section Engg. 23.03.2003

A.C. supply
D.C. supply
A.C. & D.C. supply
Store welding tools

Explanation:

Welding set – Electric arc welding require the right amount of current and voltage to create the desired arc. The machine used for this purpose is called welding set. In welding process both types of current A.C. and D.C. are used.

In D.C. welding, the straight polarity (electrode negative) results in: DMRC JE 22.09.2017, ? RRB Gorakhpur Design SSE 09.09.2012

Lower penetration
Lower deposition rate
Less heating of work piece
Smaller weld pool

Explanation:

In D.C. welding the straight polarity (electrode negative) result in lower deposition rate and high depth of penetration because in case of straight polarity 1/3 heat generated at electrode and 2/3 at work piece. In straight polarity electrode is set as negative (cathode) and workpiece is set as positive which known as anode.

During arc welding, eyes need to be protected against: ? RRB JE [Exam Date- 27.08.2015 (Shift-III)], ? RRB JE [Exam Date- 14-12-2014 (02 Red Paper)]

Intense glare
Microwaves
High-frequency waves
X-rays and gamma rays

Explanation:

During arc welding, eyes need to be protected against Intense glare, Microwaves, High-frequency waves, X-rays and gamma rays. Helmet and Hand Shield provide protection to the eye and skin of the welder from these harmful rays and provide a clear view of the welding surface and welding process.

D.C. generator set is used in ? RRB Allahabad JE 09.09.2012

Submerged arc welding
TIG welding
Both the above
None of the above

Explanation:

D.C. generator set is used in both submerged arc welding and TIG welding. D.C. Generator Set – They are used more in submerged arc welding and TIG welding. In arc welding, twice as much heat is generated at the positive pole as compared to the negative pole.

Which welding set used for stable arc ? RRB Bhubneshwar JE II 29.11.2008

D.C. generator set
Motor Generator Set
A.C. generator set
None of the above

Explanation:

Arc stability is better with DC welding because in DC welding magnitude and direction of current are constant so stabilizing it is easy. In the case of AC magnitude and direction both are changing continuously so making it stable are difficult.

A.C./D.C. rectifier set provides ? RRB Jammu SSE 09.09.2012

A.C. current
D.C. current
A.C. & D.C. current
Store welding tools

Explanation:

A.C./D.C rectifier set provides AC & DC current. This type of set A.C. and D.C. both type of current can be supplied. The qualities of both are embedded in this like transformer. In this also first A.C. current itself is made according to the requirement, which is then converted into DC by rectifying into current.

In electrode holder, holding jaw made of ? RRB Gorakhpur Design SSE 09.09.2012

Copper alloy
Stainless steel
Cast iron
None of the above

Explanation:

In electrode holder, holding jaw made of copper alloy. Pillar like device used to hold the electrode and connect it with the cable to the welding set. There is an insulated handle to hold and guide the electrode inside, which the cable is connected by a voltage. This jaw for holding the electrode are made of copper alloy with grooves made for holding the electrode at different angle of the holder depending on electrode it used.

Which colour used for painting welding booth wall ? RRB Bangalore SSE 09.09.2012

Black
White
Yellow
Green

Explanation:

Black colour used for painting welding booth wall. The work of welding is dangerous and produce harmful light. Welder become safe by wearing helmet, hand shield and apron etc. Therefore for welding work a separate room is constructed as per requirement which is called welding booth. Its wall are black colour so that there is no reflection of light.

Following equipment is used for arc welding a material by carbon electrode DMRC JE 22.09.2017

a.c. welding set
rectifier
motor generator
d.c. welding set with straight polarity

Explanation:

DC welding set with straight polarity is used for arc welding a material by carbon electrode. For a welding material by carbon electrode with direct current straight polarity DC welding set equipment (DC welding set with straight polarity) is used.

Coated electrodes are used in ? RRB Bhubneshwar JE-II 19.12.2010

tungsten inert gas welding
gas tungsten arc welding
submerged arc welding
shielded metal arc welding

Explanation:

A consumable electrode, used in welding, can be either bare or coated. The coated electrode also called stick electrode, is used for manual arc welding process such as shielded metal arc welding. In arc welding, the material of the rod in the coated electrode has a lower melting point than the coated metal. Hence it melts quickly to form the joint, then the coated metal melts to protect the joint from the external environment.

Which welding set have higher initial cost ? RRB Mumbai SSE 19.12.2010

D.C. generator set
Motor Generator Set
A.C. generator set
A.C. transformer

Explanation:

The initial cost of a D.C. generator set is maximum. The cost of A.C. transformer is less. The efficiency of D.C. generator set is 60%. It is used for both ferrous and nonferrous metal and provide a stable arc.

Electrode holder used for ? RRB Mumbai JE 05.10.2008

Holding electrode vertically
Holding electrode horizontally
Holding electrode in any position
As earth clamp

Explanation:

The electrode holder is also called stinger. It is a holding device which is used to hold the electrode precisely in any position. There is an insulated handle to hold and guide the electrode, inside which the cable is connected by source of power. The jaws for holding the electrode are made of copper alloy with grooves made for holding the electrode at different angle. The holder is selected on the basis of the current to be used.

Welding goggles used during Konkan Railway SSE 2015

Welding joint chipping
Gas welding
Both (a) and (b)
None of these

Explanation:

Welding Goggles is a dark black glass which cover the eyes completely (even from the side) are used for welding work. In arc welding, a layer of flux build up on the weld bead, which is broken off with a chipping hammer. At that time spectacles should be worn so that the flux does not splash and fall into the eye. Welding should be done by wearing spectacles even at the time of gas welding.

Selection of welding cable is depend on Konkan Railway STA 2017

Size of electrode
Welding machine
Both (a) and (b)
None of these

Explanation:

When current flow through a wire, heat generated in it due to the resistance of that wire. Cable is selected based on the thickness of the electrode to be used and the distance from the machine to the workpiece. Thicker electrode require more current.

Weld gauge used for measuring ? RRB Gorakhpur RDSO SSE 25.10.2009

Convexivity
Concavity
Both (a) and (b)
None of these

Explanation:

Weld gauge used for measuring convexivity and concavity. In welding the filler metal gives a concave or convex bead depending upon the metal to be welded. To check the quality of the bead, it is necessary to make certain criteria weld gauge measure the concavity or convexity of weld bead to tell what quality the bead is. In this different size and gauge of the rest are threaded in a bunch.

Which of the following disadvantage of AC welding set? ? RRB Allahabad JE 25.10.2009

Ferrous metal can be weld easily
Ferrous metal cannot be weld easily
Both ferrous and non ferrous weld easily
None of these

Explanation:

AC welding set like A.C. Transformer cable are used for ferrous metal only. The arc does not remain constant in these, but due to the changing polarity, the temperature remains the same on both the poles. It is weightless and occupies less space.

Welding gloves are generally made of ? RRB Bhopal TM SSE 25.10.2009

PVC
Leather
Chrome leather
None of these

Explanation:

In arc welding, there is a danger of burning hands or other clothes due to spattering of molten metal on the welding surface or due to other reason. Gloves are used to protect hand while aprons and leg guards are used to protect cloth. These items are made of chrome leather.

Which of the following control welding current and voltage ? RRB Kolkata SSE 09.09.2012

Welding set
Earth clamp
Welding cable
All of the above

Explanation:

Electric arc welding machine which control the current and voltage to produce the desired arc. It is called welding set. Mainly three types of welding set are used: 1. DC generator, 2. AC/DC rectifier set, 3. AC Transformer set.

The function of fluxes in soldering is ? RRB JE (Re-Exam) 04.06.2025

to heat metal over a range of temperature up to fusion and then allow to cool
to remove oxides and other surface compounds from the surfaces to be soldered
to use consumable bare electrode in combination with a flux feeder tube
to remove dirt particles and other surface compounds from the surfaces to be soldered

Explanation:

The function of fluxes in soldering is to remove oxide and other surface compounds from the surfaces to be soldered. By definition, soldering is a brazing type of operation where the filler metal has a melting temperature below 450°C. Most solders are alloys of lead and tin. In this, strength of the filler metal is low. Soldering is used for a leak-proof joint or a low resistance electrical joint.

E6010 is a _____ tensile strength electrode. ? RRB JE 29-08-2019

60,000 psi
7,000 psi
10,000 psi
61,000 psi

Explanation:

E6010 in arc welding – 60 10 Electrode position Tensile strength and current. E6010 is a 60,000 psi tensile strength electrode.

Which of the following gases is NOT used as shielding gas in arc welding? ? RRB JE 29-08-2019

Carbon monoxide
Carbon dioxide
Helium
Argon

Explanation:

Carbon monoxide (CO) is a reactive gas, so it is not used as shielding gas in arc welding. Helium (He) and Argon (Ar) gases are used as shielding gas in MIG and TIG arc welding. Carbon dioxide (CO₂) gas is used as shielding gas in MIG Arc welding.

The type of covering in an electrode indicated by the letter RR is ? RRB JE 30-08-2019

Rutile and heavy coated
Cellulosic
Rutile
Basic

Explanation:

The type of covering in an electrode indicated by the letter RR is Rutile and heavy coated. Letters to denote type of covering of electrode: A → Acidic covering, B → Basic covering, C → Cellulosic covering, R → Rutile covering, RR → Rutile covering heavy coated.

The coating factor for a heavy coated electrode is ? RRB JE 30-08-2019

1.6
3
1.24
1.44

Explanation:

Coating factor (CF) = Diameter of coating / Diameter of core wire. For heavy coated electrode, CF = 1.6 to 2.2; For medium coated electrode, CF = 1.4 to 1.7; For light coated electrode, CF = 1.2 to 1.35.

Which of the following is an organic flux? ? RRB JE 31-08-2019

Zinc chloride
Phosphoric acid
Tallow
Hydrochloric acid

Explanation:

Tallow is an organic flux. It is used mainly for the soldering of coins.

Match List-I (Ingredients) with List-II (Welding functions)

3,4,2
2,1,3
3,1,2
2,4,3

Explanation:

A. Silica – 3. Fluxing agent; B. Potassium silicate – 1. Arc stabilizer; C. Ferro silicon – 2. Deoxidizer; D. Cellulose – 4. Gas forming material.

The material used for coating the electrode is called:

Protective layer
Slag
Flux
Shield

Explanation:

The material used for coating the electrode is called flux. The electrode is coated with a metal mixture called flux, which gives off gases as it decomposes to prevent weld contamination, introduces deoxidizers to purify the weld, form weld protecting slag to improve the arc stability and provides alloying elements to improve the weld quality.

Two sheets of same material but different thickness can be butt welded by ? RRB Allahabad JE 09.09.2012

adjustment of the current
time duration of current
pressure applied
changing the size of one electrode

Explanation:

Two sheets of same material but different thickness can be butt welded by changing the size of one electrode. If thickness of material is different then thick electrode is used for thick material because to weld the thick material more heat is used and in this process electrode is joined with positive terminal & workpieces in negative terminal more heat generated in the electrode due to high resistance & current. Hence for thick material size of electrode changed.

What is the use of flux in welding process ? RRB Bhubneshwar JE II 29.11.2008, ? RRB JE Exam Date 04.01.2015 (Yellow Paper)

Remove oxide of metal formed at high temperature
Permit perfect cohesion of metals
Both the above
None of the above

Explanation:

Main use of flux in welding: (1) Remove oxide of metal formed at high temperature, (2) Permit perfect cohesion of metals. The material used for electrode coating is called flux which helps in making the arc and keeping stable. The flux melts by the heat of the arc to give a shielding gas that protects the molten metal from atmosphere oxygen and Nitrogen gases. Borax is widely used in the form of flux.

The main criterion for selection of electrode diameter in arc welding is JMRC JE 10.06.2017

Material to be welded
Thickness of material
Voltage used
Current used

Explanation:

The main criterion for selection of electrode diameter in arc welding is thickness of material. The arc welding is a fusion welding process in which the welding heat is obtained from an electric arc struck between the work or base metal and an electrode.

Which welding process is NOT classified under arc welding processes? ? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

Stud Arc Welding
Electroslag Welding
Atomic Hydrogen Welding
Tungsten Inert Gas Welding

Explanation:

In arc welding the arc is struck between a flux covered stick electrode and the work-piece. Arc welding are classified into two categories: 1. Consumable electrode method – Shielding Metal Arc Welding (SMAW), Gas Metal Arc Welding (GMAW) (MIG welding), Flux-Cored Arc Welding (FCAW), Submerged Arc Welding (SAW); 2. Non-consumable electrode method – Gas Tungsten Arc Welding (GTAW) (TIG), Plasma Arc Welding (PAW), Atomic Hydrogen Welding (AHW), Carbon Arc Welding.

In Arc Welding process, chipping hammer is used to ? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

clean the surface to be welded
protect the eyes
remove the slag by striking
hold the electrode manually and conducting current to it

Explanation:

In the arc welding process, a chipping hammer is used to remove slag from by striking. Slag is a hardened layer of flux residue that forms on the weld after welding.

In Arc Welding Processes, GMAW stands for ? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

Gas Molten Arc Welding
Gas Molten Arbour Welding
Gas Metal Arc Welding
Gas Metal Arc Welding

Explanation:

In Arc Welding Processes, GMAW stands for gas metal arc welding. It also known as metal inert gas (MIG) welding. In gas metal arc welding consumable wire electrode is used.

In Carbon Arc Welding, DCSP stands for ? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

Direct current straight polarity
Dual current straight polarity
Direct current straight porosity
Direct current straight pressure

Explanation:

In the carbon arc welding (CAW) process, pure graphite electrode is used to create an electric arc. DCSP involves connecting the carbon electrode to the negative terminal and the workpiece to the positive terminal, resulting in deeper penetration, stable arc and extended electrode life. Approximately two-third of arc heat is concentrated at the workpiece and one-third at the electrode. Applications: structural welding, repair work.

In Submerged Arc Welding, _____ electrode is used in combination with a flux feeder tube. ? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

non-consumable graphite
non-consumable tungsten
consumable bare
non-consumable baked carbon

Explanation:

In Submerged Arc Welding, consumable bare electrode is used in combination with a flux feeder tube. It is a highly efficient welding process that involves the formation of an arc between a continuously fed consumable electrode and the workpiece.

What does the process of Principle of Arc welding involve? ? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

Supplying oxygen and acetylene between the electrodes to melt the metal
Creating friction between the electrode and the workpiece to melt the metal
Creating flow of electric current in the air gap between the electrode and the workpiece to melt the metal
Creating a chemical reaction between the electrode and the workpiece to melt the metal

Explanation:

Working principle of arc welding: In arc welding an electric current is passed through an electrode creating an arc between the electrode and the workpiece by maintaining the gap between them. The intense heat from the arc melts the metal at the joint, creating a strong weld upon cooling.

Shielded Metal Arc Welding (SMAW) is also called ? RRB JE Stage 2 (22.04.2025 9:00 AM-11:00 AM)

Manual Metal Arc Welding
Gas Tungsten Arc Welding
Tungsten Inert Gas Welding
Metal Inert Gas Welding

Explanation:

Shielded Metal Arc Welding (SMAW) is also called Manual Metal Arc Welding.

_____ type of electrode is used in Gas Tungsten Arc Welding (GTAW). ? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

Consumable coated
Consumable bare
Non-consumable tungsten
Non-consumable carbon

Explanation:

Gas Tungsten Arc Welding (GTAW), also known as Tungsten Inert Gas (TIG) welding is a welding process in which an arc is formed between a non-consumable tungsten electrode and the metal being welded. The weld area and the electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas (Argon or Helium). Applications: GTAW commonly used for thin sections of stainless steel and non-ferrous such as Al, Mg, Cu alloys.

Tungsten Inert Gas Welding (TIG) is also called ? RRB JE Stage 2 (22.04.2025 2:30-4:30 PM)

Metal Inert Gas Welding
Gas Metal Arc Welding
Thermo-compression Welding
Gas Tungsten Arc Welding

Explanation:

Tungsten inert gas (TIG) welding is also known as gas tungsten arc welding (GTAW) is a welding process that utilizes a non-consumable tungsten electrode to produce the weld. The weld area and electrode are protected from atmospheric contamination by an inert shielding gas, typically Argon or Helium.

Backhand technique is the oxy-acetylene welding process is also known as ? RRB JE 30-08-2019

Leftward technique
Forward technique
Rightward technique
Middle hand technique

Explanation:

Backhand technique is the oxy-acetylene welding process is also known as rightward technique. In this method, the welding torch is held in the right hand and the filler rod in the left hand. Leftward welding begins at the left hand end of the joint and proceeds towards the right. The torch makes an angle of 40°-50° with the plate and the welding rod makes an angle of 30°-40°.

The maximum heat in resistance welding is at the ? RRB JE 31-08-2019

Top surface of the plate at the time of electric contact with the electrode
Interface between the two plates being joined
Tip of the positive electrode
Tip of the negative electrode

Explanation:

Resistance or electric resistance welding is a type of pressure welding used for joining pieces of sheet metal or wire. The heat is obtained at the location of the desired weld by the electric resistance through the metal pieces to a relatively short duration, low voltage (from 6 to 10 volts), high amperage (from 60 to 4000 Amp.) electric current. The maximum heat in this welding is at the interface between the two plates being joined.

Which of the following processes uses non-consumable electrode? ? RRB JE 31-08-2019

TIG welding
MIG welding
Laser welding
Electroslag welding

Explanation:

TIG welding uses non-consumable electrode. In TIG welding the electrode contains 1-2% (thorium oxide) mixed with pure tungsten because pure tungsten carry less current. Both DC and AC power sources can be used. With DCEN (Direct current electrode negative), more heat is generated near the work piece and consequently the electrode does not get heated to a great extent.

The complete resistance spot weld cycle has been divided into _____ parts. ? RRB JE 31-08-2019

Three
Four
Two
Five

Explanation:

The complete resistance spot weld cycle has been divided into four parts.