Thermit welding is categorised aThermit welding is categorised as the __________ welding. (A) Forge (B) Fusion (C) Resistance (D) Arc s the __________ welding. (A) Forge (B) Fusion (C) Resistance (D) Arc

Thermit welding is categorised as the __________ welding. (A) Forge
(B) Fusion
(C) Resistance
(D) Arc
by

1 Answer

Answer :

(B) Fusion
by

Related questions

Projection welding & stud welding is categorised as the __________ welding. (A) Pressure (B) Thermit (C) Resistance (D) Arc

Description : Projection welding & stud welding is categorised as the __________ welding. (A) Pressure (B) Thermit (C) Resistance (D) Arc

Last Answer : C) Resistance

Rails in the field are generally welded by using a) Thermit welding b) Gas welding c) Electric arc welding d) Forge welding

Description : Rails in the field are generally welded by using a) Thermit welding b) Gas welding c) Electric arc welding d) Forge welding

Last Answer : a) Thermit welding

Consumable electrodes are used in the __________ welding. (A) Gas (B) Arc (C) Thermit (D) Resistance

Description : Consumable electrodes are used in the __________ welding. (A) Gas (B) Arc (C) Thermit (D) Resistance

Last Answer : (B) Arc

The electric arc welding is a type of ............. welding. (a) forge (b) fusion

Description : The electric arc welding is a type of ............. welding. (a) forge (b) fusion

Last Answer : b) fusion

Which type of welding is generally used in automobile sector? a) Electric arc welding b) Electric resistance welding c) Gas welding d) Forge welding

Description : Which type of welding is generally used in automobile sector? a) Electric arc welding b) Electric resistance welding c) Gas welding d) Forge welding

Last Answer : b) Electric resistance welding

Chromium molybdenum steel cannot be welded using __________ welding. (A) Thermit (B) Electrical resistance (C) Oxy-acetylene (D) Any of these

Description : Chromium molybdenum steel cannot be welded using __________ welding. (A) Thermit (B) Electrical resistance (C) Oxy-acetylene (D) Any of these

Last Answer : Option B

Thermit welding uses the following energy source. (A) Electrical energy (B) Chemical energy (C) Energy of high velocity electrons (D) Heat generated by friction

Description : Thermit welding uses the following energy source. (A) Electrical energy (B) Chemical energy (C) Energy of high velocity electrons (D) Heat generated by friction

Last Answer : (B) Chemical energy

Forge welding involves heating of parts to elastic stage and joint is prepared by impact force. a) Yes b) No, it is done up to plastic stage c) Heating is done up to boiling point d) None of the listed

Description : Forge welding involves heating of parts to elastic stage and joint is prepared by impact force. a) Yes b) No, it is done up to plastic stage c) Heating is done up to boiling point d) None of the listed

Last Answer : b) No, it is done up to plastic stage

Compare resistance welding and arc welding.

Description : Compare resistance welding and arc welding. 

Last Answer : Sr. No Resistance Welding Arc Welding 1 It is plastic welding It is fusion welding. 2 Arc is produced by heat due to resistance of flow of current by work and by application ... 8 Less skilled operator can do the job. More skilled operator is required to the job

Compare between Resistance welding and Arc welding on any six points.

Description : Compare between Resistance welding and Arc welding on any six points.

Last Answer : Sr.No Parameters Resistance Welding Arc Welding 1 Type of welding Plastic/Pressure/Non-fusion welding Fusion/Non pressure welding 2 Principle of heat developed Heat ... It is suitable for mass production It is suitable for heavy job, maintenance and repair work

Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :

Description : Identify the correct combination of respective Electric arc welding and Electric resistance welding methods :  (A) Butt welding and Seam welding  (B) Hydrogen shielding and Projection welding  (C) Seam welding and Coated electrode welding  (D) Coated electrode welding and Hydrogen shielding

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Which of the following mainly decides the current to be employed is arc welding? (A) Electrode size (B) Plate thickness (C) Voltage across the arc (D) Welded portion length

Description : Which of the following mainly decides the current to be employed is arc welding? (A) Electrode size (B) Plate thickness (C) Voltage across the arc (D) Welded portion length

Last Answer : (A) Electrode size

Coating provided on the electrodes used in the arc welding is not expected to (A) Add alloying elements (B) Prevent electrode from contamination (C) Stabilise the arc (D) Provide protective atmosphere to weld

Description : Coating provided on the electrodes used in the arc welding is not expected to (A) Add alloying elements (B) Prevent electrode from contamination (C) Stabilise the arc (D) Provide protective atmosphere to weld

Last Answer : (B) Prevent electrode from contamination

Cold cracking in the heat affected zone of a high strength steel weld can take place because of the (A) Retained austenite (B) Martensite formation (C) Relatively high sulphur content in the base metal (D) Sufficient hydrogen present in the welding arc

Description : Cold cracking in the heat affected zone of a high strength steel weld can take place because of the (A) Retained austenite (B) Martensite formation (C) Relatively high sulphur content in the base metal (D) Sufficient hydrogen present in the welding arc

Last Answer : (B) Martensite formation

Stainless steel is welded using (A) Oxy-acetylene flame (B) Oxy-hydrogen flame (C) Arc welding (D) Inert gas arc welding

Description : Stainless steel is welded using (A) Oxy-acetylene flame (B) Oxy-hydrogen flame (C) Arc welding (D) Inert gas arc welding

Last Answer : (D) Inert gas arc welding

Expenditure on research and development (R & D) is categorised as the __________, while making an estimate of the total product cost for a chemical plant. (A) Overhead cost (B) Fixed expenses (C) General expenses (D) Direct production cost

Description : Expenditure on research and development (R & D) is categorised as the __________, while making an estimate of the total product cost for a chemical plant. (A) Overhead cost (B) Fixed expenses (C) General expenses (D) Direct production cost

Last Answer : (C) General expenses

Effluent treatment cost in a chemical plant is categorised as the __________ cost. (A) Fixed (B) Overhead (C) Utilities (D) Capital

Description : Effluent treatment cost in a chemical plant is categorised as the __________ cost. (A) Fixed (B) Overhead (C) Utilities (D) Capital

Last Answer : (C) Utilities

Water flow in the river during flood can be categorised as the __________ flow. (A) Unsteady uniform (B) Unsteady non-uniform (C) Steady uniform (D) Steady non-uniform

Description : Water flow in the river during flood can be categorised as the __________ flow. (A) Unsteady uniform (B) Unsteady non-uniform (C) Steady uniform (D) Steady non-uniform

Last Answer : Option B

Argon is used in arc welding because

Description : Argon is used in arc welding because

Last Answer : Argon is used in arc welding because A. low reactivity with metal B. ability to lower the ... of metal C. flammability D. high calorific value

What type of arc welding equipment is necessary when participating in arc welding?

Description : What type of arc welding equipment is necessary when participating in arc welding?

Last Answer : The most important equipment you can have is your safety equipment, your gloves, visor and heavy-duty clothing. You have to have some sort of a power source to generate the electricity necessary for arc welding, so I'd say a power source is your most important arc welding equipment.

In arc welding, Argon is used because of its - (1) Low reactivity with metal (2) Ability to lower the melting point of the metal (3) High flammability (4) High calorific value

Description : In arc welding, Argon is used because of its - (1) Low reactivity with metal (2) Ability to lower the melting point of the metal (3) High flammability (4) High calorific value

Last Answer : (1) Low reactivity with metal Explanation: In arc welding, Argon is used as a shielding gas because it is chemically inert and forms no compounds. At the high temperatures that welding requires, the ... to brittle welds and instability in the welding arc. So,argon and other inert gases are sprayed.

The required DC voltage for arc welding is- (1) 6 to 9 V (2) 50 to 60 V (3) 200 to 250 V (4) 90 to 100 V

Description : The required DC voltage for arc welding is- (1) 6 to 9 V (2) 50 to 60 V (3) 200 to 250 V (4) 90 to 100 V

Last Answer : (3) 200 to 250 V

Projection welding is (i) Electric arc welding (ii) Gas welding (iii)Spot welding (iv) None

Description : Projection welding is (i) Electric arc welding (ii) Gas welding (iii)Spot welding (iv) None

Last Answer : (iv) None

Among gas and electric arc welding, which has the higher rate of heating? a) Gas welding b) Electric arc welding c) Gas welding and electric arc welding have equal rate of heating d) Cannot be determined

Description : Among gas and electric arc welding, which has the higher rate of heating? a) Gas welding b) Electric arc welding c) Gas welding and electric arc welding have equal rate of heating d) Cannot be determined

Last Answer : b) Electric arc welding

When MMA welding what will be the effect on the weld f the power source was changed from AC to DC-ve? a) None b) Higher deposition rate c) It would slightly increase the depth of penetration d) The arc would become unstable

Description : When MMA welding what will be the effect on the weld f the power source was changed from AC to DC-ve? a) None b) Higher deposition rate c) It would slightly increase the depth of penetration d) The arc would become unstable

Last Answer : b) Higher deposition rate

What is a typical ARC voltage setting when welding with the TIG (GTAW) process? a) 18-20V b) 24-26V c) 10-12V d) 70-90V

Description : What is a typical ARC voltage setting when welding with the TIG (GTAW) process? a) 18-20V b) 24-26V c) 10-12V d) 70-90V

Last Answer : c) 10-12V

A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC+ve polarity, and a ROL:of 180mm per min. What would be the arc energy? a) Insufficient information given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Description : A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC ... given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Last Answer : d) 2.0 kJ/mm

Explain the shielded metal arc welding (SMAW) processes with neat sketch. State its two advantages and disadvantages.

Description : Explain the shielded metal arc welding (SMAW) processes with neat sketch. State its two advantages and disadvantages.

Last Answer : Working  : Shielded metal arc welding uses a metallic consumable electrode of a proper composition for generating arc between itself and the parent work piece. The molten electrode metal fills the weld ... . 2. Weld may contain slag inclusions 3. Fumes make difficult the process control.

List common equipments used for arc welding process.

Description : List common equipments used for arc welding process.

Last Answer : 1. A.C. or D.C. machine 2. Electrode (bare or coated) 3. Electrode Holder 4. Cables and its connectors 5. Chipping Hammer 6. Earthing Clamps 7. Wire-brush 8. Helmet 9. Safety Goggles 10. Hand Gloves 11. Apron Sleeves etc.

Describe the working principle of Arc Welding.

Description : Describe the working principle of Arc Welding.

Last Answer : Arc welding is the most extensively employed method of joining metal parts. Here the source of heat is an electric arc. The arc column is generated between an anode which is the positive pole of D.C. ... also melted and is transferred in to the metal in the form of globules of molten metal.  

Draw a schematic of a set up of shielded metal arc welding.

Description : Draw a schematic of a set up of shielded metal arc welding. 

Last Answer : Fig. Shielded metal arc welding set-up

In arc welding, Argon is used because of its (1) Low reactivity with metal (2) Ability to lower the melting point of the metal (3) High flammability (4) High calorific value

Description : In arc welding, Argon is used because of its (1) Low reactivity with metal (2) Ability to lower the melting point of the metal (3) High flammability (4) High calorific value

Last Answer :  Low reactivity with metal

The commonly used gases in tungsten arc welding are

Description : The commonly used gases in tungsten arc welding are 1.Hydrogen and oxygen 2.Hydrogen and organ 3.Hydrogen and helium 4.Helium and argon

Last Answer : The commonly used gases in tungsten arc welding are Helium and argon

For arc welding current range is usually

Description : For arc welding current range is usually  (1) 10 to 15 A (2) 30 to 40 A (3) 50 to 100 A (4) 100 to 350 A

Last Answer : For arc welding current range is usually 100 to 350 A

The supply for arc welding is :

Description : The supply for arc welding is : 

Last Answer : The supply for arc welding is : Low voltage, high current ac or dc voltage

Arc welding uses following electric supply

Description : Arc welding uses following electric supply (A) ac (B) dc (C) both ac and dc (D) spiral waveform 

Last Answer : both ac and dc

Which of the following generators is used for DC arc welding application ?

Description :  Which of the following generators is used for DC arc welding application ? (A) Series generator (B) Shunt generator (C) Differential compound generator (D) Over -compound generator

Last Answer : A

The type of dc generator used for arc welding purposes is a

Last Answer : The type of dc generator used for arc welding purposes is a Differentially compound generator.

Arc blow is a welding defect which is encountered in _________.

Last Answer : Arc blow is a welding defect which is encountered in arc welding using a.c. current.

An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace. (A) Resistance (B) Arc (C) Low frequency induction (D) None of these

Description : An electric furnace producing heat by means of an electric arc struck between each of three electrodes and the charge is called __________ furnace. (A) Resistance (B) Arc (C) Low frequency induction (D) None of these

Last Answer : (B) Arc

__________ furnace is not an electric furnace. (A) Arc (B) Induction (C) Pot (D) Resistance

Description : __________ furnace is not an electric furnace. (A) Arc (B) Induction (C) Pot (D) Resistance

Last Answer : (C) Pot

The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace. (A) Arc(B) Resistance(C) Low frequency induction(D) High frequency induction

Description : The electric furnace in which heat is produced by a combination of induced current and skin effect is called __________ furnace. (A) Arc (B) Resistance (C) Low frequency induction (D) High frequency induction

Last Answer : (D) High frequency induction

__________ furnace is generally used in the non-ferrous foundries. (A) Direct arc (B) Indirect arc (C) Resistance (D) Induction

Description : __________ furnace is generally used in the non-ferrous foundries. (A) Direct arc (B) Indirect arc (C) Resistance (D) Induction

Last Answer : (B) Indirect arc

All welding processes require pressure along with heat. a) Yes b) No, fusion doesn’t require c) Can’t be stated d) None of the listed

Description : All welding processes require pressure along with heat. a) Yes b) No, fusion doesn’t require c) Can’t be stated d) None of the listed

Last Answer : b) No, fusion doesn’t require

In a fusion welding process, (a) only heat is used (b) only pressure is used (c) combination of heat and pressure is used (d) none of these

Description : In a fusion welding process, (a) only heat is used (b) only pressure is used (c) combination of heat and pressure is used (d) none of these

Last Answer : (a) only heat is used

Which of the following defects is usually associated with the MAG GMAW) welding process when using Dip Transfer? a) Centerline cracking b) Lack of side wall Fusion c) Undercut d) Tungsten inclusions

Description : Which of the following defects is usually associated with the MAG GMAW) welding process when using Dip Transfer? a) Centerline cracking b) Lack of side wall Fusion c) Undercut d) Tungsten inclusions

Last Answer : b) Lack of side wall Fusion

Current employed in resistance welding ranges from __________ kVA/cm2. (A) 1.2 to 2.5 (B) 4.5 to 6.2 (C) 7.5 to 8.5 (D) 10.5 to 15.5

Description : Current employed in resistance welding ranges from __________ kVA/cm2. (A) 1.2 to 2.5 (B) 4.5 to 6.2 (C) 7.5 to 8.5 (D) 10.5 to 15.5

Last Answer : Option B

Which of the following is not categorised as a "mechanical operation”? (A) Agitation (B) Filtration (C) Size enlargement (D) Humidification

Description : Which of the following is not categorised as a "mechanical operation”? (A) Agitation (B) Filtration (C) Size enlargement (D) Humidification

Last Answer : (D) Humidification

Which of the following is not categorised as the ore agglomeration process? (A) Nodulising (B) Pelletising (C) Balling (D) Briquetting

Description : Which of the following is not categorised as the ore agglomeration process? (A) Nodulising (B) Pelletising (C) Balling (D) Briquetting

Last Answer : Option C

During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may be caused by __________. A. overheating of the contactor coil B. low voltage on the operating coil C. low insulation resistance to ground D. lubrication of the contact bearing points

Description : During its operation, loud buzzing and resultant welding of contacts of a magnetic relay may be caused by __________. A. overheating of the contactor coil B. low voltage on the operating coil C. low insulation resistance to ground D. lubrication of the contact bearing points

Last Answer : Answer: B