Semester 2: Module 3 -Gas Tungsten Arc welding

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NAME OF THE ITI *

MOBILE NUMBER *

1 : What are the types of joint in friction welding? *

2 points

A : T joint

B : Lap joint

C : Butt joint

D : Corner joint

2 : What is the non-consumable electrode of high melting point used in TIG welding? *

2 points

A : Carbon electrode

B : Copper electrode

C : Tungsten electrode

D : Aluminium electrode

3 : What is also referred as a GTAW? *

2 points

A : TIG welding

B : MIG welding

C : STUD welding

D : GAS welding

4 : What is marked as X? *

1 point

A : Torch

B : Shield

C : Arc

D : Filler

5 : What type of metals joined in friction welding? *

1 point

A : Similar metal

B : Dissimilar metal

C : Non metal group

D : Any metal flat type

6 : What is the name of the part marked as ‘X’in the Laser beam welding? *

1 point

A : Laser beam

B : Ruby rod

C : Cooling system

D : Flash lamp

7 : What crystal (rod) is used in laser beam welding? *

2 points

A : Iron

B : Ruby

C : Copper

D : Stainless steel

8 : What is the name of the part marked as ‘X’in the Laser beam welding? *

1 point

A : Laser beam

B : Ruby rod

C : Cooling system

D : Flash lamp

9 : What type of metal section can be welded by friction welding? *

2 points

A : Pipe and round rods

B : Flats and square roof

C : Think sheet

D : Heavy sheet

10 : What is principle of friction welding? *

2 points

A : One member stationary and another rotating type

B : Both members rotates

C : Both members are heated

D : One member is heated and another rotating

11 : What is the name of the part marked as Xin the friction welding? *

1 point

A : Machine control

B : Rotating metal pipe

C : Non rotating pipe

D : Direction of pressure

12 : Which welding process does not require the supply of external heat? *

2 points

A : Seam welding

B : Friction welding

C : Flash butt welding

D : Spot welding

13 : What stage of the metal the friction welding is completed by applying high pressure? *

2 points

A : Fusion stage

B : Non fusion stage

C : Plastic stage

D : Only heating stage

14 : What is the full form of GTAW? *

2 points

A : Groove tungsten arc welding

B : Grip tungsten arc welding

C : Gas tungsten arc welding

D : Galvanised tungsten arc welding

15 : What is the angle of electrode tip by setting DCEN for SS welding by TIG welding process? *

2 points

A : 50° c

B : 40° c

C : 45° c

D : 60°c

16 : What is the name of the defect marked as‘X’? *

1 point

A : Porosity

B : Under cut

C : Slag inclusion

D : Incomplete penetration

17 : What is the source of heat in friction welding process? *

1 point

A : Chemical heating

B : Electrical heating

C : Mechanical friction

D : Thread heating

18 : Which of the following properties of metal will not allow the application of friction welding? *

2 points

A : Metals with high compressive strength

B : Metals with low compressive strength

C : Metals with high tensile strength

D : Metals with low carbon content

19 : Which welding process is effective for nickel and titanium? | *

1 point

A : Arc welding

B : TIG welding

C : Gas welding

D : MIG welding

20 : Which is the welding process that maintains electric arc between non-consumable tungsten electrode and the base metal? *

2 points

A : SAW

B : MMAW

C : MIG

D : TIG

21 : What is the name of the defect in which the weld metal did not melt with base metal in TIG process? *

2 points

A : Porosity

B : Lack of penetration

C : Lack of fusion

D : Under cut

22 : What is the name of the defect in which the weld metal did not melt with base metal in TIG process? *

2 points

A : Small sized

B : Large sized

C : Correct sized

D : Too small size

23 : How to avoid burning fast of tungsten in TIG welding process? *

2 points

A : Long arc length

B : By using DCEP

C : By not using shielding

D : By using contaminated base meta

24 : Which part the equipment the electron beam is direct and controlled in an electron beam welding process? *

2 points

A : Electron gun

B : Electron beam

C : Vacuum chamber

D : Atmosphere

25 : What devices are provided to reflect the light coming to the ends of ruby rod in laser beam welding? *

2 points

A : Laser tube

B : Reflecting mirrors

C : Flash lamps

D : Shutter

26 : Which gas is generally used in gas laser type welding? *

2 points

A : Carbon - di - oxide

B : Neon gas

C : Argon gas

D : Oxygen

27 : In which welding process the work pie Cesarean melted and jointed by narrow beam of light source? *

2 points

A : Electron beam welding

B : Laser beam welding

C : Plasma arc welding

D : Micro plasma arc welding

28 : Which is adjusted in Electron beam welding to eliminate the defect of porosity? *

2 points

A : Spot size

B : Deflection

C : Weld penetration

D : Focal position / focus curren

29 : What is the approximate revolution of rotating member in friction welding process, to effect the weld joint? *

2 points

A : 1500 rpm

B : 2000 rpm

C : 2500 rpm

D : 3000 rpm

30 : Which type of material friction welding is more suitable, for joining? *

2 points

A : Similar metal

B : Dissimilar metals

C : Non metal group

D : Any metal flat type

31 : Which gas is inactive or deficient is active chemical properties in TIG welding? *

2 points

A : Argon

B : Oxygen

C : Hydrogen

D : Acetylene

32 : What is the purpose of inert gas used in TIG welding *

2 points

A : Contamination in the weld metal

B : To protect the molten metal from the atmospheric contamination

C : To stabilize the Arc

D : To get more spatter

33 : Which gas is used as inert gas in GNAW for increased speed? *

2 points

A : Oxygen

B : Helium

C : Acetylene

D : Hydrogen

34 : How much temperature GNAW process can produce? *

2 points

A : 3000°F

B : 3500°F

C : 4000°F

D : 4500°F

35 : What is the main source of heat to the work piece in TIG welding? *

2 points

A : Cable current

B : By Torch

C : By tube

D : By electrode

36 : How heat effected zone is covered and protected from atmospheric contamination awning? *

2 points

A : Argon gas

B : Oxygen gas |

C : Fuel gas

D : Active gas

37 : What is the use of a little hydrogen added to argon for welding of stainless steel in GNAW process? *

2 points

A : Improcess heat

B : Improves heat transfer

C : Improves good welding

D : Improves metal property

38 : How molten metal is shielded from the atmospheric contamination as a blanket in GNAW? *

2 points

A : By using inert gas

B : By using fuel gas

C : By using supportable gas

D : By using fuel and supportable gas

39 : How is the inert gas directed to flow over weld pool, in TIG welding? *

2 points

A : Through copper nozzle

B : Through brass nozzle

C : Through ceramic nozzle

D : Through metal nozzle

40 : What is the name of the part of TIG torch for holding tungsten electrode? *

1 point

A : Collet

B : Adaptor

C : Ceramic nozzle

D : Electrode cap

41 : What is the purpose of H.F. unit in TIG welding? *

1 point

A : To produce the AC

B : To change AC to DC

C : To produce power supply

D : To initiate the arc without touching the electrode on the base meta

42 : Which type of cooling system is used in heavy duty welding operations? *

2 points

A : Air cooled

B : Oil cooled

C : Gas cooled

D : Water cooled

43 : Which electrode is used in TIG welding process? *

1 point

A : Zinc electrode

B : Carbon electrode

C : Tungsten

D : Magnesium electrode

44 : What is the device used to show the volume of the inert gas allowed to go to the welding torch in TIG welding? *

2 points

A : Flow meter

B : CO2 regulator

C : Pressure meter

D : Argon regulato

45 : Which gas is chemically inactive with any metals in hot or cold condition in TIG welding? *

2 points

A : Argon

B : Oxygen

C : Nitrogen

D : Hydrogen

46 : Which type of tungsten electrode is suitable for welding of SS by TIG process with DC? *

2 points

A : Pure tungsten electrode

B : Cerium tungsten electrode

C : Thoriated tungsten electrode

D : Zirconium tungsten electrode

47 : What is the process of replacing the air in a pipe with argon gas that will not react with the root of the weld? *

2 points

A : Pouring

B : Purging

C : Pre filling

D : Pool weld

48 : Which electrode is used to produce arc in GNAW process? *

1 point

A : M.S electrode

B : Cast iron electrode

C : Tungsten electrode

D : Stainless steel electrode

49 : Which will not be present on the weld bead due to use of shielding gas in TIG welding process *

2 points

A : Slag

B : Over lap

C : Under cut

D : Penetration

50 : Which process can easily weld thin metal? *

2 points

A : MIG welding

B : Tungsten arc welding

C : Submerged arc welding

D : Manual metal arc welding

51: Why argon gas is used in welding of stainless steel welding in TIG welding process? *

2 points

A : Inert gas protects the weld

B : It helps in melting the electrode

C : It prevents porosity

D : It is cheap

52 : Which welding machine is to be used for welding of aluminium by TIG welding process? *

2 points

A : AC welding machine

B : DC welding machine |

C : AC DC transformer

D : DC transformer

53 : What is the defect caused by high current in TIG welding? *

2 points

A : Crack

B : Porosity

C : Under cut

D : Lack of penetration

54 : What is the defect while TIG welding if the current is too low? *

2 points

A : Crack

B : Porosity

C : Under cut

D : Lack of fusion

55: What is right about DCRP electrode TIG welding ? *

2 points

A : Improper tungsten size

B : Improper shielding gas flow

C : Improperly prepared tungsten

D : Weld circuit polarity is incorrect

56 : What is the cause for poor weld bead colour in TIG welding process? *

2 points

A : Too much arc length

B : Excessive heating in torch

C : Tungsten melting into weld puddle

D : Contaminated or improper filler metal

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