Gas Tungsten Arc welding MCQ Question and Answer | ITI WELDER

ITI Welder Trade Gas Tungsten Arc welding MCQ Question and Answer for CBT Online exam for NCVT AITT (All India Trade Test).  Practice all WELDER Trade MCQ (Multiple choice Question). Also you can practice mock test exam online

WELDER Trade MCQ also useful for competitive exam like PSU Job exam As well as Government Job Exam, Apprentice job.

ITI Welder | Gas Tungsten Arc welding MCQ

1.

What are the types of joint in friction welding?

1. T joint
2. Lap joint
3. Butt joint
4. Corner joint

2.

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

1. Carbon electrode
2. Copper electrode
3. Tungsten electrode
4. Aluminium electrode

3.

What is also referred as a GTAW?

1. TIG welding
2. MIG welding
3. STUD welding
4. GAS welding

4.

What is marked as 'X'?

1. Torch
2. Shield
3. Arc
4. Filler

5.

What type of metals joined in friction welding?

1. Similar metal
2. Dissimilar metal
3. Non metal group
4. Any metal flat type

6.

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

1. Laser beam
2. Ruby rod
3. Cooling system
4. Flash lamp

7.

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

1. Iron
2. Ruby
3. Copper
4. Stainless steel

8.

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

1. Laser beam
2. Ruby rod
3. Cooling system
4. Flash lamp

9.

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

1. Pipe and round rods
2. Flats and square roof
3. Thick sheet
4. Heavy sheet

10.

What is principle of friction welding?

1. One member stationary and another rotating type
2. Both members rotates
3. Both members are heated
4. One member is heated and another rotating

11.

What is the name of the part marked as ‘X in the friction welding?

1. Machine control
2. Rotating metal pipe
3. Non rotating pipe
4. Direction of pressure

12.

What is the name of the part marked as ‘X” in the friction welding?

1. Machine controls
2. Rotating metal pipe
3. Non rotating pipe
4. Direction of pressure

13.

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

1. Seam welding
2. Friction welding
3. Flash butt welding
4. Spot welding

14.

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

1. Fusion stage
2. Non fusion stage
3. Plastic stage
4. Only heating stage

15.

What is the full form of GTAW?

1. Groove tugsten arc welding
2. Grip tugsten arc welding
3. Gas tugsten arc welding
4. Galvanised tugsten arc welding

16.

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

1. 50°
2. 40°
3. 45°
4. 60°

17.

What is the name of the defect marked as ‘x’?

1. Porosity
2. Under cut
3. Slag inclusion
4. Incomplete penetration

18.

What are the types of joint for friction welding?

1. T joints
2. Lap joints
3. Butt joints
4. Corner joints

19.

What is the source of heat in friction welding process?

1. Chemical heating
2. Electrical heating
3. Mechanical friction
4. Thread heating

20.

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

1. Metals with high compressive strength
2. Metals with low compressive strength
3. Metals with high tensile strength
4. Metals with low carbon content

21.

Which welding process is effective for nickel and titanium?

1. Arc welding
2. TIG welding
3. Gas welding
4. MIG welding

22.

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

1. SAW
2. MMAW
3. MIG
4. TIG

23.

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

1. Porosity
2. Lack of penetration
3. Lack of fusion
4. Under cut

24.

What is the bore dia of ceramic nozzle to avoid porosity while doing TIG, welding?

1. Small sized
2. Large sized
3. Correct sized
4. Too small sized

25.

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

1. Long arc length
2. By using DCEP
3. By not using shielding
4. By using contaminated base metal

26.

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

1. Electron gun
2. Electron beam
3. Vacuum chamber
4. Atmosphere

27.

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

1. Laser tube
2. Reflecting mirrors
3. Flash lamps
4. Shutter

28.

Which gas is generally used in gas laser type welding?

1. Carbon - di - oxide
2. Neon gas
3. Argon gas
4. Oxygen

29.

In which welding process the work pieces are melted and jointed by narrow beam of light source?

1. Electron beam welding
2. Laser beam welding
3. Plasma arc welding
4. Micro plasma arc welding

30.

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

1. Spot size
2. Deflection
3. Weld penetration
4. Focal position / focus current

31.

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

1. 1500 rpm
2. 2000 rpm
3. 2500 rpm
4. 3000 rpm

32.

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

1. Similar metal
2. Dissimilar metals
3. Non metal group
4. Any metal flat type

33.

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

1. Argon
2. Oxygen
3. Hydrogen
4. Acetylene

34.

What is the purpose of inert gas used in TIG welding?

1. Contamination in the weld metal
2. To protect the molten metal from the atmospheric contamination
3. To stabilize the Arc
4. To get more spatters

35.

Which gas is issued as inert gas in GTAW for increased speed?

1. Oxygen
2. Helium
3. Acetylene
4. Hydrogen

36.

How much temperature GTAW process can produce?

1. 3000°F
2. 3500°F
3. 4000°F
4. 4500°F

37.

What is the main source of heat to the workpiece in TIG welding?

1. Cable current
2. By Torch
3. By tube
4. By electrode

38.

How heat effected zone is covered and protected from atmospheric contaminations in GTAW?

1. Argon gas
2. Oxygen gas
3. Fuel gas
4. Active gas

39.

What is the use of a little hydrogen added to argon for welding of stainless steel in GTAW process?

1. Improcess heat
2. Improves heat transfer
3. Improves good welding
4. Improves metal property

40.

How molten metal is shielded from the atmospheric contamination as a blanket in GTAW?

1. By using inert gas
2. By using fuel gas
3. By using supportable gas
4. By using fuel and supportable gas

41.

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

1. Through copper nozzle
2. Through brass nozzle
3. Through ceramic nozzle
4. Through metal nozzle

42.

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

1. Collet
2. Adaptor
3. Ceramic nozzle
4. Electrode cap

43.

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

1. To produce the AC
2. To change AC to DC
3. To produce power supply
4. To initiate the arc without touching the electrode on the base metal

44.

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

1. Air cooled
2. Oil cooled
3. Gas cooled
4. Water cooled

45.

Which electrode is used in TIG welding process?

1. Zinc electrode
2. Carbon electrode
3. Tungsten
4. Magnesium electrode

46.

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

1. Flow meter
2. CO2 regulator
3. Pressure meter
4. Argon regulator

47.

Which gas is chemically in active with any metals in hot or cold condition in TIG welding?

1. Argon
2. Oxygen
3. Nitrogen
4. Hydrogen

48.

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

1. Pure tungsten electrode
2. Cerium tungsten electrode
3. Thoriated tungsten electrode
4. Zirconium tungsten electrode

49.

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

1. Pouring
2. Purging
3. Pre filling
4. Pool weld

50.

Which electrode is used to produce arc in GTAW process?

1. M.S electrode
2. Cast iron electrode
3. Tungsten electrode
4. Stainless steel electrode

51.

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

1. Slag
2. Over lap
3. Under cut
4. Penetration

52.

Which process can easily weld thin metal?

1. MIG welding
2. Tungsten arc welding
3. Submerged arc welding
4. Manual metal arc welding

53.

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

1. Inert gas protects the weld
2. It helps in melting the electrode
3. It prevents porosity
4. It is cheap

54.

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

1. AC welding machine
2. DC welding machine
3. AC DC transformer
4. DC transformer

55.

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

1. Crack
2. Porosity
3. Under cut
4. Lack of penetration

56.

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

1. Crack
2. Porosity
3. Under cut
4. Lack of fusion

57.

What is the reason for unstable arc in DC TIG welding process?

1. Improper tungsten size
2. Improper shielding gas flow
3. Improperly prepared tungsten
4. Weld circuit polarity is incorrect

58.

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

1. Too much arc length
2. Excessive heating in torch
3. Tungsten melting into weld puddle
4. Contaminated or improper filler metal