Arc and Gas Welding MCQ Question and Answer | ITI Mechanic Diesel

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

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ITI Mechanic Diesel | Arc and Gas Welding MCQ

1.

What is the Quenching media of normalising?

1. Water spray
2. Open air
3. Oil bath
4. Water bath

2.

What is the name of welding device?

1. Motor generator
2. Engine generator
3. Regulator
4. Alternator

3.

What is the name of edge preparation and setup in welding process?

1. Single ‘V’ Butt
2. Flange butt
3. Lap butt
4. Corner butt

25.

What is the name of part marked as ‘X’?

1. Nozzle
2. Handle
3. Oxygen control valve
4. Acetylene control valve

26.

What is the name of part marked as ‘X’?

1. Switch
2. Ceramic nozzle
3. Welding current
4. Tungsten electrode

27.

What is the name of part marked as ‘X’?

1. Pilot arc
2. Electrode
3. Weld pool
4. Contact tube

28.

Which one is the heat treatment process?

1. Casting
2. Machining
3. Welding
4. Annealing

29.

Which quenching media applied in the flame hardening process?

1. Still air
2. Oil bath
3. Brine solution bath
4. Water spray

30.

What is the purpose of hardening?

1. Increase ductility
2. Increase malleability
3. Increase strength
4. Increase britlenesss

31.

What is the purpose of annealing?

1. Improve hardness
2. Improve machinability
3. Improve brittleness
4. Improve weldability

32.

What is the advantage of AC arc welding machine?

1. More initial cost
2. Freedom from arc blow
3. More maintenance cost
4. Un suitable for non ferrous metal

33.

What is the advantage of using rectifier set in arc welding machine?

1. Suitable for all ferrous and non- ferrous
2. Initial cost is higher
3. Maintenance cost is more
4. Special safety precaution required

34.

What is the name of welding process?

1. Arc welding
2. Carbon arc welding
3. Plasma arc welding
4. Submerged arc welding

35.

Which machine can be used any where in the field for welding away from electric main supply?

1. Motor generator set
2. Engine generator set
3. AC arc welding machine
4. AC welding transformer with a rectifier

36.

Which one of the following metals cannot be welded by AC welding machine?

1. Brass
2. Cast iron
3. Mild steel
4. High carbon steel

37.

Which is the safety method for carry the oxy-acetylene gas cylinders?

1. Rolling
2. Sliding
3. Dragging
4. Use a trolly

38.

Which is the stage of heat treatment process?

1. Cooling the metal
2. Heating the metal slowly
3. Hold at a given temperature
4. Heat and cool the metal as soon as possible

39.

What is the importance of case hardening?

1. To increase softness
2. To withstand wear resistance
3. To withstand heavy load
4. To decrease the brittleness

40.

Which valve to be closed first while gas flame snaps out and back fire?

1. Oxygen valve in cylinder
2. Oxygen valve at blow pipe
3. Acetylene valve in cylinder
4. Acetylene valve at blow pipe

41.

Which gas cutting process is suitable for all position, location and under water?

1. Gas cutting
2. Plasma cutting
3. Manual cutting
4. Machine cutting

4.

What is the name of edge preparation method used in welding process?

1. Single ‘V’ Butt
2. Soldering
3. Riveting
4. Brazing

5.

Which type of physical transformation takes place during arc welding process?

1. Colour transfer
2. Metal transfer
3. Current transfer
4. Heat transfer

6.

What is the colour of acetylene gas cylinder?

1. Red
2. Maroon
3. Black
4. Peacock blue

7.

What is the colour of oxygen gas cylinder?

1. Red
2. Maroon
3. Black
4. Peacock blue

8.

What is the name of oxy- acetylene gas flame?

1. Arc flame
2. Neutral flame
3. Carburising flame
4. Oxidising flame

9.

What is the name of the weld joint?

1. Double ‘V’ butt
2. Double ‘U’ butt
3. Single bevel butt
4. Double j butt

10.

Name the welding process?

1. Plasma arc welding
2. Electro - slag welding
3. Gas metal arc welding
4. Submerged arc welding

11.

What is the dia of medium coated MS electrode used in fillet weld lap joint with 110/120 Amps welding current?

1. 1.0 mm
2. 1.5 mm
3. 2.5 mm
4. 3.15 mm

12.

What is the electrode angle with weld line?

1. 70° to 80°
2. 50° to 60°
3. 45° to 50°
4. 35° to 40°

13.

Which is protecting the eyes from harmful rays of the electric arc welding?

1. Helmet
2. Lather apron
3. Lather gloves
4. Welding helmet screen

14.

What is the name of equipment?

1. Motor generator set
2. Engine generator set
3. DC generator machine
4. Alternating current welding machine

15.

What is the name of part marked as ‘X’?

1. Regulator
2. Blow pipe
3. Spark lighter
4. None - return disc

16.

Which solution is used for acetylene gas connection leakage test?

1. Kerosene
2. Naked fire
3. Soap water
4. Fresh water

17.

What is the colour of hose carrying oxygen?

1. Red
2. Black
3. Maroon
4. Peacock blue

18.

What is the colour of hose carrying

1. Red
2. Black
3. Maroon
4. Peacock blue

19.

What is the name of part marked as ‘X’?

1. Safety plug
2. Valve socket
3. Valve spindle
4. Dissolved acetylene

20.

What is the name of process?

1. Annealing
2. Carburising
3. Normalising
4. Case hardening

21.

Which type of hardening used eddy current in the metal bar?

1. Flame hardening
2. Nitriding hardening
3. Induction hardening
4. Annealing hardening

22.

Which type of hardening used for cam shaft production?

1. Annealing
2. Carburising
3. Normalising
4. Induction hardening

23.

What is the name of process?

1. Nitriding
2. Annealing
3. Carburising
4. Induction hardening

24.

What is the name of gas flame?

1. Neutral flame
2. Starting flame
3. Oxidising flame
4. Carburising flame