Welding question and answer set- 1

             Welding question and answer

MCQ type welding question and answer in given below

1. Neutral flame is obtained by supplying -

    a) Equal volume of oxygen and acetylene

    b) More volume of acetylene and less volume of oxygen

    c) More volume of oxygen and less volume of acetylene

    d) None of these

    Ans (a)

2. If the weld is made from left to right, it is known as -

    a) Forehand welding 

    b)Backhand welding 

    c) Vertical welding 

    d) None of these above 

    Ans.(a)

3. In arc welding, arc is created between the electrode and work by-

    a) Flow of current 

    b) Voltage 

    c) Contact resistance 

    d) Electrical energy

    Ans.(c)

4. The material used for coating the electrode is called 

    a) Productive layer

    b) Binder

    c) Slag

    d) Flux

    Ans. (d)

5. The advantage of  Thermit welding is that 

    a) All part of the weld section are molten at the same time 

    b) Weld cool almost uniformly

    c) Results in a minimum problem with internal residual stresses

    d) All of these above

    Ans .( d) 

6. For gas welding, the pressure desired at the welding torch for oxygen is

    a) 7 to 103 kN/m²

    b) 70 to 280 kN/m²

    c) 280 to 560 kN/m²

    d) 560 to 840 kN/m²

    Ans.(b)

7. In welding magnesium with TIG arc welding, direct current with _____is used.

    a) Straight polarity

    b) Reversed polarity

    c) Both (a) & (b)

    d) None of these

    Ans. (b)

8. Thermit, used in thermit welding is a mixture of -

    a) Charcoal and iron oxide

    b) Charcoal and aluminum 

    c) Iron oxide and aluminum

    d) Charcoal, iron oxide and aluminum

    Ans. ( c)

9. Which of the following welding process uses non-consumable electrode?

    a) TIG welding

    b) MIG welding 

    c) Manual Metal Arc welding 

    d) Submerged arc welding

    Ans.( a)

10. The material which can be best cut with oxygen cutting process is -

    a) Mild steel

    b) Brass 

    c) Copper

    d) Aluminum

    Ans. (a)

11. The oxy-acetylene gas welding produce a flame temperature of- 

    a)  1800°C

    b) 2100°C

    c) 2400°C

    d) 3200°C

    Ans. (d)

12. The brass and bronze are welded by ___flame.

    a) Neutral

    b) Oxidizing

    c) Carburising

    d) All of these above

    

    Ans. (b)

13. Most of the oxyacetylene welding is done with- 

    a) Neutral flame

    b) Oxidizing flame 

    c) Carburising flame 

    d) All of these above

    Ans. (a)

14. In ___welding, the weld may be made either from right to left

    a) Forehand

    b) Backhand

    c) Vertical

    d) None of these

    Ans. (b)

15. In electric resistance welding, voltage required for heating is -

    a)1 to 5 volts

    b) 6 to 10 volts

    c) 11 to 20 volts

    d) 50 to 100 volts

    Ans. (

16. The oxygen cylinder is usually painted with

    a) Black colour

    b) White colour

    c) Maroon colour

    d) Yellow colour

    Ans. (a)

17. Submerged arc welding uses the following type of electrode

    a) Bare rods

    b) Coated electrodes

    c) Core wires

    d) Copper electrodes

    Ans.( a)

18. The flux in brazing process is used in the form of -

    a) Power 

    b) Liquid

    c) Paste

    d) None of these above

    Ans. (c)

19. Carburising Flame has-

    a) 1 zone

    b) 2 zone

    c) 3 zone

    d) 4 zone

    

    Ans. ( c)

20. Soldering may be carried out with filler melts at temperature of -

    a) 200°C

    b) 460°C

    c) 960°C

    d) 500°C

    Ans. (b)

21. The diameter of electrode used in submerged arc welding generally ranges from 

    a) 1 - 2 mm

    b) 1 - 5 mm

    c) 2 - 6 mm

    d) 3 - 7 mm

    Ans. (c)

22. Which welding is employed to produce high quality welds for critical application such as joining of nuclear and aero- space components ?

    a) TIG

    b) Electro slag

    c) Resistance welding

    d) Submerged arc welding

    Ans. (a)

23. In gas welding the highest temperature is obtained with 

    a) Neutral flame

    b) Oxidizing flame

    c) Reducing flame 

    d) Both (a) & ( b)

    Ans. (b)

24. Distortion in welding occurs due to- 

    a) Use of excessive current

    b) Improper clamping methods

    c) Use of wrong electrodes

    d) Oxidation of weld pool

    Ans. (b)

25. Acetylene is stored in the gas cylinder-

    a) In gaseous form

    b) In liquid form

    c) In solid form

    d) Under high pressure

    Ans. ( b)

26. In resistance welding the electrode material made of- 

    a) Carbon steel 

    b) Copper

    c) Stainless steel

    d) High speed

    Ans. (b)

27. What is the type of welding defect caused due to poor deposition of weld rod is called?

    a) Porosity

    b) Undercut

    c) Under fill

    d) Crack

    Ans. (

    28. What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?

    a) Ultrasonic welding

    b) Forge welding

    c) Electron beam welding

    d) Friction welding

    Ans. (d)

29. In a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as- 

    a) ARC

    b) Short Arc

    c) ARC length 

    d) ARC blow

    Ans. ( b)

30. When two main plates are kept in alignment butting each other and riveted with cover plate on both side of the main plate with two row of rivets in each main plate, the join is known as____ double cover butt joint.

    a) Single riveted

    b) Double riveted

    c) Both (a) & ( b)

    d) None of these above

    Ans. (b)