Welding Objective Type Questions and Answers

Questions

21 The phenomeon of weld decay occurs in.......

A Cast iron

B Brass

C Bronze

D Stainless steel

View Answer

Answer: Stainless steel

22 Preheating is essential in welding for......

A High speed steel

B Stainless steel

C Cast iron

D German silver

View Answer

Answer: Cast iron

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23 The following welding process uses consumable electrodes.......

A TIG

B MIG

C Thermit

D Gas

View Answer

Answer: MIG

24 The suitable welded material used in TIG welding is.......

A Aluminium

B Stainless steel

C Magnesium

D All of the above

View Answer

Answer: All of the above

25 Flash butt welding is.......

A Gas welding

B Arc welding with straight polarity

C Arc welding with reverse polarity

D Resistance welding

View Answer

Answer: Resistance welding

26 Seam welding is.......

A Arc welding

B Multi spot welding

C Continuous welding

D Gas welding

View Answer

Answer: Continuous welding

27 Which type of electrode is used in submerged arc welding......

A Bare rods

B Coated electrodes

C Core wires

D Copper electrodes

View Answer

Answer: Bare rods

28 In resistance welding the electrode material is made of.......

A Carbon steel

B Stainless steel

C Copper

D High speed steel

View Answer

Answer: Copper

29 Too slow welding speed in arc welding would result in.......

A Excessive piling up of weld metal, poor penetration, wasted electrodes

B Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes

C Too small bead, weak weld, and wasted electrodes

D Excessive pillling up of weld metal, overlapping without penetration of edges, wasted electrodes

View Answer

Answer: Excessive pillling up of weld metal, overlapping without penetration of edges, wasted electrodes

30 The melting point of the filler metal in brazing should be above.......

A 420o C

B 820o C

C 1020o C

D 1200o C

View Answer

Answer: 420o C

31 Too fast welding speed in arc welding would result in.......

A Excessive piling up of weld metal, poor penetration, wasted electrodes

B Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes

C Too small bead, weak weld, and wasted electrodes

D None of the above

View Answer

Answer: Too small bead, weak weld, and wasted electrodes

32 Too high welding current in arc welding would result in......

A Excessive piling up of weld metal, poor penetration, wasted electrodes

B Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes

C Too small bead, weak weld, and wasted electrodes

D None of the above

View Answer

Answer: Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes

33 Too low welding current in arc welding would result in.......

A Excessive piling up of weld metal, poor penetration, wasted electrodes

B Excessive spatter, under cutting along edges, irregular deposits, wasted electrodes

C Too small bead, weak weld, and wasted electrodes

D None of the above

View Answer

Answer: Excessive piling up of weld metal, poor penetration, wasted electrodes

34 In arc welding, if arc is too long, it will result in.......

A Electrode sticking to the base metal and base metal not melting and bead resting on top of the work, leading to poor fusion and gas and slag holes

B Formation of large globules in an irregular pattern because of wandering of arc, leading of poor fusion with base petal

C Arc extinction

D Operator hazard

View Answer

Answer: Formation of large globules in an irregular pattern because of wandering of arc, leading of poor fusion with base petal

35 In arc welding, if arc is too short, it will result in.......

A Electrode sticking to the base metal and base metal not melting and bead resting on top of the work, leading to poor fusion and gas and slag holes

B Formation of large globules in an irregular pattern because of wandering of arc, leading of poor fusion with base petal

C Arc extinction

D Operator hazard

View Answer

Answer: Electrode sticking to the base metal and base metal not melting and bead resting on top of the work, leading to poor fusion and gas and slag holes

36 Arc stability is better with.......

A AC welding

B DC welding

C Both AC with DC welding

D Specially designed wave forms

View Answer

Answer: AC welding

37 Arc length in arc welding should be equal to......

A Half the diameter of electrode rod

B Rod diameter

C Twice the rod diameter

D 2.5 times the rod diameter

View Answer

Answer: Rod diameter

38 Arc welding in arc welding should be nearly equal to.......

A Diameter of electrode rod (d)

B 1.5 d

C 2 d

D 3 d

View Answer

Answer: Diameter of electrode rod (d)

39 Which of the following carbon steel is most weldable.......

A 0.15 % carbon steel

B 0.30 % carbon steel

C 0.50 % carbon steel

D 0.75 % carbon steel

View Answer

Answer: 0.15 % carbon steel

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