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Electrical Welding MCQ Questions and Answers Page - 1

1.

During resistance welding heat produced at the joint is proportional to

Answer/ Hint      

Answer : A

Explanation :

2.

Grey iron is usually welded by   ____________ welding.

Answer/ Hint      

Answer : A

Explanation :

3.

The metal surfaces, for electrical resistance welding must be __________

Answer/ Hint      

Answer : B

Explanation :

4.

In a welded joint poor fusion is due to which of the following?

Answer/ Hint      

Answer : A

Explanation :

5.

For arc welding, DC is produced by which of the following?

Answer/ Hint      

Answer : A

Explanation :

6.

_____________   welding process uses consumable electrodes.

Answer/ Hint      

Answer : B

Explanation :

7.

Which of the following equipment is generally used for arc welding?

Answer/ Hint      

Answer : D

Explanation :

8.

Which of the following is not an inert gas?

Answer/ Hint      

Answer : B

Explanation :

9.

Electronic components are joined by which of the following methods?

Answer/ Hint      

Answer : B

Explanation :

10.

Resistance welding cannot be used for

Answer/ Hint      

Answer : A

Explanation :

11.

Electric arc welding process produces temperature upto

Answer/ Hint      

Answer : D

Explanation :

12.

Increased heat due to shorter arc is harmful on account of

Answer/ Hint      

Answer : D

Explanation :

13.

Arc blow results in which of the following?

Answer/ Hint      

Answer : D

Explanation :

14.

In seam welding

Answer/ Hint      

Answer : C

Explanation :

15.

In arc welding major personal hazards are

Answer/ Hint      

Answer : D

Explanation :

16.

In spot welding composition and thickness of the base metal secedes

Answer/ Hint      

Answer : D

Explanation :

17.

Helium produces which of the following?

Answer/ Hint      

Answer : D

Explanation :

18.

Due to which of the following reasons aluminium is difficult to weld?

Answer/ Hint      

Answer : C

Explanation :

19.

Welding leads have

Answer/ Hint      

Answer : C

Explanation :

20.

Air craft body is

Answer/ Hint      

Answer : D

Explanation :

21.

For arc welding current range is usually

Answer/ Hint      

Answer : D

Explanation :

22.

Spot welding is used for

Answer/ Hint      

Answer : A

Explanation :

23.

Galvanising is a process of applying a layer of

Answer/ Hint      

Answer : D

Explanation :

24.

A seamless pipe has

Answer/ Hint      

Answer : D

Explanation :

25.

Motor-generator set for DC arc welding has generator of

Answer/ Hint      

Answer : D

Explanation :

26.

Plain and butt welds may be used on materials upto thickness of nearly

Answer/ Hint      

Answer : C

Explanation :

27.

In argon arc welding argon is used as a

Answer/ Hint      

Answer : D

Explanation :

28.

During arc welding as the thickness of the metal to be welded increases

Answer/ Hint      

Answer : B

Explanation :

29.

In DC arc welding

Answer/ Hint      

Answer : B

Explanation :

30.

The purpose of coating on arc welding electrodes is to

Answer/ Hint      

Answer : D

Explanation :

31.

50 percent duty cycle of a welding machine means

Answer/ Hint      

Answer : D

Explanation :

32.

During carbon arc welding if electrode is connected to positive

Answer/ Hint      

Answer : D

Explanation :

33.

In which of the following methods of welding the molten metal is poured for joining the metals?

Answer/ Hint      

Answer : A

Explanation :

34.

In atomic hydrogen welding the electrode is made of

Answer/ Hint      

Answer : C

Explanation :

35.

The porosity of welded joint may be caused by

Answer/ Hint      

Answer : C

Explanation :

36.

In electrical resistance welding the greatest resistance is offered by which of the following?

Answer/ Hint      

Answer : D

Explanation :

37.

The tips of the electrodes, for spot welding, are made of

Answer/ Hint      

Answer : A

Explanation :

38.

During spot welding the current flows for

Answer/ Hint      

Answer : B

Explanation :

39.

_____________ welding is not a resistance welding process.

Answer/ Hint      

Answer : D

Explanation :

40.

The power factor of a spot-welding machine is expected to be around

Answer/ Hint      

Answer : C

Explanation :

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