Manufacturing Technology (3151912) MCQs

MCQs of Metal Joining Processes

Showing 51 to 60 out of 137 Questions
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51.

In TIG arc welding, the welding zone is shielded by an atmosphere of

(a)

Nitrogen gas
(b)

argon gas
(c)

Qxygen gas
(d)

none of these
Answer:

Option (c)

52.

TIG welding is best suited for welding

(a)

Mild steel
(b)

Aluminium
(c)

Carbon steel
(d)

Silver
Answer:

Option (a)

53.

In the manual TIG welding, the angle of the electrode holder with the direction of welding is ,

(a)

30°
(b)

45°
(c)

60°
(d)

70°
Answer:

Option (d)

54.

Which of the following metals can be suitably welded by TIG welding

(a)

Aluminium
(b)

Magnesium
(c)

Pure titanium
(d)

All of the above
Answer:

Option (d)

55.

The consumable electrode is used in

(a)

carbon arc welding
(b)

submerged arc welding
(c)

TIG arc welding
(d)

MIG arc welding
Answer:

Option (d)

56.

In MIG welding, the metal is transferred in the form of

(a)

A fine spray of metal
(b)

Molten drops
(c)

Molten drops
(d)

Molecules
Answer:

Option (a)

57.

In which of the following welding techniques, the weld pool is surrounded by an inert gas

(a)

Arc welding
(b)

Carbon arc
(c)

MIG
(d)

Electroslag welding
Answer:

Option (c)

58.

 In MIG welding, helium or organ is used in order to

(a)

Provide cooling effect
(b)

Act as flux
(c)

Act as shielding medium
(d)

Facilitate welding process
Answer:

Option (c)

59.

The main advantage of MIG welding over TIG welding is that

(a)

Former can be used to weld hard to weld metal
(b)

Former permits use of large currents thereby allowing higher deposition
(c)

Welding rate is very fast
(d)

Welding is completely automatic
Answer:

Option (b)

60.

 Metal deposited on to the workpiece from the electrode

(a)

Is forced across the arc
(b)

Falls because of gravity
(c)

Is attracted towards the workpiece due to the positive polarity of the workpiece
(d)

Is attracted towards the workpiece due to the negative polarity of the work-piece
Answer:

Option (a)

Showing 51 to 60 out of 137 Questions
3 4 5 6 7 8