Manufacturing Technology (3151912) MCQs

MCQs of Metal Joining Processes

Showing 81 to 90 out of 137 Questions
6 7 8 9 10 11
81.

The arc in atomic hydrogen welding takes place between the

(a)

Parent metals
(b)

Two tungsten electrodes
(c)

Non-consumable tungsten electrode and workpiece
(d)

Consumable tungsten electrode and filler rod
Answer:

Option (b)

82.

Following equipment is used for arc welding a material by carbon electrode

(a)

A.C. welding set
(b)

Rectifier
(c)

Motor generator
(d)

D.C. welding set with straight polarity
Answer:

Option (d)

83.

 Stud and projection welding belong to the following category of welding

(a)

Gas welding
(b)

Arc welding
(c)

Resistance welding
(d)

Pressure welding
Answer:

Option (c)

84.

In resistance welding, voltage used for heating is

(a)

1 V
(b)

10 V
(c)

100 V
(d)

500V
Answer:

Option (b)

85.

In, resistance welding, the pressure is released

(a)

Just at the time of passing the current
(b)

After completion of current
(c)

After the weld cools
(d)

During heating period
Answer:

Option (c)

86.

Welding process in which two pieces to be jointed are overlapped and placed between two electrodes is known as

(a)

Percussion welding
(b)

Projection welding
(c)

Seam welding
(d)

Spot welding
Answer:

Option (d)

87.

In spot welding, the spacing between two spot weld should not be less than

(a)

d
(b)

1.5 d
(c)

3 d
(d)

6 d
Answer:

Option (c)

88.

In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to

(a)

d
(b)

1.5 d
(c)

3 d
(d)

6 d
Answer:

Option (b)

89.

Spot welding is used for welding

(a)

lap joints in plates having 0.025 mm to 1.25 mm thickness
(b)

lap joints in plates having thickness above 3 mm
(c)

butt joints in plates having 0.025 mm to 1.25 mm thickness
(d)

butt joints in plates having thickness above 3 mm
Answer:

Option (a)

90.

Submerged arc welding is

(a)

A process which uses a mixture of iron oxide and granular aluminium
(b)

Accomplished by maintaining a hot molten metal pool between plates
(c)

A process in which arc is maintained under a blanket of
(d)

All of the above
Answer:

Option (c)

Showing 81 to 90 out of 137 Questions
6 7 8 9 10 11