Manufacturing Technology (3151912) MCQs

MCQs of Metal Joining Processes

Showing 21 to 30 out of 137 Questions
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21.

The following flux is used for brazing brass, copper, bronze, and low carbon-steels

(a)

Mixture of boric acid, borax and a wetting agent
(b)

Boric acid, borax or fluoride with a wetting agent
(c)

Chlorides and fluorides mixed with, water
(d)

All of the above
Answer:

Option (a)

22.

Solder is essentially a

(a)

Tin-silver base
(b)

Tin lead base
(c)

Tin-bismuth base
(d)

Tin-bismuth base
Answer:

Option (b)

23.

A soldering iron 'bit' is made of

(a)

Brass
(b)

Tin
(c)

Steel
(d)

Copper
Answer:

Option (d)

24.

Binding wire used to support the joints for soldering is made of

(a)

Aluminium
(b)

Copper
(c)

Soft iron
(d)

Mild steel
Answer:

Option (c)

25.

The purpose of using flux in soldering is to

(a)

Increase fluidity of solder metal
(b)

Fill up gaps left in a bad joint
(c)

Prevent oxides forming
(d)

Prevent oxides forming
Answer:

Option (c)

26.

Soldering iron is made of wedge shape in order to

(a)

Apply high pressure at edge
(b)

Retain heat
(c)

Retain solder
(d)

Facilitate molecular attraction
Answer:

Option (b)

27.

The temperature range for soldering process is

(a)

40°C to 100°C
(b)

180°C to 250°C
(c)

300°C to 500°C
(d)

600°C to 900°C
Answer:

Option (b)

28.

The oxy-acetylene gas used in gas welding produce a flame temperature of

(a)

1800°C
(b)

2100°C
(c)

2400°C
(d)

3200°C
Answer:

Option (d)

29.

For gas welding, the presure desired at the welding torch for acetylene 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
Answer:

Option (a)

30.

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
Answer:

Option (b)

Showing 21 to 30 out of 137 Questions
1 2 3 4 5 6