300+ Joining Questions - Set 19 [With Solutions]

Joining Questions Set 19:

Quiz Mode

Laser Beam Welding (LBW) is a fusion welding process.

1

Arc

2

Fission

3

Fusion

4

Plastic

Solution:

Which gas is used to remove the oxygen layer formed on molten iron?

1

Hydrogen

2

Oxygen

3

Carbon dioxide

4

Chlorine

Solution:

What is the minimum power supply needed for the working of spot welding process?

1

10 kVA

2

22 kVA

3

14 kVA

4

6 kVA

Solution:

TIG welding is very suitable for welding of:

1

low gauge sheet metal

2

heavier gauges

3

high melting temperature alloys

4

all of them

Solution:

In high-pressure systems for storing gases, acetylene is stored in what form?

1

Gaseous form

2

Liquid form

3

Solid form

4

May be liquid or gas

Solution:

What is the primary connection method used in the spot welding process?

1

Mechanical pressure

2

Electric contact

3

Direct contact

4

Magnetic field

Solution:

Which current is preferred for welding of cast iron and non-ferrous metals?

1

low frequency AC current

2

high frequency AC current

3

DC current

4

all of the above

Solution:

How can arc blow be reduced?

1

Using alternating current instead of direct current

2

Reducing the amount of current and arc length

3

Placing more than one ground

4

All of the above

Solution:

Two 1 mm thick sheets are to be spot welded with a current of 5000 amps. Assuming the effective resistance is 200 micro-ohms and the current flow time is 0.2 seconds, the heat generated during the process will be:

1

0.2 Joule

2

1 Joule

3

5 Joules

4

1000 Joules

Solution:

In the forehand welding technique,

1

the movement of the welding torch is in the direction of the tip, which results in preheating of the workpieces.

2

the movement of the welding torch is in the opposite direction of the tip, which results in preheating of the workpieces.

3

the movement of the welding torch is in the direction of the tip, which does not result in preheating of the workpieces.

4

the movement of the welding torch is in the opposite direction of the tip, which does not result in preheating of the workpieces.

Solution:

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