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Joining Questions Set 16:

Quiz Mode

How many flash removal systems are commonly used?

Solution:

What is the material of the electrodes used in spot welding?

Cu and W

Cu and Mg

Cu and Al

Solution:

What is the metal added to the joint during welding called?

Weld metal

Filler

Filler Metal

All of these

Solution:

What is the typical material used for the tips of electrodes in spot welding?

Brass

Copper

Stainless steel

Aluminum

Solution:

Which of the following factors does not affect weldability?

Melting point

Boiling point

Thermal conductivity

Thermal expansion

Solution:

The welding process that cannot be used for highly electrically conductive materials is

arc welding

gas welding

resistance welding

laser welding

Solution:

Spot welding of conductive metals like copper is

easier than ferrous metals

similar to other metals

conductivity is not relevant in spot welding

more difficult than ferrous metals

Solution:

Select the wrong statement about soldering:

The filler metal fills the joint by capillary action (as in brazing)

Temperatures in soldering are relatively low (unlike brazing)

Solders are not used for load-bearing structural members

After soldering, the flux residue should not be removed to avoid corrosion

Solution:

An electric-arc welding has the following voltage-current (V-I) characteristic: V = 9 + 7L, where L is the length of the arc in cm.
The power source characteristic is approximated by a straight line with an open-circuit voltage of 36 V and a short-circuit current of 600 A. Find the optimum arc length in mm.

18.65

8.09

25.43

12.85

Solution:

Which of the following holds true about direct drive friction welding?

Both the workpieces are restrained from motion

Among two workpieces, the one attached to motor-driven unit is restrained from motion

Among two workpieces, the one which is not attached to motor-driven unit is restrained from motion

Both the workpieces are moving relative to each other

Joining Questions Set 16:

How many flash removal systems are commonly used?

Solution:

What is the material of the electrodes used in spot welding?

Solution:

What is the metal added to the joint during welding called?

Solution:

What is the typical material used for the tips of electrodes in spot welding?

Solution:

Which of the following factors does not affect weldability?

Solution:

The welding process that cannot be used for highly electrically conductive materials is

Solution:

Spot welding of conductive metals like copper is

Solution:

Select the wrong statement about soldering:

Solution:

Solution:

Which of the following holds true about direct drive friction welding?

Solution:

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