Indiana FFA Welding CDE Question Bank

The ability of a metal to be stretched without breaking.

The ability of a metal to be hammered or rolled into thin sheets without breaking.

The heat energy across an arc is primarily generated by the resistance to current flow across the arc.

A material that allows electricity to flow through it easily.

The two main methods for starting an arc are scratching and tapping.

Electrodes are classified by the American Welding Society.

Beveling is often used on thick metals to prepare the edges for welding.

Arc blow is caused by magnetic forces from the welding current.

The protective layer of material that forms around the solidifying weld to prevent contamination from the surrounding air.

A material used to prevent oxidation and impurities from affecting the weld.

The small weld that holds pieces of metal together before a full weld is applied.

The molten metal pool where the heat is concentrated during welding.

The added metal during welding that fills the joint and creates the weld.

The maximum amount of force the weld can handle before breaking.

An organization that sets standards and best practices for the welding industry.

A common name for arc welding that uses flux-coated electrodes.

Opening the acetylene cylinder valve more than a half turn can create a dangerous situation.

To remove gas from oxyacetylene equipment, a process known as bleeding the lines, is a necessary safety procedure.

The neutral flame is the optimal flame type for both heating and cutting with the oxyacetylene rig.

When using an oxyacetylene torch, safety glasses or goggles with a No. 5 shaded lens are recommended for eye protection.

The duty cycle refers to the percentage of time a welder can operate at full capacity before overheating.

Checking for gas leaks on an oxyacetylene rig can be done effectively by using soapy water.

A regulator on an oxyacetylene rig is a device responsible for controlling the flow of gas.

Acetylene is a highly flammable and explosive substance, making it a significant safety concern.

Stainless steels contain at least 12% chromium. This element forms a protective oxide layer on the surface, providing corrosion resistance.

The process where carbon is added to the surface of steel, forming a harder outer layer. This is commonly used to enhance durability and wear resistance.

The flux coating on SMAW electrodes serves multiple purposes: protecting the weld from atmospheric contamination, promoting a stable arc, and providing additional alloying elements.

The lead angle in welding refers to the angle between the electrode and the base metal when viewed from the end plane. It's crucial for proper weld penetration and deposition.

Undercutting, a common welding defect, can be minimized by reducing the welding current. This allows for a more controlled melt pool and reduces the risk of excessive erosion.

When using too low of an amperage during arc welding, the weld won't penetrate deeply enough, resulting in a weak and potentially incomplete joint.

Cast iron is known for its brittleness, making it prone to breaking under stress. This is due to its high carbon content and internal structure.

An AC welding machine operates at high voltage and requires a qualified electrician for servicing due to the potential hazards of high voltage.

A type of fire extinguisher used for fires involving electrical equipment, such as those found in a welding area.

A safety device used in welding to extinguish fires quickly by smothering the flames.

A method of starting an arc in stick welding by briefly touching the electrode to the metal and then quickly lifting it away.

A method of starting an arc in stick welding by dragging the electrode across the metal surface.

A single layer of filler metal deposited during the welding process.

The first layer of weld metal laid down in a joint, forming the base of the weld.

Another name for a 'T' weld, where two pieces of metal meet at a 90-degree angle.

The angle at which the electrode should be held during stick welding, typically 10 to 15 degrees from the vertical position.

The process of coating steel with a layer of zinc to protect it from rust and corrosion.

A type of steel that is highly resistant to corrosion due to its high chromium content.

Welding generates a high electric current to melt metal, but the voltage is relatively low.

A tool used to remove solidified slag from a weld after it cools down.

A protective helmet with a dark lens used to protect the welder's eyes from the intense light of the welding arc.

The temperature of the electric arc created during welding is extremely high, reaching approximately 9000 degrees Fahrenheit.

Welding tables should be made of metal for structural strength and to prevent heat damage.

Burning clothes on a person should be extinguished by using a fire blanket to smother the flames and prevent further burns.