Which type of polymerization reaction occurs to form nylon 6 6? condensation reaction Why is nylon 6/6 a condensation polymer? To start off, nylon is made by a reaction which is a step-growth polymerization, and a condensation polymerization. Nylons are made from diacids and diamines. To make nylon 6,6 one doesn’t need a catalyst, but […]
What is the percentage of time a welding machine can be used continuously?
What is the percentage of time a welding machine can be used continuously? 60% Why is SMA welding current referred to as constant current? An arc is a very low impedance. In order to limit the power and stabilize the arc, it is important that the current be fairly constant. To accomplish this, a SMAW […]
Why is a turbofan more efficient than a turbojet?
Why is a turbofan more efficient than a turbojet? Low-bypass-ratio turbofans are more fuel efficient than the basic turbojet. A turbofan generates more thrust for nearly an equal amount of fuel used by the core because the fuel flow rate is changed by slightly when adding the fan. As a result, the turbofan offers high […]
What are 5 types of metals?
What are 5 types of metals? 5 Most Popular Types of Metals & Their Uses Steel. Steel is an iron alloy enriched with around 1% carbon and it is generally free of the impurities and residues that can otherwise be found in iron. Aluminum. Aluminum is a highly durable, light-weight and corrosion-resistant metal derived from […]
What is the main challenge for additive manufacturing?
What is the main challenge for additive manufacturing? Challenge #1: Size limitations The current inability to manufacture large and odd-sized parts is one of the biggest challenges of additive manufacturing within the aviation industry. What are the limitations of additive manufacturing? Additive Manufacturing Disadvantages It’s Almost Always Cost-Prohibitive. Just like metal injection molding (MIM), metal […]
What previous aerospace advances made the advancement achievement possible?
What previous aerospace advances made the advancement achievement possible? 10 Great Accomplishments in the History of Aviation The first internal combustion engine plane. The first manned flight. The first female pilot. The first commercial flight. The first flight around the world. The first solo non-stop flight. The first jet engine. The first female transatlantic solo […]
How spark ignition engine or gasoline engine differs from compression ignition engine or diesel engine?
How spark ignition engine or gasoline engine differs from compression ignition engine or diesel engine? Spark ignition gasoline and compression ignition diesel engines differ in how they supply and ignite the fuel. In a spark ignition engine, the fuel is mixed with air and then inducted into the cylinder during the intake process. After the […]
How many watts is a light bulb?
What is a Level 4 process?
What is a Level 4 process? Level four: is the documentation of systems, instructions and procedures required to complete steps in the level three processes and shows inputs, outputs, associated steps and decision points. The procedures and system instructions can be represented as text, an algorithm or detailed process map. What does ISO stand for […]
How can a force be resolved into its perpendicular components?
How can a force be resolved into its perpendicular components? In two dimensions, a force can be resolved into two mutually perpendicular components whose vector sum is equal to the given force. The components are often taken to be parallel to the x- and y-axes. Let F be a force, of magnitude F with components […]