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2. Which of the following possesses the least amount of crystallinity? As iron and nickel are both types of metals, it stands to reason that they would have a crystalline structure. On the other hand, high density polyethylene (HDPE) and low density ethylene (LDPE) are examples of different classes of polymers.
Which one of the following is an example of a structure that is not crystalline?
Glass can be described as either an amorphous or non-crystalline material. This is due to the fact that during the production of glass, the material that frequently contains silica is rapidly cooled from its liquid condition; yet, the material does not solidify even when the temperature drops below its melting point. As a consequence of this, glass can also be described as a liquid that has been “supercooled.”
Which one of the following has a crystal structure that is a HCP?
Zinc, Magnesium, and Cadmium are the three metals that can be found within an HCP crystal. Copper, silver, and gold are all used in the production of coins, and all three of these metals are included in the CCP. Because magnesium, or Mg, is the metal that possesses an HCP structure, option B is the one that should be chosen.
When it comes to the process of preparing a sample of material for testing, what is the first step involved?
Selecting. The selection of a representative test sample is a very crucial first step that must be taken in order to accurately characterize the microstructure or the features that are of interest. … Sectioning. In order to prevent the structure of the materials from becoming corrupted or altered in any way, test samples are meticulously sectioned.
Which one of the following is an example of a secondary bond network found in thermoplastics?
Which one of the following is an example of a secondary bond network found in thermoplastics? Explanation: Thermoplastics have a ‘2-degree’ secondary bond that is organized in a one-dimensional network.
Which of the following contains the least amount of crystals?respond while providing an explanation.
25 relevant questions found
Is nylon 6/6 a polymer that hardens when heated?
while nylon-6,6 is a kind of polyamide that is more usually referred to as fiber. The thermosetting polymer known as Novolac is a condensation polymer that is made from phenol and formaldehyde. Thermoplastic polymers such as neoprene include rubber. while nylon-6,6 is a kind of polyamide that is more usually referred to as fiber.
Which of the Polymer Groups is the most Powerful?
The thermoplasts belong to the group of polymers that is, in general, the strongest.
What are the goals of non-destructive testing (NDT)?
The objective of non-destructive testing, often known as NDT, is to check a component in a manner that is risk-free, dependable, and economical, all without putting the machinery or plant operations at risk. This is in contrast to destructive testing, which involves causing the component that is being tested to become damaged or destroyed while it is being inspected.
Which of the following tests is considered to be non-destructive?
Which one of the following does not not belong to the category of non-destructive testing? Explanation: One form of destructive testing is called the compression test. The behavior of metals under a compressive load can be determined with the help of this test. There are a few different kinds of non-destructive testing, including visual testing, ultrasonic testing, and eddy current testing.
Which order should be followed for LPI?
LPI can be applied to shapes that are either basic or complicated, regardless of their size. 3. For the liquid penetrant test, which of the following is the correct order? Explanation: The first step is to clean the surface.
How many different kinds of crystal formations may there be?
In total, there are seven different crystal systems, which are referred to as triclinic, monoclinic, orthorhombic, tetragonal, trigonal, and hexagonal, respectively. Cubic crystals are the most common. Lattices and point groups are what determine the members of a crystal family.
What is the crystal structure of sodium chloride?
NaCl has a cubic unit cell. An array of face-centered cubic anions with an interpenetrating face-centered cubic cation lattice is the most useful way to think about it. The appearance of the cell is unaffected regardless of whether you begin with anions or cations on the corners. Each ion has six coordinates and a local geometry that is octahedral in nature.
What exactly is an imperfect line?
Dislocations are another name for line flaws, which are also known as one-dimensional defects. Dislocations are sudden shifts in the regular arrangement of atoms within a solid that occur along a line known as a dislocation line. They occur in very high densities and have a significant impact on the material’s kinematic and mechanistic properties.
What sets crystalline and non-crystalline structures apart from one another?
In a solid that is crystalline, all of the atoms are ordered in a way that is periodic in all three dimensions, whereas in a solid that is not crystalline, the arrangement of the atoms is random or otherwise not periodic in nature. Crystalline solids can either be single crystalline or polycrystalline depending on the nature of the crystals.
What kinds of characteristics do crystalline substances possess?
Crystalline substances have edges and faces that are clearly defined, they scatter x-rays, and their melting points are typically rather high. Amorphous solids, on the other hand, can have surfaces that are curved or uneven, they do not produce well-resolved x-ray diffraction patterns, and they can melt at temperatures that span a wide range.
The crystalline structure exhibits which of the following characteristics?
Crystalline structure is characterized by which of the following qualities? Explanation: When compared to its non-crystalline form, a material with a crystalline structure has a higher density because the atoms that make up the substance are packed together more closely than in the non-crystalline form.
Which method of NDT is the most effective?
Phased array ultrasonic testing is the nondestructive testing method that is the most efficient and successful in detecting failure-predictive faults in welds. Other nondestructive testing methods can detect these problems as well.
Where may one make use of NDT?
NDT is utilized extensively in a variety of day-to-day objects, including oil rigs and pipelines, bridges and railway lines, aircrafts and trains, and high-speed theme park attractions, among other examples of things that require routine inspection and repair. In addition to the requirement for safety, non-destructive testing (NDT) is utilized to guarantee the effectiveness and longevity of the equipment.
Which six types of nondestructive testing are the most common?
Eddy-current testing, magnetic-particle testing, liquid penetrant testing, radiographic testing, ultrasonic testing, and visual testing are the six non-destructive testing methods that are utilized the most commonly.
What is the key distinction between an NDE and an NDT?
Since NDT is limited to testing, NDE encompasses not only testing but also the evaluation of the findings of the testing. That is, non-destructive testing (NDT) is used to identify flaws in an asset, while non-destructive evaluation (NDE) is used to identify flaws while also measuring the size, shape, orientation, and other physical features of the defect.
Which five major NDT methods are there to choose from?
- Visual Testing (VT) …
- Ultrasonic Testing (UT) …
- Radiography Testing (RT) …
- Eddy Current (Electromagnetic) Testing (ET) …
- Magnetic Particle Testing (MT) …
- Acoustic Emission Testing (AE) …
- Liquid Penetrant testing (PT) …
- Leak Testing (LT)
What are the benefits of utilizing NDT?
- Less Waste. Because NDT does not change the properties of substances, we can keep making use of them. …
- Less Downtime. …
- Accident Prevention. …
- Determine Problem Areas Ahead of Time to Avoid Failure…. Thorough Testing….
- Improved Dependability of the Product.
Is it a naturally occurring polymer?
Natural polymers are found in the wild and can be harvested from there. They frequently consist of a water-based medium. Silk, wool, DNA, cellulose, and proteins are all examples of naturally occurring polymers… Pectin is an example of a natural polymer, whereas vulcanized rubber is an example of a synthetic (man-made) polymer. [Citation needed]
Are polymers brittle in nature?
Polymers are materials that are made up of lengthy chains of molecules that repeat themselves… Certain polymers flex and stretch, like rubber and polyester. Epoxies and glass are two examples of materials that fall into this category. Polymers are involved in practically every sphere of contemporary life.
What is it that sets polymer materials apart from other materials?
Different engineering polymers each have their own unique set of beneficial properties, some of which include a high strength or modulus to weight ratio (light weight but relatively stiff and strong), toughness, resilience, resistance to corrosion, lack of conductivity (both heat and electrical), color, transparency, ease of processing, and a low cost.