What is glass transition temperature of plastics? 170 K to 500 K. What happens at the glass transition temperature? There is a certain temperature(different for each polymer) called the glass transition temperature, or Tg for short. When the polymer is cooled below this temperature, it becomes hard and brittle, like glass. Some polymers are used […]
Why does plastic deformation occur?
Why does plastic deformation occur? Plastic deformation is the permanent distortion that occurs when a material is subjected to tensile, compressive, bending, or torsion stresses that exceed its yield strength and cause it to elongate, compress, buckle, bend, or twist. What are the different methods of increasing the strength of metals explain briefly? There are […]
What do we call architectural drawings that show the size of the building?
What do we call architectural drawings that show the size of the building? Foundation plan: A drawing that shows the layout and elevation of the building foundation. What are architectural drawings called? Prints of architectural drawings are still sometimes called blueprints, after one of the early processes which produced a white line on blue paper. […]
What is the difference between E400 and E450?
What is the difference between E400 and E450? The 2019 Mercedes-Benz E450 replaces the previous E400, and signals the addition of 33 horses and 15 lb-ft of torque to the twin-turbocharged 3.0-liter V-6’s engine, which now packs a total of 362 horsepower and 369 lb-ft of torque. All that oomph will be sent rearward on […]
What is reverted gear train?
What is reverted gear train? When the axes of the first gear (i.e. first driver) and the last gear (i.e. last driven or follower) are co-axial, then the gear train is known as reverted gear trainas shown in Fig. What is the purpose of having a gear train in a power transmission system? A transmission […]
What is the difference between a white and black rubber mallet?
What is the difference between a white and black rubber mallet? White mallets are less likely to leave marks than black mallets. Carpet layers, tile installers and others who work with materials with a surface that a black mallet might scuff use them. White mallets are somewhat more expensive than black and do not come […]
What is low pressure die casting?
What is low pressure die casting? Low-pressure die casting is a method of production that uses pressure – rather than gravity – to fill molds with molten metal such as aluminum and magnesium. In this process, the holding furnace is located below the cast and the liquid metal is forced upwards through a riser tube […]
How do you find the specific weight of mercury?
How do you find the specific weight of mercury? Mass is a property and the SI unit for density is [kg/m3]. The Imperial (U.S.) units for density are slugs/ft3 but pound-mass per cubic foot – lbm/ft3 – is often used….Specific Gravity for some common Materials. Substance Specific Gravity – SG – Mercury 13.59 Nickel 8.73 […]
What happens when a magnet is inserted into a coil of wire?
What is the purpose of hardness test?
What is the purpose of hardness test? The principal purpose of the hardness test is to determine the suitability of a material for a given application, or the particular treatment to which the material has been subjected. The ease with which the hardness test can be made has made it the most common method of […]