What is cogeneration and what are its advantages? Cogeneration can significantly reduce carbon emissions and energy costs, as this EPA case study shows. And while typical combustion systems have an efficiency of about 40-50 percent, cogeneration systems that combine the power and heat generation processes can be up to 80 percent efficient. What are the […]
What is hoop stress in thick cylinder?
What is hoop stress in thick cylinder? In mechanics, a cylinder stress is a stress distribution with rotational symmetry; that is, which remains unchanged if the stressed object is rotated about some fixed axis. circumferential stress, or hoop stress, a normal stress in the tangential (azimuth) direction. Where does the maximum hoop stress in a […]
How do you find the pin out of a connector?
What steps do students participating in CPT need to take if they are changing employers?
What steps do students participating in CPT need to take if they are changing employers? What steps do students participation in CPT need to take if they are changing employers? Students must complete a new CPT application and wait for approval to start a new employment placement. Is it appropriate to send an email and […]
What are the air Properties indicated in a psychrometric chart?
What are the air Properties indicated in a psychrometric chart? Seven properties of atmospheric air are shown on the psychrometric chart. These properties are: dry bulb temperature, wet bulb temperature, dew point, humidity ratio, relative humidity, specific volume, and specific enthalpy. How is psychrometric chart calculated? the psychrometric chart: Locate the dry bulb tem- perature. […]
Is heat transfer reversible process?
Is heat transfer reversible process? In other words, the process of transfer of heat between two bodies which are isolated from the environment is irreversible. How do you know if a process is reversible or irreversible? Summary A reversible process is one in which both the system and its environment can return to exactly the […]
How are molds made for injection molding?
How are molds made for injection molding? Injection molds, which are usually made from steel, contain cavities that will form the parts. Melted plastic is injected into the mold, filling the cavities. The mold is cooled, and the parts are ejected by pins. This process is similar to a jello mold which is filled then […]
What type of simple machine is a screw?
What type of simple machine is a screw? A screw is a special kind of inclined plane. It’s basically an inclined plane wrapped around a pole. Screws can be used to lift things or to hold them together. Examples of the screw simple machine include swivel chairs, jar lids, and, of course, screws. Is a […]
Should blood flow be laminar or turbulent?
Should blood flow be laminar or turbulent? Generally in the body, blood flow is laminar. However, under conditions of high flow, particularly in the ascending aorta, laminar flow can be disrupted and become turbulent. When this occurs, blood does not flow linearly and smoothly in adjacent layers, but instead the flow can be described as […]
What are degreasers made of?
What are degreasers made of? One active ingredient in many degreasers, sodium carbonate (also known as soap ash), is used in powdered detergents as well as degreasers. Sodium carbonate works to break down grease and oil, and remove lubricants from materials and objects. What are degreasers used in cleaning? A degreaser is a cleaner designed […]