How do you calculate contact time disinfectant? Divide 1,500 gallons by the peak hourly flow of 15 gallons per minute to get 100 minutes of time available. Step 2: Your contact time is 100 minutes x 1.5 mg/l. This is equal to 150 min. mg/l of available contact time. How long does chlorine residual last? […]
How do you calculate the average molecular weight of a polymer?
How do you calculate the average molecular weight of a polymer? The distribution of molecular weights in a polymer sample is often described by the ratio of the weight average molecular weight to the number average molecular weight. In this case the ratio is 000 = 1.063. This ratio is the Polydispersity Index (or PDI)…. […]
What is a shot in injection molding?
What is a shot in injection molding? Two-Shot Molding Process The first is similar to traditional injection molding: A shot of resin is injected into a mold and cooled to form a solid part. What is the purpose of injection Moulding? Injection molding is a method to obtain molded products by injecting plastic materials molten […]
What are the Nate specialty test areas?
What are the Nate specialty test areas? There are currently 21 NATE installation, service, and senior tests. Specialties include: Air Conditioning, Air Distribution, Heat Pumps, Gas Furnaces, Oil Furnaces, Hydronics Gas, Hydronics Oil, Light Commercial Refrigeration, Commercial Refrigeration, and Senior HVAC Efficiency Analyst. How many Nate certifications are there? Technicians choosing to earn senior level […]
How much does manufacturing contribute to the US economy?
How much does manufacturing contribute to the US economy? Manufacturers in the United States account for 11.39% of the total output in the economy, employing 8.51% of the workforce. Total output from manufacturing was $2,334.60 billion in 2018. How does industry help the economy? Increased Employment Opportunities Industrialization provides increased employment opportunities in small- and […]
Who was the first man to make a light bulb?
Who was the first man to make a light bulb? Humphry Davy Who invented the lightbulb before Edison? Sir Humphrey Davy Is Thomas Edison’s first light bulb still burning? The Centennial Light is the world’s longest-lasting light bulb, burning since 1901, and almost never switched off. It is at 4550 East Avenue, Livermore, California, and […]
What are the different types of fabrication?
What are the different types of fabrication? What Is the Metal Fabrication Process? Cutting. Perhaps the most commonly used metal fabrication processes involve cutting, where sheets of metal are split into halves, thirds or smaller sections. Folding. Welding. Machining. Punching. Shearing. Stamping. Casting. What are the materials used in fabrication? Below is a list of […]
How do you display the contents of a file in Python?
What precautions should be taken when carrying a load?
What precautions should be taken when carrying a load? Safe lifting tips Healthy body Think before you lift. Plan the lift. Keep the load close to the waist. Adopt a stable position. Ensure a good hold on the load. Do not bend your back when lifting. Do not bend the back any further while lifting. […]
What are the stages in design process?
What are the stages in design process? Stages in the Design Process Analyze the situation. Before beginning the design, sort out what problem you are trying to address. Write a brief. Research the problem. Write a specification. Work out possible solutions. Select a preferred solution. Prepare working drawings and plan ahead. Construct a prototype. What […]