What are cold air standard assumptions? These assumptions are: (1)The working fluid is air, which continuously circulates in a closed loop and always behaves as an ideal gas. (2)All the processes are internally reversible. (3)The combustion process is replaced by a heat addition process. (4)The exhaust process is replaced by a heat rejection process. What […]
What is lift and drag coefficient?
What is lift and drag coefficient? The lift to drag ratio (L/D) is the amount of lift generated by a wing or airfoil compared to its drag. The lift/drag ratio is used to express the relation between lift and drag and is determined by dividing the lift coefficient by the drag coefficient, CL/CD. Why does […]
Is a centrifugal pump self priming?
Is a centrifugal pump self priming? Most types of positive displacement pumps are self-priming but care must be taken to avoid overheating, seal wear or cavitation during the dry-running, priming phase. Centrifugal pumps can be modified to be self-priming with a surrounding ‘tank’ to retain some of the fluid. How is priming done in centrifugal […]
What is the F word in Pig Latin?
What was the significance of the assembly line in production in the 1920s?
What was the significance of the assembly line in production in the 1920s? In the 1920s, assembly line production and easy credit made it possible for ordinary Americans to purchase many new consumer goods. What was one result of the invention of the assembly line? As the assembly line spread through American industry, it brought […]
What is the purpose of the metering device?
What is the purpose of the metering device? The metering device is the component in an air conditioning system that drastically reduces the temperature and pressure of refrigerant coming from the condenser before that refrigerant enters the evaporator. What are the different types of metering devices? There are several metering devices in a typical system, […]
How do you calculate the specific impulse of a rocket?
How do you calculate the specific impulse of a rocket? Actual and effective exhaust velocity are the same in rocket engines operating in a vacuum. Specific impulse is inversely proportional to specific fuel consumption (SFC) by the relationship Isp = 1/(go·SFC) for SFC in kg/(N·s) and Isp = 3600/SFC for SFC in lb/(lbf·hr). How do […]
What is line balancing and cycle time?
What is line balancing and cycle time? Cycle time is one of the important data for the line balancing at any production line. The time required to finish one product, or the total time takes before the product leaves the workstation and move to the next workstation is called cycle time. MALBP-I: minimizes the number […]
What are the external factors of strategic planning?
What are the external factors of strategic planning? What are external factors? The economy, politics, competitors, customers, and even the weather are all uncontrollable factors that can influence an organization’s performance. This is in comparison to internal factors such as staff, company culture, processes, and finances, which all seem within your grasp. What are the […]
What did Einstein say about the universe?
What did Einstein say about the universe? He said it so himself numerous times. He found the Universe beautifully harmonious, and he believed that to be an expression of God. Did Einstein believe the universe was infinite? In contrast to this model, Albert Einstein proposed a temporally infinite but spatially finite model as his preferred […]