How much lift will a symmetrical airfoil produce at zero angle of attack? A symmetrical wing has zero lift at 0 degrees angle of attack. The lift curve is also influenced by the wing shape, including its airfoil section and wing planform. A swept wing has a lower, flatter curve with a higher critical angle. […]
Why counter flow heat exchanger is more efficient?
Why counter flow heat exchanger is more efficient? Counter flow heat exchangers are inherently more efficient than parallel flow heat exchangers because they create a more uniform temperature difference between the fluids, over the entire length of the fluid path. For example, one fluid may make 2 passes, the other 4 passes. How does a […]
What is the divide and conquer approach to problem solving?
What is the divide and conquer approach to problem solving? A divide-and-conquer algorithm recursively breaks down a problem into two or more sub-problems of the same or related type, until these become simple enough to be solved directly. The solutions to the sub-problems are then combined to give a solution to the original problem. How […]
What can affect gas mileage?
What can affect gas mileage? How Your Driving Affects Fuel Economy Excessive Short Trips. Your engine works at its most efficient after it warms up. Frequent Cold Weather Travel. Heavy Braking or Acceleration. High Vehicle Weight or Towing Weight. Speeding. Fuel Injector Problems. Oil Type. Poor Maintenance. Why does gas mileage drop with new tires? […]
How is ethylene oxide formed?
How is ethylene oxide formed? Ethylene oxide can be produced by reacting oxygen (O2) and ethylene (C2H4) at temperatures of 200 – 300°C and pressures of 10 – 20 bara. The typical yield of this reaction is up to 80 – 90%. Is Ethylene Oxide an oxidizer? Historically, the most commonly used type of equipment […]
Why is measurement important in welding?
Why is measurement important in welding? Several welding projects require you to understand, calculate and measure welds at different angles accurately. Moderate knowledge of geometrical measurements will make it easier for you to connect metals together while advanced knowledge will make it possible to work on complex projects. Which of the following is the most […]
How does the TCP sender understand whether there is congestion in the network?
How does the TCP sender understand whether there is congestion in the network? TCP detects congestion when it fails to receive an acknowledgement for a packet within the estimated timeout. Both these algorithms depend on counting duplicate acknowledgements sent by the data receiver in response to each additional segment received following some missing data. Does […]
What are the three 3 types of heat transfer mechanisms?
What are the three 3 types of heat transfer mechanisms? The Three Mechanisms of Heat Transfer: Conduction, Convection, and Radiation. Is a sun conduction convection or radiation? Convection is the transfer of heat energy in a fluid. Air in the atmosphere acts as a fluid. The sun’s radiation strikes the ground, thus warming the rocks. […]
What is clarification in water treatment?
What is clarification in water treatment? Clarification is an essential step in a water or wastewater treatment process to remove suspended solids through gravity settling, providing a clarified liquid effluent. A secondary function of a clarifier is the removal of floating matter (scum), which has accumulated on the water surface. What is the first step […]
What is profile tolerance?
What is profile tolerance? In GD, profile tolerance defines a uniform boundary around a surface within which the elements of the surface must lie. Profile is a complex tolerance that simultaneously controls a feature’s form, size, orientation, and sometimes location. The top figure shows the profile tolerance applied to a curved surface. How many types […]