How do you find the critical buckling load? The Euler column formula predicts the critical buckling load of a long column with pinned ends. The Euler formula is P cr = π 2 ⋅ E ⋅ I L 2 where E is the modulus of elasticity in (force/length2), I is the moment of inertia (length4), […]
What is calibration error?
What is calibration error? The difference between values indicated by an instrument and those that are actual. Normally, a correction card is placed next to the instrument indicating the instrument error. Also called calibration error. What are the four types of errors? Errors are normally classified in three categories: systematic errors, random errors, and blunders. […]
What is external forced convection how does it differ from internal forced convection can a heat transfer system involve both internal and external convection at the same time give an example?
What is external forced convection how does it differ from internal forced convection can a heat transfer system involve both internal and external convection at the same time give an example? If the fluid is forced to flow over a surface, it is called external forced convection. If it is forced to flow in a […]
How can you determine the specific heat of a metal using a calorimeter?
How can you determine the specific heat of a metal using a calorimeter? Place the metal piece into the water of the calorimeter and measure the highest temperature reached by the water. This is the final temperature of both the metal and the water. The energy change of water is calculated by rearranging the specific […]
When the angle between surface tension with the liquid θ is greater than 90 degree the liquid becomes?
When the angle between surface tension with the liquid θ is greater than 90 degree the liquid becomes? If θ is obtuse, i.e; θ >90°, then liquid meniscus will be convex upwards. If angle of contact is acute angle, i.e; θ <90°, then liquid will wet the surface. When there is a capillary depression What […]
What is the purpose of circuit analysis?
What is the purpose of circuit analysis? The general strategy of circuit analysis is to create and solve a system of independent equations. Written by Willy McAllister. Circuit analysis, or solving a circuit, means figuring out voltages and currents in each element. Which basic laws should be followed to Analyse the circuit? What is the […]
What is a one way flow control valve?
What is a one way flow control valve? Flow control or one-way flow control valves regulate the piston speed of pneumatic drives during advance and return strokes. This is done through suitable restriction of the flow rate of compressed air in exhaust air or supply air direction. The flow control function creates an adjustable annular […]
How does a cascade system work?
How does a cascade system work? Cascade Systems A cascade system uses one refrigerant to condense the other primary refrigerant that is operating at the desired evaporator temperature. This approach is usually used for temperature levels less than −80°F, when light hydrocarbon gases or other low boiling gases and vapors are being cooled. Why do […]
How do you reverse engineer a product?
How do you reverse engineer a product? THE REVERSE ENGINEERING PROCESS. To reverse engineer a physical product, an organization will typically acquire an example of the product in question and take it apart to examine its internal mechanisms. This way, engineers can unveil information about the original design and construction of the product. How is […]
What is disturbance control system?
What is disturbance control system? A disturbance signal is commonly found in control systems. Disturbance signals represent unwanted inputs which affect the control-system’s output, and result in an increase of the system error. What is tracking error control systems? A tracking control system is designed to have a low steady-state error in response to a […]