Category: Engineering

What does a tensile test determine? A tensile test applies tensile (pulling) force to a material and measures the specimen’s response to the stress. By doing this, tensile tests determine how strong a material is and how much it can elongate. What is the relationship between tensile strength and elongation? The force at material rupture […]

What is the use of reheat cycle in steam turbine? The purpose of a reheating cycle is to remove the moisture carried by the steam at the final stages of the expansion process. In this variation, two turbines work in series. Why Carnot cycle is practically not possible? This means that the Carnot cycle is […]

How do you calculate heat load of shell and tube heat exchanger? The main basic Heat Exchanger equation is: Q = U x A x ΔTm = The log mean temperature difference ΔTm is: ΔTm = (T1 – t2) – (T2 – t1) = °F. Where: T1 = Inlet tube side fluid temperature; t2 = […]

How do you control the speed of a linear actuator? A simple way to lower the speed of a linear actuator is to reduce the voltage at which you drive it. The speed of Actuonix actuators is approximately proportional to voltage. This means that if you were to drive one of our 12V actuators at […]

What are the types of valves? Common types of valves include: Ball Valve. Predominantly equipped with quick-acting 90-degree turn handles, these valves use a ball to control flow to provide easy on-off control. Butterfly Valve. Check Valve. Gate Valve. Knife Gate Valve. Globe Valve. Needle Valve. Pinch Valve. What are the three types of valve […]

What are the 3 types of tolerances? A tolerance is an acceptable amount of dimensional variation that will still allow an object to function correctly. Three basic tolerances that occur most often on working drawings are: limit dimensions, unilateral, and bilateral tolerances. What is definition of tolerance? 1 : capacity to endure pain or hardship […]

How do you ask someone for help? (To) give (someone) a hand / (To) lend (someone) a hand. This is another really common way to ask for help in English. To help someone out. Help me out, help you out, help them out. (To) help out. It can be with assistance or it can be […]

What is the formula for calculating principal payment? What Is Your Principal Payment? The principal is the amount of money you borrow when you originally take out your home loan. To calculate your principal, simply subtract your down payment from your home’s final selling price. For example, let’s say that you buy a home for […]

How are conductor sizes expressed? Conductor sizes are expressed in American Wire Gage (AWG) or in circular mils. Conductor sizes found in Chapter 9, Table 8 of the National Electrical Code® start with 18 AWG (the smallest size) and end up at 2000 circular mils (the largest size). How is wire diameter expressed in the […]

How does fouling factor affect heat transfer? The deposition of any undesired material on heat transfer surfaces is called fouling. Fouling increases the overall thermal resistance and lowers the overall heat transfer coefficient of heat exchangers. Fouling also impedes fluid flow, accelerates corrosion and increases pressure drop across heat exchangers. What are the common causes […]