Enthalpy Vs Entropy | Difference | Comparison

Enthalpy and entropy are two thermodynamic properties related to the amount of energy a system contains. Enthalpy is a measure of the total energy content of a system, including the energy that is available for doing work. Entropy is a measurement of a system's total energy content. These two terms are related since an increase in entropy typically results in a decrease in enthalpy. In this section, we will look at the main differences between enthalpy and entropy in a systematic way. You can check the detailed information on enthalpy vs entropy here in this article. 

Enthalpy Vs Entropy | Difference between enthalpy and entropy

• Enthalpy is an energy whereas entropy is an attribute. 
• Enthalpy is directly related to the internal energy of the system. Entropy is a measurement of molecular randomness. 
• The total sum of energies inside the system is called enthalpy. As the temperature rises, entropy increases.
• Enthalpy is denoted as H while entropy is denoted as S. 
• The unit of enthalpy is KJ/mol. The unit for entropy is J/K.
• Enthalpy was termed by a scientist named Heike Kamerlingh Onnes. Entropy was termed by a scientist named Rudolf Clausius. 
• Enthalpy is positive for endothermic processes and entropy is positive for spontaneous processes. 
• Enthalpy is negative for exothermic processes and entropy is negative for non-spontaneous processes. 
• The system favours minimum enthalpy whereas the system favours maximum entropy. 
• The first law of thermodynamics is related to enthalpy. The second law of thermodynamics is related to entropy.
• Enthalpy is applicable to related standard conditions. Entropy does not have any limits or conditions. 

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1. Difference between Enthalpy and Internal energy

Difference between enthalpy and internal energy

Enthalpy and internal energy are both used in thermodynamics to describe the energy of a system. Enthalpy is a measure of the total energy of a system, whereas internal energy is a measure of the energy within a system. Enthalpy includes both the internal energy of the system, as well as the work done by the system on its surroundings. Internal energy is the sum of the kinetic and potential energies of the molecules in a system. To learn more about both terms, let us dive deep into the difference between enthalpy and internal energy. 

Difference between enthalpy and internal energy

Definition: 

Enthalpy is the heat energy that is absorbed or evolved during the progression of a chemical reaction. 

The internal energy is the sum of that system's potential and kinetic energy. 

Symbol:

Enthalpy is represented by H and internal energy is represented by U. 

Equation: 

Enthalpy is calculated by H = U + PV

Internal energy is calculated by U = q - w

System: 

Enthalpy is defined as the relationship between the system and its surrounding. Thus, enthalpy is used for open systems. 

Internal energy is defined as the total energy in a system. Thus, the internal energy is used for closed systems. 

Principle: 

The endothermic process has positive H and the exothermic process has negative H. 

Internal energy increases when the system absorbs energy and decreases when the system releases energy to the surrounding. 

Unit:

The unit for enthalpy is Joule/mole whereas the unit for internal energy is Joule. 

Dependence: 

Enthalpy is a function of temperature and pressure and internal energy is a function of temperature only.

Ideal gas:

The Enthalpy of an ideal gas is 40% more than internal energy. 

The internal energy of the ideal gas is 40% less than enthalpy. 

Example: 

Enthalpy can be applied to refrigerators for freezing and boiler for boiling. 

A glass of water has no apparent energy, but it does have internal energy. 

 

Conclusion: 

Enthalpy is associated with systems in contact with their surroundings, whereas internal energy is the overall energy of a specific system. However, changes in enthalpy and internal energy are critical in understanding the kind and nature of chemical processes in a system. As a result, it is essential to grasp the distinction between enthalpy and internal energy.

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1. Enthalpy Vs Entropy

Turbocharger Vs Supercharger | Difference

Turbochargers and superchargers are forced induction devices to boost the engine's power output. Both systems employ air compression to increase the volume of air entering the engine, allowing more fuel to be burned and more power to be generated. However, a few key differences place them on opposing extremes of the automotive spectrum. Let us check out the turbocharger vs supercharger in detailed information explained here.  

The main difference between turbochargers and superchargers

The main difference between turbochargers and superchargers is how they compress air. A turbocharger uses engine exhaust gases to power a turbine, compressing and driving air into the engine. A supercharger is driven by the engine and uses a belt-drive or gear-drive system to compress air.

Turbochargers are more efficient than superchargers in terms of performance since they work at lower RPMs and may create more power. On the other hand, superchargers provide more power at lower RPMs, making them suitable for drag racing and other short-burst applications.

Read more about the advantages and disadvantages of supercharger

Turbocharger Vs Supercharger

• Superchargers produce significantly more horsepower than turbochargers. 
• Turbochargers are ideal for smaller displacement engines with four-cylinder applications, whereas superchargers boost power in larger displacement engines with more cylinders. 
• Supercharger experiences longer life and less heat wear than a turbocharger. 
• Turbocharged engines require higher engine oil than supercharged engines due to extremely hot operating temperatures. 
• Supercharged engine power delivery is more instantaneous than a turbocharged engine because no power lag was seen with turbocharging. 
• The supercharged engine has lower fuel economy than the turbocharged engine. 
• Supercharger engines are louder and more abrasive sounding than turbochargers. 

Read more about the advantages of turbochargers

Which one do you prefer Turbocharger or Supercharger?

Turbochargers make more sense since they boost engine efficiency in various ways. Even if they can provide an effective boost at low RPM, superchargers place additional strain on the engine. However, if you can not decide, you can utilize both concurrently, known as twin-charging.

Read more about the disadvantages of turbochargers

Where will things head in future?

Electric turbos, in which an electric motor spools up the turbo at low RPMs, creating an effective boost until the exhaust gases are sufficient to power the turbo, are projected to become increasingly popular in future automobiles. This is exactly what the ERS system is doing in Formula One, and it is the solution to the turbocharger's worst problem turbo lag.

Fuel injection vs Carburetor | Difference

There are two different methods of delivering fuel to an engine. One is a fuel injection, and another is a carburetion. Both methods can be used to power an engine, but fuel injection is the most popular choice for many reasons. The carburetor mixes the fuel and air before it enters the engine. This can be done by venturi, which narrows the airflow and injects fuel into the air stream. The mixture is then drawn into the engine and then burned.

In contrast, fuel injection injects the fuel directly into the intake manifold or cylinder. In the cylinder, fuel is combined with air and drawn into the engine. Thus, it enables more accurate control of air/fuel ratio, which leads to enhanced fuel efficiency, improved power, and lower emissions. Fuel injection is much less maintenance than a carburetor, making it the preferred choice in modern engines. So, how do these two systems work? What distinguishes them, and what are their respective qualities and vices? Let us check the fuel injection vs carburetor difference.

Read more about advantages and disadvantages of carburetor

Difference between fuel injection vs carburetor

Versatility

The carburetor has been phased out of the automobile industry, with fuel injection taking place and gaining dominance. For starters, it can not be used in diesel automobiles. Fuel injection is available in both electrical and mechanical forms. Thus, it can be used for both diesel and petrol vehicles.  

Performance

A fuel injection system with electronically controlled fuel induction can continually adjust the fuel flow to the cylinders, resulting in improved performance. A carburetor suffers from shifting air pressure and fuel temperature and cannot measure the correct air-fuel ratio. 

Fuel Economy

A fuel injection system accurately delivers fuel in the right of fuel and may be tweaked based on numerous characteristics, resulting in less fuel waste and improved fuel economy. A carburetor can not adjust the fuel ratio based on engine circumstances. 

Maintenance

The only parameter where a carburetor outperforms fuel injection. Carburetors are simple to clean and rebuild. Repairing a fuel injection system requires skilled professional assistance or a costly replacement. 

Read more about advantages and disadvantages of fuel injection

Frequently Asked Questions: Fuel injection and Carburetor

1. Carburetor or fuel injection: Which is better?

The answer is that it truly depends on how much you drive your car and how much money you want to spend into it. Car manufacturers stopped carburetors in the 1980s due to advances in fuel injection technology. However, it is also more costly.

2. Does fuel injection more reliable than carburetor?

A good fuel injection system is often more accurate than a carburetor. This technology delivers the exact quantity of fuel required, regardless of the conditions, resulting in improved reliability and fuel economy. Because a carburetor cannot compensate for the fuel intake ratio, it needs to be more precise.

3. Why carburetors are not used anymore?

Because fuel injection technology has much more evolved thus, the usage of carburetors has decreased significantly.

Fire tube boiler vs Water tube boiler | Difference

The main difference between a fire tube and a water tube boiler is in a water tube boiler, the water flows through the tubes, and the heat source surrounds them, while in a fire tube boiler, the heat source is in the centre, and water flows around the tube. At the same time, both have advantages or drawbacks at efficiency-specific points. Water tubes are far more efficient than fire tube boilers. Let's get into the difference between a fire tube and a water tube boiler and the pros and cons of each. 

Fire tube boiler vs Water tube boiler

• The heating element produces hot water through a more indirect mechanism in a fire tube boiler. The heating element acts directly on tubes filled with water, which run through the furnace casing, to produce the needed steam or super-hot water in a water tube boiler. 
• Fire tube boilers are best suited for single-building applications, whereas water tube boilers are best suited for industrial process applications. 
• Fire tube boilers are less expensive than water tube boilers. 
• Fire tube boilers are easier to clean and repair than water tube boilers because maintenance can be performed outside the unit rather than inside.
• Water tube boilers can have a higher capacity and can handle pressure up to 5000 psig and very high temperatures. The fire tube boilers have a smaller capacity and can not handle high pressures over 250 psig. 

A key difference between fire tube and water tube boiler

• Fire tube boiler construction is compact as compared with water tube boiler. 
• The water tube boiler has higher temperature output than the fire tube boiler. 
• Fire tube boilers are more efficient and have straight tube designs than water tube boilers. 
• Water tube boiler has fast heat recovery than fire tube boiler. 
• Water tube boilers have precise load fluctuation handling and fire tube boiler has good load surge handling. 
• Fire tube boiler is simple to the operation than water tube boiler. 
• The water tube boiler has better turn down than the fire tube boiler. 

Bolt Vs Screw | Difference | Comparison

For some projects, both screws and bolts are required. Even though they are comparable to one another, there are still situations where a bolt or screw would be preferable. Keep reading if you are unsure if the work at hand calls for bolts or a screw. We have all the information you could possibly need and more to help you choose which one to use and when. So here, In this article, you can check out the Bolt Vs Screw to better understand this topic.

What is Bolt?

A bolt is a type of fastener with threads and a head that is used in conjunction with nuts to be inserted. Bolts aren't designed to hold themselves into a material, instead, they rely on the nut to supply the necessary holding strain. To be secured, a bolt must protrude from the opposite side of the material. Screws are less frequently used with washers than bolts. 

What Screw?

A screw is a type of mechanical fastener used to attach pieces with threads that has a cylindrical or tapered shaft with threads. Self-threading screws have threads that cut into the material as the screw is rotated. These screws have tapered shafts. Screws have a threaded shaft throughout. The force that maintains the components firmly connected is the friction at the threads. For machine screws, this friction is caused by the applied torque, whereas for self-tapping screws, the radial expansion of the hole is mostly responsible. 

Bolt Vs Screw | Difference between Bolt and Screw:

• Both bolts and screws can have tapered shafts, although bolts often have partially threaded, uniform cross sections. Therefore, the cross-section may change depending on how long the screw is. Additionally, the full length of screws is threaded.
• Every time a bolt is used, A nut is also used. Screws are always utilized on their own.
• Bolt is always used in pain like nut and bolt. Screws are always used by themselves. 
• Bolt is used with unthreaded components. The screw can be used with threaded or un-threaded components.
• In the bolt cross uniform section. In screw can have a non-uniform cross-section.
• Bolts are reliable, Screw is less reliable.
• Bolts are larger in size. Screws are smaller than bolts.
• The threads are spiral in shape, while in a screw, threads are helical in shape.
• Bolts don't have a tapered shank. While the screw has a tapered or pointed shank.
• Bolts are always fixed at a single position with the use of a tool. The screw has to be turned every time it has to be assembled.
• These bolts mostly require wrenches and spanners for tightening and loosening purposes. Mostly screwdrivers are needed to tighten and loosen screws.
• Bolt is often used in the making of bolted joints. While screw can't be involved in the bolted jointed making due to the presence of at least one thread. 
• A bolt is tightened by rotating the tool clockwise and is usually used for joining materials that do not have existing holes in them. A screw is an externally threaded faster capable of being inserted into holes in assembled parts, mating with a preformed internal thread or forming its own thread, and of being tightened or released by torquing the head. 
• Larger-size bolts are used to achieve higher load-carrying capacity. Screws are not available in a very larger size. They are generally used for low-load carrying applications. 
• Bolt are apply compression on the parts that they join. While screws don't apply compression on the parts that they join.
• The example of bolts are anchor bol, t head bolt, toggle bolt, u bolt, j-bolt, eyebolts, hexagon bolt/tap bolt, machine bolt, carriage bolt, elevator bolt, flange bolt, hanger bolt, plow blot, lag bolt, sex bolt, shoulder bolt, square head bolt, stud bolt, plow bolt, timber bolt, etc. While the example of screws is seld drilling, socket screw, eye lag, mating screw, thread screw, machine screw, sheet metal screw, wood screw, eye large, socket screw, set screw, etc. 

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Pros and Cons of Stainless Steel

Review this list of the benefits and drawbacks of stainless steel appliances before making the important decision about which appliances to buy.   So here, In this article, you can check out the Pros and cons of stainless steel to better understand this topic.

Pros of Stainless steel:

• Because stainless steel cookware is not porous, it is simple to clean. Because it does not retain food. Filth may simply be removed with a sponge or towel.
• Stainless steel cookware can be used to prepare practically any cuisine, even deep-fried dishes. Even an induction stovetop can use it.
• The sleek, contemporary, and clean appearance that stainless steel appliances give any kitchen is one of the main reasons people purchase them. Due to its neutral tint, stainless steel doesn't with the other hues or patterns you have employed to decorate your kitchen.
• The use of stainless steel is ideal for many different sorts of cooking situations since it is a very strong material that can sustain high temperatures without wrapping or melting.
• Teflon is frequently used to create a nonstick surface for cookware. Teflon components, knowns as PFAS, can flake off and become hazardous when heated to a high temperature. 
• You could feel like your mission to avoid stains is never ending if you have children or pets. The fact that stainless steel appliances resist stains, as their name implies, is one of their best and most amazing features.

Cons of Stainless steel:

• An investment is a stainless steel. Although you should prepare to pay more for stainless steel appliances, its greater durability and damage resistance compared to conventional appliances serves as a compensating feature. A long-term return may be obtained from this investment.
• Stainless steel appliances may also be more stain resistant than smudge-resistant, which could be a drawback. That makes them susceptible to smudges and fingerprints, which can be a major worry if you have young children or animals. 
•  Sometimes it can be challenging to get rid of these stains. Employing a polishing and also guarding them stainless steel treatment will leave your appliances appearing spotless and brand new while also guarding them against further water spotting and discoloration. 
• Choose a product that will help you appreciate your stainless steel appliances by keeping them clean and hygienic in order to avoid the daily annoyances of stainless steel such as lint, figure print, and smudges.
• You probably have a collection of magnets you use to hold things in place if you use your refrigerator to exhibit your children's artwork and post family reminders. Appliances made of stainless steel are not always magnetic.

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Nuts Vs Bolts | Difference | Comparison

To secure a stack of components together, bolts and nuts are almost, always used in tandem. A bolt is essentially a screw, but a nut is a little metallic thing.  So here, In this article, you can check out the Nuts Vs Bolts to better understand this topic.

What is Bolt?

The cylindrical stem of bolts, which are made of metal, features groove incisions that resemble the grooves on the interior of nuts. A head is there in addition to this threaded stem, and it aids in holding the components together. 

What are Nuts?

A nut is a little metallic object with a hole in the center that has a groove in it. The term threads refer to these grooved opening. Nuts are employed as fastening devices. Though utilized as fastening tools. Nuts must be used in conjunction with bolts in order to function. 

Nuts Vs Bolts | Difference between Nuts and Bolts:

• The main difference between nuts and bolts is that bolts have a threaded stem that inserts into the bolt. Nuts are little metallic items with a threaded hole in the middle for a nut to fit into.
• Typically, zinc-coated carbon steel is used to make nuts. Bolts are often produced from high-grade steel that contains significant concentrations of nickel and chromium.
• Bolt encounters tensile forces, A nut only experiences compressive forces.
• Excessive compressive stress can cause a nut to break, but excessive tensile stress can cause a bolt to break.
• Both have heads, but nuts do not, making attaching easier. 

Riveting Vs Bolting | Difference | Comparison

Bolt is transient or short-term connectors in contrast to rivets which are more permanent. Rivets on the other hand are secure coupling that is inserted into the hole. To join any metals or machinery, both are necessary components. Bolt's primary use is to securely fasten any object. Its diameter and length are both appropriate. Antoine Duchenne made the discovery of the rivets that were utilized in the first machines in 1869. So here, In this article, you can check out the Riveting Vs Bolting to better understand this topic.

What is Riveting?

A permanent class of cylindrically shaped mechanical tools is known as a rivet. Machines are where rivets were originally used. By Antoine Duchenne in 1836, it was found. It has the appropriate breadth and length. The rivet's head, which is rounded on top, and the rivet pin and end make up the remaining components. 

What is Bolt?

In order to connect any type of machine, a metal bar called a bolt is used. The joints need to be combined. It comes in many different patterns. It looks like a screw. The body, head, nuts, washer, and threads of a bolt are all present. Due to the alloy steel used in its construction, galvanization. Bolt is mostly employed in machine construction and design. 

Riveting Vs Bolting | Difference between Riveting and Bolting:

• The rivet does not contain any threads. Bolts include external threads.
• The rivers can be taken out by drilling or cutting. Bolts can be easily attached and removed.
• The nuts are absent in the reverts.  While the bolts have the presence of nuts.
• The rivets are recognized as an incurable process. Bolts are understood to be a changing process.
• Rivets are a type of permanent joint. A bolt is a kind of temporary joint. 

Conclusions:

A connecting medium is made up of bolts and rivets. Many machines are created with the use of bolts and rivets. Bolts come in a variety of grads, but the ones that are used the most effectively are 5.8, 8.4, 10.9, and 12.9. To hold bolts, nuts are required.

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1.  Welding Vs Brazing

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Welding Vs Brazing | Difference | Comparison

Welding and Brazing are two main techniques used to make strong, long-lasting metal joints. There are a number of ways to link metal pieces together, such as adhesive bonding and mechanical fasteners, but there are usually just two possibilities. If you want to make strong, long-lasting metal joints: do welding or brazing. So here, In this article, you can check out the  Welding Vs Branzing to better understand this topic.

What is Welding?

Using high heat, high pressure, or both two or more metal components are joined during the welding process. As they tool, the joining components melt and fuse together. Although it can be used on wood, welding is most frequently employed to affix metal thermoplastics together. Filler metal is an additional piece of metal used during the welding process to fill in or seal any potential gaps is also employed. 

What is Brazing?

In order to form a bond between the two joining metals, brazing entails melting a filler metal into a joint. For the filler metal to be introduced into the joint in a capillary action during brazing, a short joint spacing is necessary. An appropriate phase temperature of 840 degrees F or higher is necessary to assemble the pieces. 

Welding Vs Branzing | Difference between Welding and Brazing:

• Welding is the jointing process in which both pieces of workpiece melted together with or without the application of filter materials. Brazing is the joining process in which a workpiece is heated below its melting temperature and the joint is made by use of a filter material known as brazing. 
• The temperature of welding is above the melting point of the workpiece. It is almost 3600 degrees C. Brazing is done much below the melting temperature which is almost 600 degrees C.
• The use of filler metal is not compulsory in welding. Filler metal is used compulsorily in brazing.
• The workpiece must be clean before welding. The workpiece should be clean but it is not compulsory in brazing.
• Welding is the form of the strongest joint. Brazing joints are weaker than welding.
• Welding is properties of base metal may change after joining. Brazing is the properties of base metals that remain the same after joining. 
• Welding is the best suitable to join the large assemblies. While the brazing is best suited for joining small assemblies.
• Welded joints can withstand high temperatures. While the brazing joint cannot withstand high temperatures.
• Welding is mostly used to join similar metals. Brazing is mostly used to join dissimilar metals.

Explore more information:

1. Riveting Vs Bolting

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Difference between boiler mountings and accessories

When operating any boiler, whether it has water tubes or fire tubes, boiler mounting and accessories are important. So here,  In this article, you can check out the Difference between boiler mounting and accessories to better understand this topic.

What is Boiler Mounting?

Boiler mountings are attached to the surface of the boiler, therefore the name mountings. Without the mounting, it is impossible for the boiler to operate.

What are Boiler Accessories?

Boiler accessories are mounted to the boiler drum to increase the boiler efficiency. These components are not as essential as boiler mounting, and while the operation will still function without them, its efficiency will be fairly poor. 

Boiler mounting  Vs Boiler Accessories: 

• Boiler mounting is an essential apparatus without a boiler that cannot be operated. While boiler accessories are not an essential apparatus. This is done to increase the boiler plant's overall efficiency and working condition.
• Boiler mounting is mounted on the boiler. Boiler accessories are not generally mounted on the boiler but installed within or near the boiler.
• A boiler cannot work without mounting. A boiler can work without accessories. 
• Boiler mounting occupies less floor space. Boiler accessories take up significantly more floor space.
•  Inside the boiler, the fluid parameters are controlled by the boiler mounting. Outside the boiler, the fluid parameters are controlled by the boiler accessories.
• Boiler mounting can ensure the safety of the boiler. Boiler accessories can ensure the efficiency of the boiler.
• Boiler mounting is essential for the operation to be carried out. Boiler accessories are not at all essential for the operation to be carried out.
• Some example of Boiler mounting is water level indicator, pressure gauge, blow-off cock, feed check valve, Fusible plug, and safety valves. While the example of boiler accessories are economizer, air preheater, steam separator, superheater,s, and feed pumps. 

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Both centrifugal and positive displacement pumps are effective in moving fluid through complicated industrial systems. As both pumps displace fluid, it is important to identify when each pump type should be used to fulfil the purpose. In this article, you can check out the Centrifugal pump Vs Positive displacement pump. Also, you can learn how they differ from each other, their different applications and more details. 

What is a centrifugal pump?

A spinning impeller in a centrifugal pump transmits the kinetic energy of the motor to the liquid. As the impeller rotates it draws in the fluid causing increased velocity that moves the fluid to the discharge point. 

What is a positive displacement pump?

Positive displacement pumps are characterized by an operation that moves fluid by trapping a fixed amount of volume, usually in the cavity. The trapped fluid is then forced into the discharge pipe.

Centrifugal pump Vs Positive displacement pump: 

• The clear difference between them is their operation. In the Centrifugal pump impellers imparts velocity from the motor to the fluid, resulting in pressure at the discharge point. Positive displacement pumps trap a certain amount of liquid and force it from the suction to the discharge point. 
• In a centrifugal pump, the flow varies with change in pressure. Whereas flow rate remains consistent with changing pressure in the positive displacement pump.
• For a centrifugal pump, the flow rate decreases when the viscosity increases due to frictional losses inside the pump. That is the reason why these pumps are not generally used on viscosities over 850 centistokes (CST). In contrast, the flow rate increases with increasing viscosity in the positive displacement pump. This is because the internal clearances allow higher viscosity handling. 
• Centrifugal pump efficiency peaks at a specific pressure and any variations in the pressure level decrease the efficiency dramatically. Efficiency is less affected by the pressure in the positive displacement pump. 
• Standard centrifugal pumps can't create suction lift. Whereas positive displacement pumps can create a vacuum on the inlet side, making them capable of creating suction lift. 
• Centrifugal pumps are not recommended for shear sensitive mediums because the high-speed motor can lead to shearing of the fluids. Because of the low internal velocity, the pumped medium receives less shear. Thus, positive displacement pumps are appropriate for shear-sensitive fluids. 

The best condition to use a centrifugal pump:

Centrifugal pumps are commonly used to transfer low viscous fluids at a high flow rate, within low-pressure installations. They are used when a pump is required a large volume of media to transfer. 

The best condition to use a positive displacement pump:

Positive displacement pumps are used for their ability to handle high viscous fluids, at high pressure. Thus, they are used for a solution that can handle more difficult conditions. 

As we see above detailed discussion. We come to the point that, with increasing velocity and varying pressure, positive displacement pumps become a necessity. 

Applications of centrifugal pump:

• Irrigation
• Firefighting
• Air conditioners
• Municipal water supply system

Applications of positive displacement pump:

• Oil processing centres
• Municipal sewage system
• Manufacturing centres in industries

Summary: 

Centrifugal pumps offer lower maintenance costs as there are few moving parts. Therefore, they are suitable for applications where the pump is used often, or continuously. The simple construction ensures there are a wide variety of construction options, including stainless steel or more corrosive applications.

Positive displacement pumps are suitable for handing mediums containing high levels of solids, including wastewater and food particles. As they are generally lower speed pumps, those with larger pumping chambers such as progressive cavities are low shear pumps and provide smooth flow. 

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Difference between welding and soldering

Welding, soldering, and brazing are all techniques of connecting two or more metals or, in certain situations, other materials. They can also be used to fill gaps in metal parts. So how do you choose which technique to employ? This decision is influenced by the materials, desired strength, and application. Let us check out the difference between welding and soldering here in this article. 

Difference between welding and soldering:

• Welding joints are stronger in comparison to soldering joints.
• Soldering requires preheating of workpieces but no preheating of workpieces is required in the welding process.
• In welding the base metal changes its mechanical properties due to cooling and heating, Base metal does not have a significant effect on their mechanical properties in soldering.
• Base metals in the welding process are heated to melt and create a strong bond whereas in soldering base metals require no heating or melting.
• Heat treatment is the process where metals' physical and chemical properties are altered by heating and cooling it back. This is common in welding techniques but not in soldering.
• A welder and solder are both professional workers who require skills and experience in their assigned job. Welding works are frequently found in the automotive, industrial, and construction industries. Soldering is mostly used in the electronic sector.
• Different metals need different temperatures in order to melt and form a connection. Steel variant is usually used in welding may require a temperature between 3000 degrees Celsius and 20000 degrees celsius. Soldering on the other hand will require roughly 350-450 degrees celsius.

Explore more information: 

1. Difference between welding and fabrication
2. Difference between welding and riveting
3.  Welding Vs Brazing

Difference between PSI and PSIG

What is PSI?

PSI is a per square inch, it is a common pressure measurement unit used in a variety of applications. It is commonly used for non-SI industrial and technical purposes such as there pressure, fuel storage, and distribution. wastewater management, and test and measurement, among many others.

What is PSIG?

PSIG is the gauge pressure, which is expressed in pounds per square inch gauge. It is a pressure unit that is measured relation to the ambient or atmospheric pressure. It is the measurement of pressure without taking into account local atmospheric pressure. When the pressure inside the system exceeds the atmospheric pressure, the gauge pressure is applied. And atmospheric pressure is the pressure exerted by the weight of the atmosphere, or more simply the pressure within the earth's atmosphere.

Difference between PSI and PSIG:

• PSI stands for pounds per square inch, while PSIG stands for pound per square inch gauge.
• PSI is the force applied on a surface with one square inch of the area, while the PSI gauge is a measure of pressure, but a gauge measure only.
• PSI is mostly used in wastewater management, fuel storage and distribution, tire pressure and so on, while the PSIG is mostly used in the refrigeration and air conditioning industry.
• PSI can be changed to a various unit that is used to measure pressure, while the PSIG specifies that pressure is a measure relative to the atmospheric pressure only.
• PSI is a measure relative to a vacuum, while the PSIG is a measure relative to the atmospheric pressure.

Difference Between Machine and Structure

The most important difference between a machine and a structure is that machines convert energy into productive work, whereas structures do not. Let us check out the difference between machine and structure in this article. 

What is Machine? 

A machine is a combination of mechanisms that transmits and modifies the available mechanical energy into some useful work. 

Examples of machines: Bridges, Buildings, Machine frames, Roof truss. 

What is Structure?

A structure is made up of a collection of rigid bodies that do not move relative to one another.

Example of structures: Shaper, Lathe, Screw jack, Slotter. 

Difference between machine and structure: 

1. The parts of the machine move relative to one another, whereas members of the structure are built to bear the load, mainly compressive load. 
2. The machine serves to modify and transmit mechanical work, whereas the structure serves to modify and transmit forces. 
3. A link of a machine may transmit both power and motion, whereas the members of a structure can only transmit forces.

Pros and cons of electric vehicle

Electric vehicles are regularly changing and their technology still evolving when considering the pros and cons of electric vehicles. Electric vehicles use a rechargeable battery-power engine instead of a typical gas engine. 

Pros of electric vehicle | Advantages: 

1. Electric vehicles are better for the environment. 
2. The major pros are electricity can be a renewable source while gasoline can not be a renewable source. In addition, electricity is cheaper than gasoline. 
3. Quieter than gas vehicles. 
4. Electric vehicles are energy efficient.
5. On an electric vehicle, you will get a tax credit and incentives. 
6. Electric vehicles required less expensive and less frequent maintenance. 
7. Different lanes are provided for this vehicle, thus they shorten your commute time. 
8. It reduces emissions and thus, reducing the carbon footprint. 

Cons of electric vehicle | Disadvantages: 

1. Electric vehicles travel less distance as compared with gas-powered vehicles. 
2. The charging time of the vehicle is long.
3. Expensive than gas-powered vehicles, due to the large initial investment.
4. The battery replacement cost is very high. 

Thank you for reading this article, If you have any queries regarding this article on the pros and cons of Electric vehicle then feel free to do comment and give suggestions in the comment section below.