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Mechanical Engineering

Mechanical Engineering is a branch of engineering that encompasses the generation and application of heat and mechanical power and the design, production, and use of machines and tools. Mechanical engineering involves application of the principles of dynamics, control, thermodynamics and heat transfer, fluid mechanics, strength of materials, materials science, electronics, and mathematics.

10,989 Questions

Is there a optimal flow rate for maximum heat transfer when using a heat pump?

Yes there is an optimum flow rate. Kind of! The heat pump manufacturer will post on the internet or in the users guide what the maximum and mimimum flow rate through his heat pump should be. I take it that the optimum then, is anywhere within that range. My pump manufacturer prescribes 20 GPM to 70 GPM for the heat pump I will be using. Too low a flow causes the heat pump to overheat. Too high a flow is hard on system components. dburr

What is welding electroid coating do?

The coating on welding rod is called flux. It acts as a catalyst for the surface of material to be welded is to melt easily as well as acts as cleaning agent to that area so as to generate a firm bonding between the metal to be welded and molten welding rod metal. It also acts as a coating to the welded portion which prevents from atmosphere would result a sudden cooling hence brittle. Rusting of surface also will be protected for a long time if not removed before painting or proper coating.

What are advantages of trane centrifugal chillers?

The advantages of trane centrifugal chillers are it is environmental friendly when used in refrigerators, they are easy to operate and are easy to install.

Does a machine magnify the force that you exert?

Absolutely. four of the most basic machines do exactly that.

A lever increases the force you exert by how close the fulcrum is to the object being move, and how far the applied force is away from the fulcrum.

A screw transfers rotational force (torque) to a lifting force, and increases that force based on the pitch of the threads.

A wedge increases lifting force based upon the pitch of the wedge from horizontal.

A pulley, when using more than one, will increase the applied force, on an order of magnitude equal to the number of pulleys used.

**Note: the total work applied equals the total work transmitted less friction. The force applied times the acceleration equals the work, the machines reduce the acceleration to increase the force transmitted.

Is Mechanical engineer a suitable career for possible autistic adults?

Yes, a mechanical engineer is a suitable career for autistic adults. You can meet with a counselor at a college to decide what is best for you.

What are the reasons of Erosion and deposits in steam turbine?

The steam.

Steam passing through a turbine spinning at a speed of 3600rpm will have a tip velocity on it largest wheel of about 1800 feet per second. In order to reach that speed the steam must be moving at least that fast through the blades. that is about 1200 miles per hour, or more than 1 1/2 times the speed of sound. The steam also over time picks up impurities from the steam pipe to the turbine, these will cause erosion similar to sand blasting. The water in the boiler has impurities that can't be removed effectively, one is silica. At high temperature in the boiler the silica vaporizes into the steam passages, as it passes through the turbine the steam cools and the silica solidifies again into deposits on the turbine blades. There are other causes but these are the most common.

What is the purpose of the crankshaft in a petrol engine?

The crankshaft converts the linear motion of the piston into rotation of the crankshaft.

Is post weld heat treatment is part of Non-destructive testing?

Post weld heat treat is done to bring back strength properties lost during welding. It is not related to non destructive testing

Which material has the highest tensile strength spider silk copper glass or plastic?

spider silk's tensile strength (per unit of density) is about ten times that of steel cable.

What is a tensile tester machine used for?

It is a scientific machine that applies tension to an item until it fails. It is used for quality control and to know the durability of certain items. It can also determine how certain forces will effect the material. For example, it could predict how certain weather forms effect housing materials.

What is a 5 axis CNC used for?

A 5-axis CNC is a computer numerically controlled tool that is used in parts manufacture. This creates parts by starting with material and milling away the excess.

How is a stress strain curve obtained?

From the origin O to the point called proportional limit, the stress-strain curve is a straight line. After reaching the proportional limit, the curve shows less stress until it gets to the ultimate strength, where the stress decreases.

Why can't the heat generated by a combustion engine can be used as a source of energy instead of cooling engine and wasting it?

What you are after is perpetual motion, which isn't going to work. Any type of energy can be converted to heat, but heat can only partially be converted to energy. Most of the problems stem from trying to remove heat, rather than allowing it to accumulate. Heat is the graveyard of energy.

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Some heat from engines can be recovered and used for space heating. The heaters in automobiles do just that. However, more often than not the build up of heat from an engine is more than is desired for auxiliary uses, and it must be discarded to keep from overheating the equipment. Some building emergency generators can use some of that heat in a heat exchanger for heating non-domestic water supplies, but the potential for leaks precludes it from use for domestic water heating.

What are pdms piping modeling commands?

There are many PDMS piping modeling commands. Some of these include: Q axes at ph= to check the head of the branch of the pipe, Q axes at pt= to check the tail of the branch of the pipe, Q Hstu= to show the branch head tube attribute, and Q Lstu= to show the branch tail tube attribute.

What are application of cast iron ingot molds?

Casting small ingots, as the name implies. Big ingots are more likely to be cast in sand molds.

The reason you'd want to cast ingots, or blocks of metal, is because that's how raw metal is sold and delivered. And because the metal business at the level where you're dealing with ingots is very customizable, you at the car company can call me at the steel company and order 20,000 kilograms of iron alloy with x amount of silicon, x amount of manganese, x amount of copper and x amount of aluminum alloyed into it, give me a delivery date and have a massive block of that exact mixture show up on your loading dock on the date you asked for it.

What are the aims and objectives of a lawn mower?

The aims and objectives of a lawn mower are to cut grass at a specified height while avoiding damage from other, more rigid, objects that might be encountered.

What is Maximum Allowable Working Pressure Calculations?

The ASME Boiler and Pressure Vessel Code details all the various calculations necessary to determine the MAWP of any pressure vessel.

What type of electrodes are used in MMA arc welding?

A huge variety of electrodes are available. MMA, SMAW, STICK WELDING are all the same process. Electrodes are produced to weld almost all metal and metal alloys. From steel to cast iron to aluminum to stainless steel to monels to ???? If it can be STICK WELDED an Electrode is made to do the job.

What is a thrust bearing typically used for?

Thrust bearings are a type of rotary bearing designed to support a high axial load while allowing movement between two parts. There are many types of thrust bearings, but they are typically used for automotive assemblies, particularly in wheel hubs and manual transmissions.

Who is in the woozband and what are there real names?

Jay Wooz Mya Wooz Max Wooz Jenny Wooz (Max and Jenny are married) Zeena Wooz Good Ol' Wooz Nona Wooz and Zack Wooz. hope it helped

Who thought of the idea to build the eifull tower?

Gustave Eiffel, who also designed much of the internal structure of the Statue of Liberty.

What is the working of economizer in a boiler plant?

Economizer is a device in which the waste heat of the fuel gases is utilized for heating the feed water.