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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
Why to out bleed steam in turbine?
When steam contains liquid droplets while doing work at high temperatures, the water droplets can etch metal. To combat this, steam can be superheated or the pressure of the system is reduced.
ENDING OPERATIONS AND CLEANING UP Ensure the handle is left in a safe position after use. Leave the work area in a safe, clean and tidy state. POTENTIAL HAZARDS AND INJURIES Sharp edges and burrs. Crush and pinch points. Hair/clothing getting caught in moving machine parts. Operator’s hands may be caught and drawn into the counter-rotating rollers.
When was the steam engine invented and what year?
A learned writer in ancient Alexandria, named Hero, wrote a manuscript describing various devices and ideas of the time. Although it is not proven that Hero was the inventor of any of these devices, he is given credit for the earliest mention of steam power. Hero described a method to open the doors of a temple with the action of a fire on the altar at the front of the temple.... the first "Steam engine."
What type of an engineer do you have to be to build roller coasters?
A clever and creative mechanical engineer is the person behind a great coaster.
What is the formula for finding the volume of steel in a steel pipe?
Subtract the area of the I.D. of the pipe from the O.D. and multiply the result by the length. (I.D. and O.D. are inside and outside diameter respectively)
yes it can although it is not reccomended, if this is your only option preheat the cast iron to almost cherry red and weld with a low hydrogen rod such as 7018
Why you use cut-off ratio in diesel cycle not in Otto cycle?
We use cut-off ratio in diesel cycle and not in Otto cycle because it is cost effective.
How does the stator in a water turbine work?
The stator in a water turbine plays a crucial role by directing the flow of water onto the turbine blades, converting the kinetic energy of moving water into mechanical energy. It consists of fixed components that help guide water efficiently through the turbine system, optimizing flow conditions to enhance performance. By creating a specific flow pattern, the stator ensures that the blades receive the maximum force from the water, improving the overall energy conversion process. Thus, it significantly contributes to the turbine's efficiency and effectiveness in generating power.
What is the function of air foot pump?
To pump air. Acutally, there are many things thant can be done with pressurized air -- even make a computer!
simply means the tester's measurement is displayed in an analog way (not digital) For example: a moving needle that points to a scale a clock with hands is ANALOG
a clock that displays the time like this (11:55pm) is DIGITAL
What is the mechanical advantage of a machine which multiplies distance?
The mechanical advantage of the machine is"if you give small accelration , it will increase the speed of the engine... It is possible by mechanical
Why are liquids sometimes more practical to use in a hydraulic system than gases?
Because liquids cannot be easily compressed into a smaller space.
What is a resistance decade box?
Resistance decade box is nothing but Resistance bank. It has various ranges of Resistance value ranging from few ohms to few mega ohms. In other terms, large value of resistance are fabricated in single box is said to be Resistance decade box.
What is a name of a famous Truss bridge?
The Bolman truss bridge is a famous bridge that was built in 1869. It was built to carry the train's on the railroad's main line. Hope this helps;] The Bolman truss bridge is a famous bridge that was built in 1869. It was built to carry the train's on the railroad's main line. Hope this helps;]
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What is the basic working principle of air conditioner?
Diagram of a typical air conditioner
This is how the evaporation cycle in an air conditioner works (See How Refrigerators Work for complete details on this cycle):
- The compressor compresses cool Freon gas, causing it to become hot, high-pressure Freon gas (red in the diagram above).
- This hot gas runs through a set of coils so it can dissipate its heat, and it condenses into a liquid.
- The Freon liquid runs through an expansion valve, and in the process it evaporates to become cold, low-pressure Freon gas(light blue in the diagram above).
- This cold gas runs through a set of coils that allow the gas to absorb heat and cool down the air inside the building.
Mixed in with the Freon is a small amount of a lightweight oil. This oil lubricates the compressor.
So this is the general concept involved in air conditioning. In the next section, we'll take a look inside a window unit.
How do you calculate torque of a gate valve?
how to calculate gate valve torgue. What is the torgue required for 1100NB gate vave used for 3kg/cm2 steam line
What are the welding defects in sheet metal?
Porosity is the most common weld defect. For beginners don't rule out lack of penetration and non-compatible welding rod or filler wire. It all depends on how the weld failed if it has. Proper prep and preheat is required in many types of welding. So a little more detailed question can help me give you a more detailed answer. Trapped slag is also a common problem. It creates a void in the weld. Although porosity is the most common defect some porosity doesn't necessarily affect the weld strength.
What is function of lantern ring in the gate valve?
A lantern ring, in engineering, is a part of a stuffing box. It keeps in place the lubricating fibres of a shaft that penetrates a bulkhead.
What is the working principle of steam jet ejector?
it is not based on bunoullies theorem it is based on mach number.when sonic speed of steam converted to supersonic steam by nozzle vacuum is created.
What is the advantages of screw conveyor?
Advantages of Screw conveyor:
* Screw conveyors are capable of handling a great variety of bulk materials from sluggish to free-flowing. * Screw conveyors can have multiple inlet and discharge points. Bulk materials can be conveyed and distributed to various locations as required. Slide gates or valves can be added to control the flow into and out of a screw conveyor. * When a screw conveyor is used as a metering device, it is considered a screw feeder. Screw feeders are used to initiate a material process by metering product from a bin or hopper. Disadvantage of Screw conveyor:
* When the angle of inclination increases, the allowable capacity of a given unit rapidly decreases.
