Mechanical Engineering

Many principles are used in hydraulic systems the basic being the Pascal's law

The pressure inside a closed cylinder when engine cranking varis based on engine starter motor speed. The manufacturer designs the engine with what is known as the compression ratio, this means the piston sweeps the volume of the cylinder compressing the air and fuel as it reaches top dead centre. The amount of pressure in a cylinder is not that important provided all cylinders are even, and the cylinder leakage is not excessive. Each manufacturer will have their own specifications for each engine they design.

Springs are used to store mechanical energy. Tension/extension springs get longer as force is applied (seen in trampoline springs), compression springs get shorter as force is applied (seen in bed springs), and torsion springs rotate through an angle as force is applied (seen in clocks).

The reason why it is called a barometric condenser is because it makes contact and it is a long vertical pipe into which it condensates and cools the liquid flow to accomplish the removal of pressure. It is also stated that when the pump is used the system is called a low level barometric condenser.

A manometer is a device for measuring pressures, especially the word is used for pressure meters that are constructed to use a liquid in a transparent U-tube.

A peizometer is specifically about measuring pressures in ground water wells.

As a rocket descends, gravity is pulling it down whilst drag is stopping the gravity having some of its power because without the drag the rocket would be pulled down to the ground within a matter of seconds.

I don't know how it affects it on its ascent!!

Sorry!!

200 bhn max.

Simplest example I can think of is possibly an automatic door, where the pneumatics are pushed along, operating the valve which opens the door. Where a pilot makes it return to its original position.

Everybody used to call it "stick welding". MMAW Manual Metal Arc Welding is the correct nomenclature. The "sticks" are electrodes held in an electrode holder connected to a power supply. Establish an arc between the end of the electrode and the metal and move across the joint. As you weld the electrode is consumed. Discard the "stub", insert a new electrode and continue.

Overaging usually pertains to an alloy that has been "overaged" meaning an alloy that is aged to long so that coarsening has taken place. Aging time and temperature determine the size and number of precipitates. Onset of coursing the large precipitates grow at the expense of small precipitates. Under ageing and/or overaging alloys have hardness and strenght less then the maximum possible.

According to Bernoulli's principle, the sum of static, velocity and kinetic heads at two points in a fluid flow should be equal, assuming steady state. A manometer measures static head through the height of fluid at two points. Hence, it would be apt to say that manometer is an application of hydrostatic measurement.

To throttle the medium being used as a globe is NOT a positive shut off

A globe valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body.

For example, globe valves or valves with a similar mechanism may be used as sampling valves, which are normally shut except when liquid samples are being taken. Since the baffle restricts flow, they're not recommended where full, unobstructed flow is required.

Mechanical looseness, misalignment of internal bearings, misalignment to or from a driven load, bent or distorted rotating components, failed bearings, worn bearing housings, worn bearing journals, misalignment of rabbet fits, improper mounting, soft foot, structural defects in mounting hardware or surfaces, dynamic balance of all rotating components, conflicts with natural frequencies in the area of or connected to the device.

Production method is different. Cold rolling method and different.

only on the out side of the car but this isn't conventional plastic it is a plastic like reinforced carbon fiber which is useful because its light and strong but right now is quite expensive but in the future i think more cars will be made out of plastics like carbon fiber so yes i think in future more cars will be made out of carbon fiber.

Meters per second x 3.28 = feet per second.

There are numerous types of valves. Each has a specific function and usage and differs from the others. From seismic , to pressure they can be specialized or simple in function. A valves purpose is to allow, stop, or reduce flow of a substance thru a pipe. Most common valves on homes would be gate and ball valves. In order to learn which valves are best for your application, consult a professional. types below, that i can think of off the top of my head, there are more i am sure.

-ball

gate

mixing

pressure

reducing

butterfly

cocks

angle

temperature

seismic

ansul

backflow

check

1.Universal Group of Institutions, Lalru (Mohali)

2.Indo Global Colleges, Abhipur (Mohali)

3.PEC CHANDIGARH (Excluding Punjab)

4.Thapar university, Patiala

5.SHAHEED UDHAM SINGH COLLEGE OF ENGG.AND TECHNOLOGY (MOHALI)

6.GNDU (main campus), Amritsar

7.GNDEC, Ludhiana

8.NIT, Jalandhar

9.DAVIET, Jalandhar

10.LPU,Phagwara(Jallandhar)

11.BSIET,Gurdaspur

12.GZSIET ,Bhainda

Control of the active power supplied

by the generator to an interconnected

network

• Control of network frequency on an

isolated electrical network

• Protection of the unit against over speed

in case of load rejection

In modern Combined Cycle Power Stations, the exhaust gas from Gas Turbines, which contains significant amount of heat energy is diverted to water boilers to generate steam which in turn runs Steam Turbines. Usually Two or Three GT's exhaust gas is used to run a ST.

The significance of this is that, the otherwise wasted exhaust heat is intelligently used to generate power, thereby pushing the efficiency of a single GT of 25-30 % to a combined cycle efficiency of about 45-50 %.

Alternatively in some industries, the exhaust gas can also be used for process heating requirements.

Screw Pitch is defined as the axial distance between threads. One complete revolution of the screw will move it into an object the distance of the pitch. The smaller the pitch, the greater the mechanical advantage (ability to do work) achieved.

Young`s modulus of aluminum is about 70 GPa, or 10.3 x 106 psi.

120

Since the measures of the angles of supplementary angles add up to 180, 60 plus something else equals 180. 180-60=120

Pressure pipes and gravity pipes are two different types of pipes used in plumbing systems. The main difference between them is how they move water. Pressure pipes use pumps or other pressure sources to move water through the system, while gravity pipes rely on the force of gravity to move water downhill. The choice between pressure pipes and gravity pipes depends on factors such as the terrain, water source, and desired water pressure.

You build a basic car, with a body and a way to support the front wheels and the back wheels.

Each set of wheels should be firmly attached to an axle, maybe a piece of dowel, so

that when the axle turns, so do the wheels.

Then you need some way to

attach the end of a strong rubber band to the middle of each axle so that

when you rotate the wheels, the rubber band winds around the axle and

stretches tight.

You can do this with a small nail or screw put carefully

through the dowel. The best way to wind the wheels is probably to push down

on the car while you push the car along a surface, like carpet.

once the rubber band is really tight,

you let the car go, and the stored energy in the rubber band unwinds the

axle, and off goes the car

You don't have to have the band wind around

both axles ... you could make it either just frontal drive or

rear-wheel drive, but it probably goes better if you use both axles.

You

could also use two rubber bands, one for the front wheels and one for the

back wheels, with the ends of each rubber band fixed to the middle of the

car.

Remember, the car will go fastest and the most distance if you use a

really BIG strong rubber band, and can wind it up around the axles really

really tight. But if you make it TOO tight or too strong, the car or the axles might break when you wind it up, which is not good and really annoying.

Another way of making a car like this is to make it like the rubber-band

powered toy airplanes. Make a light frame with 4 wheels, and buy a little

toy propeller or take it off a toy airplane, then wind up the rubber band

by winding the propeller. Then when you let go the propeller, it will drive

the car along.