Mechanical Engineering

Try WD 40, sun screen, or a mixture of vinegar and water.

drawing materials r those through which we do drawing..........n we use it by ourself

Designer mostly drafting, piping engineer mostly calculation

The amount of current (amps) is controlled by the user. It's done with a variable resistor. Another thing to note is whether you are welding constant current or constant voltage. If you are welding constant current, the voltage will vary and a set Amp measure will remain constant. With constant voltage, the current will vary and that's determined by the resistance. Constant voltage should be an easier set up. I'm not 100% sure but most stick welding is constant current, which is why increasing the arc length produces more heat, because more arc length should increase the resistance, which would cause the welding machine to increase voltage to keep the current constant.

Your question has a basic flaw. With a system of pulleys the ratio cannot be 10, it can be only a power of two: 2, 4, 8, 16...

There is no mechanical advantage, it's only a matter of convenience: using a force of 50 lbs one can lift a weight of 400 lbs, but in order to do that one has to pull the rope for a distance equal to 8 times the lifting height.

The foot valve in a well should be the same size as the down pipe, usually 1 inch, but could be as small as 3/4 or as large as 1 1/2 . Foot valves are made in all those sizes.

Torque is related to friction and diameter. torque usually is done to achieve a preload stress in the bolt of 50% of its ultimate strength

For unlubricatd bolts,

T= 0.2DP where D = diamter and P = bolt preload and T = torque

Bolt preload stress = P/A where A is stress area of bolt

#12 = 0.216 inch diameter, A = 0.024

For standard steel bolts of 80,000 psi strength,

P = 1920/2 = 960 pounds

T = 41 inch pounds

For high strength bolts of 160,000 psi strength,

T = 82 inch pounds

If bolts are lubricated, use

T = 0.15DP

T = 31 in lbs standard and 62 inch pounds high strength

single fixed pulley changes the direction of the applied force, you pull down, the object goes up.

When 'dissimilar' metals touch, they can create one of the prerequisites for galvanic corrosion.

Use Hastaloy X

A bead is a compleated weld pass. Just like a bead of glue or adhesive, it is the same way. A compleatley bonded joint.

decrease the cutting forces

1

There could be multiple reasons for this. The best thing to do is check the cheapest thing first. First, check the spark plugs for black or dark tips. If they show signs of being burnt, replace them. Next, check the spark plug wires for poor conductivity (insulation or frayed wires). Inspect the spark plug wires for gashes, tears, or signs of wearing. If that doesn't solve the problem check the battery voltage and make sure you have properly grounded components. Also check the distributor for proper connection.

Lube oil consumption depends on engine design and motor operating conditions. Dieselnet is a good source.

Typical oil consumption values for pre-1980s engines were 0.46 g/kWh (0.34 g/bhp-hr; 0.25% of fuel consumption), pre-1990 engines ranged between 0.33-0.48 g/kWh (~0.15 - 0.20% of fuel consumption).

A test on a number of 2002 heavy-duty and medium-duty engines in the US yielded an average of 0.22 g/kWh (0.1% of fuel consumption).

Year 2007 heavy- and medium-duty engines consume on average 0.08 g/kWh (around 0.03% of fuel consumption)

ON the cad offset the bend radius from the internal radius of the sheet metal part by 40% of the total sheet thickness,and measure the chord length of the radius. that will be the developed length.

You can generate electricity with a 27KVA alternator, a big wheel, and a 2HP motor, but you will not be able to even come close to generating 27KVA. The best you could hope for is about 1KVA or so, because a 2HP motor can only do about 1.5KW of work, and efficiency and power factor losses will make the output be even less.

Many older windows had thick glass which was pretty heavy and the wood-on-wood fit tended to stick. This combination made them hard to open and close. This problem was solved by hanging a counterweight inside the window frame and attaching it to the window by means of a rope, routed over a pulley. This had the effect of making the window seem lighter and certainly easier to manipulate.

penis

yes, whatever is injected is melted first

The difference is percentage of carbon, the main alloy element. Those irons containing less than 2% carbon are known as steels while those containing more than 2% carbon are known as pig iron. Pig iron is obtained from iron ore by processing it with coke in a blast furnace. This pig iron is then further processed to reduce the carbon content in different furnaces to obtain steels. These steels can be then further processed to obtain alloy steels, stainless steels by adding elements such as silicon, manganese, chromium, nickel, etc.

it is advised not to repair nozzles unless it is done by a specialist as these nozzles generate the shape of the flame so as to not burn through the GT combustor housing or disrupt the laminar flow of air in the GT which may lead to excessive vibration and of course catastophic failure

Mechanical Advantage. Using a lever of appropriate size you could lift a 500 pound load with just 50 pounds of force. The distance from the weight to the Fulcrum would have to be 1/10th the distance from the Fulcrum to you, pushing down with 50 lbs of Force.

its a simple way

It is used to clean impurities away from the surface to be soldered or brazed. Many times it is included in the flux.

The use of acid type of fluxes is actually detrimental to good plumbing , soldering practices because if the flux is not properly cleaned the joint will eat away from the corrosive action of the acid