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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
A pitch box is an electronic device that inputs a signal from a musical instrument such as an electronic guitar, distorts that signal, and then mixes the input with the distorted signal to produce an output. Typically the pitch box is capable of producing a variety of types of distortions. To hear what's possible you might try searching youtube.com for pitch box.
How do you relate AC and DC voltage by means of complex numbers?
A complex number is a combination of real and imaginary numbers. An example of a complex number is the expression (a + jb), in which the letter j is called an 'operator'. In this example, the operator +j indicates that the quantity b is acting at an angle of +90o to quantity a -or is 'leading' a by 90o. If the operator was -j, then it would be indicating that quantity bis acting at -90o to quantity a -or is 'lagging' a by 90o.
Mathematicians use the letter 'i' to represent an imaginary number, but in electrical engineering we use the letter 'j'. This is because we already use a lower-case 'i'to represent an instantaneous value of current. In mathematics, the operator is sometimes written after the quantity to which it applies (i.e. 'bj'), but it is more usual, in engineering, to place the operator in front of that quantity (i.e. 'jb').
The application of the operator 'j' to a phasor, then, acts to rotate that phasor, counterclockwise, through 90 degrees.
The term, 'imaginary', is misleading -it doesn't mean that it exists only in the mind! It is simply a mathematician's term for 'quadrature', meaning 'lying along the y-axis'.
A.C. quantities, such as current and voltage, can be resolved into horizontal and vertical components. So, we can represent an alternating-current quantity by a complex number which represents its in-phase component together with its quadrature (plus or minus 90o) component. For example, 3+j4 could represent a 5-A current, whose in-phase component is 3 A, and whose quadrature component is 4 A (i.e. which leads the in-phase component by 90o).
Complex numbers enable complex a.c. circuits to be resolved relatively easily, and without the need to construct complicated phasor diagrams.
As in-phase and quadrature ('imaginary') components only apply to a.c. quantities, we do not need to apply complex numbers to d.c.
Is mig welding better than gas welding in terms of strength?
It depends on what metal you are welding and how thick it is, but in general, no. Any process that will raise enough heat for adequate weld penetration is for the most part equal.
3/4 inch would be too small for anything but just liquids. As long as there is a trap under the sink, there shouldn't be a health hazzard. You will have to be a little creative in connecting the sink drain to 3/4 but possible.
What is use of thrust pad in steam turbine?
Thrust pads are used to protect the steam turbine rotor from damage due to axial displacement due to axial thrust created by entry of steam in the turbine. generaly the pads clearence is 0.45mm for a bearing size 250mm.
How to introduce molten metal into molds?
The molds should be sand coated insides and a hole upside mold then introduce the molten metal.
Gear Stick Door handle Hammer Spanner
a crowbar
Scissors, wheelbarrows, scissors, teeter-totters (seesaws). A crowbar or pry bar is also a level in either direction, both of which also employ a wedge.
Where to see resonance on sonar lofargram?
Harmonics are often seen on shaft and blade signatures of surface ships and become broad and diffused with cavitation. also main electrical power sources will show harmonics related to pole pairs on the motors etc.
How long does an honours degree last?
As long as any other degree particular to the level referred to. It's just that that program is more rigorous in subject content.
As long as any other degree particular to the level referred to. It's just that that program is more rigorous in subject content.
As long as any other degree particular to the level referred to. It's just that that program is more rigorous in subject content.
As long as any other degree particular to the level referred to. It's just that that program is more rigorous in subject content.
As long as any other degree particular to the level referred to. It's just that that program is more rigorous in subject content.
As long as any other degree particular to the level referred to. It's just that that program is more rigorous in subject content.
In any general application, hydraulic fluid is contained inside a system consisting of pumps, actuators, and hoses. The hydraulic fluid is not actually consumed, except in the case of leaking fluid or a fluid change.
Testing and inspections are done to uphold the safety standards of the country in which they exist.
What steel has a yield strength greater than 500MPa?
There are too many to list. For example wrought low alloy steel like 4130, or 1/2 hard stainless 301 all exceed that value
1.It is the process of giving water to the plantations
its benefits are as follows
a.the plants get water to survive .
b.the different irrigation methods which are available can save time and are cheap
What is a good lubricant for camera tripods with plastic moving parts?
Silicone (not silicon) lubricants are perfect for this kind of thing. They come in sprays and as a paste in a tube, they are not expensive and they are commonly available at Ace, True Value, and about any auto parts store. The spray is almost certainly your best bet.
a letter of acceptance is a letter telling you that you got into a certain school
How do you use a milling machine fly cutter?
a milling machine fly cuttr is a kind of machine which shapes the surface off rellers as smooth ro flutted bye use ao a resiprocating cutting diamond which cuts a narrow line of the surface by the profile which is ordered .
Okaaaay.
A fly cutter consists of an arbor which holds a square tool bit (basically a lathe tool.) Basically you grind the bit to the right shape. This is sometimes complicated, any thing about tool grinding should have it. Then you put it in the fly cutter with the minimum sticking out. put fly cutter in the mill spindle, and cut. I suggest a VERY fine feed and light cut as being to aggressive can stall a cheap mini-mill and damage the cutter, work, or mill on a bigger one.
Is the steel strain hardening exponent temperature dependent?
yes, with increased temp, the s.h.e decreases
hi
According to your answer . I must say that as I know , when we anneald metals ( e.g. Iron ) the S.H.E increased while you can decreas it by cold-work .
Why is the jaw of a nutcracker serrated?
To help grip the nut and prevent it from slipping out when you apply pressure. Try cracking a nut with a portion of a nutcracker that is not serrated and you quickly will understand.
