All Questions

8,062 questions
Filter by
Sorted by
Tagged with
6 views

Is it ok for clutch to slip in DCT in certain situations?

When driving a car with manual transmission on start you slowly release the clutch so the car doesn't jerk. So clutch slippage here is not that bad if I understand this correctly? And also couldn't ...
4 views

Why does rebar in reinforced pre-stressed conrete reduce in deflection if compressive stress is applied to member?

According to What is Prestressed Concrete? - Practical Engineering, one way to reduce deflection in the steel rebar is to pre-stress the rebar by applying compressive stress in the member before ...
3 views

I need to calculate the minor losses in a steam header. I have calculated the major friction losses. But I can't figure out how to find the minor losses since the header has multiple tappings and not ...
8 views

Final temperature of an isolated vessel - Thermodynamics

8) Consider an inextensible tank of 10 m3 of volume, isolated by an adiabatic wrap. The tank contains nitrogen at 2 bar and 300 K. This tank is connected to a piping by which more N2 (at 300 K) is ...
332 views

When calculating a force, why do I get different result when I try to calculate via torque vs via sum of forces at an axis?

If I just do it by writing that the sum on y axis is 0 I get $100+x=200$ $x=100$ If I try torque around the top: $x*800=200*500$ $x=125$ So what am I doing wrong?
16 views

How are (portable) oxygen concentrators made? [on hold]

I'm wondering how machines like the Philips Simply Go™️ and other oxygen compressors are made and how they work. Can someone explain the working of it?
10 views

What is the effect of different ways to adding liquid materials into a mixing tank?

I am working with body wash products and there is a problem happening with the mixing process. I use a 5000-liter tank to mix all the liquid materials including water, surfactant and preservatives. ...
31 views

Which force effect on the rods in this case?

As it shows in the figure i would like know which the forces will be acts on Rod A and B: Rod A F1 + F2 are only effect on it ? OR F1 + F2 + F3 + F4 of all effect on it ? And same for Rod B Rod B F3 ...
5 views

How to create RBE2 between the end edges of a cylinder and end nodes of a beam element in ANSYS APDL?

I have a cylinder with shell mesh. on its axis I have a beam with the same length of the cylinder. I want to create an RBE2 between each end edge nodes of the cylinder and the corresponding end node ...
15 views

Wouldn't placing an inductor instead of a capacitor have the same effect in fans?

A capacitor is kept in the circuit of a fan to overcome the trouble of having torques in both directions. I would like to know if the capacitor could be replaced with an inductor without resulting in ...
22 views

Why does a tractor not do wheelie with a lot of weight on the trolley?

Tractor carries more than his own weight on its trolley. The linkage between the tractor and the trolley is far away from the tractor. So, the whole weight of the trolley is on the back of the tractor....
20 views

Why doesn't the flow of current through the conductors in the rotor of a fan affect it?

The rotor of fan is shown as a series of circles arranged in a circular manner. From youtube videos, I came to know that this is sort of a top view and the circles actually represent conductors ...
11 views

Proper Flow Meter Installation

I have a 12" flow meter that uses a float on a stem and whenever gas is supplied, the initial flow spikes the float to the top and gets wedged. The flow meter is plumbed downstream of a control valve ...
14 views

I need to remove 5" x 48" of the middle of a 6"x12"x16' header so I can clear the AC units on the top of my motorhome entering the carport. The header supports a 6/12 pitch roof with trusses. What ...
44 views

From a mechanical point of view(Physics/Engineering) why are Front-Load washers said to clean/wash better than Top-Load washers on average?

Here is an example Is it just marketing or do they really clean/wash better due to some physical property or the way they work, I am asking how do they if they do? N.B I do not intend to indicate a ...
26 views

Stone vs. Stainless Steel - Weather Resistance [on hold]

Under normal atmospheric conditions in a temperate zone with hot summers and snowy winters, would stainless steel or a quality masonry stone last longer? (of course both would last long)
15 views

So if i have the first one usually you couple two rods or hang a long rod from something. But if i go to the next one i can actually use the coupler as a nut.. But when i use the next size up as a ...
14 views

What topics in control theory should I learn after classical control theory?

I've finished my controls system course at college, and I've learned all about classic control theory (root locus, PID, design via frequency response, etc.). Throughout the course, several more ...
24 views

identify shackle or swivel tensioner mechanism

What is this called? I would say it is a shackle or I suppose, a turnbuckle, but it appears to have a right threaded rod on both sides and right threaded free nuts inside. I would just say it's a ...
16 views

How to design a magnet to handle a known force?

There is a metallical structure. I can estimate how much steel are in it. I would like to know how tall/strong a magnet should be to maintain a certain object to the metallical structure. The object ...
35 views

How deep do you have to check for problems underneath a building site?

When you're putting up a new building, you have to check the soil underneath for stability. How deep do you typically have to check? What's the extent of your "due diligence" when ensuring that a ...
12 views

Formula natural frequency double wall

I started with a book (pdf see here: https://www.pdhonline.com/courses/m104/m104_new.htm) In this book there is the following formulla found $$f_0 = 170 / \sqrt{M_1 * t / (1 + M_1 / M_2)}$$. The ...
44 views

How to calculate total force of 4 hydraulic power jacks?

The area of the 4 power jacks is known and also the pressure is measured and thus known using pressure gauges on pipe from the hydraulic power pack to the jacks. The jacks are identical and each of ...
58 views

Can we build a building that could last thousands of years, if it was abandoned, in a humid continental climate? [on hold]

Can we build a building that could last thousands of years, if it was abandoned, in a humid continental climate? Is this even possible with present knowledge? How would such a structure be built? ...
18 views

200A tig welder enough to weld 8mm thick steel flat bar/stainless steel sheet/tubing

I would like a tig welder. It has to be able to weld 8mm thick steel flat bar so we can fix the front gate if it breaks. I also want to be able to do stainless and aluminium for projects. It seems ...
10 views

is there any relationship between endurance limit and tensile strength for thermoplastics?

i want to know about the relationship between fatigue strength and tensile strength for thermoplastics especially PPSU (POLYPHENYLSULPHONE)@23 DEG.
12 views

Maximising the trace of the observability Gramian

Suppose I have a matrix W. This matrix has an observability Gramian Q. Is there a way to see which changes in the matrix W will maximise the trace of Q? Is there a natural way to express maximising Q ...
15 views

What are some practical applications of nonlinear control and multivariable control in the industry?

All the books I've used in my control systems class give a definition multiple-input, multiple-output systems and nonlinear systems, but all the techniques covered in the folloing chapters apply only ...
19 views

Is learning VLSI design useful for a control/automation engineer?

I've known of a few universities that include a class about VLSI design as a part of their control/automation engineering programs. I undestand VLSI design to be about creating integrated circuits ...
23 views

What is the influence of precipitation on pavement performance in both jointed plane concrete pavements (JPCP) and asphalt concrete pavements? [on hold]

How are the integrated climatic model (http://hdl.handle.net/2142/95718), and the thornthwaite moisture index (TMI) used to calculate erosion, suction, and frost heaving in Pavement Mechanistic-...
12 views

Comparing power requirements of centrifugal pump installations

Hi, I am stuck with a question related to the centrifugal pumps. There are two centrifugal pump installations and it is asked to compare the power requirements for two installations. As in Pa>Pb or ...
15 views

Is it possible to reduce energy consumption of air separation unit by using single column rectification process?

Is it possible to reduce energy (Joule or KW) consumption of air separation unit by using single column rectification process instead of double column rectification? Is there any examples that this ...
58 views

Trouble with Valveless PulseJet

My friend and I are working on building a valveless pulsejet out of sheet metal. We initially built a small one (a few feet in length) using the below dimensions: The issue was that we were unable to ...
16 views

How can we model a full depth reclamation (FDR) layer with emulsion (wet FDR layer) in a pavement design?

So far, I have only been able to model dry layers as I've only been able to represent the FDR layer with one modulus value.
9 views

How can I use backcalculated modulus results from FWD testing to represent my existing condition using Pavement ME Design?

We only have one adjusted FWD modulus value for HMA layers, but I can only see input options in the form of a grid of frequency and temperature.
30 views

How to get an engineering job after a math PhD? [on hold]

I did my undergraduate in electrical engineering (power systems) in a foreign country. Now I am about to finish a math PhD from a low ranked school in the US. Even though I like math, I wished I had ...
51 views

Is it economical to use solar energy to manufacture solar panels?

Estimates of area needed to be covered by solar panels to power all of the US using only solar are about equal to a 100 mile by 100 mile tract of land. But solar panels have a lifespan of only a few ...
46 views

Controller vs Micro controller?

We often listen both term in electrical engineering? First one is seen in control systems course and second one in course of embedded systems But what is difference between both of these terms?...
17 views

What kind of Research & Development can be done for Metallurgical Coke By-Products? [on hold]

On the chemical side of Blast Furnace By-Products Section: during the distillation process, a large amount of gas and smoke is generated, which –after purification– creates coke oven gas and other ...
16 views

How to connect a cable comb to a metal panel?

I have some cable combs, that looks roughly like https://images-na.ssl-images-amazon.com/images/I/71OiqN4CP1L.SL1100.jpg except with a flat bottom, cut from acrylic (ideally 5mm thick). I need to ...
17 views

Proper name for this weld adapter/sleeve/stub

I'm studying the design and construction of viewports for vacuum systems. Usually, the window is bonded to a welding ring, which is then welded to a stainless flange. (See the cross section below for ...
19 views

Feasibility of additively manufacturing large metal objects in microgravity/high vacuum (space)

This a somewhat speculative question; I would like to know whether it is feasible to additively manufacture large (>100m) metal objects - from for example aluminum alloys - in a space environment. ...
32 views

Engineer without physics? [closed]

I tried understanding most of the concepts about electricity,thermodynamics,mechanics and most of them were easier to understand but the rest not so easy.Is that possible?I tried solving every problem ...
23 views

Inertial Forces while analysing forces on a Piston in a Slider - Crank Mechanism?

I get that we are analysing the Piston in a non-inertial frame of reference, but the point of my question is that according to D'Alembert's Principle, whenever an inertial force comes in the line of ...
23 views

Is it possible to do purification of Sodium Sulphate and which companies do this? [duplicate]

If Sinter filter generates lots of Sodium Sulphate and then is there a way to make purification of this and which companies are already do this process?
47 views

Why do Blast Furnace flue dust generates high rates of Zn (Zinc)?

The Blast Furnace flue dust contains high rates of Zn (Zinc). I'd like to know the reason behind this. The chemical reaction of Zn inside blast furnace dust. Why it's rates becoming high?
19 views

Temperature logging of li-ion cells

I'm looking to measure and log the surface temperature of lithium ion cells (cylindrical and pouch). I tried using LM35 sensors with an Arduino, but, the drift was too much somehow. Any suggestions on ...
18 views

light switch doesnt turn off lights [migrated]

I just recently installed a lightswitch. It's not a dimmer switch, so theres just an off and on. Now, the lights are constantly on! When I turn the lightswitch off, they dim slightly, and when I turn ...