# All Questions

8,536 questions
Filter by
Sorted by
Tagged with
22 views

### What's the term for interchanging a frequently used machine with a seldomly used one?

I'm trying to find out the term used for the practice of interchanging/relocating/swapping 2 machines to compensate the wear and tear caused by the operation frequency differences between them. This ...
129 views

### What is diffusion in the context of compressor?

When studying about the axial compressor, I came across the term 'diffusion' being used to explain the conversion of kinetic energy to pressure, also terms like 'diffusion factor'. What is being ...
31 views

### Moment of Inertia

To calculate the moment of inertia at o, I tried to apply (1/3mq^2) but I am not sure if it is correct. Any help would be appreciated.
10 views

### Will expanding metal disrupt my motion sensor?

I am trying to install a door motion sensor in a environment that will get very hot for our work. So the door could heat up to temperature of 150-200°F. We built the frames and door to handle the ...
28 views

Hello I was searching net but can find information. I am doing a hobbyist project. I would like use shaft with metric triangular thread as a leadscrew. Can I do that? I know ACME will be loads better ...
16 views

### U tube manometer problems

A U-tube containing mercury is used to measure the pressure of an oil of specific gravity 0.8 as shown in Fig. 2.43. Calculate the pressure of the oil, if the difference of mercury level be 0.5 m.
41 views

### What is the idea behind an expansion valve?

I am watching this video(https://www.youtube.com/watch?v=gVLhrLTF878) and beginning at around the 2:20 mark, it explains the significance of an expansion valve with the following ideas: Restricts ...
25 views

### How could I automatically agitate water by blowing warm air over its surface?

I want to increase the evaporation rate in a tank by blowing warm air over the surface of the water in the tank; this will (hopefully) agitate the water, increase the airflow in the tank, and maybe ...
25 views

### Do crank-sliders require some minimum amount of momentum to work in linear-to-rotary convertions?

I've been doing some reading into spinning wheels and old-fashioned sewing machines and so far as I can tell, they use a system similar to a piston in an engine. The main difference being, the ...
35 views

### Is there a linkage or other mechanism which can simulate a pivot, without extending that far?

I have a bar which I want to move as if it was pivoted on a point beyond its end. e.g. -------- * / / / / Is there a ...
34 views

### Why are parts of a cylinder closer to centre elongated less during torsion?

Say we have a fixed cylinder with a radius of $R$. Looking at any cross-section, the shear stress at a radius ($r$) is given by $\tau = G \gamma$. I understand that the particles at the outer radius ...
51 views

### Question About Pumps in Series

I have a circulation tank that runs a piping loop out and back in with a motor pump on it to keep fluid constantly agitated in it. I want to add an inlet to the tank, so I can fill it without pouring ...
22 views

### what design features allow a milling machine to withstand lateral pressures against the bit

I need to cut a slot 4mm wide by 25mm long in aluminum tube with a 2.2mm wall thickness and a 35mm O.D. The tube is 250mm in length. It seemed a drill press with a fluting bit might suffice for this ...
21 views

### In oxidising roasting why phosphorus can't oxidising?

In the sinter process of oxidising roasting, why phosphorus can't oxidising?
28 views

### 1m3 water container and ice damage prevention

I was looking for data on ice resistance for these kinds of 1000 litres containers. I believe they are made of polyethylene with an outside aluminium structure. Given the physics of ice expansion, ...
22 views

### Effect of annealing on the defects

What is the effect of annealing on the defects present in the sample? Does it remove defects in the sample? Is there any chance that due to annealing the point defects present in the sample combine to ...
14 views

### Given a known relation between the saturation pressure and temperature of an unspecified metal, how can we determine the following properties?

This problem contains multiple parts, and I will write my initial attempts at solving the problem under it's corresponding section If we're given that the vapor pressures (described in Atm) of both ...
57 views

### 2D- Truss Member Analysis

I am a graduate student trying to sharpen the direct stiffness method skills. However, I am stuck at the beginning. The problem is given in the image. Can someone help me to write down all the nodal ...
15 views

### How to calculate flow coefficient to choose a pressure regulator

I'm attempting to choose a pressure regulator(for use with an inert gas) for a personal project I am working on. I know that the inlet pressure will be 2000 psi and outlet pressure of 300 psi. I also ...
34 views

### What is the rationale for a 6x6 truck chassis with 2 axles front vs. 6x6 chassis with 2 axles rear?

What is the rational for these two different 6x6 truck chassis arrangements? Is it merely a matter of intended distribution of weight across the chassis while in use? As in, two axles up front to ...
19 views

### Ethernet to serial converter using TM4C129EXL

I need help regarding the lwip stack with tiva c, I am building UDP to serial converter, the function is working correctly, but I have some concerns: When I receive the UDP packet buffer, I directly ...
20 views

### What is the top limit for torque per diameter ratio for electrical rotation mechanism working in a tube?

Use case: industrial stop valve placed in an another pipe welded perpendicularly making a T-shape. To make the question more specific let's consider 50mm inner diameter pipe for the linear actuator ...
8 views

### Line of sight to satellite antenna

If I have the ECEF location of a satellite ground station and the beam width, how can I determine if an antenna on a satellite is within range of the ground station? I have the ECEF position of the ...
23 views

### Measuring shaft torque of a small motor

I would like to determine the mechanical output torque and power of a small motor without using expensive strain guages and similar and have come up with the idea of determining the maximum mass that ...
28 views

### Ductility of Fe-Ni Alloy

Cold worked Fe-Ni rod is very brittle and not suitable for drawing. What would be the best heat treatment parameters for increasing the ductility of a Fe-Ni Alloy? Does increase in the Co content make ...
36 views

### what means Probablity of event excedence of so many years

I like to know about occurrence of earthquake events when we say that earthquake of 0.5 g will occur in 50 years in excedence of.
36 views

I'm pursuing Mechanical Engineering and i need to learn AUTOCAD, is there any site where i can download free video tutorials
60 views

### Heat Exchangers

LMTD of a counter flow heat exchanger is 20°C and cold fluid enters at 20°c & hot fluid at 100°C, mass flow rate of cold fluid is twice that of mass flow rate of hot fluid. $C_p$ of hot fluid is ...
28 views

### Does the quality of a microphone affect the frequency and intensity(dB) of the sound it can pick up?

Does the quality of a microphone affect the frequency and intensity(dB) of the sound it can pick up? Do all microphones pick up sound as it is in real life?
24 views

### Finite Element software for chemical diffusion in liquid

I'm an engineer who needs to do FEA for the first time. I need to model chemical diffusion in a liquid in a container with specific geometry. For now fluid is assumed to be not flowing. What ...
38 views

### Is there a standard for where treelines are drawn?

On surveys and site plans, I've often found treelines. These look like the below image, and serve to delineate in a very approximate way the areas full of trees and those that aren't: Is there a ...
11 views

### Does Pavement ME Design output the tensile strain beneath an AC layer?

I'd like to know the tensile strain beneath the asphalt concrete (AC) layer in my design structure. Usually, the strain is used to calculate the number of axles (Nf) that the pavement structure can ...
35 views

### installing swing hook before concrete is poured

I want to place a swing hooks in place before the concrete is poured so that , i dont have to drill a hole later. My contractor is not ready to make these bolts with TMT bars itself.. what kind of ...
9 views

### How to get version from an abaqus output database file?

I want to read some data from an .odb file, but when I open it using the C++ API I always get this error message: file.odb is from a more recent release of Abaqus. The current Abaqus ...
8 views

### Sources on SA:V ratio

I have done a fair bit of research but I just dont understand whats the importance of SA:V ratio in terms of physics. There are some articles talking about thermal energy transfer, but most of the ...
32 views

### Is is possible to form a 3D object from the front, side, top views with a triangle, a square and a circle respectively?

A friend of mine asked me this question, but I don't know if it is possible or not. If it is possible, please show me how to construct it. If it is not possible, please prove it. Thanks.
35 views

### What plastic material is best for a snap-fit design?

I'm designing a plastic holder that will secure a metal part with snaps. Which plastic will be able to take multiple removals and re-insertions without getting weaker (bent out of shape) over time? [...
33 views

### What type of engineer/professional designs hydroponic farms?

What kind of professional/architect/engineer builds agricultural systems, specifically automated hydroponic systems? Things such as growing, cultivation, lighting, plumbing, harvesting, processing ...
67 views

### NASCAR corners on public roads

Why don't engineers build highways with corners such those on NASCAR speedways?
14 views

### Phrase to describe products that meet “test for” standards?

Often in the case of safety related products - My example is EN54 Fire detection and fire alarm systems. For a product to say that they comply with this standard, the product has to be tested and ...
16 views

### At which stage can borate solutions be injected to metallurgical coke?

Borates are effective to increase CSR of metallurgical cokes so that can be added to the metallurgical coke in the process, which place is best for this belching process? Coke ovens? Coke ovens (...
27 views

### Mounting an antenna base on a roof using only double sided tape?

I want to put a vertical antenna on top of my roof. The antenna is basically 4 meters of PVC pipe and 5 meters of 19mm aluminium tubing. The roof at my house is corrugated sheet metal, and I want to ...
17 views

### Determining the minimal needed wall thickness between two bores in a control block

Given a control block of simplicity with only two bores. These two bores could be parallel or just could be very close to each other at a specific point in the control block. The material of the ...
32 views

### Why do we analyse frequency response for step inputs?

In my class I'm in, our lecturer presented frequency response methods such as the nyquist plot and bode diagrams. Then when designing a lead compensator later, he said one of the specifications should ...
30 views

### Why do pitching machines use wheels and not solenoids, actuators, servos or peumatic cylenders?

I guess that generating movement is harder then keeping a wheel rolling, but in terms of power consumption is it possible to compare the power consumption of a motor for driving wheels to that of a ...
37 views

### What is the manufacturing method used to make aluminium C channel

I don't know how this is made and I don't know the name of the method to search for it to learn more.
39 views

Most of finite element calculations are performed with an orthogonal mesh (Cartesian coordinate system). From this calculation, we get two values of required steel area per linear meter: $Ax, Ay$ (\$cm^...
42 views

### How much rain water run off do I need to power an LED greenhouse

My question essentially is how much water to power green house LED lights. Specifics bellow : Say I have a warehouse with a flat roof with a bunch of water tanks or the whole thing being a water tank....