| Subject | Date Asked | Expert |
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| rubber, recycling | 6/8/2005 | Pat March |
Q: We're drowning in used tennis balls. Recycling centers don't accept them. Do you think they could ...
A: I am surprised that recyclers don't accept these. Why? Using them as insulation is a novel idea, ...
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| starting air compressor of diesel generator | 5/14/2005 | Al Hall |
Q: Our diesel generator have an an auxilliary of air starting compressor, is this air starting ...
A: I am not familiar with your specific system, but if I understand your question correctly, I do not ...
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| science fair project | 4/1/2005 | Pat March |
Q: My son is in 4th grade and wants to do a science fair project dealing with gears. Do you have any ...
A: Howdy Susan, Gears come in many varieties. Basic gears are called spur gears. There are also ...
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| engineering materials | 3/31/2005 | Pat March |
Q: how and what materials can be a alloyed with basic steel to produce special steels like stainless ...
A: By basic steel I assume you mean ordinary carbon steel, not steel made by the basic process. ...
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| in the centrifugal pump :
what... | 3/25/2005 | Al Hall |
Q: in the centrifugal pump : what is happen for the pressure and motor shaft if we colse the delivery ...
A: If the pump outlet is closed so there is no flow from the pump, then the pressure at the outlet ...
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| pressure gauges | 3/18/2005 | Kalyanasundaram R |
Q: Sir: Thanx for the answer last time. Follow-up to my question, what is the difference if there is ...
A: For the same (Quality) class of gauge, there will be no difference in actual reading within the ...
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| power plants | 3/12/2005 | Al Hall |
Q: what is the most efficient power plant operating today? Is it hydro, coal fired, geothermal or ...
A: The most efficient power plants operating today are fuel cells, as some are capable of efficiencies ...
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| pressure gauges | 3/12/2005 | Kalyanasundaram R |
Q: why is it that our pressure gauges have oil or water inside the gauge itself? what is its purpose?
A: First the pressure gauges (Bourdon type) DO NOT have any liquid inside. If you have opened from an ...
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| hydraulics | 3/5/2005 | Al Hall |
Q: can you give me a good definition of hydraulics?
A: I found a very good answer to your question in the Yahoo Dictionary. It reads: hy·drau·lics ...
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| overhead projector | 2/22/2005 | Kalyanasundaram R |
Q: how does a overhead projector work and how do you make one ( for a science project) hope you can ...
A: The working of Overhead projector is explained in a simple way. You have a uniform light source ...
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| Mechanical Engineering School Project | 2/13/2005 | Kalyanasundaram R |
Q: I am a mechanical enginnering student at Florida International University, Miami. I have to find a ...
A: My suggestion is that nuts and bolts are not the products to be taken for improvements.Because there ...
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| Science | 2/1/2005 | Pat March |
Q: Me again! Can you please help me answer this problem? A steel block has a volume of 0.08 m^3 and a ...
A: Howdy, Me Again! 1. The weight in water is the same as the weight in air. The scale will read ...
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| How would you design my invention | 1/21/2005 | Kalyanasundaram R |
Q: How would you design a machine or simple machine that would open soda cans. Also tell me what ...
A: Before suggesting the gadget or machine, I would like to know some details about the various cans to ...
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| Pump | 1/21/2005 | Pat March |
Q: Q1. Suppose the groundwater level in a well is 20m below the ground surface. Can the groundwater be ...
A: Q1 No. Suction only works as far as atmospheric pressure lets it. At sea level this is about 10 ...
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| Query | 1/16/2005 | Kalyanasundaram R |
Q: I am interested in Lipstick and similar products manufacturing. I want best automatic machines ...
A: are you interested in making lipstick (wax rods) or put it in a container as we get in the market? ...
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| an egg catcher | 1/14/2005 | Pat March |
Q: in my physics class we have to do an experiment of designing a egg catcher. This egg catcher can ...
A: Howdy Matt, Your problem is to cushion the impact of a falling egg do that it does not crack. You ...
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| an egg catcher | 1/14/2005 | Kalyanasundaram R |
Q: in my physics class we have to do an experiment of designing a egg catcher. This egg catcher can ...
A: The simplest catcher will be like a mini tennis racket. You can use the cross stitch frame of 6" ...
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| careers | 1/14/2005 | Aroosh Shahbazian |
Q: my name is Carl and I'm a student from Cass City Middle School. In my career pathways class I am ...
A: Math and physics and computer science could be the answer to your first question. Mechanical ...
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| Trebuchet, Science Fair Projects | 1/12/2005 | Pat March |
Q: I am starting a science fair project about trebuchets. I found out about this sight from ...
A: Trebuchets were not precision devices! Changing direction would be done by prying the whole machine ...
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| heat transfer | 1/12/2005 | Pat March |
Q: I have a system of pipes exposed to 10 degrees F. the 3900 LF of pipe is 1/2" galvanized and lies ...
A: Doug: You ask tough questions! Lets see if I can cook up an approach to the problem. First, you ...
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| electro static generator | 1/4/2005 | Al Hall |
Q: im ina science fair and i need to biuld a high school grade static electricity generator. how do i ...
A: In answer to your question, I want to say that electric generation involves much complex electrical ...
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| cnc | 1/2/2005 | Aroosh Shahbazian |
Q: some days ego i send you an email and ask you about my question but i couidnt get my answer all i ...
A: Habibnejad I'm not aware of such web site, but here you go, I hope this sample program will help ...
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| cnc programing | 12/28/2004 | Aroosh Shahbazian |
Q: i am a student of mechanical enginearing and have search diffrent sites about cnc programing for ...
A: Habibnejad The CNC programs are made to fit a specific machine, if there is no machine parameters, ...
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| hp required in woodworking table saws | 12/24/2004 | Pat March |
Q: One more question if you will permit me to take a moment of your time. I also build layouts for ...
A: Merry Christmas Jay, The answer is that using the right bolts or right rivets (and enough of them) ...
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| thermal | 12/24/2004 | Al Hall |
Q: what is meant by cc? why CI engines are more costlier than SI engines?
A: Your question is too vague for me to be certian of the answer, so I will answer what comes to mind: ...
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| hp required in woodworking table saws | 12/23/2004 | Pat March |
Q: I teach under-privledged children basic woodworking after school. Some of my kids have enormous ...
A: Howdy Jay, You ask tough questions! After some thought I conclude that blade and motor momentum ...
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| Physics in Mechanial Engineering | 12/17/2004 | Al Hall |
Q: I'm doing a research project on this subject and was wondering if you could tell me more, or perhaps ...
A: I would recommend that you spend some time in the Mechanical Engineering library at your college ...
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| oil | 11/23/2004 | Al Hall |
Q: What dose 10w-40 motor oil do to or in a motor? I know it lubricates the pistons by dispersing in ...
A: You are correct. Motor oil in an engine lubricates the internal mechanical parts such as cylinder ...
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| fan blades | 11/22/2004 | Pat March |
Q: I have a bike trainer that uses your own bike for cardiovascular fitness. The back tire is lifted ...
A: It is nice to communicate with someone who actually DOES things for a change. I cannot tell what is ...
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| Propellers | 11/21/2004 | Pat March |
Q: You seem to have a knowledge for fans. How does a propeller work?
A: A propeller can be regarded as twisted wings mounted on a shaft. As the shaft rotates, the wings ...
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| back pressure in a power plant | 10/26/2004 | Al Hall |
Q: how we can define "back pressure"in a power plant(steam turbine electrical power plant) and how it ...
A: 1) Back pressure can be defined as the pressure applied at the steam discharge, or exit point, of a ...
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| Rigidity & Stiffness | 10/25/2004 | Kalyanasundaram R |
Q: Kalyanasundaram, Pretty nice meeting u. As a preamble i am krishnathejan akumalla doing my masters ...
A: there is wafer thin difference between the two terms. What I think is rigidity is the resistance ...
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| design | 10/23/2004 | Rick Bolton |
Q: sir, how can we eradicate steel balls of different sizes &dimensions
A: V.Kiran Kumar, There are many ways to eliminate (eradicate) steel balls. Since the weight varies by ...
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| mechanics - force analysis on jib of crane | 10/4/2004 | Al Hall |
Q: mechanics - force analysis on jib of crane
A: This is a simple statics problem. The answer lies in the construction of a diagram of the object ...
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| MECHANICAL ENGINEERING | 9/27/2004 | Pat March |
Q: When tension is exerted on a given weight at 45 degrees, the weight is doubled. What is the formula ...
A: The force is not doubled. Each rope carries its share. The technique used is summation of forces. ...
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| Blower | 9/20/2004 | Pat March |
Q: Knowing the impeller diameter(24"), width (4.5"), and speed(4500 RPM). Knowing the Duct opening ...
A: You can't. The information you provide is inadequate. I would need the complete design including eye ...
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| straw structures | 9/9/2004 | Pat March |
Q: Recently I have tried to build a straw structure out of nothing but straws and glue and tape. I am ...
A: So you must build a 30 inch tower out of straws and tape with glue? Is this correct? I assume the ...
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| science fair | 9/9/2004 | Pat March |
Q: i am doing a project on mechanical advantage of simple machines. so far i have the lever, screw, ...
A: Howdy Jim, You have listed ALL of the simple machines. The screw is a variant of the wedge or ...
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| Ferris Wheel | 9/7/2004 | Pat March |
Q: Pat,I am building a 12' diameter Ferris Wheel. It will be motorized. I would like it to be lighted. ...
A: Howdy Gary, Your problem is how to safely conduct electricity through a rotating joint???? This ...
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| Designing Jigs& fixtures | 9/4/2004 | Rick Bolton |
Q: I need to study about the concepts of designing jigs & fixtures thru internet. Pl. suggest some ...
A: Devendra, Sometimes info can be obtained from the internet but for jigs and fixtures I don't think ...
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