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couple
In mechanics, a couple is a system of forces with a resultant (a.k.a. net or sum) moment but no resultant force.A better term is force couple or pure moment. Its effect is to create rotation without translation. In rigid body mechanics, force couples are free vectors, meaning their effects on a body are independent of the point of application.
The resultant moment of a couple is called a torque. This is not to be confused with the term torque as it is used in physics, where it is merely a synonym of moment. Instead, torque is a special case of moment. Torque has special properties that moment does not have, in particular the property of being independent of reference point, as described below.
Hi a couple of questions...
I was wondering has anyone joined a 'find a tradesman' :crazy: web site and was it worth it? I've seen a few now, some you pay for leads, others, you pay one of, and some arepay monthly....BUT do they work?
The other thing is has any one done any manufacturers UFH...
Hi, my name is Tim,
I am currently trading as a self employed Plumber, based in Poole, Dorset, looking to gain my ACS qualification. The trouble is that I have no one to work alongside to learn from.
I gained my City & Guilds 6128/01 L2 in Heating and Ventilation around 18 months ago and also...
Am i doinfg this right ?
when installing a mt10 rf stat and reciever on worcesters do i leave or remove the link ?
I ask this as suddenly had a batch come back to me after installing these types of stats .
gaspastemania
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after
couple
installing
leave
mechanical
mt10
remove
Hello all,
I am new to this forum, and I am hoping someone can help.
We have a Elson Diamond double feed indirect hot water unit, and we have had the hot water and heating running fine for the last couple of weeks, however the other night, something has gone wrong and we only now have central...
Gilbo1
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couple
diamond
heating
hot
hot water
no hot water
pipes
water
Hi
Been to a house where they are having trouble with two upstairs radiators both with TRV valves.
Both radiators have the bleed screw facing the wall, so tricky to get at. The radiator key just turns around the screw with no effect, have tried three different radiator keys and a angled pair...
I've a Keston C36, 4 years old and had nothing but problems with it, almost from day 1. Last week I had the pcb replaced, the ignitor rod and a couple of other bits and pieces as it wouldn't ignite. It was ok for a couple of days now, when there is a demand for water, it ignites, the water warms...
I was working with a friend over the last few days as he needed a hand. Today, we were having a cup of tea and a digestive, (we'd finished the good ones and this was all the customer had left). The customer came into the garden and joined us.
After a few minutes of friendly banter, she looked...
I have been asked to re-connect a inset gas fire today, the landlord sent me a couple of photos and from them I could see a couple of NCS's, what are the requirements for re-connection? Do the NCS's need to be rectified first? The fire was disconnected by the previous tenant to stop her son from...
This is just a long shot... But can anyone help me find a thermo couple for a Robinson Willey Belvedere RS LPG fire? RW say it's obsolete although the fire is only five years old. Any ideas where I could find one?? Failing that - is it possible that an alternative part might work. I don't...
as said in a previous post i'm on a mission to get gsr and i will no doubt have plenty of questions (some of them stupid) beginning now....
1) is it a legal requirement to register gas installs with gas safe in england?? (i know from a thread i read a while back that you don't in scotland)
2)...
Hi am nearly finished on tech cert level2 and looking at buying own tools.Need a list of tools for working as plumbers mate or possible self employment can anyone giv me any ideas.Looking at mid price quality maybe Rothenburger.?
A married couple went to the hospital to have their baby delivered. Upon their arrival, the doctor said he had invented a new machine that would transfer a portion of the mother's labour pain to the baby's father. He asked if they were willing to try it out. They were both very much in favor of...
Hi y'all,
I have my hot water set to heat up twice a day and I've noticed that my boiler (not a combi) fires up, heats the water as it should but cuts out after only a minute or so. Is this a sign that the internal thermostat is knackered or could it be something to do with the stat on the tank...
andyf3050
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after
boiler
couple
cutting
cutting out
firing
minutes
oil
for the boiler blokes.....
1) am i right in thinking that irrespective of the kw rating of a boiler there is a limit to the btu's that any given rad can emit???
2) condensate termination - got to fit a bathroom and currently its a shell but beneath where the bath will be is a condensate pipe...
Hi.
I need a GSR plumber to do some small changes to gas pipework & MCW.
Work will need to be done at weekend or weekday evening.
This is in an empty (refurbishment) domestic property.
Please reply if you are interested.
Cheers
Mr Lawley said Mr and Mrs Moody had smelled gas and went searching for the source of the leak
This is Grimsby | Nettleton gas blast couple treated for burns after roof lifted from home
First of all with this being my first post il start by saying hi to everyone and tell you a bit about me.
My names phil and im 23 years old and up until around march this year i had been in a steady job with a local company for around 5 years installing mainly heating systems from standard...
phil111188
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above
being
couple
design
floor
heating
questions
ufh
under floor heating
underfloor
underfloor heating
Hi, I am just looking for some advice on behalf of my 100 and 97 year old aunt and uncle. Their four year old immersion heater has been leaking from underneath. At the minute that is all i know. My concern is that it has visits both today and yesterday by an unknown man (I will know more...
My question is that I have a redring pumped electric thermostatic shower which is installed. In a 2 storey house the pipework to shower is via the roofspace in which cold has separtate supply from storage tank .hot water supply to shower direct from hot water cyl my problem is on a couple of...
Smac
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cold
couple
heating
hot
pipework
pump
pumped
shower
supply
thermostat
thermostatic
water
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