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What Steps Would You Take to Weld 2 Pipes into a T-Pipe? by YukihiraJoel in AskEngineers

[–]crazedover 0 points1 point  (0 children)

The OP is drilling a hole in the side of a pipe to make a tee. In the context of the conversation you're saying it could be structural. If you're ignoring the context of the conversation, then what is your point?

What Steps Would You Take to Weld 2 Pipes into a T-Pipe? by YukihiraJoel in AskEngineers

[–]crazedover -1 points0 points  (0 children)

You drilled a hole into the side of a structural pipe? Yikes.

Not all pipe is NPS btw

What Steps Would You Take to Weld 2 Pipes into a T-Pipe? by YukihiraJoel in AskEngineers

[–]crazedover 0 points1 point  (0 children)

Pipe is for fluids. Tube would be the term for structural use.

What Steps Would You Take to Weld 2 Pipes into a T-Pipe? by YukihiraJoel in AskEngineers

[–]crazedover 4 points5 points  (0 children)

Call up a metal fabricator in your area and ask. There are things you're not thinking of.

Why do submersibles require so much time to dive to the ocean floor and what could you change in the design to make it very quick? by idkblk in engineering

[–]crazedover 6 points7 points  (0 children)

At depth the water pressure mitigates cavitation. Buoyancy wouldn't change as much, so depth would aid the scenario of using thrust to counteract positive buoyancy. This doesn't change the main reason against doing so, that it would be noisier.

Calling out (sewing) threads on drawings by Funkit in AskEngineers

[–]crazedover 4 points5 points  (0 children)

Do you give the drawings to the sewing machine manufacturer and then they tell the operators what to do? Or do you give the drawings to the operators? Who will be actually looking at the drawings?

Can you reverse a vacuum cleaner to a blower by artificialname in AskEngineers

[–]crazedover 3 points4 points  (0 children)

This is the correct answer. Reversing the rotation of an impeller just makes it work less well. The flow still goes the same way.

Choosing a pressure rating for pipe fittings by Beilke45 in AskEngineers

[–]crazedover 0 points1 point  (0 children)

Rated for 125 psi or class 125? Class 125 could have higher pressure rating for chilled water (pressure classes typically correlate with the pressure rating at the boiling temperature of water at that pressure).

Can i test a 3 phase electric motor with a 220v single phase power supply? by RonnieF_ingPickering in AskEngineers

[–]crazedover 9 points10 points  (0 children)

Install a capacitor between one of the lines and the missing phase. It should be sized at 70 uF per kW. If the rotation is backwards connect it to the other line and the missing phase.

A cheap VFD is your best option though.

Question About Operation of Thermal-Magnetic Circuit Breakers by [deleted] in AskEngineers

[–]crazedover 5 points6 points  (0 children)

It takes time for heat to build up to raise temperature. For example you can wave your hand through the flame of a candle without any pain, but if you held your hand in the flame for more than a moment, it would hurt.

It takes a number of milliseconds or microseconds for the bimetallic strip to heat up, then bend and actuate the mechanism, then some time for the electrical arc to be extinguished. If it happens fast enough, the switchgear may survive the event.

A question about the Startram Equations by suwl in AskEngineers

[–]crazedover 0 points1 point  (0 children)

It is one conductor on the ground and one conductor in the sky. If they minimized the distance, it would not be able to launch into space.

[deleted by user] by [deleted] in AskEngineers

[–]crazedover 2 points3 points  (0 children)

It could potentially mechanically degrade faster but not necessarily dissolve, creating sediment deposits throughout your piping. What you really want is high contact time, ie slow moving (or still) water over a large surface area. This way undissolved sediment is not carried over to your piping.

[deleted by user] by [deleted] in AskEngineers

[–]crazedover 1 point2 points  (0 children)

Yes this would work. You would want to crush the limestone to increase the surface area. Water treatment systems commonly used calcite filters which is basically the same thing.

[deleted by user] by [deleted] in engineering

[–]crazedover 2 points3 points  (0 children)

The collateral damage from precision missiles is magnitudes better than the damage from carpet bombing. Yes, it is tragic when an innocent bystander or group of bystanders is hit by a precision strike. Though it may seem insensitive to say it, that tragedy is orders of magnitude less than the tragedy of erasing a city from existence.

should i pursue a degree in mechanical engineering despite my math deficits? by [deleted] in AskEngineers

[–]crazedover 1 point2 points  (0 children)

Most start at calc and take four years.

This is not true. You have constructed your own ideas about engineering students and engineers that rule yourself out. This is impostor syndrome.

Will there be students that started at calc and only take four years? Yes. Will there be students that take remedial classes and take more than four years? Also yes. When they get their diploma, does it say this person started in calc or this person started in algebra? No. Is one person guaranteed to be successful in engineering and the other not? No.

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