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Engineering : Recent Questions and Answers (Page 82)

Find answers to your questions about Engineering or help others by answering their Engineering questions.

Regarding automotive engine mounts

How are automotive engine mounts tuned to behave differently for different frequencies, like they are soft for high frequency low amplitude vibrations and hard for low frequency high amplitude excitations..?...

Asked on 10/03/2020 by SS4

1 answer

Mechanical vibration of objects

Do you happen to know relevant references in the literature that model the mechanical vibrations of a solid object (preferably antennas) by means of complex representations as a function of...

Asked on 10/03/2020

1 answer

Meaning of flow rate in water pump

Rated flow in the following is in conjunction with the rated lift meaning it can lift 15 meters at flow of 12 Liter/ minutes from a well? But what if...

Asked on 09/27/2020 by Jtl

1 answer

Some questions about the specific speed (Ns) of hydro turbines

So we all know the basics behind specific speed Ns of hydro-turbines. $small{mathsf{Ns = RPM x sqrt{(P)} / H^{1.25}}}$ where P is the power output...

Asked on 09/27/2020 by sithvincent

1 answer

How to add friction to a rope without using abrasion

I have a pay-out winch. It is a spool of rope that has a disk brake attached to it, so I can control the torque required to rotate the spool....

Asked on 09/25/2020 by John Henckel

2 answer

Window mounted split air conditioner

I was wondering if there are any window mounted split air conditioners in US market or anywhere else - One in which compressor and radiator hang out of the window...

Asked on 09/24/2020 by Jean

2 answer

Material selection of heating element

I am interested in heating coils which are heated using Ohmic/Joule/resistive heating - specifically, how the material for the heating coil is selected. When I read about heating coil materials...

Asked on 09/23/2020 by EddieP

3 answer

How were the tones for DTMF chosen?

In my limited engineering knowledge, and limited research skills, I couldn't find a complete answer for the reasoning behind the chosen tones for DTMF. I did find a hint that...

Asked on 09/22/2020 by natebot13

1 answer

Why Do Airborne Wind Energy Systems Use Kites And Not Balloons?

Title says it all, Why are AWE-companies like Makani spending years and millions of dollars developing drones, rather than simply using a balloon-based design? Wouldn't it be easier and faster...

Asked on 09/21/2020 by GeorgeWTrump

1 answer

Anti-Squat Force Transmission

I’m trying to understand how anti-squat works in motorcycles and how the geometry plays a major role. I don’t understand, however,...

Asked on 09/17/2020 by RedHelmet

1 answer

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