Sunday Morning Quiz

[Michael GilliganParticipant @michaelgilligan61133]

I already know … so this is just for your amusement:

Where would you find a pressure gauge with calibrations like this ?

MichaelG.

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[noel shelleyParticipant @noelshelley55608]

Anything where increased suction or depression was a problem ! I fitted one to the fuel supply of my car (for reasons I won’t bore you with) to indicate when the fuel filter was restricting fuel flow and needed changing.

Refrigeration or a heat pump ? Noel.

[Robert Atkinson 2Participant @robertatkinson2]

I don’t know. Can’t think of anything where a differential of more than minus 5 PSI is “safe” compared to zero differental. It it was mmH2O it might have been a fume cabinet or similar where you don’t want something leaking out…

Robert.

[SillyOldDufferModerator @sillyoldduffer]

Chemical process maybe?  Certain sensitive substances are made by evaporating solvents in a vacuum.  The vacuum considerably reduces the temperature needed.    If the vacuum failed, the temperature might rise, causing an uncontrolled thermal runaway as the substance decomposed.  Bang!

Or a vacuum brake: don’t drive off until the vacuum is strong enough to release the brake.  Dangerous to the machine, not humans.

Odd!

Dave

 

 

[Maurice TaylorParticipant @mauricetaylor82093]

Hi, Testing advance and retard on petrol engine also brake bleeding on cars using hand held vacuum pump .Look on eBay .

Maurice

[Martin ConnellyParticipant @martinconnelly55370]

How about on those rubber suction devices Tom Cruise uses to climb modern glass faced buildings in Mission Impossible? Loss of suction there would not be a great outcome for the character in the film.

Martin C

[peak4Participant @peak4]

Looks a bit too cheap to be medical; have you had a new windscreen fitted?

Bill

[Michael GilliganParticipant @michaelgilligan61133]

Martin and Bill are near enough

MichaelG.

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[Ches Green UKParticipant @chesgreenuk]

That was good fun.

I wouldn’t complain if it became a regular Sunday quiz 🙂

Ches

[jimmy bParticipant @jimmyb]

Nice one.

 

I did guess vacuum, but couldn’t think of an application.

 

I agree with Ches, this would make a good regular feature.

 

Thank you.

 

jimb

[Nicholas FarrParticipant @nicholasfarr14254]

Hi, where I used to work many years ago, they had a 20 foot in diameter table, with perforated slots upon which woven Nylon cloths were were fitted, washed industrial sand was then pumped onto a selected area, as the table was turning at less than walking pace. Below the table were four 12″ diameter steel pipes, which were connected to four separated sections of and interface section to the table, The four pipes were connected together and lead to a large round chamber, which was connected to another chamber of the same size in series, which was on the same floor as the table, and this one was connected to a large very powerful vacuum pump. As the table was turning, the Vacuum pump would suck the water from the sand to an extent to be just moist. The second chamber had a vacuum gauge connected near its outlet, but this one had markings up 32 inch’s. If I remember correct, this system would turn up to about 80 Tonnes of really wet sand an hour into moist sand for storage, some of which would be kilned bone dry.

Regards Nick.

[Nigel Graham 2Participant @nigelgraham2]

I’m intrigued by the warning on the illustration.

What sort of “ash” do the manufacturers think might cause it problems?

[Nigel Graham 2]

On Nigel Graham 2 Said:

I’m intrigued by the warning on the illustration.

What sort of “ash” do the manufacturers think might cause it problems?

Probably the generic sort that clogs-up, or wears-out pumps

… How are you at drawing Chinese ?

MichaelG.

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