CULTURAL QA11-2021-30

BEING  A COMPILATION THERE MAY  BE ERRORS 

Q1         What is the comforttemperature in an air conditioner?

A1          Gopala Krishnan, formerAssistant General Manager 1996-2004 at 
Department of Telecom(1966-2004)Answered just now

It depends on country, season, and time. In India, in summer in southern states 
temperature ofabout 22 degree centigrade setting in night time and about 20 
degree setting inday time is comfortable. In this covid situation it is best 
not using air conditioner isbest- as far as possible

Q2         At what age is a horseconsidered old? What is the typical lifespan 
of a horse?

A2                 Susan Conner Workedas an animal cruelty investigator & 
canine specialistNov 18

These days a seniorhorse is typically one in their late teens or early 20s. 
Thelifespan of a horse is dependent on a LOT of things rather than a 
“typical”age, but on average late 20s or early 30s is not uncommon. A horse who 
has hadgood care, good nutrition, is not overweight, had good hoof care/farrier 
work,a low sugar/starch diet, annual dental exam/float, annual vaccinations 
&vet exam and as safe an environment as possible has a better chance at 
livinglonger than one without these things.

Genetics also plays a part. One of my horses that I recently lost at the ageof 
33 had great genetics. I raised her mother from a foal and that mare livedto be 
almost 34. That mare’s mother was foaling at 26 and her sire was stillbreeding 
mares in his early 30s. The mare I just lost also had a sire that wasstill 
breeding mares in his late 20s and HIS sire and dam lived to be in theirearly 
30s.

This is a photo of my mare I lost this past May. She was 33 in this pic.They 
bay in the background is 19. He acts like he’s 10.Photo not attached. 

Q3         Why does the king beenever return to the bee hive again after mating 
with the queen bee?

A3          ArthropodCentralAnswered byKen Saladin Nov 23

There’s no “kingbee.” There are drones (males) that mate with the queen in 
flight. Inthe case of honeybees (but not all bee species), the male’s genitalia 
areripped off when he mates and he falls to the ground and dies. His 
genitaliaexplode with a pop audible even to the human ear, and can be seen 
stillclinging to a newly mated female.

Newly mated queen with the genitalia (arrow) of the last male she matedwith.

Sex is a once-in-a-lifetimeoccasion for a male honeybee. Forthat matter, it’s 
once or twice in a lifetime for the queen too, but she mateswith as many as 18 
to 20 males on her maiden flight. A femme fatale, you mightsay. The arthropod 
world is full of those.

Q4         We have an undergroundwater sump. Dust and rain water get into this 
sump, How to keep the water cleanregularly? Any filters or liquids available?

A4          Deepa Nagaraj, knowsKannadaAnswered Jan 9, 2019

The initial step is to ensure that none of the outside particles to enterthe 
water tank , so thebest thing is to install a leak proof sump covers.

The best material for sump cover is stainless steel, because one of themajor 
benefit of stainless steel is that it is corrosion free. So even the rust 
particles fromthe tank covers would not affect the water inside the tank.

One of the best sump covers I have installed is Diamond Sump Cover, whichis 
leak proof and purely stainless steel. You can contact them through9448495533, 
website: 

www.diamondsumpcover.com

My note- In Chennai, the sump israised in the middle forpeople to get in and 
clean. RCC slab is provided mostly. For Ground water notgetting in sump is made 
with double brick wall thickness. Quarterly cleaning is done. 

Q5         Why did Egypt decide toban the import of 3-wheeler auto rickshaws 
from India?

A5          Bhuvana RameshwarFormerTeacher, Sat

Egypt has stopped the import of spare parts and new auto rickshaw ortok-tok 
from India. Thismeans huge loss for Bajaj Autos in India.

The tok toks were the most budget friendly means of transport for localand 
tourists in Cairo. The autos did good business transporting people from 
thecapital to the Pyramids and other places of interest 

But it also had its disadvantageslike most unemployed youth going in for the 
easy auto driving jobs, increase in crime and terrorists activities usingthe 
humble three wheelers.

This is not a sudden move as they wanted to do away with these from 2014itself. 
They wanted toclean up Cairo City and so wanted to replace the open auto 
rickshaws with themore closed type of mini passenger vans for security and 
safety of passengersand their goods. Cairo had become safe for its tourists and 
its citizens.

Q6         How long does an averagehousehold water heater take to regenerate 
hot water?

A6          Jim Trainor, nutritionsoftware developer Updated Feb 17, 2020

Here is how the physics works.

A typical domestic gas hotwater heater in North America isabout 180 litres (50 
gallon) and consumes about 11000 watts of power (40000 BTU/hour).Water is 
typicallyheated to about 50 C (120 F), and the input cold temperature 
istypically about 10 C (50 F). The specific heat of water is 4.186 J/g/C. To 
heat180 litres of water from 10 C to 50 C, using 11000 watts of heating 
powerrequires:

 ((50–10) C * 4.186 J/g/C * 180 L *1000 g/L) / (11000 J/s) = 2740 s = 45 min

To heat a full tank of fresh,cool, water would require 45 minutes.

Reheat typically occurs when the water is at around 30 C (90F). In thatcase, 
the regeneration time is:

((50–30) C * 4.186 J/g/C * 180 L * 1000 g/L) / (11000 J/s) = 1370 s = 20 min

To regenerate a typical has water heater requires about 20 minutes.

Note that electric water heaters have lower power consumption, onlyaround 4000 
watts. So the heating times would approximately double to triple.

2ND ANSWER-CraigLister, Self-Employed at HomeRemodeling & RepairAnswered Oct 
15, 2020

A common 37 to 40,000 BTU/hour water heater can raise 20 gallons (160+lbs) of 
60 degree water 60 degrees F (9600 BTUs needed) in 15 to 20 minutes IFALL HOT 
WATER FLOW STOPS. It adds 600 to 666 BTUs every minutes. If 2.25+gallons 
continue to be withdrawn every minute, the water will never heat up asthe cold 
water will absorb all of the BTUs.

3RD ANSWER-DonForcash, former EngineeringManager-Aerospace (Recently 
Retired)Answered Jan 12

Typical gas or electric residential tank hot water heaters have arecovery rate 
typically in the range of 40–60 gallons per hour. It isimpossible to use this 
kind of rating directly because the actual recovery begins as soon as the 
waterin the tank drops below the set point, even though it may not 
beperceptible to someone taking a shower. Here’s where tank size becomes 
afactor. If the tank is large enough, the temperature drop from the 
introductionof new cold water while hot water is being used, may not be 
noticeable to theuser. So recovery rates are generally used for comparison 
purposes.

Things change when tanklesshot water heaters are discussed.Those gph ratings 
can be used directly if one knows what the flow rate for yourshower is, but 
even then, the heat rate need can be affected if multipleshowers or other hot 
water use will occur at the same time.

4TH ANSWER-GeorgeKanin, former GeneralContractor at Retired (1985-2001)Answered 
Apr 19, 2020

The ’recovery time’ depends onhow much water needs heating-up, towhat 
temperature, the temperature of the replacement water and the BTU’s theheater 
is operating on.

Q7         Did people in the MiddleAges look like us?

A7          Ernest W. Adams Lived inThe United States of America (1966–1999)Nov 
21

Yes, except that they had badteeth and scars from smallpoxand other diseases 
that we can cure now. And of course their clothes, shoes, and haircuts were 
different.But physically, they were about the same. Probably their teeth would 
have beenthe most noticeable difference

Q8         Will my AC work better ifI change the filter?

A8          3answers-Gopala Krishnan, former Assistant General Manager 
1996-2004 at Departmentof Telecom (1966-2004)Answered just now

If your filter was  not cleaned forlong period, cleaning would refresh. Perfect 
working of AC depends on the amount of gas in the compressor,working of 
condensers, and input current. Above all neatness of room, Open shelves,open 
loft etc would absorb the output of the AC unit.

2nd Answer MarkLambert, Jefe of a Motorcycle Club(2008-present)Answered 4h ago

Yes. Your house air will be cleaner too. Order on a subscription, buy inbulk, 
or invest in a washable one. You may notice your e-bill go down, allother 
things being equal.

3rd answer-ArafatKhan Iti, diploma Class 12 ThPassed, 10 Pass Out 
(2015)Answered 4h ago

Filter is most important parts ofAc.

Filter cleaning after 7 day periodically.Filter change increasecooling.Filter 
change it increase fresh air level. After filter changeairconditioner are best 
work

Q9         Why don't laptops needscreen savers?

A9          Prasanna Bhalerao M. Sc.in Electronics & Physics, Fergusson 
College, PuneFri

In the days yore, we have screensavers. There weremany built-in into Windows 98 
and earlier versions. They sort of disappearedwith Windows-XP. Why?

Till early yo mid-2000, weused to have CRT monitors. Then flat screen LCD 
monitors replaced them. CRT monitors are susceptible to screen burn-in bya 
constant image. Thescreen saver protected the CRT monitors from burn-in.

LCD screens are immune to screenburn-in. Hence modern operating systems that 
run oncomputers with LCD monitors do not require screen savers. Laptops always 
have  LCD screens.

Q10              What fruits help inincreasing longevity?

A10        Lucia GarciaWorked atHospitalsSep 27

Many nutritionists believe that regular consumption of black grapes is an 
effective way to delayaging and enhance physical fitness.

Fresh black grapes are the fruitwith the most anthocyanins.

The anthocyanins of black grapes are widely found in grape skins andgrape 
seeds. The content of anthocyanins in grape skins is about 0.5%, and thecontent 
of anthocyanins in grape seeds is about 1%.

The skins and seeds of grapesare the most nutritious parts of the grape.

The anthocyanin of fresh black grapes is a natural antioxidant. Itsantioxidant 
capacity is 50 times that of vitamin E and 20 times that of vitaminC.

Anthocyanins can remove harmfulfree radicals in the body,protect cells, 
increase skin elasticity and toughness, reduce wrinkles, anddelay the body's 
aging process.

In addition, anthocyanins can also enhance the body's antioxidantcapacity and 
reduce the occurrence of oxidation reactions in the body.

Anthocyanins are theraw materials of many anti-aging health products and the 
most effectiveantioxidants found by humans

All the above QA are from  Quora website  on    29-11- 2021. 

Compiled and posted by R. Gopala krishnan ,78, former  AGM Telecom Trivandrum 
on 30-11-2021

 

 

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