CULTURAL QA 10 -2021-08
Being compilation there may be errors Q1 Whydoes a car use 12 V Dc? A1 Ben Baert Electronics enthusiast, houseis cluttered with projects Updated October 24, 2020 There are actually two parts to this question. The first is why a caruses DC power, the second is why the battery’s nominal voltage is 12V The first question is relatively easy to answer. A battery provides DCpower, and DC power is generally more useful than AC power, so there’s no needto use a bulky and expensive inverter to get AC power we don’t need anyway. The second question is a bit harder to answer. The 12Vnominal figure isa result of battery chemistry and convention, but the real question is why wearen’t using 24V or 48V or even higher voltages. Higher voltages are more efficient and thus generally more desirable.However, this is only a factor when power requirements are high. This is whythe switch was made from the 6V battery to the 12V battery somewhere in the 1950s; the powerrequirements simply became too high for a 6V battery. The advantages of higher voltage batteries are significant. You cansave money in wiring, reduce voltage drops, reduce the stress on the battery(as the current demand decreases for the same amount of power delivered), andcomponents such as relays and motor brushes last longer. There is a lot to besaid for higher voltage batteries. Too high a voltage can bring safety problems, however, and thecombination of the relatively low power demands in a car combined with thepotential safety hazard of a high voltage means that any >50V battery is pretty much out of the question for regular vehicles, butthat still doesn’t explain why we’re not seeing, say, a 48Vbattery. The first reason is that conventions die hard. If there’s no goodreason to change it, it won’t be changed. 12V has been the standard for decades and to change this standard wouldrequire a very good reason; one that simply isn’t there. The infrastructurebuilt around the 12V convention, from chargers to accessories to any electricalcar part, is simply enormous. With the advent of hybrid electric vehicles, 48v is now becoming prettystandard for the drive train, while 12v is retained for the rest of the vehicle.Many electronic components, particularly ICs, operate in the sub 5v range, andthe trend is downward as the world looks to minimise energy consumption andreduce component size. It is unlikely that the low voltage trend will reverseanytime soon. The second is that DC contact erosion is quite a significant issue athigher voltages. Contact erosion occurs when, for example, a switch goes fromthe closed to the open position. In this transition, the current will becomemore concentrated as the path becomes narrower, to the extent that it canvaporize a bit of metal every time this happens. This effect is obviously muchmore significant at higher voltages, and it would probably require an expensiveredesign of many components. This is not insurmountable in itself, but incombination with the long-standing convention and the changes it would requireto the massive infrastructure built around the 12V battery, it is probably thefinal blow to any potential change. In short, the combination of a long-standing convention with verylittle reason to change, means we’re ‘stuck’ with the 12V battery in most cars. In trucks, with higher power demands, thestandard is 24V, and many custom designs use other voltages as well, but incars, 12V is going to stick. Q2 Isokra ok to eat raw? A2 Lucia GarciaWorked at Hospitals Sun Okra is a vegetable with a unique taste but high nutritional value.Eating raw okra can absorb the nutrients of okra to the greatest extent. Okra is rich in protein, carbohydrates, cellulose, folic acid, vitaminB1, vitamin B2, vitamin C, and minerals such as selenium, calcium, iron,phosphorus, magnesium, zinc, and potassium. During the cooking process, okra will lose some vitamins. For example,if heated for 30 minutes, vitamin C will lose 40% to 50%. The mucus of okra contains natural substances similar to hormones. Thisnatural mucus has aphrodisiac effect, can increase male sexual performance andboost libido.Therefore, okra is known as the "Plant Viagra". In addition, okra contains some selenium. Adequate intake of seleniumcan prevent the formation of cancer cells, inhibit the growth of cancer cells,and reduce the risk of cancer. Okra is a low-calorie vegetable, 100 grams of okra contains only 30calories. No matter how much okra you eat, you won’t get fat. Q3 Howlong can an FIR be valid if the accused is not arrested? A3 Kanthaswamy BalasubramaniamLawyerWed No Law says accused must be arrested FIR is simply a report of an alleged offense which has to investigatedand a chargesheet filed If the Cops feel there is no case, they wont file chargesheet and issuea B report Arresting was once done only in rare cases but then when Accusedabsconded regularly and cops were taken to task again and again, they decidedto arrest all accused and send them to Judicial custody whereMAGISTRATES/Judges would grant them bail and it would no longer be the Copsheadache So accused need not be arrested technically until Cops have enoughprima facie evidence that the accused committed the crime Q4 Whyis India not using plastic notes or something durable considering how Indiansuse it in a very rough manner and more often than not they are torn? A4 Prasanna Bhalerao Please do not sharemy answers on monetised spaces.19h ago It is a good suggestion. I came across plastic notes for the very first time in Australia in1995 (there may have been plastic notes earlier there or in other countries also).It immediately struck me how we in India have to destroy soiled currency sooften. The currency paper is very expensive and imported from Switzerland (Ibelieve). Considering the longevity of plastic paper based currency, this wouldbe a big saving in the long run. Maybe there are issues that we are not aware of: Technology and machinery Plastic paper Ability to makeit as “proof” as possible All these seem frivolous and rudimentary to me. India should startplastic paper currency. Incidentally, the UK has started plastic paper currencyvery recently. They started with £5 (2018), then £10 (early 2019) and now £20(early 2020). USA does not have plastic paper currency. The Euro is alsopaper-based (or it was till 2017 at least). One thing issure - counterfeiting can be very difficult with plastic paper and it will be abit more expensive also for thecounterfeiter. Q5 Howwas your first day as an IBPS PO? A5 Pawan Gadgil Probationary Officer atPunjab National Bank (2021–present) September 28 I joined Punjab National Bank as Probationary Officer on 13nth ofSeptember at Staff Training College, Panchkula, Haryana. First day was all about document verification followed by welcome andformal introduction. I think photos will say more than what I write... Currently we are going under training for 3 weeks. It is great tobe here.I hope this inspires someone who is preparing. All the best. Q6 Howstrong is a woodpecker's peck? A6 Amy Christa Ernano Armchairornithologist; birds fascinate me Sun Woodpeckers peckwith a force of roughly 1,200 to 1,400 g's (g-force). By comparison, ahuman whacking their head with a force of 60 to 100 g's would be enough tosustain a concussion. Woodpeckershave specialized skulls, beaks, and hyoid bones that allow them to peck withthat tremendous force and not sustain any injuries to the brain.Natureis a pretty wondrous thing, isn't it? Q7 Howsmart are Indian army officers? A7 Sainyam Agrawal Student at VelloreInstitute of Technology, Vellore (2020–present)Mon The mostsmartest people I must say belong to Armed Forces. They are very intelligent and have good brains which make them very knowledgeable They are trained to dress in a proper way groom them self which iscompulsory which makes them look smart and there personality looks verycharming If you see the Indian Army officer are regarded a lot all over theworld during joint military exercise or foreign courses they tend to performvery good. When I talk about word like smart it is not just looks as they canbe very subjective but it is a overall personality which makes them so smartand intelligent Q8 Whathappens if I make a purchase of nearly 7 lac rupees in just one month with mydebit card? Is this a normal thing or will it be suspicious and the income taxdepartment will investigate? A8 Kanthaswamy Balasubramaniam LawyerMon Your PAN number is quoted on several purchases such as Cash FDs of 2Lakh plus, FDs of 10 Lakh plus, Gold of 2 Lakh plus etc etc So they may send a message that you purchased 7 Lakhs worth of productson your PAN Card. However theAlgorithm has to find a discrepancy for your transaction to be highlighted. Buying 7 LAKHS on Debit Card does not generate a discrepancy. Of course the fact that big money was credited to your A/c may generatea discrepancy if the sum is well above your average declared taxable income forthe last 3 years (Say you declare 8 LPA and you get 20–30 Lakhs credit) If you do get any such queries, its ten minutes to resolve the same Q9 Whyare soil samples required to be air dried? A9 2 Answers John Margetts , BSc Biologyfrom The Open University Answered February 5, 2020 They do not need to be but do need to be dried at a low temperature. The reason is to avoid changingthe soil while drying it. Changes that will occur is the degradationof the organic component and oxidation of the mineral content. There might evenbe volatile components in there which will evaporate. Q10 Whyare soil samples required to be air dried?……. A10 Lilian Hayball-Clarke , former AssociateProfessor BIOLOGY at University College of the Cayman Islands (2001-2009) Answered February 2, 2018 Air drying isnatural, as the soil would dry out in air normally /naturally. In an experiment, conditions are replicated to be kept as normal /natural as possible to mimic nature. The soil sample is weighed carefullybefore and after air-drying to find out what amount of water that type of soilwill hold. Q11 Whatis the best thing to eat for high blood sugar? A11 LuciaGarcia Worked atHospitals September 29 Bitter gourdis rich in nutrients, but it contains very low calories. 100 grams of bittergourd only contains 20 calories. Eating bitter gourd will notmake you fat. Bitter melon contains bitter melon saponins, whichcan not only lower blood sugar, but also stimulate insulin secretion, promotesugar decomposition, and convert excess sugar into heat. Therefore, bitter gourd is an ideal vegetable for people with high bloodsugar. In addition, bitter gourd is rich in protein,dietary fiber, vitamin C, vitamin B1, vitamin B2, niacin, carotene, andminerals such as calcium, iron, potassium, sodium, and phosphorus. Eating bitter gourd can replenisha variety of nutrients the body needs. Q12 Humansare the most intelligent species on the planet. Does that include infants? A12 Claire Jordan·Degree in biology andfolklore; programmer, shop owner, secretary on newspaper October 1 Human infantsare often more intelligent than the infants of other species, but not theadults. There are a number of groups whose adults are as intelligentas a human child of 2–4 years: parrots, corvids and butcher birds; non-humangreat apes and to a lesser extent other simian primates; raccoons, bears,hyaenas and the brightest breeds of dog/wolf; elephants; toothed whales(especially orcas); and in some respects also octopodes and cuttlefish. All the above QA are based onQuora digest to me on 07-10-2021. Quora answers need not be 100% correctanswers Compiler- R. Gopala Krishnan, 78dated 08-10-2021 -- You received this message because you are subscribed to the Google Groups "Thatha_Patty" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/thatha_patty/175318884.325265.1633649343300%40mail.yahoo.com.
