CULTURAL QA 06-2023-12

Q1           Whathappens if you add another blade to an electric fan that 
already has threerotating blades?

A1           Gopala Krishnan,Former AssistantGeneral Manager 1996-2004 at 
Department of Telecom (1966–2004)0y

In a fanprovided with three blades , there is no provision to fit a 4th 
blade.So you cannot fit another blade. Then only one has to think what would 
happen.

It is a ridiculousquestion.

Q2           Whatare some interesting facts which are not commonly known?

A2           Fact sky, Answered by Krishna Kamat Fri

Paper money wasfirst invented by the Chinese in the 7th century A.D.

The Kuwaiti dinar is the strongest currency in the world.

The Iranian Rial isofficially the world's cheapest currency. This is the 
official currency ofIran.

The British pound is the world's oldest currency still inuse at around 1,200 
years old.    

There are around180 types of currency in the world used in 195 different 
nations as recognizedby the United Nations.

No one knows forsure who first invented such money, but historians believe 
metal objects were first used asmoney as early as 5,000 B.C.

Q3           Whydo airlines sometimes have empty planes despite being fully 
booked?

A3           Vishnu Ravi, Aviation Enthusiast |Content Creator 12h

Airlinesoccasionally find themselves with empty aircraft despite being fully 
booked forvarious reasons. These factors can be attributed to the principles of 
weightand balance, the protection of valuable routes, overbooking practices, 
andpassenger preferences for specific seats.

One significant consideration is the weight and balanceof the aircraft. When 
flying with a limited numberof passengers or without any at all, the airline 
must make operationaladjustments due to the principles of physics that govern 
flight. Maintaining anoptimal weight distribution is crucial for safe and 
efficient operations.

Moreover, airlines have a vested interestin protecting their slots, which refer 
to the allocated time slotson valuable routes. Even when passenger demand 
islow, airlines continue to operate flights on these routes to safeguard 
theirslots. The aviation industry engages in a high-stakes game akin tothose 
found in Las Vegas, with these slots being lucrative assets that airlinesstrive 
to retain.

Another contributing factor to empty planes is thepractice of overbooking. 

Airlines oftenoversell their flights, anticipating that some passengers may not 
show up. Thisstrategy, although risky, is employed to maximize revenue. 
However, it canresult in lost income and liabilities if too many passengers 
turn up with validtickets. To mitigate this issue, airlines rely on statistical 
data and predictive models to ensure thattheir flights are filled to capacity, 
minimizing the chances of empty seats.

Passengerpreferences also play a role in the distribution of occupancy within 
theaircraft. Seats locatedat the rear of the plane are particularly popular due 
to their proximity tolavatories. Additionally, depending on the airline's 
serviceprotocols, these seats may be among the first rows to receive 
in-flightservices and refreshments.

It is crucial to note that even if a plane appears empty onthe seat map, it may 
still be oversold. The airline may be anticipating additional passengers to 
arrive,which further emphasizes the complexity of managing flight occupancy.

In conclusion,airlines grapple with the challenge of filling their flights 
despite beingfully booked due to various factors such as weight and balance 
considerations,the protection of valuable routes, overbooking practices, and 
passenger seatpreferences. The aviation industry is a high-stakes game, where 
airlinesstrategically maneuver to maximize revenue and minimize losses. 
Understandingthese dynamics provides insight into the complexities of airline 
operations.

Q4           Howcan an electrician help with energy efficiency improvements in 
my home?

A4          Gopala Krishnan     Former Assistant General Manager 1996-2004at 
Department of Telecom (1966–2004)Just now

The answer is brief depending on Indian conditions.

Now LED tubes and bulbs are most common. Ifother type of tubes and bulbs are 
there, replacing with LED types. The LEDbulbs and tubes consume least energy.

Location of lights and bulbs. Re arranging them, useof some of the LED tubes/ 
bulbs can be reduced from switching ON.

Cleaning the tubes and bulbs. One will find morebrightness with all light and 
fans.

Using energy efficient fans and fridges.

Using the electric motors fitted for pumping water frombore wells early 
morning, a lot of power can be savedfrom using it for limited time.

Using air conditioner setting for comfortable temperaturethan very cooling, a 
lot of power consumption can be reduced

Many more arethere…

Q5           Somescientists say don't throw metal in water. Why?

A5           Raja Roy Good 26m

Throwingmetal into water is generally not recommended becauseit can lead to 
several potential risks and negative effects. Here's asimplified explanation:

1. Corrosion: Many metals, such as iron or steel,can react with water and 
undergo a process called corrosion. This means theycan gradually break down and 
deteriorate when exposed to water, leading to rustor other forms of chemical 
degradation. Corroded metals become weaker and lessstructurally stable, making 
them less useful and potentially unsafe.

2. Environmental Impact: Some metals can releaseharmful substances into the 
water when they corrode or dissolve. Thesesubstances may include toxic 
chemicals or heavy metals that can pollute thewater, harm aquatic life, and 
disrupt ecosystems. This pollution can havelong-lasting negative effects on the 
environment.

3. Safety Concerns: When metals are thrown intowater, they can create hazards 
for people nearby. For example, sharp or jaggedmetal objects may cause injuries 
if someone steps on them or comes into contactwith them. Additionally, metals 
that have been submerged in water may remainslippery even when they are 
removed, posing a risk of falls or accidents.

4. Damage to Water Systems: In certain cases,throwing metal objects into water 
can damage water infrastructure. Forinstance, metal debris can clog drainage 
systems, pipes, or pumps, leading toblockages, reduced water flow, or even 
system failures. This can result incostly repairs and inconvenience for 
communities.

Considering these reasons, it is generally advisable toavoid throwing metal 
into water to prevent corrosion, environmental harm,safety risks, and damage to 
water systems. Instead, itis recommended to dispose of metals properly or 
recycle them throughappropriate channels.Raja Roy

All the above QA are from Quora  website  on  12-06- 2023. 

Quora answers need not be 100% correct answers .

Compiled and posted by R. Gopala krishnan, on 12-06-2023

 

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