CULTURAL QA 06-2023-05

Q1           Whatis the reason that the washing machine program mode cannot be 
changed?

A1           PREETI PRABHA, Co- Founder at LaundryCafe Pvt Ltd (2013–present)22h

There could beseveral reasons why the program mode on a washing machine cannot 
be changed.Here are a few common possibilities:

Program Lock: Some washing machines have aprogram lock feature that prevents 
the program mode from being changed once thecycle has started. This is usually 
done to ensure that the selected settingsare maintained throughout the entire 
wash cycle. Check if your washing machine has a program lockfunction, and if 
it's enabled, you may need to disable it before being able tochange the program 
mode.

Cycle in Progress: If thewashing machine iscurrently running a cycle, you 
typically cannot change the program mode untilthe current cycle is completed or 
cancelled. 

Depending on thespecific model, you may need to pause or cancel the current 
cycle before beingable to select a different program mode.

Power Interruption: If there was a power interruptionwhile the washing machine 
was running, it may have caused the machine to loseits programming or memory. 
In such cases, the washing machine may revert to adefault program or lock the 
program mode until the issue is resolved. Tryresetting the machine by turning 
it off, unplugging it from the power sourcefor a few minutes, and then plugging 
it back in. This may help restore normaloperation and allow you to change the 
program mode.

Malfunction or Error: If the washing machine isexperiencing a malfunction or 
error, it may prevent you from changing theprogram mode. In such cases, an 
error code or indicator light may be displayedon the machine's control panel. 
Consult the user manual or contact themanufacturer for troubleshooting steps 
specific to your model to resolve anyerrors or malfunctions.

It's important to consult the user manual provided by themanufacturer for your 
specific washing machine model.The manual will provide detailed instructions on 
how to operate andtroubleshoot your particular machine. If you're unable to 
resolve the issue on your own,contacting the manufacturer's customer support or 
seeking assistancefrom a professional technician may be necessary.

My note- If the program is unlocked one, slightchanges in the program can be 
made , before starting the cycle. Eg- RPM,temperature etc. 

Since my Samsungwashing machine was moving much due to smooth flooring while 
working(inspite ofproviding a cushion), the engineer suggested to reduce RPM  
and demonstrated to me how to do it  BEFORE STARTING THE CYCLE.  

Q2           Whydon't helicopters take off as soon as the blades start spinning?

A2           Erika Fernandez, Experience inAviation Field10h

Helicopters areincredible machines that can fly in any direction and hover in 
place. Theyachieve this by usingtheir main rotor blades, which are long, narrow 
wings that rotate at highspeeds and generate lift and thrust. 

But whydon’t helicopters take off as soon as the blades start spinning?

The answer is that helicopters need to perform a seriesof checks and procedures 
before they can safely lift off the ground.

The average timeit takes a helicopter to get airborne can be from 2-10 minutes, 
depending onthe type, size, model, and condition of the helicopter.

The amount ofsystems check and configuration needed before the flight extends 
the periodbefore lift-off.

Some of the stepsthat a helicopter pilot needs to do before taking off are:

Turn on theelectrical system and open the fuel valve

Start the engine(s)with a key or a button

Check the ignitionsystem, the main rotor rpm governor, the radio frequencies, 
and the gauges

Wait for the engineoil temperature and pressure to reach the optimal levels

Check the flightcontrols, the hydraulic system, the navigation system, and the 
instruments

Perform a powercheck to ensure that there is enough power available for takeoff

Check the weatherconditions, the wind direction and speed, and the surrounding 
obstacles

Choose a suitabletake-off direction and technique

Lifting a helicopter off the ground also requires greatcare and skill from the 
pilot. The pilot needs to raise the collective very slowly until the 
helicopteris light on the skids, then position the cyclic to ensure that 
take-off will beprecisely vertical, before raising the collective further. The 
pilotalso needs to use the pedals to keep the helicopter straight and balanced.

If the take-offis done too fast or carelessly, or not as described above, the 
helicopter mayget into what is called ‘dynamic rollover’. This is when a 
helicopter turnsitself over instead of lifting into hover. It then proceeds to 
crash.This can occur quite easily if the helicopter’s center of gravity is 
displacedwhile power is being applied, as occurs during take-off.

To avoid dynamicrollover, pilots practice take-offs extensively before going 
solo in ahelicopter .They also make sure that none of the skids are stuck in 
mud, grass, or ice,which can also induce dynamic rollover.

Q3           Whatis a load resistor? Why is it used?

A3           Info Sage, Former InsightInvestigator (2018–2022)May 22

"A load resistor, in the contextof electrical circuits, is a resistor that is 
intentionally connected to acircuit to create a specific load or to simulate 
the behavior of a real load.It is used for various purposes in different 
applications, depending on thespecific requirements of the circuit.”

Here are a few keyreasons why load resistors are commonly used:

1. Voltage and Current Regulation: Load resistorsare often employed to regulate 
voltage and current levels in a circuit. Byplacing a load resistor in parallel 
or series with a device or component, itabsorbs excess voltage or current, 
ensuring that the desired levels aremaintained within the circuit. This can be 
crucial for preventing damage tosensitive components or ensuring proper 
operation of a circuit.

2. Testing and Calibration: Load resistors arevaluable tools in testing and 
calibration processes. They are used to simulatea specific load that a circuit 
or device would encounter in real-worldconditions. This allows engineers to 
assess the performance, efficiency, andreliability of circuits or devices under 
controlled circumstances. Load resistorshelp replicate the actual conditions 
that a device would experience, enablingaccurate testing and calibration 
procedures.

3. Signal Integrity and Matching: In certainapplications, load resistors are 
used to ensure signal integrity and impedancematching. For example, in 
communication systems or audio circuits, loadresistors can help maintain signal 
quality, prevent signal reflections, andensure proper matching between the 
source and load impedances. This helpsminimize signal degradation, distortion, 
and interference.

4. Power Dissipation: Load resistors are alsoemployed for power dissipation 
purposes. In some circuits, excess power mayneed to be dissipated to prevent 
overheating and damage to other components.Load resistors, specifically 
designed to handle high power levels, areconnected to absorb and dissipate the 
excessive power safely.

Q4           Howlong does it take for an airplane's engine to completely cool 
down after landingand taxiing in a normal weather condition (temperature)?

A4           AeroMugs, Aircraft Mug Manufacturer May30

The time it takes for an airplane's engine to cool downafter landing and 
taxiing can vary depending on several factors, including thespecific aircraft 
type, engine design, operating conditions, and ambienttemperature. 

However, innormal weather conditions, it generally takes anywhere from 15 to30 
minutes for an airplane's engines to cool downsignificantly.

After landing, theaircraft typically goes through a series of post-flight 
procedures, includingshutdown checks and securing the aircraft. During this 
time, the engines continue to operate at idle power to facilitate the 
coolingprocess. The amount of time required for cooling depends on the 
engine'sthermal mass, the external temperature, and the duration and intensity 
of theflight.

It's importantto note that modern aircraft engines are designed to withstand 
high operatingtemperatures and have built-in cooling systems.

 Additionally,the engine cowling and nacelles are designed to dissipate heat 
efficiently. Nevertheless, the cooling time isnecessary to ensure that the 
engines are at a safe temperature beforemaintenance personnel or ground crew 
perform any inspections, maintenance, orrefueling tasks.

Q5           Whatare the benefits of unripe bananas?

A5           Naveed Ihsan, Lives in The UnitedStates of America 
(2002–present)Wed

Unripe bananas,also known as green bananas, offer several unique benefits 
compared to fullyripe bananas.

Here are some of the benefits:

Resistant starch: Unripe bananas are an excellentsource of resistant starch, a 
type of dietary fiber that resists digestion inthe small intestine. This means 
that unripe bananas can act asa prebiotic, promoting the growth of beneficial 
gut bacteria and improvingdigestive health.

Lower sugar content: Unripe bananas contain lesssugar compared to their ripe 
counterparts. This can be beneficial forindividuals who need to manage their 
blood sugar levels, such as those withdiabetes or those following a low-sugar 
diet.

My note-On this account some doctors permit consuming bananas, jut toripe in 
moderation to diabetic patients.

Lower glycemic index: Due to their lower sugarcontent, unripe bananas have a 
lower glycemic index (GI) compared to ripebananas. Foods with a lower GI 
release glucose more slowly into thebloodstream, providing sustained energy and 
preventing rapid blood sugar spikes.

Increased satiety: The resistant starch in unripebananas can help increase 
feelings of fullness and satiety. This can beparticularly useful for those 
looking to manage their weight or control theirappetite.

Improved digestion: The fiber content in unripebananas can support healthy 
digestion by promoting regular bowel movements andpreventing constipation.

Nutrient profile: Unripe bananas contain many ofthe same beneficial nutrients 
as ripe bananas, including potassium, vitamin C,and vitamin B6. While the 
levels of these nutrients may be slightly lower inunripe bananas, they still 
offer valuable nutritional benefits.

My note- In Kerala it is common to havemezhukkupuratti, a side dish using raw 
plantain of any type. Nenthran and Poovan of Kerala are more delicious. The 
externalskin is peeled on top area, not fully removed.

In Tamilnadu it is a practice to consume poriyalmade of variety called Monthan 
on amavasi day

All the above QA are from Quora  website  on   05--06- 2023. 

Quora answers need not be 100% correct answers .

Compiled and posted by R. Gopala krishnan, former ITS,  on 05-06-2023

 

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