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[official][prelims 2023] How was prelims result? In or out?

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DM,VERMA_KIRANDEVI_LALBAHADURand12 otherslike this
296.1k views

747 comments

HFC is used in lubricants right? Even forum has given a source for this. https://sinopecenergy.com/wp-content/uploads/2015/08/HFC-4631-Water-Glycol-Fire-Resistant-Hydraulic-Fluid.pdf. Pls chk this too. I think answer is all the abouve, though I marked in wrong.

4.2k views

Link is empty. Also, by simple logic HFC is a gas and Lubricants are mostly liquid or solid like graphite. How can a gas be used in Lubricants? 

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@AureliusM https://sinopecenergy.com/wp-content/uploads/2015/08/HFC-4631-Water-Glycol-Fire-Resistant-Hydraulic-Fluid.pdf


I don't think HFC here means Hydro Fluorocarbon. 

4.1k views


The wiki page of lubricants mentions florocarbons are used in formation 

plmokn25688524,
4k views
@Omen hfc and fluorocarbons are different 


3.8k views
@Omen hfc and fluorocarbons are different 


It says hydrogenated flourocarbons though

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@plmokn25688524 isn’t procedure established by law is also fair application of law?


plmokn25688524,
3.6k views
@quasiwin 
Coaching centres and their irresponsible keys...

Every one has considered lubricants have hfc because of this article.
The HFC-type hydraulic fluids are water-glycol hydraulic fluids. They contain around 40-45% water. Condat offers CONDAT GUARD C46, with a formulation specially adapted to meet customer requirements in terms of lubrication, fire-resistance and biodegradabilityhttps://www.condat-lubricants.com/product/oils/hydraulic-oils/fire-resistant-hydraulic-fluids/hfc-hydraulic-fluids/


HFC in that random article doesn't stand for hydorfluorocarbons at all....It stands for hydraulic fluids. EVerywhere lubricants are a seperate product used in HFC refrigerant systems....Just because HFC and lubricants are appearing in the same place doesn't mean lubricants have hydrofluorocarbons in them.

In contrast, there is a research article which shows how hfc in a lubricant actually decreases its lubricity and increased wear and tear of the machinery.


AureliusM,Najdorfand5 otherslike this
3.6k views

HFC - Lubricant question.


We need to carefully read the question. The question is not asking whether HFC can be used as lubricant or not. Question is simply asking whether HFC can be used in "making" of Lubricant or not. Catch is in the word "making".


For example Electricity can not be used as lubricant. But Electricity can be used in making of Lubricant. The word "making" has made the question very broad.


Also it is noteworthy that, though HFC can not be directly used as lubricant, but HFCs can be used in making of spray based lubricant. There are many spray type lubricant which uses HFCs. 


For reference I'm attaching the question below. You can notice the word "maing" in it.

Q. Consider the following:
1.Aerosols
2.Foam agents
3.Fire retardants
4.Lubricants
In themakingof how many of the above are hydrofluorocarbons used?


By this logic answer should be - "D" (All four correct).


Though UPSC might as well give answer as - "C" (Three pair).

MaximilienRobespierre,
3.2k views

HFC - Lubricant question.


We need to carefully read the question. The question is not asking whether HFC can be used as lubricant or not. Question is simply asking whether HFC can be used in "making" of Lubricant or not. Catch is in the word "making".


For example Electricity can not be used as lubricant. But Electricity can be used in making of Lubricant. The word "making" has made the question very broad.


Also it is noteworthy that, though HFC can not be directly used as lubricant, but HFCs can be used in making of spray based lubricant. There are many spray type lubricant which uses HFCs. 


For reference I'm attaching the question below. You can notice the word "maing" in it.

Q. Consider the following:
1.Aerosols
2.Foam agents
3.Fire retardants
4.Lubricants
In themakingof how many of the above are hydrofluorocarbons used?


By this logic answer should be - "D" (All four correct).


Though UPSC might as well give answer as - "C" (Three pair).

I think that it is a bit of a stretch. It would imply that HFCs are used in making any good that requires refrigeration.

3.3k views
@Srinjay May be... But the word "making" is not being inferred here. It is explicitly written.

Answer to this question would be C (only three) as HFCs can not be directly used as Lubricants.

Answer could as well be D if we consider spray-on lubricant or fire-resistant  lubricants as HFCs are being used in making of this category of lubricants.

However hard we may try, there would be no clarity over this question till UPSC releases answer key in June 2024.
Averageaspirant,
3.1k views
Any chances of the cut off being in the range of 75 to 80? I mean not gng above 80? I mean for gen category.
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Any chances of the cut off being in the range of 75 to 80? I mean not gng above 80? I mean for gen category.

Which questions are doubtful for you? And have you treated them as negatives or positive while reaching  at this score? A lot will depend on this.


If 75-80 is your most conservative estimate, while about 90 is your most optimistic estimate then you might clear. But if 75-80 is the most optimistic estimate, while the most conservative one being less than 70 then it's very tricky situation.

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Due process of law-C

Lubricants- C

Gandak - one only

Gcm one only

Prisons option C

Considered all these r wrong. Gett

plmokn25688524,
2.9k views
What is the consensus on Carbon Markets Question? I have marked as C. The second statement( resource transfer from private to State) should not always be correct. 
plmokn25688524,
2.9k views

Please attach the source where it is mentioned hfcs are used in spray based lubricants. I would agree with you if I see it.


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1. stupa

2. literary works- nagasena or nagarjuna

3. Due process of law

4. Prisons

5. Amendment question

6. finance bill/money bill

7.community reserve

8.scheduled areas

9. indian squirell

10.HFCs

11. gandak river

12.carbon markets

13. chad/guinea/mali/sudan

14.besnagar/bhaja/sittanavasal- some are claiming shaivite cave shrine is in besnagar

15. GCM(internal migration)

16.temperature contrast (summer/winter)

17.accelerometer

18.pulsars - right or wrong

19.MSME loans

20. SHG

21. preventive detention/PoTA

42(+14) marks - difference in answer keys of various institutes

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https://mde.maryland.gov/programs/workwithmde/Documents/AQCAC_HFC12162019.pdf

This paper clearly shows which hfc can be used as lubricants. So the answer definitely will be D.

2.9k views
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