Home / Topic / Lubricants
Topic Lubricants
Asked 2 times across 2 UPSC exams over 9 years (2014–2023), peaking in 2014.
Key insights
- Most tested in CDS — 1 of 2 PYQs
- Most asked in 2014
- Recurs across 2 years (2014–2023)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2014 → CISF 2023
How the concept evolved
Long-running — most appearances (1 of 2) predate 2016, and it still returns.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CISF2023
Which one of the following substances is not used as a lubricant in heavy industries?
- A Graphene
- B Talc
- C Glass
- D Sand ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CDS2014
Which of the following is a good lubricant?
- A Diamond powder
- B Graphite powder ✓
- C Molten carbon
- D Alloy of carbon and iron
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
Study how UPSC repeats — not just the papers
₹199 / 1 year · Founding Member
Full access unlocks the three things no PYQ PDF gives you:
① Cross-exam learning — see the same idea recur across CSE, CAPF, CDS and NDA.
② Topic evolution — how each idea is framed, year by year.
③ Question intelligence — every PYQ + answer, linked to related concepts and similar questions.
e.g. Round Table Conference: CDS 2017 → CSE 2017 → … → CAPF 2024
15 days free, no card required — then ₹199 for 1 year.
Start your 15-day free trial →