Bihar Police Constable Operator Advanced Preparation Strategy 2026 -20 Practice Questions & Mock Test 3

📌 What You’ll Get in This Article

• ✅ 20 Practice Questions with Answers (First Attempt this)👇
• 📊 Free Full Mock Test (Attempt at the End & Know Your Score)⬇️
• 🎯 Step-by-Step Preparation Strategy

What Separates Selected Candidates From Others

The real difference shows in the last 60-90 days. Selected ones:

• Score 20-24/25 in each PCM section by perfecting formula application and avoiding silly calculation errors.
• Do 2-3 full-length mocks weekly under strict 2-hour timing, then spend double the time analyzing.
• Maintain error logs religiously—only revise from this notebook in final weeks.
• Balance written prep with physical: daily 1.6 km runs in target time, plus practice for long jump/high jump if applicable.
• Stay calm—no new topics after syllabus coverage; confidence comes from repeated high mock scores (80+).
• Use minimal resources: stick to NCERT + one objective book per subject + previous papers.

They don’t study harder; they eliminate waste and execute flawlessly.

Bihar Police Constable Operator High Weightage Topics You Must Master

These topics appear repeatedly and offer high-scoring opportunities if nailed.

Physics (25 marks – target 22-24)

• Mechanics: Newton’s Laws, Work-Energy Theorem, Circular Motion numericals
• Current Electricity & Magnetism: Ohm’s Law applications, Magnetic fields, Induction
• Optics: Reflection, Refraction, Lens formula problems
• Thermodynamics: Heat transfer, Laws basics

Chemistry (25 marks – target 21-23)

• Atomic Structure & Chemical Bonding: Quantum numbers, VSEPR, Hybridization
• Periodic Properties: Trends, s/p-block elements
• Basic Organic: IUPAC naming, Reactions of hydrocarbons
• States of Matter & Solutions: Ideal gas, Colligative properties

Mathematics (25 marks – target 22-24)

• Arithmetic: Profit-Loss, SI/CI, Time & Work, Pipes
• Algebra: Linear/Quadratic equations, Polynomials
• Geometry: Coordinate geometry basics, Circle theorems
• Trigonometry & Mensuration: Identities, Height-distance, 2D/3D figures

GK & Current Affairs (25 marks – target 18-22)

• Bihar GK: Rivers, Districts, Historical events, Schemes like Saat Nishchay
• National/International: Major 2025-2026 events, Awards, Sports winners, Polity basics

Prioritize numericals in PCM—they decide merit ranks.

Advanced Preparation Strategy

Shift to performance mode:

• Daily schedule: 3 hours PCM problem-solving (focus numericals), 1 hour GK/current affairs quick revision, 1-2 hours mock + analysis.
• Mock strategy: Alternate full 100-question tests with sectional tests; aim progressive score improvement (from 75 → 85+).
• Formula mastery: Maintain subject-wise one-pagers—glance 3-4 times daily.
• Speed drills: 50 questions in 40 minutes per subject to build <45 sec/question pace.
• Doubt resolution: Use free advanced videos (Physics Wallah, Unacademy free sessions) or Telegram expert groups.
• Physical integration: 4-5 days/week running + strength exercises; check height/chest/weight against notification standards early.

Consistency here turns good preparation into selection.

Smart Revision Techniques

Forget passive reading—use these active methods for retention:

• Feynman technique: Explain tough topics aloud as if teaching someone—exposes gaps.
• Spaced repetition: High-weightage topics on Day 1, 4, 10, 20; use free apps like Anki for flashcards.
• One-page summaries: Condense each chapter into visuals/formulas—revise these only.
• Error-focused revision: Maintain “Wrong Questions Diary”—redo similar problems daily.
• Final 20-30 days: Only mocks (every alternate day), error notebook, formula sheets—no fresh content.
• Quick scans: Before sleep, 15-min GK fact recall or formula recitation.

These keep 85-90% recall under exam pressure.

Mistakes Even Serious Aspirants Make

Watch out—these ruin strong preparations:

• Introducing new study material in last month—causes confusion.
• Over-focusing GK/current affairs while PCM numerical speed lags.
• Skipping detailed mock analysis—same errors repeat.
• Delaying physical training—written clear but PET fail common.
• Last-week cramming—leads to fatigue and silly mistakes in exam.
• Poor sleep/nutrition—drops focus in 2-hour paper.

Correct these to protect your hard work.

One key takeaway from this advanced stage: cracking Bihar Police Constable Operator isn’t about volume of study—it’s about accuracy in PCM numericals, smart revision of high-weightage areas, and flawless execution on exam day. Master these, and you’re in the final merit list for the 993 posts.

Practice Question – Tough to Advance Level

Question 1
निम्नलिखित में से कौन-सा वाक्य सर्वथा शुद्ध है? (Advanced Grammar Trap)
A. वह किताब पढ़कर रख दी गई।
B. वह किताब पढ़कर रख दी गई थी।
C. वह किताब पढ़कर रख दी।
D. किताब पढ़कर वह रख दी गई।
Click Here to Know the Answer

Answer: C
Explanation: “पढ़कर रख दी” में क्रिया का प्रयोग स्वाभाविक और व्याकरणिक रूप से सही है। अन्य विकल्पों में अनावश्यक सहायक क्रिया या गलत संरचना है।

Question 2
“हाथी के दांत खाने के और, दिखाने के और” मुहावरे का सही अर्थ क्या है?
A. दिखावा करना
B. दोहरी बातें करना
C. मजबूत होना
D. भयभीत होना
Click Here to Know the Answer

Answer: A
Explanation: यह मुहावरा ऐसे व्यक्ति के लिए प्रयोग होता है जो बाहर से कुछ और दिखाता है लेकिन असल में कुछ और होता है।

Question 3
Assertion (A): The number of molecules in 18 g of water is $6.022 × 10^{23}$6.022×1023.
Reason (R): 18 g of water equals 1 mole and 1 mole contains Avogadro’s number of molecules.
A. Both A and R are true and R explains A
B. Both A and R are true but R does not explain A
C. A is true but R is false
D. A is false but R is true
Click Here to Know the Answer

Answer: A
Explanation: 18 g of water equals 1 mole and one mole contains Avogadro’s number $6.022 × 10^{23}$6.022×1023 molecules.

Question 4
A sum of money amounts to ₹9261 in 3 years at 10% compound interest (annually). What is the principal?
A. ₹7000
B. ₹7500
C. ₹8000
D. ₹6950
Click Here to Know the Answer

Answer: A
Explanation:
$A = P(1.1)^3$A=P(1.1)3
$9261 = P × 1.331$9261=P×1.331
$P ≈ 6960$P≈6960
Closest option is ₹7000.

Question 5
The sides of a triangle are 7 cm, 8 cm and 9 cm. Find the area using Heron’s Formula.
A. 26.83 cm²
B. 24 cm²
C. 30 cm²
D. 28 cm²
Click Here to Know the Answer

Answer: A
Explanation:
Semi-perimeter $s = (7+8+9)/2 = 12$s=(7+8+9)/2=12
Area
$= \sqrt{12(12-7)(12-8)(12-9)}$=12(12−7)(12−8)(12−9)​
$= \sqrt{12×5×4×3}$=12×5×4×3​
$= \sqrt{720} ≈ 26.83$=720​≈26.83

Question 6
For a convex lens, object distance $u = -24$u=−24 cm produces a real image at $v = 48$v=48 cm. Find the focal length.
A. 16 cm
B. –16 cm
C. 8 cm
D. 32 cm
Click Here to Know the Answer
.

Answer: A
Explanation:
$\frac{1}{f} = \frac{1}{v} – \frac{1}{u}$f1​=v1​−u1​
$= \frac{1}{48} + \frac{1}{24}$=481​+241​
$= \frac{3}{48} = \frac{1}{16}$=483​=161​
$f = 16$f=16 cm

Question 7
Which Article of the Indian Constitution abolishes untouchability?
A. Article 17
B. Article 15
C. Article 21
D. Article 14
Click Here to Know the Answer

Answer: A
Explanation: Article 17 abolishes untouchability and prohibits its practice in any form.

Question 8
Bihar’s “Jal-Jeevan-Hariyali” Mission mainly focuses on:
A. Water conservation, tree plantation and climate protection
B. Road construction
C. Urban electrification
D. Industrial development
Click Here to Know the Answer

Answer: A
Explanation: The program focuses on water conservation, plantation drives and environmental protection.

Question 9
If
$x^2 + y^2 + z^2 = 50$x2+y2+z2=50
and
$xy + yz + zx = 3$xy+yz+zx=3
Find $(x + y + z)^2$(x+y+z)2.
A. 56
B. 47
C. 53
D. 50
Click Here to Know the Answer

Answer: A
Explanation:
$(x+y+z)^2 = x^2 + y^2 + z^2 + 2(xy+yz+zx)$(x+y+z)2=x2+y2+z2+2(xy+yz+zx)
$= 50 + 2×3 = 56$=50+2×3=56

Question 10
The site of the Electron Transport Chain in cellular respiration is:
A. Inner mitochondrial membrane
B. Mitochondrial matrix
C. Cytoplasm
D. Nucleus
Click Here to Know the Answer

Answer: A
Explanation: Electron transport chain occurs on the inner mitochondrial membrane (cristae).

Question 11
Who founded the Bihar Provincial Kisan Sabha in 1929?
A. Swami Sahajanand Saraswati
B. Rajendra Prasad
C. Jayaprakash Narayan
D. Anugrah Narayan Sinha
Click Here to Know the Answer

Answer: A
Explanation: Swami Sahajanand Saraswati founded the Bihar Provincial Kisan Sabha.

Question 12
A boat travels 30 km downstream in 5 hours and returns the same distance upstream in 6 hours. What is the speed of the stream?
A. 0.5 km/h
B. 1 km/h
C. 1.5 km/h
D. 2 km/h
Click Here to Know the Answer

Answer: A
Explanation:
Downstream speed = $30/5 = 6$30/5=6 km/h
Upstream speed = $30/6 = 5$30/6=5 km/h
Stream speed
$= (6−5)/2 = 0.5$=(6−5)/2=0.5 km/h.

Question 13
Assertion (A): Ozone layer depletion occurs due to CFCs.
Reason (R): CFCs release chlorine radicals which break ozone into oxygen.
A. Both A and R are true and R explains A
B. Both true but R does not explain A
C. A true but R false
D. A false but R true
Click Here to Know the Answer

Answer: A
Explanation: Chlorine radicals catalytically destroy ozone molecules in the stratosphere.

Question 14
Which amendment added the words “Socialist”, “Secular” and “Integrity” to the Preamble?
A. 42nd Amendment
B. 44th Amendment
C. 73rd Amendment
D. No amendment
Click Here to Know the Answer

Answer: A
Explanation: The 42nd Constitutional Amendment Act, 1976 added these words to the Preamble.

Question 15
If $sinθ + cosθ = √2 sinθ$sinθ+cosθ=√2sinθ, then find $tanθ$tanθ.
A. 1
B. √3
C. 0
D. Undefined
Click Here to Know the Answer

Answer: A
Explanation:
Divide both sides by $cosθ$cosθ
$tanθ + 1 = √2 tanθ$tanθ+1=√2tanθ
Solving gives $tanθ = 1$tanθ=1.

Question 16
In which year did the Bihar Movement (JP Movement) reach its peak?
A. 1974
B. 1975
C. 1977
D. 1972
Click Here to Know the Answer

Answer: A
Explanation: The movement led by Jayaprakash Narayan gained momentum in 1974.

Question 17
A man invests ₹8000 at 5% simple interest for 3 years and ₹10000 at 6% compound interest for 2 years. Find the total interest earned.
A. ₹2436
B. ₹3200
C. ₹3000
D. ₹2800
Click Here to Know the Answer

Answer: A
Explanation:
SI = $8000×5×3/100 = 1200$8000×5×3/100=1200
CI = $10000[(1.06)^2−1]$10000[(1.06)2−1]
= $10000×0.1236 = 1236$10000×0.1236=1236
Total interest = 2436

Question 18
Which gas turns lime water milky but clears again when passed in excess?
A. CO₂
B. SO₂
C. NO₂
D. Cl₂
Click Here to Know the Answer

Answer: A
Explanation: CO₂ forms CaCO₃ (milky). Excess CO₂ converts it into soluble Ca(HCO₃)₂.

Question 19
The Right to Property ceased to be a Fundamental Right by which amendment?
A. 44th Amendment
B. 42nd Amendment
C. 86th Amendment
D. 73rd Amendment
Click Here to Know the Answer

Answer: A
Explanation: The 44th Amendment (1978) removed the Right to Property as a Fundamental Right.

Question 20
A pipe fills a tank in 12 minutes while another empties it in 18 minutes. If both are opened together, how long will it take to fill one-third of the tank?
A. 12 minutes
B. 18 minutes
C. 21.6 minutes
D. 24 minutes
Click Here to Know the Answer

Answer: A
Explanation:
Net rate
$1/12 − 1/18 = 1/36$1/12−1/18=1/36
Time for $1/3$1/3
$(1/3) ÷ (1/36) = 12$(1/3)÷(1/36)=12 minutes.

Free Mock Test – (Tough to Advance Level) – Click Here to Attempt the Mock Test

Mock Test Evaluation & Performance Analysis (Tough to Very Tough Level)

Score Calculation Each correct answer = 1 mark | Total = 50 marks Your score = number of correct answers

Performance Benchmarks

• 38–50: Excellent – strong rank potential
• 30–37: Very Good – good cut-off chance with revision
• 22–29: Average – focus on weak subjects immediately
• Below 22: Needs intensive practice

Quick Analysis Tips

1. Count wrong answers by subject (Hindi/English, Maths, Science, GK/Social Science).
2. Highest mistakes = top priority revision area.
3. Note time per section (aim: Maths+Science ≤ 45 min, others ≤ 35 min).
4. Re-solve all incorrect questions tomorrow.
5. Maintain error log: question → wrong choice → correct answer → reason.

Topper Advice for Tough Level Focus especially on Bihar-specific topics (Kosi floods, Champaran Satyagraha, JP Movement, Jal Jeevan Hariyali), multi-step calculations, polity articles/amendments, and tricky science applications. Revise errors daily, take timed full mocks 2–3 times/week, read Bihar + national current affairs.

Key Takeaway

Mastering PCM basics from NCERT Class 11 & 12 is non-negotiable for Bihar Police Constable Operator — these three subjects alone carry 75 marks and decide whether you qualify for PST/PET or not. Start here, build strong conceptual clarity, and the rest of the preparation becomes much easier.

Frequently Asked Questions (FAQs)

Q1: Is Science stream mandatory for Bihar Police Constable Operator 2026? A: No, the notification allows any 10+2 stream, but candidates with Physics, Chemistry, Mathematics in Intermediate have a clear advantage because 75% of the written exam is PCM-based. Non-science students must put in extra effort on these subjects.

Q2: What is the level of questions in the Bihar Police Constable Operator written exam? A: Questions are strictly 10+2 (Intermediate) standard — mostly NCERT-based concepts with some numericals in Physics and Math, and factual/theory in Chemistry and GK.

Q3: How many vacancies are there in Bihar Police Constable Operator Advt. No. 02/2026? A: There are 993 vacancies announced by CSBC for Constable Operator posts in 2026.

Q4: Is there negative marking in the Bihar Police Constable Operator exam? A: No, there is no negative marking. You should attempt all 100 questions to maximize your score.

Q5: Which subject should beginners focus on first? A: Start with Physics and Mathematics numericals because they require formula practice and concept clarity — GK can be built gradually with daily reading.

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