Headline: TNPSC Group IV – 15 Daily Questions on Tamil Grammar, SI Units and BODMAS! Date: Thursday, 15 October 2026 Category: TNPSC Grp IV Topics: General Tamil – Demonstrative and interrogative letters; General Studies – Measurements and SI units; Aptitude – Simplification. Unique questions: 15 (8 Tamil + 5 General Studies + 2 Aptitude). Suggested time: 15 minutes.
Attempt all questions before checking the answer key. This English companion repeats the same 15 question IDs; it is NOT an additional test. Questions 1–8 retain their Tamil wording and options because Tamil language knowledge is being tested. Every answer has a simple English explanation. All 15 headline questions are ORIGINAL MODEL QUESTIONS. Matching official TNPSC Group IV PYQ question numbers and final-key answers could not be verified for these precise topics in this run. No unverified question is labelled a PYQ.
=== SECTION A: 15 QUESTIONS ===
1. [மாதிரி வினா / Original model] சுட்டெழுத்துகளின் சரியான தொகுதி எது?
A) அ, இ, உ B) எ, யா, ஆ C) அ, ஆ, இ D) ய, ர, ல
2. [மாதிரி வினா / Original model] அண்மைச்சுட்டை உணர்த்தும் எழுத்து எது?
A) அ B) இ C) உ D) ஏ
3. [மாதிரி வினா / Original model] “அவன்” என்ற சொல்லில் வரும் சுட்டு எவ்வகை?
A) அண்மைச்சுட்டு B) சேய்மைச்சுட்டு C) இடைமைச்சுட்டு D) வினா எழுத்து
4. [மாதிரி வினா / Original model] பழந்தமிழில் இடைமைச்சுட்டாக வழங்கிய எழுத்து எது?
A) அ B) இ C) உ D) ஓ
5. [மாதிரி வினா / Original model] கீழ்க்கண்டவற்றில் அகச்சுட்டுக்கு எடுத்துக்காட்டு எது?
A) அம்மரம் B) இம்மரம் C) இவன் D) அவ்வீடு
6. [மாதிரி வினா / Original model] புறச்சுட்டுக்கு எடுத்துக்காட்டு எது?
A) இவன் B) அவன் C) இது D) அம்மரம்
7. [மாதிரி வினா / Original model] வினா எழுத்துகளின் சரியான தொகுதி எது?
A) எ, யா, ஆ, ஓ, ஏ B) அ, இ, உ C) க, ச, ட, த, ப, ற D) ய, ர, ல, வ, ழ, ள
8. [மாதிரி வினா / Original model] “வருவாயா?” என்பது எந்த வினா வகைக்கு எடுத்துக்காட்டு?
A) அகவினா B) புறவினா C) அகச்சுட்டு D) புறச்சுட்டு
9. [மாதிரி வினா / Original model] What is the SI base unit of temperature?
A) Degree Celsius B) Kelvin C) Joule D) Pascal
10. [மாதிரி வினா / Original model] A light-year is a unit of what?
A) Time B) Energy C) Distance D) Speed
11. [மாதிரி வினா / Original model] What is the SI unit of pressure?
A) Newton B) Joule C) Watt D) Pascal
12. [மாதிரி வினா / Original model] Which pair gives the SI units of mass and weight, respectively?
A) kg, N B) N, kg C) kg, Pa D) m, kg
13. [மாதிரி வினா / Original model] What is the least count of the typical screw gauge described in the textbook?
A) 1 mm B) 0.1 mm C) 0.01 mm D) 10 mm
14. [மாதிரி வினா / Original model] Evaluate: 72 ÷ 8 × (5 − 2) + 6.
A) 15 B) 27 C) 33 D) 39
15. [மாதிரி வினா / Original model] Evaluate: 3/4 + 1/2 × 2.
A) 5/4 B) 7/4 C) 2 D) 3/2
=== ANSWER KEY AND EXPLANATIONS – 15 QUESTIONS ===
1. A) அ, இ, உ — The three demonstrative letters are அ, இ and உ. 2. B) இ — இ points to something near the speaker (அண்மைச்சுட்டு), as in இது. 3. B) சேய்மைச்சுட்டு — அ marks something farther away (சேய்மைச்சுட்டு), as in அவன். 4. C) உ — உ is the older middle-distance demonstrative (இடைமைச்சுட்டு), rare in modern usage. 5. C) இவன் — In இவன், removing இ does not leave an independently meaningful base word in this usage; it is அகச்சுட்டு. 6. D) அம்மரம் — In அம்மரம், removing the demonstrative element leaves மரம், a meaningful noun; it is புறச்சுட்டு. 7. A) எ, யா, ஆ, ஓ, ஏ — The five interrogative letters are எ, யா, ஆ, ஓ and ஏ. 8. B) புறவினா — The question marker ஆ is added at the end of வருவாய், making வருவாயா? an example of புறவினா. 9. B) Kelvin — The SI base unit for thermodynamic temperature is kelvin (K). 10. C) Distance — It is the distance travelled by light in a vacuum in one year. 11. D) Pascal — Pressure equals force divided by area, and its SI unit is pascal (Pa). 12. A) kg, N — Mass is measured in kilograms (kg); weight is a force measured in newtons (N). 13. C) 0.01 mm — The textbook example has a least count of 0.01 mm; actual instruments may differ. 14. C) 33 — First solve brackets: 5 − 2 = 3. Then divide and multiply left to right: 72 ÷ 8 × 3 + 6 = 9 × 3 + 6 = 33. 15. B) 7/4 — Multiply before adding: (1/2) × 2 = 1. Therefore 3/4 + 1 = 7/4 = 1.75.
=== COMPLETE BOOK-BACK CHAPTER PRACTICE – ADDITIONAL VERIFIED QUESTIONS (BATCH 1/5) ===
Source: Tamil Nadu SCERT Class 9 Science (2020 edition), Physics Unit 1 – Measurement, textbook exercises pp. 11–12, I.1–I.4 and II.1–II.4. Exercise numbers and concepts were checked against the actual SCERT chapter. Questions below are paraphrased, not long verbatim reproductions. These eight additional exercises are OUTSIDE the 15 headline MCQs.
B01. [Verified book-back | Class 9 Science, Unit 1, I.1] Arrange these length units from smallest to largest. Answer: mm < cm < m < km. Explanation: Millimetre is smaller than centimetre, metre and kilometre.
B02. [Verified book-back | Class 9 Science, Unit 1, I.2] What do a ruler, measuring tape and metre scale measure? Answer: Length. Explanation: They are instruments for measuring length.
B03. [Verified book-back | Class 9 Science, Unit 1, I.3] How many quintals equal one metric tonne? Answer: 10 quintals. Explanation: One tonne is 1000 kg and one quintal is 100 kg.
B04. [Verified book-back | Class 9 Science, Unit 1, I.4] Which measures force rather than mass: spring balance, beam balance, physical balance or digital balance? Answer: Spring balance. Explanation: A spring balance measures weight, which is a force.
B05. [Verified book-back | Class 9 Science, Unit 1, II.1] Metre is the unit of which physical quantity? Answer: Length. Explanation: Metre is the SI base unit of length.
B06. [Verified book-back | Class 9 Science, Unit 1, II.2] Name a conventional balance used to measure 1 kg of rice. Answer: Beam balance. Explanation: It compares the sample with standard masses.
B07. [Verified book-back | Class 9 Science, Unit 1, II.3] Which instrument is suitable for measuring the diameter of a cricket ball? Answer: Vernier caliper. Explanation: Its outer jaws can measure the external diameter.
B08. [Verified book-back | Class 9 Science, Unit 1, II.4] How can the radius of a thin wire be determined accurately? Answer: Screw gauge. Explanation: Measure the diameter using a screw gauge, then divide by two.
Book-back progress: Class 9 Science, Unit 1 – 8 of 36 numbered exercises/sets completed; 28 pending. Batch 2/5 will continue from II.5 and the subsequent exercise sections. The 36-item count applies to the 2020 edition; comparison with 2026–27 is pending. Class 6 Tamil – demonstrative/interrogative letters: original full book-back source not yet verified; completed 0, total unknown. Class 6 Mathematics – simplification: original full book-back source not yet verified; completed 0, total unknown. Verified TNPSC PYQs in this post: 0. No ticks or markings on uploaded scans have been treated as official answers.
Spaced revision of Day 03: 16, 18, 22 and 29 October 2026 (1/3/7/14-day intervals). Review wrong answers first.
