KPSC JE Civil Solved Questions – 20 Important Questions with Detailed Explanation

🧱 KPSC JE Civil – Solved Questions with Full Explanation (Part 1)

This set contains the first 20 questions extracted from the KPSC JE Civil question paper. Each question includes the correct answer and detailed explanations for all options.

📘 Q1. The proportion of cement, sand and aggregates for M20 grade concrete is

(1) 1 : 2 : 4 – Incorrect. This is the nominal mix for M15.
(2) 1 : 1.5 : 3 – Correct. Standard nominal mix for M20.
(3) 1 : 3 : 4 – Incorrect. Not used for any grade.
(4) 1 : 4 : 3 – Incorrect. Invalid proportion.

📘 Q2. Excessive nitrate in drinking water causes

(1) Colour blindness – No relation with nitrate.
(2) Fluorosis – Caused by excess fluoride.
(3) Methemoglobinemia – Correct. Also called Blue Baby Syndrome.
(4) Rickets – Caused by Vitamin D deficiency.

📘 Q3. Correct connection sequence of municipal water service pipe

Components: A. Stopcock, B. Gooseneck, C. Ferrule, D. Water meter

(1) A, B, C, D – Incorrect order.
(2) C, A, B, D – Incorrect.
(3) A, B, D, C – Incorrect.
(4) C, B, A, D – Correct. Ferrule → Gooseneck → Stopcock → Water meter.

📘 Q4. As per IS 1172-1971, domestic water consumption is

(1) 135 lpcd – Correct. Standard for normal Indian cities.
(2) 150 lpcd – Used in metro cities.
(3) 165 lpcd – Higher than IS requirement.
(4) 200 lpcd – For luxurious consumption.

📘 Q5. NBC recommends foundation depth of

(1) 150 cm – Too deep.
(2) 50 cm – Too shallow.
(3) 90 cm – Correct.
(4) 100 cm – Not the NBC standard.

📘 Q6. Door suitable for air-conditioned buildings is

(1) Revolving door – Correct. Prevents entry of outside air.
(2) Sliding door – Not airtight.
(3) Swing door – Allows air leakage.
(4) Collapsible door – Very leaky.

📘 Q7. In a plate load test, recommended bearing plate size is

(1) 30–75 cm – Correct.
(2) 50–500 cm – Impractical sizes.
(3) 100–500 cm – Too large.
(4) 75–300 cm – Upper limit too large.

📘 Q8. Coning of wheels is provided to

(1) Check lateral movement – True.
(2) Avoid damage to inner rail faces – True.
(3) Improve passenger comfort – True.
(4) All of the above – Correct.

📘 Q9. Best method of refuse disposal that destroys pathogens

(1) Land disposal – Does not destroy pathogens completely.
(2) Incineration – Correct. High temperature kills bacteria.
(3) Pulverisation – Only reduces size.
(4) Composting – Not complete destruction.

📘 Q10. Magnetic bearing = 48°24′, declination = 5°38′ East. True bearing?

(1) 42°02′ – Incorrect (subtraction done).
(2) 42°46′ – Incorrect.
(3) 54°02′ – Correct. TB = MB + Declination.
(4) 54°46′ – Addition incorrect.

📘 Q11. Materials with random atomic arrangement are

(1) Brittle – Property, not structure.
(2) Amorphous – Correct. No crystal structure.
(3) Ceramic – Crystalline.
(4) Elastic – Behavior.

📘 Q12. Partial elimination of formwork is possible in

(1) Ferrocement – Correct. Very thin section.
(2) Concrete beam – Needs full formwork.
(3) Lintel – Needs formwork.
(4) PSC – Needs full formwork.

📘 Q13. Deflection of a cantilever under couple M

(1) 2ML/EI – Correct.
(2) ML²/4EI – Incorrect formula.
(3) ML²/8EI – Incorrect.
(4) ML²/16EI – Incorrect.

📘 Q14. Sodium benzoate in RCC reduces

(1) Cracks – No effect.
(2) Shrinkage – No.
(3) Creep – No.
(4) Corrosion – Correct.

📘 Q15. Sudden valve closing in pipeline causes

(1) Expansion – Incorrect.
(2) Contraction – No.
(3) Water hammer – Correct.
(4) Turbulent flow – Possible but not primary effect.

📘 Q16. Gas causing high mortality from incomplete combustion

(1) Carbon monoxide – Correct.
(2) Hydrogen sulphide – Toxic but not cause here.
(3) Nitrogen oxide – Not primary.
(4) Sulphur dioxide – Causes respiratory issues.

📘 Q17. System used for spatial/geographical data

(1) GIS – Correct.
(2) GPS – Positioning system.
(3) Contours – Representation.
(4) Topography – Study.

📘 Q18. Which increases soil strength but reduces fertility?

(1) Soil compaction – Correct.
(2) Pore pressure – Opposite effect.
(3) Moisture – No.
(4) Clay content – No.

📘 Q19. Value shown after depreciation is

(1) Scrap value – Value when unusable.
(2) Salvage value – Expected resale value.
(3) Book value – Correct.
(4) Market value – Current selling value.

📘 Q20. Equipment with its own prime mover is

(1) Tower crane – Stationary.
(2) Mobile crane – Correct. Moves freely.
(3) Lift – Fixed.
(4) Wheel barrow – Man-powered.

✔ Part 2 (next 20 questions) available on request.

Building Aaya

KPSC JE Civil – Solved Questions with Explanation (Part 1)