🧱 KPSC JE Civil – Solved Questions (Part 2: Q21–Q40)

This section contains questions 21 to 40 from the KPSC JE Civil set, each with the correct answer and explanation for every option.

📘 Q21. A staircase flight is defined as the distance between

• (1) Two consecutive floors – This is storey height.
• (2) Two consecutive steps – Incorrect definition.
• (3) Two consecutive treads – Still part of the step, not a flight.
• (4) Two consecutive landings – Correct. A flight is between two landings.

📘 Q22. Slope of void ratio vs log(effective stress) curve gives

• (1) Coefficient of compressibility – Incorrect.
• (2) Coefficient of volume change – Related but not slope.
• (3) Coefficient of consolidation – Not from e-log curves.
• (4) Compression index – Correct. Obtained from the straight portion of e-log σ curve.

📘 Q23. Liquidity index expression

• (1) (w − wP)/(wL − wP) – Correct. Standard formula.
• (2) (wL − w)/(w − wP) – Incorrect.
• (3) wL − wP – Difference only, not index.
• (4) (wL − wP)/(wL − w) – Incorrect.

📘 Q24. As per IRC, maximum possible width of a vehicle

• (1) 2.44 m – Correct. IRC standard.
• (2) 3.44 m – Too wide.
• (3) 1.88 m – Small vehicles only.
• (4) 4.0 m – Not allowed.

📘 Q25. Nagpur Road Plan uses which pattern?

• (1) Star and circular pattern – Correct.
• (2) Star and block pattern – No such pattern.
• (3) Star and grid pattern – Not in Nagpur plan.
• (4) Star and hexagonal pattern – No.

📘 Q26. Precipitation due to air mass striking a topographic barrier

• (1) Cyclonic precipitation – Due to low pressure systems.
• (2) Convective precipitation – Due to heating of air.
• (3) Frontal precipitation – Due to warm–cold front.
• (4) Orographic precipitation – Correct. Caused by mountains/barriers.

📘 Q27. Composite Sleeper Index is used to determine

• (1) Sleeper density – No.
• (2) Number of fixtures – No.
• (3) Durability of sleeper – No.
• (4) Strength & suitability of wooden sleepers – Correct.

📘 Q28. Water softening method requiring recarbonation

• (1) Lime–soda process – Correct. Requires CO₂ addition.
• (2) Sodium cation exchange – No recarbonation.
• (3) Demineralisation – Not required.
• (4) Hydrogen cation exchange – No.

📘 Q29. Maximum slenderness ratio for tension members

• (1) 180 – Used for compression.
• (2) 300 – Correct (as per IS 800).
• (3) 350 – Not used.
• (4) 400 – Too high.

📘 Q30. Plasticizers & superplasticizers are used to

• (1) Reduce water–cement ratio – True.
• (2) Increase workability – True.
• (3) Increase strength – True (indirect).
• (4) All of the above – Correct.

📘 Q31. IS code for design of RC elements

• (1) IS 875 – Loads code.
• (2) IS 800 – Steel structures.
• (3) IS 456 – Correct. RCC design code.
• (4) IS 8112 – OPC 43 grade cement.

📘 Q32. Theodolite is used to measure

• (1) Horizontal & vertical angles – Correct.
• (2) Horizontal & vertical distance – No.
• (3) RL at a point – Not directly.
• (4) None – Incorrect.

📘 Q33. Line joining equal elevation points

• (1) Contour gradient – Direction of steepest slope.
• (2) Contour surface – Imaginary surface.
• (3) Contour line – Correct.
• (4) Level line – Horizontal line.

📘 Q34. Closed contours with decreasing values represent

• (1) Hill – Values increase toward centre.
• (2) Depression – Correct.
• (3) Saddle – Hourglass shape.
• (4) River bed – Contour V-shape.

📘 Q35. In leveling, correct statements are

• (1) When instrument shifts, staff must not move – Correct.
• (2) Staff carried forward → instrument stationary – Correct.
• (3) Both A and B – Correct Answer.
• (4) Neither – Incorrect.

📘 Q36. Rotation of plane table to make map lines parallel to ground is called

• (1) Levelling – Making table horizontal.
• (2) Centering – Positioning over station.
• (3) Orientation – Correct.
• (4) Setting – General term.

📘 Q37. Initial setting time of OPC as per IS

• (1) 10 minutes – Too low.
• (2) 30 minutes – Correct.
• (3) 60 minutes – Final setting approaches.
• (4) 600 minutes – Incorrect.

📘 Q38. Le Chatelier’s device is used for

• (1) Setting time – Vicat apparatus used.
• (2) Soundness – Correct. Tests expansion.
• (3) Tensile strength – Not used.
• (4) Compressive strength – Cubes used.

📘 Q39. Cement suitable for massive structures like dams

• (1) OPC – High heat, not suitable.
• (2) Low heat cement – Correct.
• (3) Rapid hardening – Too much heat.
• (4) Sulphate resisting – For sulphate soils.

📘 Q40. Vehicle used in enamel paints

• (1) Linseed oil – Correct.
• (2) Water – Used in emulsion.
• (3) Varnish – Not vehicle.
• (4) None – Wrong.

✔ Part 3 (Q41–Q60) available on request.