🧱 KPSC JE Civil – Solved Questions (Part 13: Q241–Q260)

This section includes questions 241 to 260 with detailed explanation for each option.

📘 Q241. The water-cement ratio for maximum strength?

• (1) 0.4–0.6 – Correct. Optimal range.
• (2) 0.2–0.3 – Insufficient water.
• (3) 0.7–0.9 – Very weak concrete.
• (4) 1.0 – Not acceptable.

📘 Q242. Soil having highest permeability?

• (1) Gravel – Correct.
• (2) Clay – Least permeability.
• (3) Silt – Moderate.
• (4) Peat – Organic, compressible.

📘 Q243. The most commonly used cement in India?

• (1) OPC – Correct.
• (2) PPC – Increasing use but still behind OPC.
• (3) Quick-setting – Special use.
• (4) Low heat – Dams only.

📘 Q244. The consistency of cement is tested by?

• (1) Vicat apparatus – Correct.
• (2) Le Chatelier – Soundness.
• (3) Briquette – Tensile strength.
• (4) Slump cone – Concrete workability.

📘 Q245. Super-elevation on roads is provided to counter?

• (1) Centrifugal force – Correct.
• (2) Friction – No.
• (3) Wind – No.
• (4) Gradient – No.

📘 Q246. A transition curve is usually a?

• (1) Spiral – Correct.
• (2) Ellipse – No.
• (3) Circle – Not transition.
• (4) Parabola – Rarely used.

📘 Q247. The minimum percentage of steel in RCC slab?

• (1) 0.12% (HYSD bars) – Correct.
• (2) 1% – Too high.
• (3) 2% – Unnecessary.
• (4) 0.02% – Very low.

📘 Q248. Aqueduct is a structure that?

• (1) Carries canal over a drainage – Correct.
• (2) Carries drainage over canal – Siphon.
• (3) Diverts flow – Not exactly.
• (4) Stores water – No.

📘 Q249. The minimum diameter of a dowel bar?

• (1) 16 mm – Correct.
• (2) 10 mm – Too small.
• (3) 25 mm – Used for heavy loads.
• (4) 8 mm – Not used.

📘 Q250. Light compaction rollers are?

• (1) Sheep foot rollers – Heavy.
• (2) Smooth wheel rollers – Correct.
• (3) Pneumatic rollers – Heavy.
• (4) Vibratory rollers – Heavy.

📘 Q251. The unit of kinematic viscosity?

• (1) m²/s – Correct.
• (2) m/s – Velocity.
• (3) m³/s – Flow rate.
• (4) N/m² – Pressure.

📘 Q252. The type of surveying used for small areas?

• (1) Plane surveying – Correct.
• (2) Geodetic surveying – Large areas.
• (3) Hydrographic surveying – Water bodies.
• (4) Aerial surveying – Large-scale mapping.

📘 Q253. The hardness in water is caused by?

• (1) Calcium & magnesium salts – Correct.
• (2) Silica – No.
• (3) Iron – Color issue.
• (4) Sulphur – Odor.

📘 Q254. A chajja is provided for?

• (1) Protection from sun/rain – Correct.
• (2) Decoration – Secondary.
• (3) Structural support – No.
• (4) Foundation support – No.

📘 Q255. The curve provided on summit of road?

• (1) Convex vertical curve – Correct.
• (2) Concave curve – Used for valleys.
• (3) Horizontal curve – Not vertical.
• (4) Spiral – Transition horizontal.

📘 Q256. The noise pollution level is expressed in?

• (1) Decibels – Correct.
• (2) NTU – Turbidity.
• (3) ppm – Concentration.
• (4) BOD – Water pollution.

📘 Q257. The best shape of water tank?

• (1) Circular – Most economical.
• (2) Square – Higher stress.
• (3) Rectangular – More steel needed.
• (4) Triangular – Not used.

📘 Q258. The minimum width of a stair tread?

• (1) 300 mm – Correct.
• (2) 150 mm – Too small.
• (3) 450 mm – Too large.
• (4) 75 mm – No.

📘 Q259. A rain gauge measures?

• (1) Rainfall depth – Correct.
• (2) Water velocity – No.
• (3) Humidity – No.
• (4) Evaporation – No.

📘 Q260. The minimum freeboard for small tanks?

• (1) 0.3 m – Correct.
• (2) 1 m – Too high.
• (3) 2 m – Very high.
• (4) 0.05 m – Insufficient.

✔ Part 14 (Q261–Q280) ready on request.