🧱 KPSC JE Civil – Solved Questions (Part 8: Q141–Q160)

This part contains questions 141 to 160 with complete option-wise explanations.

📘 Q141. Hydration of cement results in?

• (1) Heat generation – Correct. Exothermic reaction.
• (2) Temperature reduction – No.
• (3) No change – Incorrect.
• (4) Cooling of cement – No.

📘 Q142. The process of removing air bubbles from concrete?

• (1) Floating – Finishing action.
• (2) Screeding – Leveling.
• (3) Consolidation/Vibration – Correct.
• (4) Floating – Repeated.

📘 Q143. A canal head regulator is provided at?

• (1) Canal falls – No.
• (2) Reservoir exit – No.
• (3) Offtake of canal from headworks – Correct.
• (4) Canal cross drainage – No.

📘 Q144. A plastic limit test determines?

• (1) Water content at which soil crumbles – Correct.
• (2) Water content of flow – Liquid limit.
• (3) Water content of shrinkage – Shrinkage limit.
• (4) Soil density – No.

📘 Q145. The most efficient channel section is?

• (1) Semi-circular – Correct. Max hydraulic radius.
• (2) Rectangular – Not most efficient.
• (3) Square – No.
• (4) Trapezoidal – Common but not most efficient.

📘 Q146. A beam fails mainly due to?

• (1) Bending – Correct.
• (2) Torsion – Only in special cases.
• (3) Buckling – Columns.
• (4) Fatigue – Long-term effect.

📘 Q147. A spillway is located in?

• (1) Dam body – Correct.
• (2) Canal – No.
• (3) Aqueduct – No.
• (4) Channel – No.

📘 Q148. Lap length in tension (Fe415) as per IS 456?

• (1) 24d – Too small.
• (2) 30d – Still small.
• (3) 40d – Correct.
• (4) 60d – Not standard.

📘 Q149. Brick with water absorption less than 20% is?

• (1) First class brick – Correct.
• (2) Second class – Absorption higher.
• (3) Third class – Poor quality.
• (4) Sundried – Very weak.

📘 Q150. Gauge used for measuring pressure in pipes?

• (1) Barometer – Atmospheric pressure.
• (2) Piezometer – Static head.
• (3) Bourdon gauge – Correct.
• (4) Anemometer – Wind speed.

📘 Q151. The angle of repose is?

• (1) Max slope of loose soil – Correct.
• (2) Max safe slope – Similar but not same.
• (3) 45° for all soils – Incorrect.
• (4) Slope of river – No.

📘 Q152. Permanent hardness is caused by?

• (1) Calcium bicarbonate – Temporary.
• (2) Magnesium bicarbonate – Temporary.
• (3) Sulphates and chlorides – Correct.
• (4) Dissolved gases – No.

📘 Q153. A fish ladder is provided in?

• (1) Dams – Correct. Helps fish migration.
• (2) Canals – No.
• (3) Barrages – Occasionally but mainly dams.
• (4) Tunnels – No.

📘 Q154. The main constituent increasing cement strength?

• (1) C₃S – Correct. Early strength.
• (2) C₂S – Later strength.
• (3) C₃A – Fast reaction, low strength.
• (4) C₄AF – Little effect.

📘 Q155. Unit of permeability coefficient?

• (1) m/s – Correct.
• (2) m² – No.
• (3) N/m² – Pressure.
• (4) m³ – Volume.

📘 Q156. The least count of a theodolite?

• (1) 5' – Correct.
• (2) 1° – Very coarse.
• (3) 30' – Large.
• (4) 10° – No.

📘 Q157. The bearing capacity of soil increases with?

• (1) Increase in compaction – Correct.
• (2) Increase in void ratio – Decreases SBC.
• (3) Increase in moisture (clay) – Decreases.
• (4) Increase in organic matter – Decreases.

📘 Q158. The settling velocity of particles depends on?

• (1) Particle size – Yes.
• (2) Fluid viscosity – Yes.
• (3) Particle density – Yes.
• (4) All of the above – Correct.

📘 Q159. The ability of soil to allow roots to penetrate is?

• (1) Fertility – Nutrition.
• (2) Porosity – Storage of air/water.
• (3) Permeability – Water flow.
• (4) Tilth – Correct. Soil workability.

📘 Q160. The velocity head is equal to?

• (1) V²/2g – Correct.
• (2) V/g – No.
• (3) V²/g – No.
• (4) g/V – No.

✔ Part 9 (Q161–Q180) available on request.