SATURDAY WEEKLY EXAM (14/06/2025)

Which part of a bridge resists the lateral forces and transfers load to the foundation?

• Deck slab
• Abutment
• Pier cap
• Superstructure

Answer explanation

Abutments resist lateral earth pressure and transmit vertical and horizontal loads to the foundation.

Assertion (A): Trussed bridges are used for long spans. Reason (R): Trusses are lightweight and can span long distances economically.

• Both A and R are true, and R is the correct explanation of A.
• Both A and R are true, but R is not the correct explanation of A.
• A is true but R is false.
• A is false but R is true.

Answer explanation

Trussed bridges provide structural efficiency and are ideal for long spans due to light weight and high strength.

What is the main purpose of providing a baffle wall in a septic tank?

• To increase storage capacity
• To reduce odour
• To prevent scum from entering the outlet
• To increase turbulence

Answer explanation

The baffle wall helps trap floating solids and scum, preventing them from reaching the outlet chamber.

Which element in sewage treatment removes solid waste by settling?

• Screen chamber
• Grit chamber
• Sedimentation tank
• Chlorination tank

Answer explanation

Sedimentation tanks allow suspended solids to settle by gravity, clarifying the wastewater.

In RCC, what is the function of cover blocks?

• To reduce concrete volume
• To increase the bending moment
• To maintain specified concrete cover to reinforcement
• To increase steel quantity

Answer explanation

Cover blocks ensure the required distance between the reinforcement and the concrete surface for durability.

Which part of the total station stores coordinate data?

• Prism
• EDM
• Control panel
• Microprocessor memory

Answer explanation

Measured distances and angles are processed and stored in the instrument's microprocessor memory.

Which component in sewerage system prevents entry of foul gases?

• Inspection chamber
• Catch basin
• Vent pipe
• Trap

Answer explanation

Traps retain water seal and prevent foul gases from entering into houses from sewers.

Statement 1: A sump well is used in pumping schemes. Statement 2: It stores water from infiltration gallery.

• Both statements are true.
• Only Statement 1 is true.
• Only Statement 2 is true.
• Both statements are false.

Answer explanation

Sump wells collect water before being pumped, often from infiltration galleries or other intakes.

Which property of cement increases with time?

• Fineness
• Initial setting time
• Strength
• Soundness

Answer explanation

Cement continues to gain strength over time due to ongoing hydration reactions.

Assertion (A): Cohesive soils have high angle of repose. Reason (R): Shear strength in cohesive soils depends only on internal friction.

• Both A and R are true and R is the correct explanation
• Both A and R are true but R is not the correct explanation
• A is true but R is false
• A is false but R is true

Answer explanation

Shear strength in cohesive soils also includes cohesion, not just friction.