D58 MASTER THE DAY

Which sewer section is outdated and not generally used today?

• Basket handle
• Parabolic
• U-shaped
• Semi-circular

Answer explanation

Basket handle section is no longer in use for modern sewer construction.

Which material is used in sewers and is painted with coal tar for corrosion protection?

• RCC
• Cast iron
• Steel
• Asbestos

Answer explanation

Cast iron pipes are coated with coal tar to prevent corrosion.

Which sewer pipe material is cheapest but weak in tension?

• Plastic
• Stoneware
• Steel
• Lead

Answer explanation

Stoneware is cheap and durable, but weak in tension and brittle.

What is the maximum size of aggregate used in PCC sewers?

• 6 mm
• 10 mm
• 20 mm
• 12 mm

Answer explanation

PCC for sewer construction uses 6 mm aggregate for fine compaction.

Which system is most suitable for hilly regions?

• Combined system
• Separate system
• Partially combined system
• Dry system

Answer explanation

Separate system is ideal for areas with uneven terrain and rainfall.

Which sewer connects buildings to the public sewer system?

• Main sewer
• Lateral sewer
• House sewer
• Sub-main sewer

Answer explanation

House sewer is the first connection point for domestic wastewater.

Which sewer material is strong, impervious and used for pressure mains?

• Plastic
• Lead
• Steel
• Brick

Answer explanation

Steel pipes are strong and capable of withstanding high pressure.

Which type of sewer is used to carry flow from collecting system to treatment?

• Main sewer
• Outfall sewer
• Relief sewer
• Intercepting sewer

Answer explanation

Outfall sewer transfers collected sewage to treatment plants.

What is the typical concrete mix used for RCC sewer construction?

• 1:2:4
• 1:1.5:3
• 1:3:6
• 1:2:2

Answer explanation

1:1.5:3 mix is recommended for RCC sewer pipes.

Which type of sewer deals with domestic and industrial waste but not rainwater?

• Combined sewer
• Storm sewer
• Sanitary sewer
• Trunk sewer

Answer explanation

Sanitary sewer carries domestic and industrial wastewater only.