D58 QUIZ OF THE DAY

Which sewer system is considered most hygienic but has a high initial cost?

• Dry system
• Water carriage system
• Conservancy system
• Storm system

Answer explanation

Water carriage system is most hygienic but expensive to install.

What type of sewer carries both sewage and stormwater?

• Separate sewer
• Storm sewer
• Combined sewer
• House sewer

Answer explanation

Combined sewer carries sewage and stormwater in a single pipeline.

Which sewer is laid to collect sewage from several lateral sewers?

• House sewer
• Main sewer
• Sub-main sewer
• Outfall sewer

Answer explanation

Sub-main sewer receives flow from multiple lateral sewers.

Which sewer section is best suited for separate systems and is most commonly used?

• Egg-shaped
• Circular
• Rectangular
• Parabolic

Answer explanation

Circular section is most commonly used in separate sewer systems.

Which material is most suitable for house or lateral sewers?

• Cast iron
• RCC
• Stoneware
• Steel

Answer explanation

Stoneware is cheap, corrosion-resistant, and used in house sewers.

What type of sewer bypasses an obstruction using a lower elevation pipe?

• Outfall sewer
• Intercepting sewer
• Depressed sewer
• Relief sewer

Answer explanation

Depressed sewers help bypass obstacles using inverted siphon designs.

Which city is given as an example of separate system usage?

• Chennai
• Mumbai
• Pune
• Rajasthan

Answer explanation

Mumbai, a hilly area, is an example where separate system is suitable.

Which material is costlier but used for inverted siphons and pumping mains?

• Cast iron
• Brick
• Plastic
• Wooden

Answer explanation

Cast iron is strong, durable, corrosion-resistant, and used in pressure pipes.

Which sewer section shape is mostly used for tunnels and large outfalls?

• Parabolic
• U-shaped
• Horse-shoe
• Basket-handle

Answer explanation

Horse-shoe shape is used for high-discharge tunnels and outfalls.

Which material cannot be used for pressure pipes due to its brittleness?

• Stoneware
• RCC
• Cast iron
• Steel

Answer explanation

Stoneware is brittle and not suitable for use under pressure.