MCQs on Manholes

What is the primary function of a manhole in urban infrastructure?

• To improve water pressure

• To provide access for maintenance and inspection

• To increase flow in sewers

• To block unauthorized access

Which material is most commonly used for constructing modern manholes?

• Brick masonry

• Wood

• Reinforced concrete

• Plastic

What is the depth range of a normal or intermediate manhole?

• 0 to 0.5 meters

• 0.75 to 2 meters

• 2 to 4 meters

• Over 5 meters

Which type of manhole is primarily used for shallow sewer lines in residential areas?

• Deep manhole

• Shallow manhole

• Circular manhole

• Ventilated manhole

At what depth is a manhole considered "deep"?

• Greater than 0.5 meters

• Greater than 1 meter

• Greater than 2 meters

• Greater than 5 meters

Which of the following materials is typically used for manhole covers?

• Wood

• Cast iron

• Aluminum

• Plastic

What is the purpose of the invert in a manhole?

• To support the cover

• To allow smooth flow of sewage

• To prevent gas buildup

• To allow worker entry

How often are manholes typically spaced along sewer lines?

• 10 to 20 meters

• 50 to 100 meters

• 90 to 150 meters

• 200 to 300 meters

Which safety feature helps prevent hazardous gas accumulation in manholes?

• Ladder

• Reinforced concrete walls

• Ventilation holes

• Safety grilles

What class of manhole cover is suitable for pedestrian areas?

• Class A

• Class B

• Class C

• Class D