Airef Engineers Interview Questions and Answers

To draw the Dia of a manhole, measure the distance across the widest part of the opening.

• Measure the distance across the widest part of the manhole opening

• Use a measuring tape or ruler to get an accurate measurement

• Record the measurement in inches or centimeters

• Use the measurement to draw a circle with a compass or a round object as a guide

The diameter of a 2-lane NATM tunnel varies depending on the specific project requirements and regulations.

• The diameter of a 2-lane NATM tunnel typically ranges from 10 to 15 meters.

• The specific diameter will be determined by factors such as traffic volume, ventilation requirements, and geological conditions.

• For example, a tunnel in a densely populated urban area may have a smaller diameter to minimize surface disrupti...read more