D46 MASTER THE DAY

The tracing point in a planimeter is used to:

• Hold the instrument
• Fix the anchor
• Trace the boundary of the area
• Measure time

Answer explanation

The tracing point is moved along the boundary to measure area.

Which method is most suitable for plotting cross-section of a road?

• Average ordinate method
• Graphical method
• Prismoidal rule
• Cross-staff method

Answer explanation

Graphical method is effective for irregular cross-sections like roads.

EDM instrument that uses modulated light is known as:

• Laser EDM
• Microwave EDM
• Infrared EDM
• Total Station

Answer explanation

Laser EDM uses modulated light for precise measurement.

What is the key advantage of using a total station?

• Manual reading
• Only angle measurement
• Combined distance and angle measurement
• Used in water surveying

Answer explanation

Total station provides both distance and angle in a single device.

Zero circle in a planimeter refers to:

• The smallest possible area
• Where the wheel rolls freely
• Where the wheel does not rotate
• Maximum range

Answer explanation

On the zero circle, the measuring wheel doesn’t rotate.

Which of the following is a digital area-measuring device?

• Planimeter
• Total station
• GPS
• Digital planimeter

Answer explanation

Digital planimeters are modern instruments for area computation.

Which EDM device works well for short-range work?

• Laser
• Microwave
• Infrared
• Radar

Answer explanation

Infrared EDM is generally used for distances up to 3 km.

Which of the following is NOT a component of a typical planimeter?

• Tracing arm
• Anchor arm
• EDM sensor
• Measuring wheel

Answer explanation

EDM sensor is not part of a manual/mechanical planimeter.

Which principle does an EDM rely upon for measuring distance?

• Mechanical expansion
• Radioactivity
• Electromagnetic wave propagation
• Capillary rise

Answer explanation

EDM measures the time taken for EM waves to travel and return.

Which survey method is most appropriate for determining the area of a pond?

• Chain survey
• Compass survey
• Planimeter method
• Theodolite method

Answer explanation

A planimeter is ideal for measuring irregular areas like ponds.