Which instrument is used to measure angles of slope, tilt, or elevation relative to gravity?

Which instrument is used to measure angles of slope, tilt, or elevation relative to gravity?

• A. A device for measuring linear displacement
• B. A device for measuring magnetic fields
• C. An inclinometer
• D. A device for measuring seismic waves

Answer: (C)

An inclinometer is used to measure angles of slope, tilt, or elevation relative to gravity. It works by sensing the direction of gravity to determine how steeply something is tilted from horizontal. In practice, it can be a pendulum- or fluid-based device, or a modern MEMS sensor, that outputs an angle relative to a level reference. This makes it ideal for quantifying the tilt of rock layers, slopes, tunnel alignments, or boreholes—situations where gravity provides a stable reference point. Other instruments mentioned measure different physical properties: a device for linear displacement tracks movement in a straight line, a device for measuring magnetic fields detects magnetic forces, and a device for measuring seismic waves is a seismometer. None of these directly provide the tilt angle relative to gravity like an inclinometer does.

An inclinometer is used to measure angles of slope, tilt, or elevation relative to gravity. It works by sensing the direction of gravity to determine how steeply something is tilted from horizontal. In practice, it can be a pendulum- or fluid-based device, or a modern MEMS sensor, that outputs an angle relative to a level reference. This makes it ideal for quantifying the tilt of rock layers, slopes, tunnel alignments, or boreholes—situations where gravity provides a stable reference point.

Other instruments mentioned measure different physical properties: a device for linear displacement tracks movement in a straight line, a device for measuring magnetic fields detects magnetic forces, and a device for measuring seismic waves is a seismometer. None of these directly provide the tilt angle relative to gravity like an inclinometer does.