What classification of surveying implements would include tools such as hand levels and dumpy levels?

The classification of surveying implements that includes hand levels and dumpy levels is leveling instruments. These tools are specifically designed for determining horizontal surfaces and measuring vertical distances with precision. Leveling instruments allow surveyors to establish a reference plane and ensure accurate measurements across varying terrain, making them essential for tasks such as constructing foundations, roads, and other infrastructure.

Hand levels are compact devices used primarily for small-scale leveling tasks, while dumpy levels are more robust instruments used for large-scale surveys and are equipped with a telescope for precise line of sight. Both types of leveling instruments utilize a spirit level or optical system to indicate when a surface is level. Their function is distinct from other classifications, such as optical instruments which may include a broader range of tools used for various sighting and alignment tasks, or measurement tools, which encompass a more general range of devices used for measuring distances or angles. Control devices typically refer to instruments that establish control points for a survey, rather than directly measuring levels or elevations. Thus, the correct classification is indeed leveling instruments as it directly pertains to the function these tools serve in surveying.