Which are the main categories of cranes?

• A. Hydraulic, Rough Terrain, Conventional
• B. Lattice, Telescoping, Floating
• C. Mobile, Tower, Floating
• D. Manual, Pneumatic, Electric

Answer: (A)

In crane classification for field use, the grouping is based on how the crane is powered and how it moves on site. The three main groups you’re expected to recognize are hydraulic, rough terrain, and conventional.

Hydraulic cranes use fluid power to lift and maneuver the boom, and they cover a wide range of sizes and configurations, making them the most common type in many operations. Rough terrain cranes are a subset of mobile cranes designed specifically for uneven or debris-covered ground, using outriggers and specialized tires or tracks to stabilize on challenging surfaces. Conventional cranes refer to the traditional, non-hydraulic or classic designs such as lattice-boom or fixed-base cranes, which represent the older but still-used end of crane technology.

Other options mix specific boom configurations (like lattice, telescoping, or floating) or pair mobility with structure (mobile, tower, floating) or list power methods (manual, pneumatic, electric) that aren’t the broad, practical categories used in US&R field practice. So the best-match grouping for main crane categories is hydraulic, rough terrain, and conventional.