Question

nccer 22201 - 12 - introduction to earthmoving
which machine would be used for a limited - area vertical excavation?
power shovel
backhoe
clamshell
trench

Explanation:

A clamshell excavator is well - suited for limited - area vertical excavation as it has a vertically operating bucket that can dig downwards in a relatively small footprint area. Power shovels are more for large - scale excavation and moving of earth. Backhoes are typically used for digging trenches and general excavation in open areas. A trench is not a machine but a type of excavation.

Answer:

C. Clamshell