Chapter 3 - Excavating & lifting

Question 1

Excavator

Answer 1

power driven digging machine designed to excavate below grade

Question 2

Types of excavators

Answer 2

Hydraulic
Cable-operated crane-shovel
(dozers/ scrapers/ loaders)

Question 3

Advantages of hydraulic over cable operated machines

Answer 3

faster cycle time
higher bucket penetrating force
more precise digging
easier operator control

Question 4

3 major assemblies of excavators

Answer 4

Carrier/ mounting
Revolving superstructure (contains power unit)
Front-end

Question 5

Carriers available in ___ of excavator

Answer 5

Crawler
Truck
Wheel mounting

Question 6

Crawler

Answer 6

provides on-site mobility in area with low trafficability
used for trenching / rock excavations