NCCCO Digger Derrick Operator Certification Exam Preparation (UPDATED 2026) – Practice Questions with Verified Answers and Rationales Complete Study Guide Instant Download Pdf

NCCCO Digger Derrick Operator
Certification Exam Preparation
(UPDATED 2026) – Practice Questions
with Verified Answers and Rationales
Complete Study Guide Instant Download
Pdf
What does the white flag represent? -CORRECTANSWER Proposed excavation



What does the pink flag represent? -CORRECTANSWER Temporary Survey Markings



What does the red flag represent? -CORRECTANSWER Electric power lines, cables,

and conduits



What does the yellow flag represent? -CORRECTANSWER Gas, oil, steam, petroleum,

and gaseous materials



What does the orange flag represent? -CORRECTANSWER Communications, alarms,

or signal lines



What does the blue flag represent? -CORRECTANSWER Potable water

, What does the purple flag represent? -CORRECTANSWER Reclaimed water, irrigation,

slurry lines



What does the green flag represent? -CORRECTANSWER Sewers and drain lines



What does the OSHA standard say in 1926.959a2? -CORRECTANSWER The critical

safety components of mechanical elevating and rotating equipment shall receive a

thorough visual inspection before use on each shift



At minimum, what should be done for a critical component check? -

CORRECTANSWER Raise the boom and rotate both ways to verify proper operation

then extend/retract



What is the number for call before you dig and what information do you need to know? -

CORRECTANSWER 811 contact information, location of the dig, and type of work



What is a tolerance zone used for? -CORRECTANSWER To use prudent excavation

techniques



What are prudent excavation techniques? -CORRECTANSWER Digging by hand or

vacuum excavation



What does TTC stand for? -CORRECTANSWER Temporary Traffic Control