CPCS A47 A48 Piling Rig - Bored Practice Questions - CPCS A47 A48 Piling Rig - Bored (NOCN CPCS, UK) Exam

What is the primary function of a telescopic Kelly bar on a rotary bored piling rig?

To transfer torque and downward crowd force from the rotary drive to the drilling tool at variable depths To pump high-pressure concrete continuously into the borehole from the bottom up To vibrate temporary casings into soft ground formations without using rotary torque To act as the main counterweight for stabilizing the mast during heavy lifting operations

Correct Answer:

To transfer torque and downward crowd force from the rotary drive to the drilling tool at variable depths

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