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

Question 1

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

Question 2

How does a mechanical locking Kelly bar differ from a friction Kelly bar during drilling operations?

Mechanical locking Kelly bars feature drive pocket locks to transfer maximum crowd force in hard rock, whereas friction Kelly bars rely on friction between sections Friction Kelly bars can only be used for drilling in hard granite, while mechanical locking Kelly bars are limited to soft clay Mechanical locking Kelly bars do not retract telescopically and must be removed in one piece Friction Kelly bars automatically clean the auger flights during extraction without operator input

Correct Answer:

Mechanical locking Kelly bars feature drive pocket locks to transfer maximum crowd force in hard rock, whereas friction Kelly bars rely on friction between sections

Question 3

What component on a piling rig mast guides and supports the upper end of a telescopic Kelly bar?

Swivel and upper Kelly guide (cathead assembly) Casing oscillator torque arm Crowd cylinder piston rod end Concrete flow meter manifold

Correct Answer:

Swivel and upper Kelly guide (cathead assembly)

Question 4

In Continuous Flight Auger (CFA) piling, what is the purpose of the hollow stem inside the auger flight?

To allow concrete to be pumped down to the tip of the auger while it is being extracted To collect soil samples automatically during drilling for geotechnical testing To circulate cooling water to prevent the drill teeth from overheating in rock To house the main auxiliary winch cable for lifting reinforcement cages

Correct Answer:

To allow concrete to be pumped down to the tip of the auger while it is being extracted

Question 5

Why must the bottom cap (bung or flap) of a CFA auger open cleanly when concrete pumping commences?

To allow pressurized concrete to flow out of the stem and seal the base of the bore against soil collapse To allow ground water to enter the auger stem and dilute the concrete mix To lock the auger flights against the surrounding soil during rotation To release hydraulic oil from the Kelly bar into the bore hole

Correct Answer:

To allow pressurized concrete to flow out of the stem and seal the base of the bore against soil collapse

Question 1

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Prepare with the CPCS A47 A48 Piling Rig - Bored Practice Questions - CPCS A47 A48 Piling Rig - Bored (NOCN CPCS, UK) Exam practice quiz. This question bank includes 100 questions covering piling, rotary, operator, bored, and drilling. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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

This practice set contains 100 questions from the matching question bank and focuses on piling, rotary, operator, bored, and drilling. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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

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