APPROVED NGWA CABLE TOOL DRILLING EXAM A/B/NGWA
CABLE TOOL DRILLING EXAM A/B ACTUAL PRACTICE EXAM
2026-2027 COMPLETE ACCURATE EXAM REAL QUESTIONS AND
CORRECT VERIFIED ANSWERS WITH DETAILED RATIONALES
(100% RELIABLE ANSWERS) CURRENTLY UPDATED VERSION
EDITION 2026 |GUARANTEED PASS A+ (BRAND NEW!!)
|INSTANT DOWNLOAD PDF
What is the fundamental drilling action used by a cable-tool rig?
A. Continuous rotation of a bit
B. Percussion produced by repeatedly lifting and dropping the tools
C. Hydraulic jetting
D. Continuous reverse circulation
ANSWER: B. Percussion produced by repeatedly lifting and dropping the tools
Rationale: Cable-tool drilling breaks formation primarily through percussion. The
drill tools are raised and allowed to fall, transferring impact energy to the bit.
Rotary cutting and hydraulic jetting describe other drilling methods.
Which rig component converts rotary motion from the power source into the
reciprocating motion of the drilling tools?
,A. Walking beam
B. Sand line
C. Bailer
D. Casing shoe
ANSWER: A. Walking beam
Rationale: The walking beam oscillates vertically and transmits the reciprocating
motion necessary for the cable-tool drilling stroke. The sand line handles the bailer,
while the casing shoe guides casing.
What is the primary function of the drilling line?
A. Circulate drilling fluid
B. Suspend and operate the drill tools
C. Remove formation water
D. Measure formation pressure
ANSWER: B. Suspend and operate the drill tools
Rationale: The drilling line supports and raises the cable-tool string. It must
withstand repeated shock loading and the weight of the tools.
What is the primary purpose of the sand line?
,A. Operate the bailer
B. Rotate the drill stem
C. Drive the casing
D. Support the derrick
ANSWER: A. Operate the bailer
Rationale: The sand line is generally a separate line used to raise and lower the
bailer during removal of cuttings and water from the borehole.
Why is a heavy drill stem used in a cable-tool string?
A. To circulate mud
B. To add weight and maintain effective impact at the bit
C. To rotate the bit
D. To filter formation water
ANSWER: B. To add weight and maintain effective impact at the bit
Rationale: The drill stem provides mass directly above the bit. This weight helps
transmit percussion energy and maintain a controlled drilling action.
What is the principal purpose of a cable-tool bit?
, A. To pump water
B. To crush and fracture the formation
C. To circulate drilling mud
D. To measure borehole temperature
ANSWER: B. To crush and fracture the formation
Rationale: The bit receives repeated impact from the falling tool string. Its cutting
edge concentrates that force against the formation.
A driller notices that the tools are not maintaining an effective stroke. Which factor
should be evaluated first?
A. Paint color of the rig
B. Tool-string adjustment and stroke conditions
C. Well-house ventilation
D. Static water chemistry
ANSWER: B. Tool-string adjustment and stroke conditions
Rationale: Poor drilling performance can result from improper tool adjustment,
insufficient stroke, excessive or inadequate cable tension, or unsuitable operating
conditions. Mechanical drilling variables should be evaluated before unrelated
factors.
What is the primary purpose of a drilling jar?
CABLE TOOL DRILLING EXAM A/B ACTUAL PRACTICE EXAM
2026-2027 COMPLETE ACCURATE EXAM REAL QUESTIONS AND
CORRECT VERIFIED ANSWERS WITH DETAILED RATIONALES
(100% RELIABLE ANSWERS) CURRENTLY UPDATED VERSION
EDITION 2026 |GUARANTEED PASS A+ (BRAND NEW!!)
|INSTANT DOWNLOAD PDF
What is the fundamental drilling action used by a cable-tool rig?
A. Continuous rotation of a bit
B. Percussion produced by repeatedly lifting and dropping the tools
C. Hydraulic jetting
D. Continuous reverse circulation
ANSWER: B. Percussion produced by repeatedly lifting and dropping the tools
Rationale: Cable-tool drilling breaks formation primarily through percussion. The
drill tools are raised and allowed to fall, transferring impact energy to the bit.
Rotary cutting and hydraulic jetting describe other drilling methods.
Which rig component converts rotary motion from the power source into the
reciprocating motion of the drilling tools?
,A. Walking beam
B. Sand line
C. Bailer
D. Casing shoe
ANSWER: A. Walking beam
Rationale: The walking beam oscillates vertically and transmits the reciprocating
motion necessary for the cable-tool drilling stroke. The sand line handles the bailer,
while the casing shoe guides casing.
What is the primary function of the drilling line?
A. Circulate drilling fluid
B. Suspend and operate the drill tools
C. Remove formation water
D. Measure formation pressure
ANSWER: B. Suspend and operate the drill tools
Rationale: The drilling line supports and raises the cable-tool string. It must
withstand repeated shock loading and the weight of the tools.
What is the primary purpose of the sand line?
,A. Operate the bailer
B. Rotate the drill stem
C. Drive the casing
D. Support the derrick
ANSWER: A. Operate the bailer
Rationale: The sand line is generally a separate line used to raise and lower the
bailer during removal of cuttings and water from the borehole.
Why is a heavy drill stem used in a cable-tool string?
A. To circulate mud
B. To add weight and maintain effective impact at the bit
C. To rotate the bit
D. To filter formation water
ANSWER: B. To add weight and maintain effective impact at the bit
Rationale: The drill stem provides mass directly above the bit. This weight helps
transmit percussion energy and maintain a controlled drilling action.
What is the principal purpose of a cable-tool bit?
, A. To pump water
B. To crush and fracture the formation
C. To circulate drilling mud
D. To measure borehole temperature
ANSWER: B. To crush and fracture the formation
Rationale: The bit receives repeated impact from the falling tool string. Its cutting
edge concentrates that force against the formation.
A driller notices that the tools are not maintaining an effective stroke. Which factor
should be evaluated first?
A. Paint color of the rig
B. Tool-string adjustment and stroke conditions
C. Well-house ventilation
D. Static water chemistry
ANSWER: B. Tool-string adjustment and stroke conditions
Rationale: Poor drilling performance can result from improper tool adjustment,
insufficient stroke, excessive or inadequate cable tension, or unsuitable operating
conditions. Mechanical drilling variables should be evaluated before unrelated
factors.
What is the primary purpose of a drilling jar?
