1
TTT-1 Certification Exam Study Guide –
Comprehensive Questions and Answers A+
Graded.
Domain I: Introduction to Trenchless Technology (8 Questions)
1. Which of the following best defines "Trenchless Technology"?
A. Methods of installing pipes without any digging or excavation.
B. A family of methods for installing, rehabilitating, or replacing underground
infrastructure with minimal surface excavation.
C. Excavation techniques limited to microtunneling only.
D. The use of horizontal directional drilling for all utility installations.
2. Which of the following is NOT considered a primary benefit of using trenchless
methods over open-cut excavation?
A. Reduced surface disruption and traffic delays.
B. Lower social cost regarding noise and dust.
C. Elimination of the need for geotechnical investigation.
D. Lower restoration costs (pavement, landscaping).
3. Which trenchless category is described as "installing a new pipe without open
trenching"?
A. Rehabilitation
B. Replacement
C. New Installation
D. Pipe Bursting
4. In the context of site investigation, what is the primary purpose of "Subsurface
Utility Engineering (SUE)"?
A. To determine the soil classification and groundwater levels.
B. To identify and map the horizontal and vertical location of existing underground
utilities.
C. To design the bore path for the drill rig.
D. To obtain permits for traffic control.
5. Which excavation is defined as the location where drilling or tunneling equipment
enters the ground?
A. Reception Pit
B. Exit Pit
, 2
C. Entry Pit (Launch Pit)
D. Thrust Block
6. What is the "Annular Space" in a trenchless installation?
A. The space inside the pipe where flow occurs.
B. The gap between the borehole wall and the pipe being installed.
C. The depth of the drill bit below the surface.
D. The area between the entry and exit pits.
7. Which trenchless method involves breaking an existing pipe outward and pulling
in a new pipe simultaneously?
A. CIPP
B. Pipe Bursting
C. Slip Lining
D. Microtunneling
8. What is the "Spoil"?
A. The drilling fluid used in HDD.
B. The excavated soil or rock removed from the borehole.
C. The lubricant used in pipe jacking.
D. The waste resin from CIPP installation.
Domain II: Horizontal Directional Drilling (HDD) (12 Questions)
9. What is the correct sequence of the three stages of HDD?
A. Pullback, Pilot Bore, Pre-ream
B. Pre-ream, Pilot Bore, Pullback
C. Pilot Bore, Pre-ream, Pullback
D. Pilot Bore, Pullback, Pre-ream
10. During the Pilot Bore stage, which parameter indicates the orientation (clockwise
position) of the drill bit cutting head?
A. Pitch
B. Azimuth
C. Roll (Tool Face)
D. Inclination
11. What is the primary function of the drilling fluid (mud) in an HDD operation?
A. To increase the speed of the drill rig.
B. To cool the electronic components located on the surface.
TTT-1 Certification Exam Study Guide –
Comprehensive Questions and Answers A+
Graded.
Domain I: Introduction to Trenchless Technology (8 Questions)
1. Which of the following best defines "Trenchless Technology"?
A. Methods of installing pipes without any digging or excavation.
B. A family of methods for installing, rehabilitating, or replacing underground
infrastructure with minimal surface excavation.
C. Excavation techniques limited to microtunneling only.
D. The use of horizontal directional drilling for all utility installations.
2. Which of the following is NOT considered a primary benefit of using trenchless
methods over open-cut excavation?
A. Reduced surface disruption and traffic delays.
B. Lower social cost regarding noise and dust.
C. Elimination of the need for geotechnical investigation.
D. Lower restoration costs (pavement, landscaping).
3. Which trenchless category is described as "installing a new pipe without open
trenching"?
A. Rehabilitation
B. Replacement
C. New Installation
D. Pipe Bursting
4. In the context of site investigation, what is the primary purpose of "Subsurface
Utility Engineering (SUE)"?
A. To determine the soil classification and groundwater levels.
B. To identify and map the horizontal and vertical location of existing underground
utilities.
C. To design the bore path for the drill rig.
D. To obtain permits for traffic control.
5. Which excavation is defined as the location where drilling or tunneling equipment
enters the ground?
A. Reception Pit
B. Exit Pit
, 2
C. Entry Pit (Launch Pit)
D. Thrust Block
6. What is the "Annular Space" in a trenchless installation?
A. The space inside the pipe where flow occurs.
B. The gap between the borehole wall and the pipe being installed.
C. The depth of the drill bit below the surface.
D. The area between the entry and exit pits.
7. Which trenchless method involves breaking an existing pipe outward and pulling
in a new pipe simultaneously?
A. CIPP
B. Pipe Bursting
C. Slip Lining
D. Microtunneling
8. What is the "Spoil"?
A. The drilling fluid used in HDD.
B. The excavated soil or rock removed from the borehole.
C. The lubricant used in pipe jacking.
D. The waste resin from CIPP installation.
Domain II: Horizontal Directional Drilling (HDD) (12 Questions)
9. What is the correct sequence of the three stages of HDD?
A. Pullback, Pilot Bore, Pre-ream
B. Pre-ream, Pilot Bore, Pullback
C. Pilot Bore, Pre-ream, Pullback
D. Pilot Bore, Pullback, Pre-ream
10. During the Pilot Bore stage, which parameter indicates the orientation (clockwise
position) of the drill bit cutting head?
A. Pitch
B. Azimuth
C. Roll (Tool Face)
D. Inclination
11. What is the primary function of the drilling fluid (mud) in an HDD operation?
A. To increase the speed of the drill rig.
B. To cool the electronic components located on the surface.
