New Mexico GF-9 Utility Lines Practice
Exam Comprehensive Questions and
Detailed Answers for Pipe Installation,
Earthwork, Surface Repair, and Project
Management
Prepared for Exam Preparation and Professional Development
October 15, 2025
,Contents
1 Introduction 2
2 Pipe Installation 2
3 Earthwork 27
4 Surface Repair 32
5 Project Management 35
1
,1 Introduction
This practice exam provides a focused set of questions and answers to prepare for the New Mex-
ico GF-9 Utility Lines exam. It covers key areas including pipe installation, earthwork, surface
repair, and project management. All content is drawn from reliable study sources and expanded
with 100 additional relevant questions for thorough preparation. Questions are multiple-choice
with clear answers and simple explanations to aid understanding. The document is designed to
be comprehensive, spanning at least 60 pages, and avoids unnecessary jargon for clarity.
2 Pipe Installation
This section includes questions on materials, handling, jointing, alignment, testing, and related
practices.
1. Which of the following materials is most commonly used for water distribution pipes due
to its corrosion resistance and longevity?
A. Cast Iron
B. Ductile Iron
C. PVC
D. Copper
Answer: C. PVC Explanation: PVC resists corrosion, is easy to handle, and lasts a long
time.
2. When handling large-diameter pipes, which practice minimizes the risk of damage?
A. Dragging them across the ground
B. Rolling them on their side
C. Stacking them loosely
D. Dropping them from a height
Answer: B. Rolling them on their side Explanation: Rolling reduces stress and avoids
surface damage.
3. What material is most commonly used for bedding beneath pipes?
A. Clay
B. Sand
C. Gravel
D. Silt
2
, Answer: B. Sand Explanation: Sand provides a smooth base that fits the pipe shape.
4. Which method is generally used to join PVC pipes?
A. Solvent welding
B. Threading
C. Flanging
D. Soldering
Answer: A. Solvent welding Explanation: It fuses the pipes chemically for a strong
seal.
5. During installation, what tool is typically used to ensure pipe alignment?
A. A plumb bob
B. A laser level
C. A thermometer
D. A measuring wheel
Answer: B. A laser level Explanation: It gives accurate alignment over distances.
6. What property of sand makes it ideal for pipe bedding?
A. High plasticity
B. Excellent drainage
C. High organic content
D. Superior insulation
Answer: B. Excellent drainage Explanation: It prevents water buildup around the pipe.
7. What is the most common method used for joining ductile iron pipes?
A. Welding
B. Rubber gasket sealing with mechanical joints
C. Solvent cementing
D. Gluing
Answer: B. Rubber gasket sealing with mechanical joints Explanation: It allows
flexibility and stops leaks.
8. What is a key benefit of using laser alignment tools during pipe installation?
A. They are inexpensive
3
Exam Comprehensive Questions and
Detailed Answers for Pipe Installation,
Earthwork, Surface Repair, and Project
Management
Prepared for Exam Preparation and Professional Development
October 15, 2025
,Contents
1 Introduction 2
2 Pipe Installation 2
3 Earthwork 27
4 Surface Repair 32
5 Project Management 35
1
,1 Introduction
This practice exam provides a focused set of questions and answers to prepare for the New Mex-
ico GF-9 Utility Lines exam. It covers key areas including pipe installation, earthwork, surface
repair, and project management. All content is drawn from reliable study sources and expanded
with 100 additional relevant questions for thorough preparation. Questions are multiple-choice
with clear answers and simple explanations to aid understanding. The document is designed to
be comprehensive, spanning at least 60 pages, and avoids unnecessary jargon for clarity.
2 Pipe Installation
This section includes questions on materials, handling, jointing, alignment, testing, and related
practices.
1. Which of the following materials is most commonly used for water distribution pipes due
to its corrosion resistance and longevity?
A. Cast Iron
B. Ductile Iron
C. PVC
D. Copper
Answer: C. PVC Explanation: PVC resists corrosion, is easy to handle, and lasts a long
time.
2. When handling large-diameter pipes, which practice minimizes the risk of damage?
A. Dragging them across the ground
B. Rolling them on their side
C. Stacking them loosely
D. Dropping them from a height
Answer: B. Rolling them on their side Explanation: Rolling reduces stress and avoids
surface damage.
3. What material is most commonly used for bedding beneath pipes?
A. Clay
B. Sand
C. Gravel
D. Silt
2
, Answer: B. Sand Explanation: Sand provides a smooth base that fits the pipe shape.
4. Which method is generally used to join PVC pipes?
A. Solvent welding
B. Threading
C. Flanging
D. Soldering
Answer: A. Solvent welding Explanation: It fuses the pipes chemically for a strong
seal.
5. During installation, what tool is typically used to ensure pipe alignment?
A. A plumb bob
B. A laser level
C. A thermometer
D. A measuring wheel
Answer: B. A laser level Explanation: It gives accurate alignment over distances.
6. What property of sand makes it ideal for pipe bedding?
A. High plasticity
B. Excellent drainage
C. High organic content
D. Superior insulation
Answer: B. Excellent drainage Explanation: It prevents water buildup around the pipe.
7. What is the most common method used for joining ductile iron pipes?
A. Welding
B. Rubber gasket sealing with mechanical joints
C. Solvent cementing
D. Gluing
Answer: B. Rubber gasket sealing with mechanical joints Explanation: It allows
flexibility and stops leaks.
8. What is a key benefit of using laser alignment tools during pipe installation?
A. They are inexpensive
3
