Contractor School Online ®
The premiere national online resource to assist you in passing your Contractor License Exam.

Tell a friend!

Email or Call (888)993-9267
Home  |  National Contractor License  |  Request Information  |  Construction Glossary  |  Login

Colorado-Excavating and Underground Utilities Online Practice Test

These are actual questions from our online practice test.

We have included a question from each chapter of the test. Every question will be multiple choice. The answers are not included with the sample.

Sample Questions

# Chapter Title Question
1 Excavating, Drainage, Compaction and Trenching

In accordance with Construction Safety & Health Standards, Federal Standards cite trenches ____ ft. or deeper, should be shored to prevent cave-ins.

2 Excavating and Sitework

A permit may be required prior to starting work, when employees are entering shafts, trenches or excavations more than ____________.

3 Earthworks, Clearing, Excavating and Surveying What are site contours?
4 Excavating and Grading 0
5 Underground Utilities, Drainage, Pipelines and System Location Sites Which is correct regarding the statement, __________ is particularly susceptible t change in moisture.
6 Installation, Pipes, Drainage and Trenches

Ductile iron pipe manufactured in the United States is made of scrap iron and steel — wholly recycled raw materials. Depending on the size of the pipe and the nature of the lining being applied, the recycled content for ductile iron pipe can exceed ________ percent. 

7 Trenchless Technologies What do sewer manhole renewal methods provide?
8 Trenchless Pipeline Construction Methods, Designs and Renewal Methods The installation of CIPP typically improves the flow characteristics of the existing pipe. Why is flow improved in CIPP?
9 Horizontal Auger Boring, Pipe Ramming, Pipe Jacking and Utilitity Tunneling Which of the following statements is correct about constructing a well using the boring method?
10 Micro-Tunneling Methods and Pilot Tube Micro-Tunneling What is the maximum drive length of PTMT?
11 Horizontal Directional Drilling What appears to be the next frontier for HDD?
12 Pipe Materials What should a pipe used for jacking be like?
13 Close-Fit Pipe and Cured In Place Pipe What is used in the thermal swage method?
14 Slip-lining and Modified Grouting operations take place manhole to manhole from downstream to upstream manhole. What does this ensure?
15 Pipe In-Line Replacement, Coatings and Linings Underground What are the ultra high build thicknesses of single coat capability towing to the jagged and deep profiles found on new and deteriorated concrete surfaces?
16 Sanitary Sewers, Storm Sewers and Septic Tanks

 The condensed molecular/chemical formula for ethanol is ________________________________________ 

17 Installation, Pipes, Leach Fields and Tanks Sewer line connections to existing lines or manholes are not made until upstream lines have been _____________.
18 Installation, Joints, Field Elevations, Sewers and Sewer Testing The necessary elevation of the bottom of the tank can be calculated from the _________________.
19 Pipeline Management, Inspection, Cleaning and Coatings and Control Corrosion What is a Vehicle?
20 Localized Repair, Sewer Pipelines, Thermo-formed Pipe and Sewer Manhole Renewal What is the most common cause of severe deterioration in concrete sanitary sewer systems?
21 Maintenance Repair and Sewer Lateral Renewal One way to check the drain field's absorption capacity is to watch how long it takes for _______ gallons of water to run through the tank, with the outlet open, into the drain field.
22 Pipe Welding, Installing and Ductile Iron Pipes

Using direct bury and tunneling, workers installed 4,000 feet of ___________ -inch-diameter HOBAS pipe in Salt Lake County, Utah, at depths from 2 to 26 feet.

23 Welding, Brazing, Arc, Oxyacetylene, Testing and Inspection

In the joining of copper tube, failure to properly heat and fill a joint may lead to a 'void' being formed. This is usually a result of improper placement of the flame.

24 Asphalt Paving, Subsurface, Drainage and Hot-Mix Paving

Record keeping as part of the organization is necessary for a well completed project.  There are several aspects of the projct that are considered at the Preconstruction Conference.  One of the most important in writting and oral communication is __________.

25 Job Safety Traffic Control If a contractor violates the safety code and an employee is injured, who will be held responsible?
26 ADA Parking Requirements Signs displaying "Unauthorized Parking" shall be 17 inches by 22 inches minimum in size with lettering_____inch(es)minimum high.
27 Miscellaneous What is a unit circle?
28 OSHA Safety, Asbestos, Code of Federal Regulations, Fire Extinguishers and Dig Alert

If an emergency notice must be given to Alabama 811 Dig Alert, the utility companies will attempt to respond within _______.

29 Mathematics, Calculations and Formulas

2 pipes are connected to a tank. One pipe fills the tank in 7 hours. The second pipe empties the tank in 9 hours. If both pipes are open, how long will it take to fill the tank?


In each hour, the filler pipe adds 1/7 of the tank while the drain subtracts 1/9 of the tank.
--> 1/7 - 1/9 per hour
= 2/63 tank per hour
--> 63/2 hours per tank = _______________ hours

Go Back
What We Offer  |  Obtaining a Trade License  |  Test Preparation  |  About Us  |  Contact Us

Copyright © 1998-2019, Contractor School Online®,All Rights Reserved