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

Delaware-Low Voltage 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 Conductors, Telephone Lines and Jacks

A Cat 6 cable uses what type of jack?

2 Computers, Satellite Dish, Transmission Systems and Communication Circuits All TV satellites rotate in the _____ orbit.
3 Circuits The flow of electrons and tiny atomic particles is referred to as ___________________.
4 Conduits, Voltmeters, Ammeter and Ohmmeter Plenum rated cable for CATV is marked with?
5 Wiring UBC requirements for residential buildings limit openings betweem balustrades to less than ________ inches.
6 Cable Installation ______________ connectors are a variant on BNC that carry a signal and guard as well as ground conductor. These are used in sensitive electronic measurement systems.
7 Circuits, Conduit, Conductors and Installation of Low Voltage Systems Having an 18 gauge, Class 1 circuit conductor, the over current protection should not exceed _______ amps.
8 Cables, Phone Installations and Systems In beginning a communications project, the number one priority is to ensure that all the ______________ are done correctly.
9 Conductors, Cables and Grounding The reference level for voltage levels within a system is usually referred to as ________________.
10 Topology, Cable Specification and Telecommunications _________________ is the mathematical study of shapes and spaces. It is a major area of mathematics concerned with the most basic properties of space, such as connectedness, continuity and boundary. It is the study of properties that are preserved under continuous deformations including stretching and bending, but not tearing or gluing.
11 PA Systems and Installation _____- gauge to 22- gauge is usually more than adequate to handle the necessary amount of current for a given application.
12 Telecommunications Cross Talk A delay line based on the time of propagation of electromagnetic waves is considered to be an _________________________.
13 Home Theater and Installation The logical system hub for a practical home theater is the audio/video receiver or the __________ receiver.
14 Antenna's A _____________ is a separation of positive and negative charges.
15 Troubleshooting

How is power limited fire alarm cable marked?

16 Wiring and Raceways Regarding telephone wiring components, the conductors in telephone wires should be solid copper with a 22 AWG minimum and at least ______ insulated conductor wires. These wires should be colored green, red, black and yellow or standard coding.
17 Wiring Requirements and Wire Characteristics The acronym OEM is in reference to _____________________.
18 Security Systems and Alarms ___________________ often have additional contacts to control other circuits or devices.
19 Fiber Optics _________________ is the phenomenon in which the phase velocity of a wave depends on its frequency, or alternatively when the group velocity depends on the frequency.
20 OSHA, Dig Alert, Safety, Asbestos, Code of Federal Regulations, Title 29, Part 1926 and Fire Extinguishers

WA Utility Notifications Center 811 Dig Alert, must be notified of site excavation at least ___________ days but not more than _______.

21 License Information If a qualifier leaves a company, how many days can the remaining personnel continue the work in progress?
22 Basic Bid Preparation and Estimating How is gross profit figured?
23 Basic Blueprint Reading and Plans ____________ lines indicate an entire length in a small space.
24 Mathematics, Calculations and Formulas

When the 5 k potentiometer in this circuit is set to its 0%, 25%, 50%, 75%, and 100% positions, the following output voltages are obtained (measured with respect to ground, of course): 


At 0% setting, Vout = 0 V
At 25% setting, Vout = 2.5 V
At 50% setting, Vout = 5 V
At 75% setting, Vout = 7.5 V
At 100% setting, Vout = 10 V

Calculate what the output voltages will be if a 1 k? load resistor is connected between the "Vout" terminal and ground: 


At 0% setting, Vout =
At 25% setting, Vout =
At 50% setting, Vout =
At 75% setting, Vout =
At 100% setting, Vout =

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

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