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North Carolina-Low Voltage Electrical Special Restricted Contracting 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
14 Antenna's A __________ is a separation of positive and negative charges.
22 Basic Bid Preparation and Estimating The three basic steps to estimating a construction project are, estimate of how much material that you will be using, labor and pricing.
23 Basic Blueprint Reading and Plans How a building construction project will work is conveyed in a basic drawing called what?
6 Cable Installation The __________ connector is a type of RF connector used for terminating coaxial cable. The connector looks almost identical to a typical BNC connector, but is not designed to mate with BNC jacks.
8 Cables, Phone Installations and Systems In beginning a communications project, the number one priority is to ensure that all the __________ are done correctly.
3 Circuits The flow of electrons and tiny atomic particles is referred to as __________.
7 Circuits, Conduit, Conductors and Installation of Low Voltage Systems Having 100 turns on the primary side of the transformer, plugged into 120 volts, what is the secondary voltage if it has 10 turns?
2 Computers, Satellite Dish, Transmission Systems and Communication Circuits All TV satellites rotate in the __________ orbit.
9 Conductors, Cables and Grounding The reference level for voltage levels within a system is usually referred to as __________.
1 Conductors, Telephone Lines and Jacks A Cat 6 cable uses what type of jack?
4 Conduits, Voltmeters, Ammeter and Ohmmeter Plenum rated cable for CATV is marked with?
19 Fiber Optics A __________ is a type of photodetector capable of converting light into either current or voltage, depending upon the mode of operation.
13 Home Theater and Installation __________ is a video display interface developed by the Digital Display Working Group (DDWG).
21 License Information If a qualifier leaves a company, how many days can the remaining personnel continue the work in progress?
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 =
20 OSHA, Safety, Asbestos, Code of Federal Regulations, Title 29, Part 1926 and Fire Extinguishers OSHA Standards - Demarcation is the regulated area that shall __________ demarcated in any manner that minimizes the number of persons within the area and protects persons outside the area from exposure to airborne asbestos. Where critical barriers or negative pressure enclosures are used, they may demarcate the regulated area. Signs shall be provided and displayed pursuant to the requirements of paragraph (k)(7).
11 PA Systems and Installation A __________ is an electronic device that increases the power of a signal.
18 Security Systems and Alarms On buildings, open conductors should be separated at least __________ inches from electric or power conductors not in conduit or cable.
12 Telecommunications Cross Talk The acronym EMR is in reference to __________.
10 Topology, Cable Specification and Telecommunications A __________ is a network that covers a broad area (i.e., any telecommunications network that links across metropolitan, regional, or national boundaries) using private or public network transports.
15 Troubleshooting How is power limited fire alarm cable marked?
99 USA Dig Alert The ##DIG_ALERT_COMPANY## markings are valid __________.
5 Wiring What are closed raceways referred to?
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 __________.


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