Oklahoma Cctv (Closed Circuit Television) Practice Test
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Questions and Answers
- 1.
In reference to cabling, UTP means:
- A.
Universal twisted plenum
- B.
Unshielded twisted pair
- C.
Unshielded twisted plenum
- D.
Universal twisted pair
Correct Answer
B. Unshielded twisted pairExplanation
UTP stands for Unshielded Twisted Pair. In cabling, UTP refers to a type of cable that consists of twisted pairs of wires without any shielding. This type of cable is commonly used for Ethernet connections and is known for its affordability and ease of installation. Unlike shielded cables, UTP does not have any additional protection against electromagnetic interference. However, it is suitable for most applications in residential and small business environments where the risk of interference is minimal.Rate this question:
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- 2.
According to NFPA 70, what determines the type of insulation used on conductors in an installation?
- A.
Length of conductor run
- B.
Type of raceway
- C.
Environment
- D.
Current of the circuit
Correct Answer
D. Current of the circuitExplanation
The type of insulation used on conductors in an installation is determined by the current of the circuit. The current flowing through the conductors determines the amount of heat generated, and the insulation is selected based on its ability to withstand and protect against this heat. Different insulation materials have different temperature ratings, so the current of the circuit is an important factor in determining the appropriate insulation type.Rate this question:
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- 3.
What feature helps improve picture quality when aiming cameras towards brightly lit areas?
- A.
Manual iris
- B.
Backlight compensation
- C.
IR illumination
- D.
Electric iris
Correct Answer
B. Backlight compensationExplanation
Backlight compensation is a feature that helps improve picture quality when aiming cameras towards brightly lit areas. It adjusts the exposure settings to balance the brightness levels between the subject and the background, preventing the subject from appearing dark or silhouetted against the bright light. By automatically adjusting the exposure, backlight compensation ensures that both the subject and the background are properly exposed, resulting in a clearer and more balanced image.Rate this question:
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- 4.
The term CIF refers to:
- A.
A common bandwidth requirement
- B.
A common resolution
- C.
The light output of a camera
- D.
The grey scale of an image
Correct Answer
B. A common resolutionExplanation
CIF stands for Common Intermediate Format, which is a video resolution used in videoconferencing and video compression. It has a resolution of 352 x 288 pixels and is commonly used for video streaming and video calling applications. Therefore, the correct answer is "A common resolution."Rate this question:
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- 5.
A characteristic of direct current is that it:
- A.
Cannot be stored
- B.
Changes polarity
- C.
Has a constant polarity
- D.
Is produced by a transformer
Correct Answer
C. Has a constant polarityExplanation
Direct current (DC) is characterized by having a constant polarity, meaning that the flow of electric charge remains in one direction. Unlike alternating current (AC), which changes direction periodically, DC maintains a steady flow of electrons in a single direction. This property of DC makes it suitable for various applications, such as powering electronic devices, batteries, and certain types of motors.Rate this question:
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- 6.
What crime is committed by a technician or salesperson who falsifies a customer’s signature or adds content to a document that has already been signed?
- A.
Fraud
- B.
Larceny
- C.
Indigent interference
- D.
Invasion of privacy
Correct Answer
A. FraudExplanation
The crime committed by a technician or salesperson who falsifies a customer's signature or adds content to a document that has already been signed is fraud. This is because fraud involves the intentional deception or misrepresentation for personal gain, and in this case, the technician or salesperson is deceiving the customer by altering the document without their knowledge or consent.Rate this question:
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- 7.
What does CCD stand for?
- A.
Compressed Capture Device
- B.
Charged Compressed Device
- C.
Capacitive Coupled Device
- D.
Charged Coupled Device
Correct Answer
D. Charged Coupled DeviceExplanation
CCD stands for Charged Coupled Device. This is a type of image sensor technology that is commonly used in digital cameras and video cameras. It works by converting light into electrical charges, which are then transferred and stored in a grid of pixels. This allows the device to capture and process high-quality images and videos.Rate this question:
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- 8.
What is the correct setting on a meter for measuring VAC?
- A.
Ohms
- B.
V
- C.
A_ _ _
- D.
V_ _ _
Correct Answer
B. VExplanation
The correct setting on a meter for measuring VAC is V, which stands for volts. This setting is used to measure the voltage in an alternating current (AC) circuit. By selecting the V setting, the meter is configured to accurately measure the voltage level in the circuit.Rate this question:
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- 9.
A blown fuse in a power supply usually indicates:
- A.
Inadequate voltage
- B.
Too much resistance
- C.
Too much current is being drawn
- D.
The poser supply is too large
Correct Answer
C. Too much current is being drawnExplanation
A blown fuse in a power supply usually indicates that too much current is being drawn. When there is an excessive amount of current flowing through the circuit, it can cause the fuse to overheat and ultimately blow. This is a safety mechanism designed to protect the power supply and other components from damage. It indicates that there is a fault or malfunction in the circuit, causing an abnormal amount of current to be drawn.Rate this question:
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- 10.
GSM and CDMA are two types of:
- A.
Two-way radio mesh networks
- B.
Cellular networks
- C.
Public-switched telephone networks
- D.
Internet networks
Correct Answer
B. Cellular networksExplanation
GSM and CDMA are two types of cellular networks. Cellular networks are a type of wireless communication system that allows mobile devices to connect to the internet and make phone calls. GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access) are two different technologies used in cellular networks to transmit and receive signals. GSM is widely used in Europe, while CDMA is more common in North America. These technologies enable mobile devices to communicate with each other and with the network infrastructure, providing a seamless wireless communication experience.Rate this question:
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- 11.
What is the total current of the circuit shown above? (Table not shown here)
- A.
0.125A
- B.
1.25A
- C.
1.58A
- D.
7.58A
- E.
Need the table to better answer this question
Correct Answer
E. Need the table to better answer this question -
- 12.
What type of network address is needed to remotely view a NVR or DVR on a long term basis?
- A.
Media Access Control
- B.
Dynamic Host Configuration Protocol
- C.
Static
- D.
Dymanic
Correct Answer
B. Dynamic Host Configuration ProtocolExplanation
Dynamic Host Configuration Protocol (DHCP) is the correct answer because it is a network protocol that automatically assigns IP addresses to devices on a network. When remotely viewing a Network Video Recorder (NVR) or Digital Video Recorder (DVR) on a long-term basis, the device's IP address may change over time due to various reasons such as network reconfiguration or device restart. DHCP allows for the automatic allocation of IP addresses, ensuring that the device can always be accessed remotely regardless of any changes in its network address.Rate this question:
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- 13.
What does WDR stand for?
- A.
Wide Dynamic Range
- B.
Wide Distance Reading
- C.
Wide Dynamic Resolution
- D.
Wide Distance Resolution
Correct Answer
A. Wide Dynamic RangeExplanation
WDR stands for Wide Dynamic Range. This term refers to a technology used in imaging devices, such as cameras, to capture a wider range of brightness levels in a scene. It allows for better visibility of details in both bright and dark areas of an image, resulting in a more balanced and clear picture. Wide Distance Reading, Wide Dynamic Resolution, and Wide Distance Resolution are not the correct explanations for the acronym WDR.Rate this question:
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- 14.
What measurement is needed to determine focal length?
- A.
IR cut filter rating
- B.
Operating voltage of the camera
- C.
Electronic iris lens size
- D.
Distance from the camera to the desired view
Correct Answer
D. Distance from the camera to the desired viewExplanation
The focal length of a camera lens is determined by the distance from the camera to the desired view. This measurement is crucial in determining the field of view and how much of the scene will be captured.Rate this question:
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- 15.
If a conflict exists between adopted references, the reference that applies shall be the one:
- A.
That is adopted by the OSFM
- B.
With the more stringent standard
- C.
That is adopted by the local jurisdiction
- D.
Used by the AHJ
Correct Answer
B. With the more stringent standardExplanation
When there is a conflict between adopted references, the reference that applies is the one with the more stringent standard. This means that if there are multiple references being used, the one that has stricter regulations or requirements will take precedence over the others. This ensures that the highest level of safety and compliance is maintained in the given situation.Rate this question:
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- 16.
In video surveillance systems, RS485 is commonly used for:
- A.
Displaying images on a remote monitor
- B.
Controlling PTZ actions
- C.
Connecting video from a network camera
- D.
Transmitting images over distances greater than 3000’
Correct Answer
B. Controlling PTZ actionsExplanation
RS485 is commonly used for controlling PTZ (Pan-Tilt-Zoom) actions in video surveillance systems. This protocol allows for communication between the surveillance camera and the PTZ controller, enabling the user to remotely control the movement and zoom of the camera. RS485 is preferred for this purpose due to its ability to transmit data over long distances, making it suitable for controlling PTZ actions in large surveillance areas.Rate this question:
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- 17.
How many trainees per job site can work under the supervision of a licensed technician?
- A.
Two
- B.
Three
- C.
Four
- D.
Five
Correct Answer
B. ThreeExplanation
According to the given question, the number of trainees per job site that can work under the supervision of a licensed technician is three.Rate this question:
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- 18.
Low voltage wiring installations must:
- A.
Comply with NFPA 70
- B.
Use D-rings to secure cable
- C.
Comply with manufacturer’s recommendations
- D.
Use jacketed, shielded cable
Correct Answer
A. Comply with NFPA 70Explanation
The correct answer is to comply with NFPA 70. NFPA 70, also known as the National Electrical Code (NEC), is a standard that provides guidelines and requirements for electrical installations, including low voltage wiring. It ensures the safety and proper functioning of electrical systems by setting standards for wiring methods, equipment, and installations. Complying with NFPA 70 is essential to ensure that low voltage wiring installations meet the necessary safety and performance standards.Rate this question:
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- 19.
According to NFPA 70, direct buried cables must be:
- A.
Temperature rated
- B.
Arranged so as to prevent damage when the ground settles
- C.
Armored and jacketed
- D.
Protected from animals that burrow underground
Correct Answer
B. Arranged so as to prevent damage when the ground settlesExplanation
Direct buried cables must be arranged so as to prevent damage when the ground settles because settling ground can cause stress and strain on the cables, leading to potential damage or failure. By properly arranging the cables, such as using proper supports and avoiding sharp bends or excessive tension, the risk of damage from ground settling can be minimized. This ensures the longevity and reliability of the cables in underground installations.Rate this question:
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- 20.
A technician experiences sudden weakness on the right side of her body and is having trouble speaking and understanding simple statements. What is the likely cause of her symptoms?
- A.
Dehydration
- B.
Stroke
- C.
Low blood sugar
- D.
High blood sugar
Correct Answer
B. StrokeExplanation
The likely cause of the technician's symptoms is a stroke. A stroke occurs when the blood supply to the brain is disrupted, leading to a lack of oxygen and nutrients. This can result in sudden weakness on one side of the body, difficulty speaking, and trouble understanding simple statements. Dehydration, low blood sugar, and high blood sugar can cause various symptoms, but they are not typically associated with sudden weakness and speech problems like a stroke.Rate this question:
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- 21.
If a system draws 500mA, approximately how long will a 7Ah battery last?
- A.
14 minutes
- B.
140 minutes
- C.
14 hours
- D.
140 hours
Correct Answer
C. 14 hoursExplanation
If a system draws 500mA, it means it consumes 0.5 Amps of current. The capacity of the battery is given as 7Ah, which means it can provide 7 Amps of current for 1 hour. To find out how long the battery will last, we divide the battery capacity (7Ah) by the current drawn by the system (0.5A). This gives us 14 hours, which means the battery will last for approximately 14 hours when the system draws 500mA of current.Rate this question:
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- 22.
Any physical assault, threatening behavior, or verbal abuse that occurs in an employment setting is called:
- A.
Bullying
- B.
Occupational battery
- C.
Workplace violence
- D.
Harassment
Correct Answer
D. HarassmentExplanation
Harassment refers to any physical assault, threatening behavior, or verbal abuse that occurs in an employment setting. It is a form of mistreatment or discrimination that creates a hostile or intimidating work environment. This can include unwanted advances, offensive jokes, or any behavior that targets an individual based on their race, gender, religion, or other protected characteristics. Harassment can have serious negative effects on the victim's mental and physical well-being, and it is important for employers to have policies in place to prevent and address such behavior.Rate this question:
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- 23.
0.0500A equals:
- A.
1.5mA
- B.
5A
- C.
50mA
- D.
500A
Correct Answer
C. 50mAExplanation
0.0500A is equivalent to 50 milliamperes (mA). This measurement represents a current of 0.0500 amperes, where each milliampere is one-thousandth of an ampere. It is commonly used to express small electrical currents in electronic circuits and devices.Rate this question:
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- 24.
When measuring current draw in a circuit, meter leads must be placed:
- A.
In parallel with the circuit with power removed from the circuit
- B.
In series with the circuit with power removed from the circuit
- C.
In series with the circuit with the circuit intact
- D.
In parallel with the circuit with the circuit intact
Correct Answer
C. In series with the circuit with the circuit intactExplanation
When measuring current draw in a circuit, the meter leads must be placed in series with the circuit with the circuit intact. This is because in series connection, the current flowing through the circuit is the same as the current flowing through the meter. Placing the meter leads in parallel with the circuit would create a short circuit, causing a large current to flow and potentially damaging the meter or the circuit. Additionally, removing power from the circuit is not necessary as the meter itself has a very high resistance, allowing it to measure current without interfering with the circuit.Rate this question:
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- 25.
What shortcut calculation is used to approximate the total resistance of a circuit that includes several identical devices wired in parallel?
- A.
Divide the source voltage by the resistance of one of the devices
- B.
Multiply the source voltage by the resistance of one of the devices
- C.
Find the resistance of one of the devices, then divide that by the number of devices in the circuit
- D.
Find the resistance of one of the devices, then multiply that by the number of devices in the circuit
Correct Answer
A. Divide the source voltage by the resistance of one of the devicesExplanation
To approximate the total resistance of a circuit that includes several identical devices wired in parallel, the shortcut calculation used is to divide the source voltage by the resistance of one of the devices. This is because when devices are wired in parallel, the total resistance decreases. By dividing the source voltage by the resistance of one device, we can find the equivalent resistance of the circuit.Rate this question:
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- 26.
When using a portable ladder to access an upper landing surface, how many feet above the landing’s surface must the side rails of the ladder extend?
- A.
Two
- B.
Three
- C.
Five
- D.
Six
Correct Answer
B. ThreeExplanation
When using a portable ladder to access an upper landing surface, the side rails of the ladder must extend at least three feet above the landing's surface. This is important for providing stability and a secure handhold for the person climbing the ladder. Extending the side rails three feet above the landing surface helps to ensure that there is enough support and prevents the ladder from tipping over or becoming unstable during use.Rate this question:
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- 27.
- If a conflict exists between the adopted reference and a chapter in the Alarm and Locksmith Industry Rules, which statement is true?
- A.
The adopted reference shall be followed
- B.
The AHJ shall determine the reference to be followed
- C.
The requirements of the chapter shall be followed
- D.
The reference adopted by the OSFM shall be followed
Correct Answer
C. The requirements of the chapter shall be followedExplanation
If a conflict exists between the adopted reference and a chapter in the Alarm and Locksmith Industry Rules, the true statement is that the requirements of the chapter shall be followed. This means that even if there is a conflict with the adopted reference, the specific requirements outlined in the chapter of the Alarm and Locksmith Industry Rules take precedence.Rate this question:
- 28.
What values are needed to find the maximum available output wattage of a power supply?
- A.
Total resistance of all EOLRs and voltage drop of the NAC circuit
- B.
Current draw of all components tied to the power supply
- C.
Output voltage and output amperage
- D.
Input voltage and output amperage
Correct Answer
C. Output voltage and output amperageExplanation
To find the maximum available output wattage of a power supply, we need to consider the output voltage and output amperage. The wattage can be calculated by multiplying the output voltage and output amperage. Therefore, these two values are necessary to determine the maximum available output wattage.Rate this question:
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- 29.
A technician in allowed to perform work within:
- A.
The alarm industry area(s) for which the company manager is licensed
- B.
Any alarm industry area regulated by the Oklahoma Alarm and Locksmith Industry Act
- C.
The alarm industry area(s) for which he is licensed
- D.
Any alarm industry area as long as he is supervised by a technician who is licensed in that area
Correct Answer
C. The alarm industry area(s) for which he is licensedExplanation
A technician is only allowed to perform work within the alarm industry area(s) for which he is licensed. This means that the technician has the necessary qualifications and certifications to work in specific areas of the alarm industry. They are not permitted to work in areas for which they are not licensed, even if they are supervised by a licensed technician. Licensing ensures that technicians have the appropriate knowledge and skills to carry out their work safely and effectively.Rate this question:
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- 30.
When working on a ladder, the worker should:
- A.
Lean away from the ladder
- B.
Have someone hold the ladder when standing on the top rung
- C.
Keep his weight centered between the side rails
- D.
Tilt the ladder towards the task while standing on it
Correct Answer
C. Keep his weight centered between the side railsExplanation
When working on a ladder, it is important for the worker to keep his weight centered between the side rails. This ensures stability and reduces the risk of the ladder tipping over. By distributing the weight evenly, the worker can maintain balance and minimize the chances of accidents or falls. This practice is crucial for ladder safety and should be followed to prevent injuries.Rate this question:
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- 31.
How many points of contact with a ladder should a worker maintain at all times?
- A.
One
- B.
Two
- C.
Three
- D.
Four
Correct Answer
C. ThreeExplanation
A worker should maintain three points of contact with a ladder at all times. This means that they should have both feet and one hand or both hands and one foot in contact with the ladder. This ensures stability and reduces the risk of falling or losing balance while climbing or working on the ladder. By having three points of contact, the worker can securely grip the ladder and maintain a stable position, minimizing the chances of accidents or injuries.Rate this question:
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- 32.
The Oklahoma Alarm and Locksmith Industry Act applies to:
- A.
Work performed by individuals licensed pursuant to the Electrical License Act
- B.
Persons who sell, install and service alarm systems
- C.
State employees engaged in the performance of official duties
- D.
Individuals who own and install alarm devices on their own property
Correct Answer
B. Persons who sell, install and service alarm systemsExplanation
The Oklahoma Alarm and Locksmith Industry Act applies to persons who sell, install, and service alarm systems. This means that individuals or businesses involved in these activities are required to comply with the regulations and licensing requirements outlined in the Act. The Act does not apply to individuals licensed under the Electrical License Act, state employees, or individuals who own and install alarm devices on their own property.Rate this question:
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- 33.
A technician is weak; having chills and cannot seem to get enough to drink. What is the likely cause of the technician’s symptoms?
- A.
Stroke
- B.
Low blood sugar
- C.
Dehydration
- D.
High blood sugar
Correct Answer
D. High blood sugarExplanation
The likely cause of the technician's symptoms is high blood sugar. High blood sugar, also known as hyperglycemia, can lead to symptoms such as weakness, chills, and excessive thirst. It occurs when the body does not produce enough insulin or is unable to effectively use the insulin it produces. This can be a sign of diabetes or other underlying health conditions.Rate this question:
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- 34.
What is the standard impedance for analog CCTV systems?
- A.
500 mA
- B.
300 ohms
- C.
3.3mA
- D.
75 ohms
Correct Answer
D. 75 ohmsExplanation
The standard impedance for analog CCTV systems is 75 ohms. Impedance is a measure of the opposition to the flow of electrical current in a circuit. In analog CCTV systems, the video signals are transmitted through coaxial cables, and these cables are designed to have an impedance of 75 ohms. This impedance matching ensures that the video signals are properly transmitted without any loss or distortion. Therefore, 75 ohms is the correct answer for the standard impedance of analog CCTV systems.Rate this question:
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- 35.
Cables that are not plenum rated can be used in a plenum when they are:
- A.
Rated for nonpower-limited circuits
- B.
Used in areas with no air flow
- C.
Marked "special use"
- D.
Installed in a plenum rated raceway
Correct Answer
D. Installed in a plenum rated racewayExplanation
Cables that are not plenum rated can still be used in a plenum if they are installed in a plenum rated raceway. This means that even though the cables themselves may not be suitable for use in areas with air flow, they can still be used safely in a plenum if they are enclosed within a raceway that meets the necessary plenum rating requirements. This ensures that the cables are protected and do not pose a fire hazard in the plenum area.Rate this question:
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- 36.
What safety features must be on power tools used in the workplace?
- A.
Variable speed controls and rechargeable batteries
- B.
Properly fitting guards and appropriate safety switches
- C.
Constant pressure switches and reinforced plugs
- D.
Anti-slip handholds and cord storage compartments
Correct Answer
B. Properly fitting guards and appropriate safety switchesExplanation
Properly fitting guards and appropriate safety switches are necessary safety features for power tools used in the workplace. Guards help protect the user from coming into contact with the moving parts of the tool, reducing the risk of injury. Safety switches are designed to automatically shut off the tool when a dangerous situation occurs, such as when the tool is dropped or when the user loses control. These features ensure that power tools are used safely and minimize the potential for accidents or injuries in the workplace.Rate this question:
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- 37.
All monitoring and/or lease contracts shall include the initial term of the agreement, the renewal term of the agreement and the:
- A.
Terms for notification or cancellation
- B.
Company managers name
- C.
Telephone number to call to renew or cancel the contract
- D.
Names of customers who can provide testimonials
Correct Answer
A. Terms for notification or cancellationExplanation
All monitoring and/or lease contracts shall include the initial term of the agreement and the renewal term of the agreement, as well as the terms for notification or cancellation. This ensures that both parties are aware of the specific conditions under which the contract can be terminated or renewed. Including these terms in the contract helps to clarify the rights and responsibilities of each party and provides a clear framework for any potential changes or terminations in the future.Rate this question:
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- 38.
What type of cable uses a dielectric?
- A.
Twisted pair
- B.
Unshielded twisted pair
- C.
Coaxial
- D.
THHN
Correct Answer
C. CoaxialExplanation
Coaxial cable uses a dielectric. The dielectric is a non-conductive material that separates the inner conductor from the outer conductor in a coaxial cable. It helps to maintain the integrity of the signal by preventing interference and signal loss. The dielectric material is typically made of materials like foam, plastic, or air, which have low electrical conductivity. This allows the coaxial cable to transmit signals efficiently and with minimal loss.Rate this question:
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- 39.
The smallest element of data in a video image is known as a:
- A.
Bit
- B.
Point
- C.
Byte
- D.
Pixel
Correct Answer
D. PixelExplanation
A video image is made up of tiny individual dots called pixels. Each pixel represents a single point of color in the image. Therefore, the smallest element of data in a video image is known as a pixel.Rate this question:
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- 40.
Adjusting the distance between the lens and the imaging device is called:
- A.
Focusing
- B.
Pixelation
- C.
Compensation
- D.
Cropping
Correct Answer
A. FocusingExplanation
The term "focusing" refers to the process of adjusting the distance between the lens and the imaging device. This adjustment is necessary to achieve clear and sharp images. By changing the distance, the lens can bring the subject into focus, ensuring that it appears sharp and well-defined in the final image.Rate this question:
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- 41.
What is the maximum amount of administrative fines that can be levied against any person for violations of the Oklahoma Alarm and Locksmith Industry Act?
- A.
$200
- B.
$500
- C.
$1,000
- D.
$7,500
Correct Answer
C. $1,000Explanation
The maximum amount of administrative fines that can be levied against any person for violations of the Oklahoma Alarm and Locksmith Industry Act is $1,000.Rate this question:
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- 42.
What is the command line to verify IP connectivity to a device?
- A.
IPidentity
- B.
192.168.1.1
- C.
Ping
- D.
IPlocate
Correct Answer
C. PingExplanation
The correct answer is "ping". The ping command is used to verify IP connectivity to a device. It sends a small packet of data to the specified IP address and waits for a response. If a response is received, it indicates that there is connectivity between the source and destination devices. This command is commonly used to troubleshoot network connectivity issues and to measure the round-trip time for data to travel to and from a device.Rate this question:
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- 43.
NFPA 70 is also referred to as the:
- A.
Hazardous Material Code
- B.
National Electric Code
- C.
Life Safety Code
- D.
National Fire Code
Correct Answer
B. National Electric CodeExplanation
The correct answer is National Electric Code. NFPA 70 is commonly known as the National Electric Code, which is a set of standards and regulations for electrical installations in the United States. It provides guidelines for the safe installation and use of electrical systems to protect people and property from electrical hazards. The National Electric Code is widely adopted and enforced by local and state authorities to ensure electrical safety in buildings and structures.Rate this question:
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- 44.
What measurement on a meter is used to test conductivity of a circuit?
- A.
Voltage
- B.
Current
- C.
Wattage
- D.
Continuity
Correct Answer
D. ContinuityExplanation
Continuity is the measurement on a meter that is used to test the conductivity of a circuit. It determines if there is a complete path for the electric current to flow through the circuit. By testing continuity, it can be determined if there are any breaks or interruptions in the circuit that may cause a lack of conductivity. Voltage, current, and wattage are other measurements used in circuits, but they do not specifically test for conductivity like continuity does.Rate this question:
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- 45.
A coworker is pale, confused, sweating and says that he feels “shaky”. What is the likely cause of his symptoms?
- A.
High blood sugar
- B.
Low blood sugar
- C.
Stroke
- D.
Dehydration
Correct Answer
B. Low blood sugarExplanation
The likely cause of the coworker's symptoms is low blood sugar. These symptoms are commonly associated with hypoglycemia, which occurs when the blood sugar levels drop too low. Pale skin, confusion, sweating, and feeling shaky are all classic signs of low blood sugar. It is important to address this condition promptly to prevent further complications.Rate this question:
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- 46.
Electrical protective devices include fuses, circuit breakers and:
- A.
Ground-fault circuit interrupters
- B.
Insulators
- C.
Shunts
- D.
Grounding rods
Correct Answer
A. Ground-fault circuit interruptersExplanation
Ground-fault circuit interrupters (GFCIs) are electrical protective devices that are designed to quickly shut off power in the event of a ground fault. They are used to protect against electrical shocks and prevent electrical fires. GFCIs monitor the flow of electricity and can detect imbalances in the electrical current. If a ground fault is detected, the GFCI will quickly interrupt the circuit, cutting off the power supply. This helps to prevent injury and damage to electrical equipment.Rate this question:
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- 47.
A CCTV system layout shows a camera mounted 12’ AFF. What does AFF mean?
- A.
Area flowing freely
- B.
Above finished floor
- C.
Above final flooring
- D.
Always facing forward
Correct Answer
B. Above finished floorExplanation
AFF stands for "Above finished floor". In the context of a CCTV system layout, it indicates the height at which the camera is mounted in relation to the finished floor surface. This information is important for proper installation and positioning of the camera to ensure optimal surveillance coverage.Rate this question:
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- 48.
When connecting a DVR to a network, a MAC address refers to:
- A.
Media Address Camera
- B.
Motion Active Changes
- C.
Motion Activated Camera
- D.
Media Access Control
Correct Answer
D. Media Access ControlExplanation
When connecting a DVR to a network, a MAC address refers to Media Access Control. A MAC address is a unique identifier assigned to a network interface card (NIC) by the manufacturer. It is used to identify devices on a network and ensure that data is transmitted to the correct destination. In the context of a DVR, the MAC address is used to establish a connection with the network and enable communication between the DVR and other devices on the network.Rate this question:
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- 49.
What type of building material most interferes with wireless communications?
- A.
Sheetrock/gypsum board
- B.
Plastic
- C.
Metal
- D.
Concrete
Correct Answer
C. MetalExplanation
Metal is the building material that most interferes with wireless communications. This is because metal is a highly conductive material that can block or reflect wireless signals, causing interference and reducing the strength and quality of the wireless communication. Metal objects such as walls, roofs, or furniture can act as barriers for wireless signals, making it difficult for them to pass through and reach their intended destination.Rate this question:
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- 50.
What type of connector is used to connect cable to an IP camera?
- A.
F
- B.
RJ45 male
- C.
RJ45 female
- D.
BNC
Correct Answer
B. RJ45 maleExplanation
The type of connector used to connect a cable to an IP camera is typically an RJ45 male connector. This connector is commonly used for Ethernet connections, providing a reliable and secure connection between the IP camera and the network infrastructure.Rate this question:
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Mar 15, 2024Quiz Edited by
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Mar 01, 2015Quiz Created by
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