Security Alarm Installer Quiz

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1. According to workers compensation, anyone can work on an energized circuit

Explanation

According to workers compensation regulations, working on an energized circuit is highly dangerous and should only be done by qualified and trained individuals. Therefore, the statement that anyone can work on an energized circuit is false.

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About This Quiz
Security Alarm Installer Quiz - Quiz

Here is a Security alarm installer quiz for you. This quiz has multiple questions that revolve around the topic of security alarm installer. This quiz is going to... see moregive you a glimpse of your understanding as well as you will return with extra knowledge than you came with. Read all of these questions carefully, and select the answer, which best suits the question. Best of luck with the test, and enjoy it!
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2. Is it permissible to run security wire through the same hole as 120V wiring?

Explanation

Running security wire through the same hole as 120V wiring is not permissible. Mixing low voltage security wire with high voltage wiring can pose significant safety risks. The high voltage can cause interference or damage to the security wire, compromising its functionality. Additionally, it can create a fire hazard or risk of electric shock. It is essential to keep low voltage wiring separate from high voltage wiring to ensure the safety and proper functioning of both systems.

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3. If working on energized electrical circuits you must

Explanation

To work on energized electrical circuits, it is crucial to be qualified and authorized. This means having the necessary knowledge, skills, and training to safely handle electrical equipment and circuits. Working on energized circuits without proper authorization and qualification can be extremely dangerous and may lead to electrical shock, burns, or even death. It is important to follow safety protocols and only allow qualified and authorized individuals to work on energized electrical circuits to minimize the risk of accidents and ensure the safety of everyone involved.

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4. A smoke detector is considered a

Explanation

A smoke detector is considered a life safety device because it is designed to detect the presence of smoke in order to provide early warning of a potential fire. Its purpose is to alert individuals in the vicinity, allowing them to evacuate the area and seek safety before the fire spreads. Smoke detectors are crucial in preventing injuries and fatalities caused by fires, making them an essential component of any building's safety system.

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5. A "Pet Alley" is a section of the protection pattern, which has been masked to allow the movement of a small animal

Explanation

A "Pet Alley" is a designated area within a protection pattern that is specifically designed to accommodate the movement of small animals. It is a section that has been masked or cleared to ensure the safety and freedom of movement for pets within the protected space. This allows pets to navigate through the area without triggering any alarms or causing any disruptions to the security system. Therefore, the statement that a "Pet Alley" is a section of the protection pattern that allows the movement of a small animal is true.

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6. During a pre-wire, an alarm technician is allowed to drill through engineered or structured beams

Explanation

During a pre-wire, an alarm technician is not allowed to drill through engineered or structured beams. This is because these beams are specifically designed to provide structural support and drilling through them can weaken the overall integrity of the building. The technician must find alternative ways to route the wiring without compromising the structural integrity of the beams.

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7. In AC circuits, the unit Hz refers to

Explanation

The unit Hz refers to the frequency of a signal in AC circuits. Hz stands for Hertz, which is the unit of measurement for frequency. Frequency represents the number of cycles or oscillations that occur in one second. In AC circuits, the frequency of the signal determines the rate at which the current alternates direction. It is an important parameter in AC circuits as it affects various aspects such as the behavior of capacitors and inductors, the efficiency of power transmission, and the performance of electrical devices.

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8. A diode is a device which

Explanation

A diode is a device that allows current to flow in one direction. This is because it is designed with a p-n junction, which acts as a one-way gate for electrical current. When the diode is forward-biased, meaning the positive voltage is applied to the p-side and the negative voltage to the n-side, it allows current to flow freely. However, when the diode is reverse-biased, it acts as an insulator and prevents current flow. Therefore, the correct answer is that a diode allows current to flow in one direction.

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9. Electrostatic discharge can damage most modern electronic circuits

Explanation

Electrostatic discharge (ESD) refers to the sudden flow of electricity between two objects with different electric potentials. This discharge can cause damage to electronic circuits by exceeding their voltage tolerance levels. Most modern electronic circuits are designed to be sensitive and can be easily damaged by ESD. Therefore, it is true that electrostatic discharge can damage most modern electronic circuits.

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10. True or false, on a two storey wood frame building it is required to cap or plug unused conduit that would allow the passage of fire or smoke between the first and second floor?

Explanation

On a two storey wood frame building, it is necessary to cap or plug unused conduit that would allow the passage of fire or smoke between the first and second floor. This is important for fire safety measures as it helps prevent the spread of fire and smoke between the floors, reducing the potential damage and danger to occupants. Capping or plugging the unused conduit ensures that there are no open pathways for fire or smoke to travel through, maintaining the integrity of the building's fire protection system.

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11. What is a fish tape used for?

Explanation

A fish tape is a tool used for wire retrieval. It is a long, flexible, and narrow strip of steel or fiberglass that is coiled up and can be extended to reach into tight spaces such as walls, ceilings, or conduits. The tape is inserted into the space and then used to guide and pull electrical wires or cables through the area, making it easier to install or repair electrical systems.

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12. Surge protectors should be  considered only after a system has been damaged once by a power surge, since it will likely happen again?

Explanation

The statement suggests that surge protectors should only be considered after a system has been damaged once by a power surge, implying that it is necessary to experience damage before taking preventive measures. However, this is incorrect. Surge protectors are designed to prevent damage from power surges, and it is recommended to use them as a proactive measure to protect electronic devices and systems from potential damage caused by power surges. Therefore, the correct answer is False.

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13. For an intruder to be sensed by a PIR, it is best if he

Explanation

The correct answer is "walks across the detector's pattern." PIR (Passive Infrared) sensors detect changes in infrared radiation, such as body heat, within their detection pattern. When an intruder walks across the detector's pattern, their body heat will cause a change in the infrared radiation, triggering the sensor to sense their presence. This is the most effective way for an intruder to be detected by a PIR sensor.

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14. The input coil of a transformer is called the

Explanation

The input coil of a transformer is called the primary coil because it is the coil that receives the input voltage. It is connected to the power source and is responsible for transferring the electrical energy to the secondary coil. The primary coil typically has a higher number of turns than the secondary coil, which allows for voltage transformation in the transformer.

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15. Which of the following is an environmental sensor?

Explanation

A CO detector is an environmental sensor because it is designed to detect the presence of carbon monoxide gas in the environment. Carbon monoxide is a toxic gas that is colorless and odorless, making it difficult to detect without a specialized sensor. CO detectors are typically used in homes and buildings to provide an early warning of a potential carbon monoxide leak, allowing people to evacuate and seek help before being exposed to dangerous levels of the gas.

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16. Where should an alarm installer keep her licence

Explanation

An alarm installer should keep her license on her person at all times while working. Keeping it in the truck glove box, her briefcase, or a safety deposit box would not be appropriate as it may not be easily accessible when needed for verification or inspection.

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17. The names of the contact on a SPDT relay are

Explanation

The correct answer is "common, NC, NO". In a SPDT (Single Pole Double Throw) relay, there are three terminals: common (C), normally closed (NC), and normally open (NO). The common terminal is the central terminal that is connected to either the NC or NO terminal depending on the relay's state. The normally closed terminal is connected to the common terminal when the relay is not energized, and it opens when the relay is energized. On the other hand, the normally open terminal is not connected to the common terminal when the relay is not energized, and it closes when the relay is energized.

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18. The primary goal of a security system is

Explanation

The primary goal of a security system is to reduce the customer's property loss. This means that the system is designed to prevent or minimize any damage or theft that may occur on the customer's property. While making a loud noise, calling the neighbors and police, and scaring the burglar may be secondary effects of a security system, the main purpose is to protect the customer's belongings and assets.

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19. A RJ-45 jack can be used in place of a RJ-31

Explanation

RJ-45 and RJ-31 are two different types of jacks used in telecommunications. RJ-45 jacks are commonly used for Ethernet connections, while RJ-31 jacks are used for connecting alarm systems to telephone lines. These two jacks have different pin configurations and functions, so they are not interchangeable. Therefore, a RJ-45 jack cannot be used in place of a RJ-31 jack.

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20. When running cable in a drop ceiling, if you wish to cross a firewall

Explanation

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21. In DC circuits, capacitors are used mainly to

Explanation

Capacitors are commonly used in DC circuits to filter fluctuation voltage levels. This is because capacitors have the ability to store and release electrical energy quickly, which helps to smooth out any sudden changes or fluctuations in voltage. By placing a capacitor in parallel with a load, it can absorb any spikes or dips in voltage, providing a more stable and consistent power supply. This is particularly useful in sensitive electronic devices that require a steady voltage to function properly.

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22. In an electric door strike, the term "fail secure" means

Explanation

In an electric door strike, the term "fail secure" means that the door locks when power is removed. This means that even in the event of a power failure or interruption, the door will remain locked and secure. This is important for security purposes, as it ensures that unauthorized individuals cannot gain access to the door when there is no power.

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23. Free egress from a building is required

Explanation

The phrase "free egress from a building" refers to the ability to exit a building without any obstruction or hindrance. This requirement is necessary "at all times" to ensure the safety of occupants in case of emergencies such as fires or other hazards. It is crucial to have unrestricted access to exits at all times, regardless of whether it is deemed necessary by the fire marshal or if the access system is disabled.

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24. The amount of electricity going past a given point in a circuit is called.

Explanation

The amount of electricity flowing through a given point in a circuit is referred to as current. Current is measured in amperes and represents the rate of flow of electric charge. It is a fundamental concept in electrical engineering and is essential for understanding the behavior of circuits and devices. Voltage, resistance, and inductance are related concepts but represent different aspects of electrical circuits.

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25. What is the rule regarding cable penetrating the vapor barrier of a wall?

Explanation

The rule regarding cable penetrating the vapor barrier of a wall is that the hole around the cable must be sealed. This is important to prevent the passage of moisture and air through the hole, which could lead to damage or inefficiency in the wall's insulation. Properly sealing the hole helps maintain the integrity of the vapor barrier and ensures that the wall functions as intended.

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26. The acknowledge tone the given by the alarm receiver to a digital dialer telling it to begin transmitting is called the

Explanation

The correct answer is "handshake". In digital communication, a handshake is the process of initiating a connection between two devices. It involves a series of signals or tones exchanged between the sender and receiver to establish a connection and ensure that both devices are ready to transmit and receive data. The handshake tone mentioned in the question refers to the acknowledgment tone given by the alarm receiver to a digital dialer, indicating that it is ready to begin transmitting data.

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27. Four 100 ohm resistors connected in parallel have the equivalent value of

Explanation

When resistors are connected in parallel, the equivalent resistance is calculated using the formula 1/Req = 1/R1 + 1/R2 + 1/R3 + 1/R4. In this case, since all four resistors have the same value of 100 ohms, the equation becomes 1/Req = 1/100 + 1/100 + 1/100 + 1/100. Simplifying this equation gives 1/Req = 4/100. Taking the reciprocal of both sides gives Req = 100/4, which simplifies to 25.0 ohm. Therefore, the equivalent value of four 100 ohm resistors connected in parallel is 25.0 ohm.

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28. The device which operates on the principle of mutual inductance of parallel coils is

Explanation

A transformer operates on the principle of mutual inductance of parallel coils. It consists of two or more coils wound around a common magnetic core. When an alternating current flows through the primary coil, it creates a changing magnetic field which induces a voltage in the secondary coil. This allows for the transfer of electrical energy from one circuit to another without direct electrical connection. Transformers are commonly used in power transmission and distribution systems to increase or decrease voltage levels.

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29. When correctly measuring a standard alarm power supply voltage your digital VOM reads +6.80 VDC. No devices are connected to the terminals. This means that

Explanation

When the digital VOM reads a voltage of +6.80 VDC, it indicates that the voltage is too low for the system devices to function correctly. This means that the power supply is not providing enough voltage for the devices to operate properly.

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30. A step down transformer

Explanation

A step down transformer is designed to lower the voltage of an alternating current (AC) power source. It has more turns on its secondary coil than on its primary coil, which results in a reduced voltage output. This allows the transformer to provide a lower AC voltage to devices or systems that require it. Therefore, the correct answer is "provides a reduced AC voltage."

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31. A non-metallic material that allows the flow of electrons is a

Explanation

A semi-conductor is a non-metallic material that allows the flow of electrons. Unlike conductors, which have high conductivity, and insulators, which have low conductivity, semi-conductors have moderate conductivity. This means that they can conduct electricity under certain conditions, such as when exposed to heat or light. Semi-conductors are widely used in electronic devices, such as transistors and diodes, due to their ability to control the flow of electrons and their versatility in conducting or blocking electrical current.

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32. If an intruder has the same temperture as the surrounding air, will a PIR motion detector detect his motion?

Explanation

The correct answer is yes because temperature is not the only consideration. PIR motion detectors work by detecting changes in infrared radiation, which is emitted by all objects with a temperature above absolute zero. While temperature is a factor, the detector also considers the movement and changes in the infrared radiation pattern. Therefore, even if the intruder has the same temperature as the surrounding air, the motion detector can still detect their motion based on the changes in the infrared radiation pattern caused by their movement.

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33. Which of the following groups of ambient conditions are those to be cautious of when installing PIR motion detectors?

Explanation

PIR motion detectors are sensitive to changes in temperature, and objects with rapidly changing temperatures such as fax machines and heaters can cause false alarms. These objects emit heat, which can trigger the motion detector and result in unnecessary alerts. Therefore, it is important to be cautious of these ambient conditions when installing PIR motion detectors to ensure accurate and reliable detection.

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34. The frequency of ultrasonic waves goes unchanged when reflecting off

Explanation

Ultrasonic waves are high-frequency sound waves that are above the range of human hearing. When these waves reflect off a stationary object, the frequency of the waves remains unchanged. This is because the frequency of a wave is determined by the source and does not change when it reflects off an object. Therefore, the correct answer is any stationary object.

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35. Electrical current is measured using

Explanation

An ammeter is used to measure electrical current. It is specifically designed to measure the flow of electric current in a circuit. Unlike an ohmmeter, which measures resistance, a voltmeter, which measures voltage, or an oscilloscope, which measures the waveform of an electrical signal, an ammeter is the appropriate tool for directly measuring the amount of current flowing through a circuit.

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36. Infrared radiation is a form of

Explanation

Infrared radiation is a form of heat energy. It is a type of electromagnetic radiation that is not visible to the human eye but can be felt as heat. It is commonly emitted by objects with a temperature higher than absolute zero. Infrared radiation is used in various applications such as heating, cooking, and thermal imaging.

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37. A correctly installed ADSL service cannot affect the function of a digital dialer

Explanation

A correctly installed ADSL service operates on a different frequency range than a digital dialer, allowing them to function independently without interfering with each other. This means that the ADSL service does not impact the function of the digital dialer, making the statement true.

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38. According to the CEC, "concealed" cables are accessible for service

Explanation

According to the CEC, "concealed" cables are not accessible for service. This means that these cables are hidden or covered and cannot be easily reached or serviced. Therefore, the correct answer is False, indicating that concealed cables are not accessible for service.

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39. The amount of voltage drop across a short circuit:

Explanation

The correct answer is "is always 0V". In a short circuit, the resistance is extremely low or zero, causing a large current to flow. According to Ohm's Law (V = IR), if the resistance is zero, the voltage drop across it will also be zero. Therefore, in a short circuit, the voltage drop is always 0V.

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40. When measuring the continuity of an alarm circuit, the circuit should be

Explanation

When measuring the continuity of an alarm circuit, it is important to disconnect it from the alarm panel. This is because measuring continuity requires breaking the circuit to check if there is a continuous path for the current to flow. If the circuit is still connected to the alarm panel, it may interfere with the measurement and give inaccurate results. Therefore, disconnecting the circuit from the alarm panel ensures that the measurement is accurate and reliable.

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41. A motion detector in an alarm system detects motion

Explanation

The correct answer is "at all times" because a motion detector in an alarm system is designed to constantly monitor and detect any movement within its range, regardless of whether the alarm panel is armed or not. It is a crucial component of the system that is always active to ensure the security of the premises.

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42. Dual-technology detectors have the advantage of

Explanation

Dual-technology detectors have the advantage of better stability in areas of ambient disturbances. This means that they are less likely to be affected by external factors such as changes in temperature, humidity, or electromagnetic interference. This stability allows the detectors to provide more accurate and reliable detection, ensuring that they are not triggered falsely by environmental conditions. As a result, dual-technology detectors are a preferred choice in areas where there may be a higher likelihood of ambient disturbances, such as busy commercial spaces or areas with high foot traffic.

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43. Which dialer format will transmit information the most quickly?

Explanation

DTMF (Dual-Tone Multi-Frequency) is a dialer format that transmits information quickly. It uses a combination of two frequencies to represent each digit or symbol, allowing for efficient transmission of data. JSKY and FSK are not commonly used dialer formats and may not have the same level of speed and efficiency as DTMF. Therefore, DTMF is the correct answer for the format that transmits information the most quickly.

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44. A ULC fire alarm certificate may issued by

Explanation

A ULC fire alarm certificate can only be issued by a ULC listed company. This means that the company has been certified by the Underwriters Laboratories of Canada (ULC) to meet the required standards for fire alarm installation. The authority having jurisdiction may require that the certificate is issued by a ULC listed company to ensure that the fire alarm system meets the necessary safety standards. An insurance company may not have the expertise or authority to issue such a certificate. Companies following ULC installation standards may be considered, but the requirement is specifically for a ULC listed company.

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45. A standard surface mount magnetic reed contact mounted on a commercial aluminum front entry door frame can operate a 14V-225mA doorbell.

Explanation



A standard surface mount magnetic reed contact is typically used for sensing purposes, such as detecting when a door or window is opened or closed. It is not designed to directly operate a doorbell, which typically requires a power source and a chime or buzzer mechanism to produce sound. Therefore, the statement is false.
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46. A 4.5 amp-hour battery will provide 300 mA of current for

Explanation

A 4.5 amp-hour battery can provide 300 mA of current for 15 hours. This is because the capacity of the battery is given in amp-hours, which means it can deliver a certain amount of current (in this case, 4.5 amps) for a specific duration (15 hours). Since the load is not specified in the question, we can assume that the battery will provide 300 mA of current for the full 15 hours.

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47. Which of the following is true?

Explanation

A magnetic field exists around any current-carrying conductor. When an electric current flows through a conductor, it creates a magnetic field around it. This is a fundamental principle of electromagnetism known as Ampere's law. The strength and direction of the magnetic field depend on the magnitude and direction of the current. This principle is widely used in various applications, such as electric motors, transformers, and magnetic resonance imaging (MRI) machines.

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48. A PIR motion sensor creates zones of detection to cover a large area through the use of

Explanation

Mirrors or lenses are used in a PIR motion sensor to create zones of detection and cover a large area. These components help to focus and direct the infrared radiation emitted by a moving object towards the dual-element sensors of the sensor. By using mirrors or lenses, the sensor can effectively detect motion within its range and trigger the appropriate response. Walk-test LED's and pulse-count circuitry are not directly related to the creation of detection zones, while dual-element sensors are mentioned as the components that work in conjunction with mirrors or lenses.

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49. Photo-electric beams transmit

Explanation

Pulsed infrared energy is the correct answer because photo-electric beams use infrared light to detect the interruption of the beam. These beams work by emitting short bursts of infrared energy and then measuring the amount of energy that is reflected back. When an object interrupts the beam, the amount of reflected energy changes, indicating the presence of an object. Therefore, the photo-electric beams transmit pulsed infrared energy to detect objects.

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50. A 100 Watt 120 Volt CCTV power supply consumes how many amps?

Explanation

The correct answer is 0.83 amps. To calculate the amperage, we can use the formula P (power in watts) = V (voltage in volts) x I (current in amps). Rearranging the formula, we can find that I = P / V. Plugging in the values, we get I = 100W / 120V = 0.83 amps. Therefore, a 100 Watt 120 Volt CCTV power supply consumes 0.83 amps.

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51. Which of the following best describes the rule for running wire in a return-air plenum ceiling?

Explanation

The correct answer is "all conductors must be either in conduit or rated for installation in plenum ceilings." This means that when running wire in a return-air plenum ceiling, the conductors must be either enclosed in conduit or specifically designed and rated for installation in plenum ceilings. This is to ensure safety and compliance with regulations, as plenum ceilings are spaces that can potentially contain air circulation systems and can pose fire hazards if not properly wired.

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52. Is it permissible to run access control wiring in an elevator shaft?

Explanation

It is not permissible to run access control wiring in an elevator shaft.

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53. A 1000 ohm resistor with 5 volts across it has how much current flowing through it?

Explanation

The current flowing through a resistor can be calculated using Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). In this case, the voltage across the resistor is 5 volts and the resistance is 1000 ohms. By substituting these values into the formula, we can calculate the current as 5.0 mA (milliamperes).

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54. The insulating material in a capacitor is called the

Explanation

A dielectric is the insulating material used in a capacitor. It is a non-conductive substance that is placed between the two conductive plates of a capacitor to separate them and prevent electrical current from flowing directly between them. The dielectric material increases the capacitance of the capacitor by storing electrical energy in its electric field. Fiberglass, resistor, and semi-conductor are not typically used as dielectric materials in capacitors.

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55. Disconnected from the control, an N/C alarm circuit with a correctly installed 5.6K end of line resistor and a open device on the loop will show a total circuit resistance of

Explanation

When the N/C alarm circuit is disconnected from the control and there is an open device on the loop, it means that the circuit is not complete and there is a break in the circuit. In an open circuit, there is no continuous path for the electric current to flow, resulting in infinite resistance. Therefore, the total circuit resistance in this scenario would be an open circuit.

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56. Is it permissible to run exposed non-metallic sheathed cable on a vertical wall?

Explanation

The correct answer is "yes, provided the cable is protected from physical damage up to 1.5 m from the floor." This means that it is permissible to run exposed non-metallic sheathed cable on a vertical wall as long as it is protected from physical damage within 1.5 meters from the floor. This protection can be in the form of a heavy rubber coating or any other suitable means to prevent damage to the cable.

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57. The organization formed to provide standards for alarm devices and installation in canada is called

Explanation

ULC stands for Underwriters Laboratories of Canada. It is an organization that provides standards for alarm devices and installation in Canada. They are responsible for testing and certifying products to ensure their safety and performance. ULC standards are widely recognized and trusted in the industry, making them an important organization for maintaining quality and reliability in alarm systems in Canada.

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58. Which of the following is not true

Explanation

The correct answer is "insulation thickness determines the current capacity of a wire." This statement is not true because insulation thickness does not determine the current capacity of a wire. The current capacity of a wire is determined by its cross-sectional area and the material it is made of. Thicker insulation may provide better protection against external factors, but it does not directly affect the wire's ability to carry current.

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59. In a parallel circuit, the voltage across each branch:

Explanation

In a parallel circuit, the voltage across each branch is always equal to the source voltage. This is because in a parallel circuit, the voltage across each branch is the same as the voltage across the source. This is because the voltage is divided equally among the branches, and the total voltage across the branches adds up to the source voltage. Therefore, the voltage across each branch in a parallel circuit is always equal to the source voltage.

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60. A single diode can be used to change the direction of the current flow.

Explanation

A single diode cannot change the direction of current flow. A diode is a semiconductor device that allows current to flow in one direction and blocks it in the opposite direction. It acts as a one-way valve for current. Therefore, a diode can only allow current to flow in one direction, but it cannot change the direction of current flow. Hence, the statement is false.

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61. A passive infrared detector detects

Explanation

A passive infrared detector detects changes in ambient energy. This means that it can sense variations in the surrounding energy levels, such as changes in temperature, heat, or infrared radiation. This type of detector is commonly used in security systems to detect movement or presence of living beings in a protected area. By detecting changes in ambient energy, the detector can trigger an alarm or other response to alert the user of potential intruders or activity in the area.

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62. Photoelectric beams must be installed as close as possible to the fence being protected maximum protection.

Explanation

The statement is false because photoelectric beams should be installed at a distance from the fence being protected to ensure maximum protection. Placing the beams too close to the fence may result in false alarms or the beams being easily bypassed by intruders. Therefore, it is important to have an adequate distance between the beams and the fence for effective security.

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63. The two controls which allow the installer to fine tune the microwave portion of a dual detector are

Explanation

The correct answer is range and sensitivity. The installer can fine tune the microwave portion of a dual detector by adjusting the range, which determines the distance at which the detector can detect motion, and sensitivity, which determines how sensitive the detector is to small movements. By adjusting these two controls, the installer can optimize the performance of the dual detector and ensure accurate motion detection.

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64. A security license obtained from the ministry of the solicitor general's programs division is

Explanation

The correct answer is "required by any employee of a security company." This means that all employees working for a security company are mandated to obtain a security license from the ministry of the solicitor general's programs division. This license is necessary for any individual employed in the security industry, regardless of their specific role or level of experience.

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65. When checking the polarity of a phone line, the positive test lead of the meter should be connected to

Explanation

When checking the polarity of a phone line, the positive test lead of the meter should be connected to the "tip" of the phone line. The tip is the positive terminal of the phone line, and connecting the positive test lead to it allows for accurate measurement of the voltage or polarity.

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66. A "Pet Proof" detector can ignore any number of real targets in its field of view, as long as their total combined weighs do not exceed the device specifications

Explanation

A "Pet Proof" detector cannot ignore any number of real targets in its field of view, regardless of their total combined weight.

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67. When installing a magnetic door sensor as part of a security system, where should the sensor and its magnet be placed?

Explanation



In a typical installation of a magnetic door sensor, the sensor itself is mounted on the door frame, stationary, while the magnet is attached to the door, the part that moves. This setup ensures that when the door is closed, the magnet comes close to the sensor, closing the circuit and signaling that the door is securely closed. When the door opens, the magnet moves away, breaking the circuit and triggering the alarm if the system is armed. This method reliably monitors the opening and closing of doors.
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68. A "Dead Zone" in a PIR motion detectors field of view is

Explanation

A "Dead Zone" in a PIR motion detectors field of view refers to an area between PIR motion detectors "beams". This means that there is a gap or space where the detectors' coverage does not overlap, resulting in a zone that is not effectively monitored by the motion detectors. This can lead to potential blind spots where motion may go undetected, reducing the overall effectiveness of the system in detecting movement.

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69. Two identical voltmeters are placed in series across a 12V DC supply. Each meter reads

Explanation

When two identical voltmeters are placed in series across a 12V DC supply, the total voltage across both meters is divided equally. Therefore, each meter will read half of the total voltage, which is 6V DC.

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70. Three 1.5 V cells in parallel form a

Explanation

When cells are connected in parallel, their voltages remain the same and their capacities add up. In this case, three 1.5 V cells are connected in parallel, which means the voltage remains at 1.5 volts. Therefore, the correct answer is a 1.5 volt battery.

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71. How many levels of communication are listed in ULC?

Explanation

The correct answer is 4 because it is stated in the options. The question asks about the number of levels of communication listed in ULC, and the options provided are 1-5, 1-4, 4, and 3. Out of these options, only the option "4" matches the question and indicates that there are four levels of communication listed in ULC.

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72. Providing it performs no alarm installation work of any kind, a security business license (sales only) can be issued to a company without anyone in the company having a TQ

Explanation

A security business license (sales only) can be issued to a company without anyone in the company having a TQ because the license is specifically for sales and does not involve any alarm installation work. Therefore, it is not necessary for anyone in the company to have a TQ, which is typically required for individuals involved in alarm installation work.

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73. What is the total current draw, in amps, of 8 motion detectors if each device consumes 26 mA?

Explanation

The total current draw of the 8 motion detectors can be calculated by multiplying the current consumed by each device (26 mA) by the number of devices (8). This gives us a total current draw of 208 mA. To convert this to amps, we divide by 1000, resulting in 0.208 A. Therefore, the correct answer is 0.208 A.

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74. The data "bits" on the magnetic stripe of a access card can be copied by anyone with a card printer

Explanation

The given statement is true because the data stored on the magnetic stripe of an access card can indeed be copied by anyone with a card printer. Magnetic stripe cards use a simple encoding system that can be easily replicated, making them vulnerable to unauthorized duplication. This is why additional security measures, such as encryption or the use of more advanced technologies like smart cards, are often implemented to prevent unauthorized access or fraud.

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75. What is the maximum number of bends allowed in a run of conduit?

Explanation

The correct answer is any combination of bends to a total of 360 degrees. This means that you can have multiple bends in a run of conduit as long as the total angle of all the bends combined does not exceed 360 degrees. This allows for flexibility in the installation process while still ensuring that the conduit remains within acceptable limits.

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76. A person moving toward an ultrasonic causes

Explanation

When a person is moving towards an ultrasonic source, the frequency of the sound waves they hear increases. This is known as the Doppler effect. The increase in frequency results in a higher pitch of the sound. Therefore, the correct answer is a positive Doppler shift.

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77. The equation for Watt's Law is

Explanation

The correct answer is "all of the above" because all three equations mentioned (P=I2r, P=I x E, P=(E)(E) /R) are valid representations of Watt's Law. Watt's Law states that power (P) is equal to the product of current (I) and voltage (E), or power is equal to the square of current multiplied by resistance (R). Therefore, all three equations are correct and can be used to calculate power in different scenarios.

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78. The source voltage is divided among resistors in a circuit.

Explanation

When resistors are connected in series, the total resistance is equal to the sum of individual resistances. According to Ohm's law, V = IR, where V is the voltage, I is the current, and R is the resistance. In a series circuit, the same current flows through each resistor. Therefore, the voltage is divided among the resistors based on their individual resistance values. The resistor with higher resistance will have a larger voltage drop, while the resistor with lower resistance will have a smaller voltage drop. Hence, the correct answer is "if they are in series."

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79. Voltage drop across a device is calculated by

Explanation

The voltage drop across a device is calculated by multiplying the current through it by its resistance. This is determined by Ohm's Law, which states that the voltage drop (V) is equal to the current (I) multiplied by the resistance (R), V = I * R. Therefore, to find the voltage drop, we need to know the current flowing through the device and the resistance of the device.

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80. Microwaves in a "Dual Tec" detector can be disturbed by

Explanation

Moving fan blades can disturb the microwaves in a "Dual Tec" detector. This is because the motion of the fan blades can disrupt the flow of microwaves, causing interference or false readings in the detector. The movement of the blades can create fluctuations in the microwave signals, leading to inaccurate detection or triggering of the detector. Therefore, it is important to ensure that the fan blades are not in close proximity to the detector to avoid any disturbances in its functioning.

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81. Which are the following formats does not support a four digit account number?

Explanation

The format "3/1" does not support a four-digit account number because it consists of two digits separated by a forward slash, indicating a division or ratio. It does not provide enough space to accommodate a four-digit number.

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82. In an alarm system installed without an electrical permit, the installer can work after hours installing the transformer only if

Explanation

In an alarm system installed without an electrical permit, the installer can work after hours installing the transformer only if they contact the central station and receive authorization. This means that the installer must inform the central station about their intention to work after hours and wait for their approval before proceeding with the installation. Simply notifying the central station after the technician is finished is not sufficient. The client's authorization alone is also not enough to work after hours without an electrical permit. Installing outside of normal business hours is not allowed unless the central station has been contacted and authorized the installer.

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83. When the plug on a properly installed 8 position jack is removed

Explanation

When the plug on a properly installed 8 position jack is removed, the premises telephone will operate normally. This means that even without the plug, the telephone will still function as it should. The other options can be ruled out because they suggest that the telephone will not work properly or that the line seizure function will be affected, which is not the case according to the correct answer.

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84. The best metal to use as a core for a magnetic door lock is

Explanation

Soft iron is the best metal to use as a core for a magnetic door lock because it has high magnetic permeability. This means that it can easily conduct and concentrate magnetic flux, making it ideal for creating a strong magnetic field. Soft iron also has low coercivity, meaning it can be easily magnetized and demagnetized. Additionally, soft iron is relatively inexpensive and readily available, making it a practical choice for magnetic door locks.

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85. What is the minimum burial depth allowable for a communication cable in a vehicular area?

Explanation

The minimum burial depth allowable for a communication cable in a vehicular area is 900 mm. This depth is necessary to ensure the cable is adequately protected from potential damage caused by vehicular traffic. A deeper burial depth provides a greater level of protection and helps to prevent accidental damage to the cable, ensuring reliable communication infrastructure.

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86. A zone locator or zone identification LED is used with the PIR motion detector to

Explanation

The zone locator or zone identification LED is used with the PIR motion detector to decide which zones to mask if an area poses certain ambient problems. This means that the LED helps in determining which areas should be ignored or excluded from the detection process in order to avoid false alarms or unwanted triggers caused by environmental factors. By masking certain zones, the PIR motion detector can focus on detecting motion in the relevant areas, improving its accuracy and effectiveness.

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87. The best protection of an area, using an ultrasonic, is obtained of the detector is placed so that

Explanation

Placing the detector in a position where the likely intruder motion is toward or away from the detector ensures the best protection of an area using an ultrasonic. This positioning allows the detector to effectively detect any movement of the intruder as they approach or move away from the detector. By focusing on detecting motion in this specific direction, the detector can accurately identify potential threats and trigger appropriate alarms or security measures.

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88. What is the maximum VA output of a class I transformer?

Explanation

The maximum VA output of a class I transformer is 1000 VA. VA stands for Volt-Ampere, which measures the apparent power of an electrical circuit or device. In this case, the transformer is capable of delivering a maximum apparent power of 1000 VA.

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89. Microwave detetors cannot penetrate through

Explanation

Microwave detectors cannot penetrate through metal because metal is a highly reflective material for microwave radiation. When microwaves encounter metal, they are reflected back rather than passing through it. This property of metal makes it an effective barrier for microwave detection.

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90. An alarm installer may connect a digital dialer directly to the telephone network

Explanation

An alarm installer cannot connect a digital dialer directly to the telephone network. In order to connect a digital dialer to the telephone network, it requires the use of a telephone line interface device or a central monitoring station. This is because the digital dialer needs to be properly connected and configured to ensure reliable communication with the telephone network and the alarm system. Connecting it directly without the necessary interface or monitoring station can lead to communication issues and unreliable alarm monitoring.

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91. A resistor R1 is connected to a power supply. If another resistor R2 is connected in parallel to the same power supply, how much current will flow out of the power supply, as compared to the first circuit, if 2XR1 = R2?

Explanation

When a resistor R2 is connected in parallel to the power supply, the total resistance of the circuit decreases. According to Ohm's Law (V = IR), as the resistance decreases, the current flowing through the circuit increases. In this case, since 2XR1 = R2, the total resistance of the circuit is reduced by half. Therefore, the current flowing out of the power supply will be 1.5 times as much as the first circuit.

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92. In a parallel circuit, the currents in the individual branches flow equally only if

Explanation

In a parallel circuit, the currents in the individual branches flow equally only if all V/R values are identical in the branches. This means that the voltage-to-resistance ratio (V/R) must be the same in each branch. If the V/R values are different, the currents in the branches will also be different, resulting in an unequal distribution of current. Therefore, for equal currents to flow in each branch, the V/R values must be identical.

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93. Which of the following is true? (At normal temperatures)

Explanation

All objects give off infrared radiation at normal temperatures. This is because all objects emit thermal radiation, which includes infrared radiation, as a result of their temperature. The amount of infrared radiation emitted by an object depends on its temperature, with hotter objects emitting more infrared radiation. Therefore, even inanimate objects at normal temperatures still emit infrared radiation.

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94. The microwave detector

Explanation

The correct answer is "all of the above" because the microwave detector relies on a doppler shift of frequency to trigger, which means it detects changes in frequency caused by the movement of objects. It also transmits an invisible electromagnetic wave, which allows it to detect objects without being visible. Additionally, microwaves easily penetrate glass, allowing the detector to work effectively even when there is a barrier.

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95. Running cable across the tops of open joists in an attic is permitted if

Explanation

Running cable across the tops of open joists in an attic is permitted if the height of the ceiling at that point is less than 1 meter. This means that as long as the distance between the top of the joists and the ceiling is less than 1 meter, it is acceptable to run the cable across. This requirement ensures that there is enough clearance for the cable and reduces the risk of damage or interference with the ceiling.

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96. The sensor of a PIR motion detector is called a

Explanation

A PIR motion detector is designed to detect changes in infrared radiation caused by a moving object. The sensor used in a PIR motion detector is called a pyroelectric sensor. This type of sensor is made from pyroelectric materials that generate an electric charge when exposed to heat or infrared radiation. When a person or object moves within the detection range of the PIR motion detector, the pyroelectric sensor detects the change in infrared radiation and triggers the motion detection alarm. Therefore, the correct answer is pyroelectric sensor.

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97. The minimum allowable distance between parallel runs of low-voltage alarm wire and high voltage wire is

Explanation

The correct answer is 50 cm. This distance is necessary to prevent interference or potential damage to the low-voltage alarm wire caused by the high voltage wire. Keeping a minimum distance of 50 cm ensures that there is enough separation between the two wires to maintain safety and proper functioning of the alarm system.

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98. Circuitry developed to eliminate false alarms in passive infrared detectors due to internal sensor noise is

Explanation

A quad-element circuitry is designed to eliminate false alarms in passive infrared detectors caused by internal sensor noise. This circuitry consists of four separate sensor elements that are strategically positioned to detect motion accurately. By using multiple sensor elements, the quad-element circuitry can differentiate between genuine motion and sensor noise, reducing false alarms. This technology improves the reliability and effectiveness of passive infrared detectors in detecting actual movement and minimizing false alarms.

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99. Spacers on a magnetic contact-mounted on a steel door help to

Explanation

Spacers on a magnetic contact-mounted on a steel door help to improve the operating range or gap. By adding spacers, the magnetic contact can be adjusted to ensure proper alignment and reduce any potential shrinkage or gaps between the door and the contact. This allows for better performance and functionality of the magnetic contact, enhancing its operating range or the maximum distance at which it can effectively detect the opening or closing of the door.

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100. The most common way to protect an alarm circuit against compromise from bypassed wiring is to use

Explanation

A 24 hour tamper loop is the most common way to protect an alarm circuit against compromise from bypassed wiring. This loop is designed to detect any tampering or attempts to disable the alarm system. It operates continuously, 24 hours a day, and any interruption or tampering with the loop will trigger an alarm. This ensures that the alarm system remains active and functional, even if someone tries to bypass the wiring or tamper with the circuit.

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101. The frequency of signal emitted by an ultrasonic detector is within which range?

Explanation

Ultrasonic detectors emit sound waves with frequencies higher than the upper limit of human hearing, which is 20 kHz. The given answer, 25-30 KHz, falls within this range and is therefore correct. Frequencies in the range of kilohertz are commonly used for ultrasonic applications such as distance measurement, object detection, and medical imaging. Higher frequency ranges such as megahertz and gigahertz are typically used for more specialized applications like material testing and industrial inspections.

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102. Which of the following are the two most common acknowledge tones given by the alarm receiver to the digital dialer?

Explanation

The two most common acknowledge tones given by the alarm receiver to the digital dialer are 1400 Hz and 2300 Hz.

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103. What type of network would a cellular alarm back-up transmitter be connected to?

Explanation

A cellular alarm back-up transmitter would typically be connected to a cellular network, which is not mentioned as an option in the given choices. DVACS, intranet, and multiplex are not the appropriate types of networks for a cellular alarm back-up transmitter. Therefore, the correct answer is "none of the above".

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104. The voltage measured across the bus bars in a single-phase system is

Explanation

The voltage measured across the bus bars in a single-phase system is 240 VAC. This is the correct answer because in a single-phase system, the voltage is typically 120 VAC for residential applications and 240 VAC for commercial and industrial applications. Therefore, 240 VAC is the appropriate voltage measurement for the bus bars in a single-phase system.

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105. Which of the following does not provide cut-line protection for central station

Explanation

A digital dialer is a device used for transmitting alarm signals from a central station to a monitoring center via telephone lines. It does not provide cut-line protection for the central station because it relies on the telephone lines, which can be easily cut or tampered with by intruders. Cut-line protection is important to ensure that the central station remains connected and able to receive alarm signals even if the communication lines are compromised.

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106. The transmitting component of an ultrasonic is a device which converts

Explanation

The transmitting component of an ultrasonic device is responsible for converting electrical energy into mechanical energy. This means that it takes the electrical energy supplied to it and transforms it into mechanical vibrations or waves, which are then transmitted as ultrasonic waves. This conversion allows the device to generate the necessary vibrations that are used for various applications such as imaging, cleaning, or measuring distances.

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107. Voltage measured across an open switch is

Explanation

When a switch is open, it does not allow any current to flow through it. Therefore, there is no voltage drop across the switch. The voltage measured across an open switch is the same as the source voltage because there is no load to cause any voltage drop. So, the correct answer is "the same as the source voltage."

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108. How dose pulse-count technology benefit a PIR motion detector?

Explanation

Pulse-count technology benefits a PIR motion detector by making it more target discriminating. This means that the detector is able to distinguish between different types of movement and accurately detect whether the movement is towards the detector or not. This technology helps in reducing false alarms and increasing the accuracy of the detector in detecting intruders. By requiring multiple elements to be triggered before generating an alarm, it ensures that the detected movement is intentional and not caused by external factors such as pets or environmental changes.

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109. With regards to transmitter line security, any dedicated line system can detect transmitter substitution

Explanation

Transmitter substitution refers to the act of replacing a transmitter with a different one. The statement suggests that any dedicated line system can detect this substitution. However, this statement is not true. While dedicated line systems may have security measures in place, they may not necessarily be able to detect transmitter substitution. Therefore, the correct answer is false.

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Which of the following is an environmental sensor?
Where should an alarm installer keep her licence
The names of the contact on a SPDT relay are
The primary goal of a security system is
A RJ-45 jack can be used in place of a RJ-31
When running cable in a drop ceiling, if you wish to cross a firewall
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In an electric door strike, the term "fail secure" means
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A step down transformer
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Which of the following groups of ambient conditions are those to be...
The frequency of ultrasonic waves goes unchanged when reflecting off
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Infrared radiation is a form of
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The amount of voltage drop across a short circuit:
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A motion detector in an alarm system detects motion
Dual-technology detectors have the advantage of
Which dialer format will transmit information the most quickly?
A ULC fire alarm certificate may issued by
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A 4.5 amp-hour battery will provide 300 mA of current for
Which of the following is true?
A PIR motion sensor creates zones of detection to cover a large area...
Photo-electric beams transmit
A 100 Watt 120 Volt CCTV power supply consumes how many amps?
Which of the following best describes the rule for running wire in a...
Is it permissible to run access control wiring in an elevator shaft?
A 1000 ohm resistor with 5 volts across it has how much current...
The insulating material in a capacitor is called the
Disconnected from the control, an N/C alarm circuit with a...
Is it permissible to run exposed non-metallic sheathed cable on a...
The organization formed to provide standards for alarm devices and...
Which of the following is not true
In a parallel circuit, the voltage across each branch:
A single diode can be used to change the direction of the current...
A passive infrared detector detects
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A security license obtained from the ministry of the solicitor...
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A "Dead Zone" in a PIR motion detectors field of view is
Two identical voltmeters are placed in series across a 12V DC...
Three 1.5 V cells in parallel form a
How many levels of communication are listed in ULC?
Providing it performs no alarm installation work of any kind, a...
What is the total current draw, in amps, of 8 motion detectors if each...
The data "bits" on the magnetic stripe of a access card can be copied...
What is the maximum number of bends allowed in a run of conduit?
A person moving toward an ultrasonic causes
The equation for Watt's Law is
The source voltage is divided among resistors in a circuit.
Voltage drop across a device is calculated by
Microwaves in a "Dual Tec" detector can be disturbed by
Which are the following formats does not support a four digit account...
In an alarm system installed without an electrical permit, the...
When the plug on a properly installed 8 position jack is removed
The best metal to use as a core for a magnetic door lock is
What is the minimum burial depth allowable for a communication cable...
A zone locator or zone identification LED is used with the PIR motion...
The best protection of an area, using an ultrasonic, is obtained of...
What is the maximum VA output of a class I transformer?
Microwave detetors cannot penetrate through
An alarm installer may connect a digital dialer directly to the...
A resistor R1 is connected to a power supply. If another resistor R2...
In a parallel circuit, the currents in the individual branches flow...
Which of the following is true? (At normal temperatures)
The microwave detector
Running cable across the tops of open joists in an attic is permitted...
The sensor of a PIR motion detector is called a
The minimum allowable distance between parallel runs of low-voltage...
Circuitry developed to eliminate false alarms in passive infrared...
Spacers on a magnetic contact-mounted on a steel door help to
The most common way to protect an alarm circuit against compromise...
The frequency of signal emitted by an ultrasonic detector is within...
Which of the following are the two most common acknowledge tones given...
What type of network would a cellular alarm back-up transmitter be...
The voltage measured across the bus bars in a single-phase system is
Which of the following does not provide cut-line protection for...
The transmitting component of an ultrasonic is a device which converts
Voltage measured across an open switch is
How dose pulse-count technology benefit a PIR motion detector?
With regards to transmitter line security, any dedicated line system...
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