1.
Protected Premises Fire Alarm System is
Correct Answer
C. Both a & b
Explanation
A Protected Premises Fire Alarm System is the most basic type of fire alarm system. It is designed to be initiated manually, meaning that it can be activated by a person in case of a fire emergency. Therefore, the correct answer is "Both a & b" as it encompasses both the basic nature of the system and its manual initiation feature.
2.
Automatic Alarm Systems
Correct Answer
A. Signals through dedicated wire pairs, leased telephone lines, fiber-optic cable, or wireless communications link
Explanation
Automatic alarm systems can transmit signals through dedicated wire pairs, leased telephone lines, fiber-optic cable, or wireless communications link. These systems are not limited to manual activation only, as they can be activated automatically based on certain triggers or events. However, they are known to have a high degree of false alarms compared to other systems.
3.
Basic types of automatic alarm-initiating devices include
Correct Answer
D. All of the above
Explanation
The correct answer is "All of the above" because all three types of automatic alarm-initiating devices mentioned (heat detectors, rate-of-rise heat detectors, and smoke detectors) are basic types of alarm-initiating devices. Heat detectors are designed to detect high temperatures, rate-of-rise heat detectors detect a rapid increase in temperature, and smoke detectors detect the presence of smoke. Therefore, all three types of devices can initiate an alarm in different scenarios.
4.
Two basic types of smoke detectors are
Correct Answer
B. Ionization & Photoelectric
Explanation
Smoke detectors are devices that detect the presence of smoke in the air and trigger an alarm to alert occupants of a potential fire. Ionization smoke detectors use a small amount of radioactive material to ionize the air inside the detector. When smoke enters the detector, it disrupts the ionization process and triggers the alarm. Photoelectric smoke detectors, on the other hand, use a light source and a photosensitive sensor. When smoke particles enter the detector, they scatter the light, which is detected by the sensor, causing the alarm to sound. Therefore, the correct answer is Ionization & Photoelectric, as these are the two basic types of smoke detectors commonly used.
5.
Photoelectric smoke detectors are
Correct Answer
A. More sensitive to smoldering fires
Explanation
Photoelectric smoke detectors are more sensitive to smoldering fires because they use a light source and a light sensor to detect smoke particles. When smoke enters the detector, it scatters the light, causing the sensor to trigger the alarm. Smoldering fires produce larger smoke particles that are more easily detected by the photoelectric technology, making these detectors more responsive to this type of fire. On the other hand, ionization smoke detectors are more responsive to flaming fires, as they use a small amount of radioactive material to ionize the air and detect the changes in electrical current caused by smoke particles.
6.
Ionization smoke detectors are
Correct Answer
C. More responsive to flaming fires
Explanation
Ionization smoke detectors are more responsive to flaming fires because they are designed to detect small particles of combustion that are produced by fast-burning, flaming fires. These detectors use a small amount of radioactive material to ionize the air inside the detector. When smoke enters the detector, it disrupts the ionization process, triggering the alarm. On the other hand, photoelectric detectors are more sensitive to smoldering fires, as they use a light source and a photosensitive sensor to detect the presence of smoke. When smoke particles enter the detector, they scatter the light, which then triggers the alarm.
7.
The value of automatic sprinklers in providing safety to the occupants of a structure include
Correct Answer
D. All of the above
Explanation
Automatic sprinklers provide safety to the occupants of a structure in multiple ways. Firstly, they provide a better chance of survival for occupants on the upper floors by quickly suppressing the fire and preventing it from spreading. Secondly, they discharge water directly into the fire, effectively extinguishing it. Lastly, they limit the products of combustion, reducing the amount of smoke and toxic gases that can harm the occupants. Therefore, the correct answer is "All of the above."
8.
Fire department connection is
Correct Answer
D. Both a & c
Explanation
The correct answer is "Both a & c" because a fire department connection is usually a Siamese connection with two 2 ½” female connections with a clapper valve or one clapper large-diameter inlet. It is also located outside the building.
9.
Water flow alarm
Correct Answer
B. Located outside the building, usually close to the sprinkler connection
Explanation
The correct answer is located outside the building, usually close to the sprinkler connection. This is because a water flow alarm is designed to indicate a problem with the water flow to the sprinkler system. It is typically installed outside the building near the sprinkler connection to monitor the flow of water and detect any potential issues such as a lack of water flow.
10.
The dry pipe sprinkler valve is equipped with an air pressure gauge above the clapper and a water pressure gauge below the clapper. The air pressure gauge will read.
Correct Answer
B. Substantially lower than the water pressure gauge
Explanation
The air pressure gauge will read substantially lower than the water pressure gauge because in a dry pipe sprinkler system, the pipe is filled with pressurized air instead of water. When a fire is detected, the air pressure is released, allowing water to flow into the pipes and activate the sprinkler heads. Therefore, the air pressure gauge will show a lower reading compared to the water pressure gauge, which measures the water pressure in the system.