Escalator and Fire Sprinkler Systems PDF

1.This device consists of a motor-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal. Escalator 2\. Give 3 benefits of escalators. Capacity to move large numbers of people, No waiting interval, Control the traffic flow of people 3...

1.This device consists of a motor-driven chain of individual, linked steps that move up or down on tracks, allowing the step treads to remain horizontal. Escalator 2\. Give 3 benefits of escalators. Capacity to move large numbers of people, No waiting interval, Control the traffic flow of people 3\. 4 typical configuration options of escalators. Parallel, Crisscross, Multi parallel, Up escalator next to staircase 4\. Give 5 components of escalators. Truss, Handrail, Steps, Tracks, Safety devices 5\. Transports people across a horizontal or inclined plane over a short to medium distance. Moving walkway 6-9. Escalator Exterior 10\. Step Tread & Riser 11\. 4 primary uses and applications of escalators. Department stores/shopping, Public transportation, Factories and other industrial production environments, Military use 12\. Give 5 key safety features of escalators. Flat steps, Emergency stop button, Sensor switch, Safety instruction, Deflector brush 13-16. Escalator step widths. 17\. In order to clearly delineate the edges of each individual step, manufacturers offer steps trimmed in yellow, either painted or with plastic inserts. Step in demarcation lines 18\. A long continuous brush made of stiff bristles running up the sides of the escalator just above the step level. This helps deflect garments, shoes, and other items away from the gap between the moving steps and the skirt board. Deflector brush 19\. In automatic start/stop escalators, this sensor automatically engages the escalator motion when a rider is detected on the first step of the entrance landing platform, and stops the escalator when there are no riders on the unit. Sensor switch 20\. Stop the escalator if a foreign object gets caught between the steps and the comb plate on either end. Comb plate impact switches 21\. Escalator speeds vary from about \_\_\_ to\_\_\_. 90-180 feet per minute (27-55 meters per minute) 22\. It is used to isolate the water supply, and it may also be called the isolating valve. It is often painted red in color with a large black circular handle, and is locked in the OPEN position, allowing the free flow of water. Stop valve 23\. It is a valve that when exposed for a sufficient time to a temperature at or above the temperature rating of the heat sensitive element (glass bulb or fusible link) releases, allowing water to flow from only the affected sprinkler. Sprinkler head 24\. It is used to monitor the state (open or closed) of the Stop Valve. Valve monitor 25\. It is an electro-mechanical device that monitors the flow of water through a section of pipe within an automatic fire sprinkler system. Flow switch 26\. It is a mechanical device that is usually fitted to an automatic fire sprinkler system. Pressure gauge 27\. It is the collection of airborne solid and liquid particulates and gases emitted when a material undergoes combustion, mixed with the quantity of air that is mixed into the particulate mass. Smoke 28\. The glass bulb of a fire sprinkler head is filled with a \_\_\_ which expands to break the bulb at a specified temperature. Glycerin-based liquid 29\. Fire sprinkler head components 30-32. Sprinkler bulb temperature ratings (glass bulb colors) 33\. 4 types of sprinkler heads. Pendent, Upright, Sidewall, Concealed sprinkler head 34\. It sprays water upwards and the deflector, which is curved, deflects the water back down to produce a hemispherical spray pattern. Upright sprinkler head 35\. This sprinkler head is somewhat like pendent fire sprinklers; however, they\'re located within the ceiling, and they\'re hidden by a cover plate. Concealed sprinkler head 36-39. Sprinkler heads (illustration)  40\. 4 types of sprinkler system. Wet pipe, Dry pipe, Pre action, Deluge fire sprinkler system 41\. The air pressure holds a dry pipe valve closed and prevents water from entering the system. Dry pipe fire sprinkler system 42\. First, a heat or smoke detector must detect a fire which then sends a signal to open the pre- action valve. This fills the system with water. Next, a firm sprinkler head must detect an increased temperature to indicate a fire. Once, the firm sprinkler opens water immediately pours onto the fire. Pre-action fire sprinkler system 43\. Unlike the other types of fire sprinkler systems, these sprinkler heads always remain open and activate all at once. These systems also contain no water nor pressurized air. Once a heat or smoke detector detects smoke or heat, the valve opens and sends water to all the fire sprinklers. Deluge fire sprinkler system 44\. Smoke Detector (illustration). Smoke detector - Wikipedia 45\. When a fire sprinkler element reaches a designated temperature, it breaks and releases the water. Wet pipe fire sprinkler system 46\. This sprinkler protrudes through the wall and basically only have half of a deflector, which sprays water in a half circle or crescent shape. Sidewall sprinkler head 47\. It is a small valve, normally secured in the closed position. Alarm test valve 48\. Sprinkler Head (illustration) 49\. Stop Valve (illustration) 50\. Alarm Valve (illustration)