29 Questions
What are refuse chutes commonly used for in apartment houses?
Disposal of garbage
What must the pipes of a refuse chute be constructed from?
Non-combustible impervious materials
What is the main purpose of a dumbwaiter?
Transport lightweight freight
Where are dumbwaiters commonly used in department stores?
To transport merchandise from stock areas to selling or pickup counters
What is a common use of horizontal conveyors?
Transporting check-in baggage in airports
What is the voltage typically used in low-voltage electrical systems?
24 volts
How is a car moved in a hydraulic elevator?
The car is mounted on top of a piston that slides inside a hydraulic pressure cylinder.
What stops the pump in a hydraulic elevator when the car reaches the desired floor?
The pump automatically stops.
Why do hydraulic elevators lower faster than they rise?
Gravity affects the system.
What type of installations are hydraulic elevators mainly used for?
Low-rise installations.
What is the simplest and most effective method of elevator operation mentioned in the text?
In-ground method.
What can cause false alarms in motion detectors?
Noises such as telephones ringing
How do Passive Infrared (PIR) sensors detect intruders?
By detecting moving infrared radiation from a person against the radiation environment of a room
What can defeat a PIR sensor?
Blocking the sensor so it cannot pick up heat
Why is the proper location of a PIR detector critical?
To avoid false alarms caused by sunlight and HVAC systems
How can a PIR sensor be rotated for maximum coverage?
Up to 180°
What covers for periods of mains power isolation in a PIR sensor?
Battery back-up energy source
What are the basic components of an elevator system?
Elevator car, hoistway, landings, buffer, hall station, hall lantern, traveling cable, elevator controller, door interlock, emergency power
What is the purpose of a buffer in an elevator system?
To soften the force with which a car runs into the pit during an emergency
What is the function of a hall station in an elevator system?
It is a control panel located outside the elevator doorway in the corridor that houses the call button
What is the purpose of a traveling cable in an elevator system?
To provide an electrical connection between the car and outlet
Why is an elevator controller important in modern elevator systems?
It directs starting, acceleration, deceleration, and stopping of the elevator cab
What role does the door interlock play in an elevator system?
It prevents the operation of the elevator unless the hoistway door is locked in the closed position and prevents the opening of the hoistway doors from the landing side unless the elevator is in the landing zone
What is the function of a lateral backbone in a large building?
Horizontal distribution
What are some examples of horizontal pathways mentioned in the text?
Underfloor ducts, raised floors, underground trench ducts, raceways
What components are included in the horizontal cabling system?
Horizontal cabling, telecommunications outlet, table terminations, cross‐connections
What is the function of intelligent buildings described in the text?
Control the total building environment
How does a fire alarm system integrated with a building automation system facilitate evacuation?
Initiates communication to other systems, clears path for evacuation, triggers emergency power, captures elevators
What is the role of lighting systems in the context of life safety?
Assisting in security, lighting evacuation pathways
Explore the features and materials used in refuse chutes commonly found in apartment buildings. Learn about the vertical pipes, inlets, and possible recycling options available for better waste management.
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