Apartment Building Garbage Chute Systems

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 Signup and view all the answers

What is a common use of horizontal conveyors?

Transporting check-in baggage in airports Signup and view all the answers

What is the voltage typically used in low-voltage electrical systems?

24 volts Signup and view all the answers

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. Signup and view all the answers

What stops the pump in a hydraulic elevator when the car reaches the desired floor?

The pump automatically stops. Signup and view all the answers

Why do hydraulic elevators lower faster than they rise?

Gravity affects the system. Signup and view all the answers

What type of installations are hydraulic elevators mainly used for?

Low-rise installations. Signup and view all the answers

What is the simplest and most effective method of elevator operation mentioned in the text?

In-ground method. Signup and view all the answers

What can cause false alarms in motion detectors?

Noises such as telephones ringing Signup and view all the answers

How do Passive Infrared (PIR) sensors detect intruders?

By detecting moving infrared radiation from a person against the radiation environment of a room Signup and view all the answers

What can defeat a PIR sensor?

Blocking the sensor so it cannot pick up heat Signup and view all the answers

Why is the proper location of a PIR detector critical?

To avoid false alarms caused by sunlight and HVAC systems Signup and view all the answers

How can a PIR sensor be rotated for maximum coverage?

Up to 180° Signup and view all the answers

What covers for periods of mains power isolation in a PIR sensor?

Battery back-up energy source Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

What is the purpose of a traveling cable in an elevator system?

To provide an electrical connection between the car and outlet Signup and view all the answers

Why is an elevator controller important in modern elevator systems?

It directs starting, acceleration, deceleration, and stopping of the elevator cab Signup and view all the answers

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 Signup and view all the answers

What is the function of a lateral backbone in a large building?

Horizontal distribution Signup and view all the answers

What are some examples of horizontal pathways mentioned in the text?

Underfloor ducts, raised floors, underground trench ducts, raceways Signup and view all the answers

What components are included in the horizontal cabling system?

Horizontal cabling, telecommunications outlet, table terminations, cross‐connections Signup and view all the answers

What is the function of intelligent buildings described in the text?

Control the total building environment Signup and view all the answers

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 Signup and view all the answers

What is the role of lighting systems in the context of life safety?

Assisting in security, lighting evacuation pathways Signup and view all the answers