Home Automation
Conduction
? is a simple concept where materials can transfer heat energy when they touch each other.
What can a serial port connect to?
Controllers Modems Sensors Switches
What are the most common user interface?
Remote control Incorrect Wall keypad
What is the most common and least expensive touch overlay technology?
Resistive
In addition to sensor readings throughout the house, what other factors can be taken into account by an intelligent controller before deciding how much heat or humidity to add or remove?
The day of the week The habits of the occupants The time of day
RS-422
was created as a high data rate, long-range replacement to the RS-232 standard.
To attach more complicated devices, such as controllers for subsystems
what is an RS-232 output typically used for?
radiant
what thermal transfer is unique in that it can happen through empty space.
Fluorescents use 25% to 35% as much power as incandescent, and can last over ? .
10,000 hours
What are the transmission limitations of RS-232 at a speed of 20 kilobits per second?
50ft
Application driven programming Proprietary code programming Standard code programming Wizard
? can be used to program a device using a PC.
Mood lighting
? is designed into the overall lighting scheme to provide atmosphere.
resistive
? touch overlay technology is susceptible to damage from sharp objects.
parity bit
A ? is an additional and optional bit added to the data bits to allow for a rudimentary form of error checking
programmable logic controller (PLC)
A ? is the heart of all systems, containing sensors and timers that control external electrical devices.
a primary connection between the controller and computer
A vast majority of controllers use the serial port as ?
scene
A(n) ? mode creates dramatic lighting levels in a particular room or area.
capacitive
A(n) ? touch overlay system detects the amount and location of the electrical charge that is transferred from the screen to the user when the screen is touched
hydronic
Any system that uses heated water as the medium of heat transfer is called a ? system.
What sensors are mounted into outdoor weather stations at weather centers?
Barometric pressure Dew point and humidity Rain Temperature Wind speed and direction
what accessory devices and sensors are used to add intelligence to integrated automation systems?
Contacts Electrical current sensors Light sensors Motion sensors Pressure sensors Temperature sensors Water sensors
Which of the following is a category of HVAC components?
Control components Delivery components Distribution components Source components
What variables should be considered when choosing a controller?
Cost Installation and programming complexity type and number of interfaces
What type of sensor can be used for tracking?
Door contacts Light beams Pressure sensors
either a radial or a trunk and branch system.
Duct work is often arranged in what way?
3
Each X10 data packet starts with at least ? cycles of silence.
Which of the following are commonly used types of user interfaces today?
Handheld remote controls Incorrect Keypad Incorrect Touchscreen
conduction, convection, radiation
How does heat transfer occur?
11
How many cycles of the power line voltage does each X10 data packet require?
16
How many house codes are provided by the X10 protocol?
256
How many unique addresses is the X10 protocol limited to?
16
How many unit codes are allowed on an X10 module?
20 to 40 times faster
How much faster is a UPB link than an X10 link?
True
In its basic form, a serial interface works by sending and receiving data one bit at a time over a single wire pair.
Which of the following is a primary function of a basic thermostat?
It determines if the AHU will run all the time or just when heating or cooling is needed. It maintains the temperature presets to control the source device. . It sends commands to tell the HVAC system whether to heat or cool the house
ambient noise
Voice activated devices work by constantly listening to the ? and processing sound as it is detected
Bits per second (bps) Parity Stop bits
What are a basic setting on an RS-232 link that determines how data is transferred?
Use filters to block the signals from leaving the house
What can be done if stray signals traveling outside the house become an issue when using X10 devices?
RS-422 RS-485
What communication protocol is used for longer distances and multiple device connections?
2.4 GHz 868 MHz 915 MHz
What frequency range does ZigBee operate in?
Each packet is sent twice
What is done with each X10 data packet to increase transmission reliability?
To determine if the device responds intermittently, or if the device never responds.
What is the first step to troubleshooting PLCs?
mercury vapor
What is the least efficient HID fixture lamp type?
250 kbps
What is the maximum data transfer rate for ZigBee?
8 bits
What is the most common setting for data bits when setting up an RS-232 link?
High pressure sodium
What is the most efficient HID fixture lamp type?
Metal Halide
What is the second most efficient HID lamp fixture type?
18 AWG 20 AWG
What is the standard wire size for thermostat wiring?
Between 25% and 60%
What relative humidity level is most likely present for personal comfort?
Between 73°F and 77°F
What should the air temperature be for personal comfort?
Convection
What type of heat transfer involves moving gasses or liquids?
Power line carrier
What was the first widely-used home automation protocol?
Any device that also uses the AC lines for transmitting signals, such as baby monitors, intercoms, and doorbells Large motor-driven appliances, such as refrigerators, heat pumps, and fans delevisions and computers
Which devices are commonly blamed for generating enough noise to cause X10 problems?
Bad modules Improperly installed modules Mistakes with device codes Signal loss or blockage
Which of the following can go wrong with a PLC system?
It eliminates the need to repeatedly send the same signals It greatly reduces the effects of signal attenuation.
Which of the following is an advantage to having signals up to 40 volts on a UPB system?
average humidity daily temperatures the amount of actual rainfall
With an automated water sprinkler system, the homeowner can program watering times based on ? .
20,000 hours
Xenon lamp life is rated up to ? .
RF (Radio Frequency)
Z-wave uses what technology?
Scene lighting Security lighting Vacation mode lighting
commonly-used lighting modes are for primary lighting control applications?
The integration controller
consolidates the monitoring and control of several individual automation subsystems into a single point.
Candelabra (E-12) Intermediate (E-17) Mogul (E-40)
incandescent bulb mount sizes
The PLC was initially developed as a way to control?
industrial manufacturing and testing processes
Ramping
refers to the time taken to switch from 0% intensity to some other light intensity, or the reverse.
