Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
power
|
energy / time
|
|
|
B.T.U.
|
British Thermal Units
|
|
|
sustainable design
|
design that will have overall beneficial effects on productivity, heat, resources, econonmics (water and heat conservation)
|
|
|
what is the function of plumbing facilities in buildings?
|
-convenince
-accommodate the fluctuation in a building -occupants avoid congestion |
|
|
fire sprinkler systems
|
A- Ordinary combustibles
B- liquids C- electrical D- Metals K- kitchen grease |
|
|
devices for fire detection
|
Manual alarm station
Thermal detector |
|
|
power(watts)
|
Volts x amps
|
|
|
Energy
|
power x time
|
|
|
Voltage Transformation
|
Voltage can be changed using simple peices of electrical equipment known as a transformer
|
|
|
what is stack effect in a high rise building?
|
depends heavily on the HVAC system to counteract the natural air movement in the building
|
|
|
when are fire Pumps used
|
they are used when the residual water pressure at the most remote sprinkler heads of an autmomatics sprinkler is inadequate
|
|
|
stand by power
|
involves the use of an engine driven generator so power is interrupted during startup and switching
|
|
|
digital signals
|
Are separate on/off pulses
|
|
|
if a motorized equipment rated for 50hz is connexted to 60hz system what will happen?
|
the motor runs 20 % faster as long as voltage is not changed
|
|
|
can Rigid non metallic conduit be placed in concrete?
|
is allowed to be cast in concrete and in wet soils
|
|
|
transformers change
|
AC not DC
|
|
|
Janis Tao text defines these levels of voltage
|
5 to 10%
|
|
|
voltage fluctuation
|
max even in unusual situations 5%
|
|
|
how is a power plant different from coal power
|
Nuclear is an closed system, coal is an open system
|
|
|
two reasons raceway fill is limited
|
1. prevent excesive overheating
2. to allow practical pulling of conductors |
|
|
what are two reasons raceway fill is limited?
|
1, reduce heat
2. make pulling wires easier |
|
|
list two differences to consider when installing rigid non metallic conduit.
|
it has to have a ground wire in it
you can thread the ends |
|
|
what are the precautions when threading rigid non metallic tubing
|
none because you cannot thread it
|
|
|
12 guage mc cable vs. 90Degree #12 conduit carry the same amps?
|
no, just because the conductors are the same dosent mean you carry the same amps
|
|
|
list two advantages of AC over DC
|
AC system has lower generation cost
Ac system is easier to convert |
|
|
what is allowable amapcity of single 90 rated 10 copper conductor vs. one with three in the same conduit
|
carry 30 amps b/c the heat is able to escape b/c there only one conductor opossed the three
|
