Phys Flashcards
fault
temp loss
blackout
long loss
sag
temp low volt
brownout
long low volt
spikes
temp high volt
surge
long high volt
Four classes of fire extinguishers are
a: wood, paper, ect
b: Flammable liquids and gas
c: Electrical wiring
d: Metals
k: Cooking oils
the lower the gauge number, the the wire diameter. Larger or smaller
larger.
Mesh sizing is the minimum clear distance between the wires. Common mesh sizes are 2 inches, 1 inch, and 3/8 of an inch.
chain-link fence sizes:
extremely high security = 3/8 inch mash, 11 gauge.
Very high-security = 1 inch mesh, 9 gauge.
High-security = 1 inch mesh, 11 cage.
Greater security = 2 inch mesh, 6 gauge.
Normal industrial security =2 inch mesh, 9 gauge.
gauge and mesh size of chain-link fence
PIDAS (Perimeter intrusion detection and assessment system) is a type of fencing with sensors. There are four basic classifications:
I residential usage
II: commercial usage
III:Industrial usage
IV: restricted access
When someone opens a door the air goes out an outfit air does not come and what type of pressurization is this
Positive pressurization
___ humidity Can cause corrosion, and low humidity and static electricity
high
transient power
short duration of line noise
Classes of Fires A, B, C, D, K
A: Wood, paper, cloth, trash. B: flammable liquids (oil, paint, gas) C: live electrical equip D: comustible metals and alloys K: cooking media (vege oil, fats, animal oil)
Shallow depth focus
sees smaller details. “foreground focus, blurry bg”
