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”
Depth of field for lg area
wide angle lens and small lens opening. Depth of field refers to the portion of enviro in focus.
It + as the lens size opening -, subj distance + or focual length of lens -.
annunciator
can listen for noise and set off motion sensors/lights/CCTV.
