102E Flashcards
Small air handling systems include
Portable air conditioner
Window air conditioner
Wall air conditioner
Ductless split air conditioner
Evaporator capacities range between on small units
6000-18000
Ductless split evaporator capacities range between
6000-60000
Medium air handling systems include
Evaporative coolers
Terminal units
Makeup air
Commercial package systems
Trade name for evaporative cooler is
Swamp cooler
Terminal units
Add and remove heat after the central air handling init
Two types of fans
Centrifugal fans
Propellor fans
Is lubrication necessary on sleeve bearings
No
Roller bearings require lubrication
Yes
Propellor fans are called
Axial fans
Propeller fans push the air
Forward
Curved airfoil blade fan is the
Best efficiency
Centrifugal fans are non
Overloading
Propeller fans are
Overloading mechanisms
Never allow a Vbelt to run on the flat bottom surface
True or false
True
The 4L and 5L belts are
Light duty
A and B belts are for
Heavy duty
Do you lubricate a belt
No
A sheave is a wheel used to
Transfer mechanical energy
Outdoor air makes up for
10-20%
Mixing chambers combine both
Outdoor air and return air
Maintenance process is in
Mechanical
Electrical
Controls
Preventive maintenance
