BOILERS
One gallon of water weighs?
8.33lbs
How are particulates discharged into hoppers?
Rappers
What device opens at 75% of the motor's rated speed?
Centrifugal switch
What controls the axial position of the turbine?
Thrust bearing
Centrifugal pumps are classified as?
Vertical, horizontal, volute and double suction
What must be done to prevent flashback?
Purge
What year was the First regulation of the clean air act?
1963
A boiler requiring excessive amounts of oxygen-scavenging chemicals could indicate?
A malfunctioning DA
What is the slaker?
Method for introducing lime and water into flue gas.
Vapor bubbles forming and collapsing are called?
Cavitation
Steam at high viscosity is converted into ______engery?
Kinetic
Where is the flame-sensing device located?
On the front of the furnace
The corrugated furnace is used in vertical tubular or horizontal firebox boiler are called what type?
Adamson
Btus required to turn 1lb of water into 1lb of steam
970.3
Feedwater control valves are controlled by?
Water level, steam flow and feedwater flow
What is the cylinder color of R-407C?
Chocolate
Oil cooler pumps should be maintained at what temperature?
140-160 degrees F
Transformers are rated in?
KVA
The main two types of condensers are?
Direct contact and Surface Condensers
What type of hardness can be reduced by boiling water?
Temporary
What is the cylinder color of R-404A?
Orange
What controls the speed of the turbine?
Control speed governor
The advantages of an open feedwater heater is?
It removes oxygen faster
What is the process of a water softener?
Bachwash, brine, rinse, service
What should the temperature be when the water leaves the DA tank?
Within 3 to 5 degrees of the steam temperature.