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問題一覧
1
A stoker that uses a feed RAM is a?
Underfeed stoker
2
What is a copper test used to test for?
Heat Exchanger
3
What color is R-404?
Orange
4
What color is R-407C?
Chocolate
5
Purpose of wet scrubbers?
Filter Flue Gases
6
What is fly ash mechanical collector?
Collects fly ash from boiler flue
7
First year of clean air act?
1963
8
Which coal has the highest volume of fixed carbon?
Anthracite
9
Cold junction of thermocouple measures?
Reference
10
How much water creates 1 pound of steam?
1 pound of water
11
Volume of steam at 0 psi greater then saturated liquid at 212 degrees?
1600-1700 times it’s volume
12
What does a dearator do?
Heats feed water and gets rid of non-condensables
13
R-22 replacement?
417A
14
19. Chilled water coil, active or passive dehumidifier?
Passive
15
What is it called when a gate valve is cracked open and the pressure destroys it?
Adhesion-degradation
16
At what temperature are brass and copper fittings not used on a boiler?
406/400 degrees
17
What type of system uses same pipe for return and supply?
One pipe
18
Where the condenser pump to?
Feed water system
19
What is a Hotwell?
Turbine condenser water is stored here
20
Percentage of oxygen in air?
21%
21
What’s an intercept valve?
Controlling steam flow from a high-pressure steam turbine to a low-pressure steam turbine. Closes with the main stops in a overspeed trip event.
22
What’s followed by a rotating blade on turbine?
Stationary blade
23
What creates Kinetic/Machanical in turbine?
Kinetic energy is the blades spinning from steam which moves the shaft. The mechanical energy is the rotor spinning causing the rotor to spin creating electrical energy
24
What happens to water in a boiler that is at 80% load and all of a sudden the flame goes out?
Water will shrink and cause a low water condition
25
How to prevent air getting into condenser system?
Gland seal/laberinyth. Condenser in vacuum
26
What type of boiler operates off on/off controls?
Package Firetube
27
Force and area represents?
Pressure
28
What causes overheating of boiler tubes?
Scale inside the tubes
29
How do you know if a dearating system isn’t working properly?
Using more oxygen scavenging chemicals
30
Why would a pump become steam bound?
Suction pressure drops low
31
When do you blow down a header on a water wall?
Under no load
32
Which element does not take an actual action in the combustion process?
Nitrogen
33
Which coal has the biggest level of fixed carbon content?
Anthracite
34
When is a pump steam bound?
Steam bound indicates the water is too hot for the suction of the pump, and the water flashes into steam with reduction of pressure
35
Primary purpose of using a wet scrubber?
To remove sulfur dioxides
36
Last valve to be closed before lighting off?
Exonomizer vent
37
Flow of steam through a superheater should never be less then ______ of boiler capacity
20%