NEW
Font size
WorksheetsChapter II: Boiler Systems
Total questions: 25
Worksheet time: 6hrs 15mins
If a boiler is generating 20,000 lb/hr of steam, it must be supplied with ___ lb/hr of feedwater
10,000
20,000
30,000
40,000
From the deaerator, oxygen and other noncondensable gases are separated from the feedwater and directed toward the atmosphere ___
By Using the Closed Feedwater Heater
Through the Economizer
By Using Steam Traps
Through the Vent
A(n) ___ system is a system of measuring instruments and controllers that work together to control a process
Instrumentation
Feedwater
Control
Combustion
One pound of water is needed to produce ___ of steam
1 lb
3 lb
144 BTU
970.3 BTU
In a low pressure gas system, the ___ valve is an electric valve that cannot be opened until the gas pilot is lit
Check
Pressure-Regulating
Manual Reset
Pressure Reducing
___ are used for loads that require dry steam, such as turbines
Superheaters
Forced Draft Fans
Reclaimed Steam Lines
Automatic Non-Return Valves
In a feedwater system, the ___ valve is located closest to the shell of the boiler on the feedwater line so that the check valve can be repaired without draining (dumping) the boiler
Blowdown
Manual Reset
Stop
Automatic Non-Return
A steaming boiler can have the water from the gauge glass go from half full to empty in a matter of ___ if water is not added to the boiler
Minutes
Hours
Days
Weeks
Superheated Steam Has More ___ Than Saturated Steam at the Same Pressure
Heat Energy
Volume
Pressure
Moisture
The Deaerator Tank Is Located ___
Above The Feedwater Pumps
Below the Feedwater Pumps
After the Closed Feedwater Heater
Before the Centrifugal Pump
A gas pilot line on a high-pressure gas system supplies gas through a ___ valve to the pilot gas-pressure regulator
Check
Shutoff
Butterfly
Throttling
The purpose of any fuel oil system is to supply fuel oil to the burner at the proper ___
Volume and Pressure
Temperature and Volume
Temperature and Pressure
Viscosity and Speed
No. _ fuel oil needs to be heated before it is pumped so it can flow
2
3
4
6
Pulverizing coal allows ___
The Coal to be Stored Easily
For Better Burning on the Grates
For Closer Contact Between the Coal and Oxygen for Complete Combustion
For Easy Hand-Firing
Draft is ___ caused by a difference in pressure between two points
The Balance of Pressure
The Flow of the Air or Gases of Combustion
A Type of Back Pressure
The Stack Height
Natural draft is a result of temperature differences between ___
Fuel Oil and Air
Burning Coal and Sulfur
Air and Gases of Combustion
Fuel Oil and Gases of Combustion
In a low-pressure gas system, the air mixes with the gas in the ___
Injector
Gas Pilot Line
Burner Register
Pulverizer
A measuring instrument can use a ___ to send a signal to a controller
Control Valve
Final Element
Transmitter
Primary Element
Pulverized coal is ground into a fine powder and blown into the combustion chamber where it is burned in ___
Scales
Grates
Suspension
Large Particles
A control system uses a ___ to execute control strategy
Steam Pressure Gauge
Pressure Control Station
Feedwater Control Valve
Control Loop
Water weighs approximately ___ lb/gal
2.5
6.4
8.3
10.2
Induced draft is produced by pulling air through the boiler furnace with a fan located in the ___
Breeching
Inlet Damper
Combustion Chamber
Economizer
A control loop typically uses ___ as the control element
Pressure Transmitter
Modulating Water Valve
Temperature Sensor
Steam Pressure Controller
Codes may require that a(n) ___ be positioned before the firing-rate valve that controls the volume of gas to the burner
Equalizer
Manual Shutoff Valve
Flue Gas Analyzer
Pressure-Reducing Governor
In a fuel oil system, the purpose of duplex strainers is to ___
Isolate The Fuel Oil System in the Event of a Fire
Remove Water From The Fuel Oil
Prevent Return Flow To The Tank
Permit One Strainer To Be Cleaned While the Other Is In Service
