Test 3 Multiple Choice Flashcards
Oxygen and other noncondensable gases are separated from the feedwater______
In the closed feedwater heater
In the economizer
In the open dearator feedwater heater
In the open deaerator feedwater heater
Steam is extracted from the turbine after it has passed through some of the turbine stages to
Reduce back pressure
Increase back pressure
Prevent excessive speed withing the turbine
Be used for process work in the plant
Be used for process work in the plant
A surface condenser has water____.
And steam mixed together to create a vacuum
Passed through tubes to cause steam to condensate causing a vacuum
Passed through tubes to cause steam to condensate causing a vacuum
A draft fan located between the boiler and chimney is used in a ______ draft system
Natural
Forced
Induced
Furnace induction
Induced
When steam is superheated it has_______
A higher pressure thus producing more power
A large volume
More heat energy thus producing more work
A higher temperature and pressure
More heat energy thus producing more work
A vacuum on the exhaust side of the turbine
Reduce back pressure and steam flow rate
Reduce back pressure and increase water rate
Prevents excessive speed withing the turbine
Vacuum is never allowed on the turbine
Reduces back pressure and steam flow rate
The open feedwater heater is located
Above the feedwater pump
Below the feedwater pump
After the closed feedwater heater
Above the feedwater pump
Draft is defined as a difference in pressure that causes.
Air or gases to flow
A balance of pressure
A back pressure
Air or gases to flow
Air is mixed inside of the burner register in a_______gas system
Low pressure
High pressure
Equalizing
Fuel oil
High pressure
Gas leak should be located and repaired by a. ______
Boiler operator
Shift foreman
Fuel superintendent
Gas company representative
Gas company representative
Water weights approximately_____lb/gal
2
- 4
- 3
10
8.3
A______ pump returns condensate from the system back to the boiler
Fuel oil
Return
Gear
Vacuum
Vacuum
The feedwater ______ valve opens and closes automatically
Return
Bypass
Check
Equalizing
Check
An auxiliary low water fuel cutoff is installed
Slightly above the NOWL
Slightly below the primary low water fuel cutoff
At the highest point on the boiler
Slightly below the primary low water fuel cutoff
The______ maintain a constant water level in the boiler
Gauge glass
Water column
Blowdown tank
Feedwater regulator
Feedwater regulator
The low water fuel cutoff should be tested_____
Daily
Monthly
Semiannually
Annually
Daily
A______valve controls fluid flow by turning the valve handle to raise or lower the valve disc
Safety
Pressure relief
Glove
Backflow preventer
Glove
The most common feedwater pump is a____feedwater pump driven by an electric motor
Steam rotary
Generator
Centrifugal
Piston activated
Centrifugal
The purpose of the feedwater regulator is to________
Shut the boiler in the event of low water
Maintain a consistent water level in the boiler
Maintain a consistent water level in the boiler
The automatic makeup water feeder is located
Slightly below the NOWL
On the feedwater heater
Slightly below the NOWL
Feedwater regulator sensing elements are located
On the steam line
On the water line
At the NOWL
At the NOWL
Water temperature that is too low in the open feewater heater could cause____
Oxygen pitting in the boiler
Thermal shock in the boiler
Oxygen pitting in the boiler
Burning a fuel releases_____
Solar energy
Hydrogen gas
Heat energy
Heat energy
A vent line on a fuel oil tank prevents____
Loss of suction
Pressure buildup
Loss of pressure
Pressure buildup
A high suction line on a fuel oil tank is used when_____
The tank is full
The tank is low on fuel
Signs of sludge and water are evident in the tank
Signs of sludge and water are evident in the tank
The pneumercartor is used to_____
Indicate the fuel oil level in the tank
Supply primary air to the burner
Indicate gallons of makeup water used
Indicate the fuel oil level in the tank
An indication of a dirty fuel oil strainer would be_______across the strainer
A large pressure drop
An equalizing of pressure
A slight pressure drop
No change in pressure
A large pressure drop
Fuel oil heaters must be protected from excessive fuel oil pressure because they are located______in the pumps
Above
On the suction side
On the discharge side
They need no protection due to control line
On the discharge side
A gas pressure regulator is used to control the______
Flow of gases of combustion
Desired set pressure at the burner
Air flow going to the burner
Mixture of air and gases
Desired set pressure at the burner
To prevent caking and to dry the coal entering the pulverizer
Heating coils are used
Electric pipe heaters are used
Warm air is used
Dryers are used
Warm air is used
Blowers are used in a high pressure gas system to_____
Supply air for combustion
Remove gases of combustion
Regulate the flow of gas
Cool the combustion chamber
Supply air for combustion
The gas pressure regulator in the low pressure gas system reduces the gas pressure to______psi
0
5
10
16
0
The amount of gas drawn into the air stream in a low pressure gas system is controlled by the______
Manual reset valve
Check valve
Venturi effect
Flow control calve
Venturi effect
The underfeed stoker can burn
Only anthracite coal
Only bituminous coal
Anthracite or bituminous coal
Anthracite or bituminous coal
The thickness of the fuel bed on a chain grate stocker is regulated by a coal____
Conveyor
Scale
Hopper
Gate
Gate
