Test 3 Multiple Choice Flashcards
(35 cards)
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
