Test 1 Multiple Choice Flashcards
A lead sulfide cell which is used for flame detection is sensitive to
Infrared light
Light
Heat
Temperature increases
Infrared light
Carbon dioxide in the flues gas is a sign of ________combustion
Perfect
Complete
Incomplete
Half-complete
Complete
The ON/OFF pressure control must be connected to the ________
Main steam line
Main feedwater line
Highest part of the steam side of the boiler
Water side of the boiler below the NOWL
Highest part of the steam side of the boiler
A slowly rising water level in the gauge glass indicates that_____
The top line is closed or clogged
The bottom line is closed or clogged
Both lines are closed or clogged
A good fireman is on duty
The top line is closed or clogged
The purge cycle of a combination gas/fuel oil boiler is___when burning fuel oil as when burning gas
The same
Shorter
Twice as long
Three times as long
The same
The purpose of the boiler modulating pressure control is to
Regulate the water flow
Prevent carryover
Start and stop the burner on steam pressure demand
Regulate the high and low firing rate of the burner
Regulate the high and low firing rate of the burner
Bituminous coal has a_____content
High volatile
High hydrogen
High fixed carbon
High ash
High volatile
Carbon monoxide in the flue gas is a sign of_____combustion
Perfect
Complete
Incomplete
Half incomplete
Incomplete
The valves located between the boiler and the water column are_______valves and must be locked and sealed open
Check
Os&y, or lever
Gate
Globe
Os&y, or lever
Pressure gauges are calibrated with an(a)
Pressure gauge pump
Orsat analyzet
Lightweight tester
Deadweight tester
Deadweight tester
Complete combustion is defined as burning all the fuel using_____
The theoretical amount of air
A minimal amount of excess air
No excess air
CO2 and CO
A minimal amount of excess air
________dioxide is a major cause of air pollution and is caused by burning fuel oil
Nitrous
Vanadium
Hydrogen
Sulfur
Sulfur
A vaporstat control is sensitive to____
Pressure
Temperature
Electricity
Infrared rays
Pressure
Scale deposit in an HRT boiler can cause
A high rate of heat transfer
Overheating of the boiler metal
Carryover
Purging
Overheating of the boiler metal
An economizer heats
Steam
Air for combustion
Fuel oil
Feedwater
Feedwater
The scanner must be installed on the front of the boiler to sight
Both the pilot and the main flame
The pilot only
The main flame only
The boiler eater level
Both the pilot and the main flame
Viscosity is the internal resistance of a fluid to flow. No. 6 fuel oil has_____viscosity
No
A high
A medium
A low
A high
The orsat analyzer is used to determine the____
Requiere chimney temperature
Combustion efficiency
Steam quality in the boiler
Heating value of the fuel
Combustion efficiency
In a closed feedwater heater the steam and water
Come into intimate contact
Only mix in the discharge side
Do not mix
Do not mix
Boiler feedwater is chemically treated to
Increase circulation
Increases oxygen concentration
Prevent formation of scale
Prevent formation of scale
The induce draft fan is located between the _______and ______
Feedwater pump heater
First pass heater
Boiler economizer
Boiler chimney
Boiler chimney
Soot on the outside of the boiler tubes is removed bu a
Steam turbine
Water turbine
Soot blower
Wire brush and vacuum cleaner
Soot blower
The BTU content of natural gas is______Btu per_____
100,000/ therm
100,000/cubit foot
152,000/ therm
152,000/cubit foot
100,000/therm
The underfeed stoker in steam plants uses
Natural draft
Ash to keep the grates cool
An ignition arch
Forced draft
Forced draft
