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
The boiler superheater rises the temperature of the
Feedwater
Gases of combustion
Air for combustion
Steam leaving the boiler
Steam leaving the boiler
An evaporation test should be perform______to check the low water fuel cutoff control
Daily
Weekly
Monthly
Yearly
Monthly
______and______are used to soften feedwater
Calcium chloride/soda ash
Lime/soda ash
Lime/hydrochloride acid
Lime/soda ash
Water polluted with foreign
matter causes an increase in
Makeup
Blowdown
Fuel consumption
Surface tension
Surface tension
A ringelmann test is used to
Analyze feedwater
Measure CO2 in flue gas
Measure CO in flue gas
Determine smoke density
Determine smoke density
Boiler horses power is the evaporation of______lb of water/hr from and at a feedwater temperature of 212 F
34.5
180
343
970.3
34.5
According to the ASME code when warming up a boiler during cold plant startup, the boiler vent should remain open until the steam pressure reaches approximately ______psi
3
8
13
25
25 psi
A pop-type safety valve is a____type
Hand and lever
Pin and disc
Deadweight
Spring-loaded
Spring-loaded
An open feedwater heater is located_____.
Above the feedwater pump on the discharge side
Above the feedwater pumpon the suction side
In the boiler room
Between the feedwater pump and the boiler
Above the feedwater pump on the suction side
When economizers are used to heat boiler feedwater every 10% rise in feedwater temperature is accompanied by a______% savings in fuel
.24%
1%
5%
10%
1%
A proximate analysis of coal is used to determine the______
Volume of volatile matter fixed carbon, moisture and ash
Volume of carbon, hydrogen, oxygen and sulfur
Weight of moisture, oxygen sulfur, and ash
Weight of moisture, oxygen, sulfure, and ash
Weight of moisture, fixed carbon, volatile matter, and ash
According to the ASME code, a boiler that has more than_____sq ft of beating surface must have two or more safety valves.
100
300
500
700
500
The purpose of the scanner is to prove_______.
Only the pilot
Only the main flame
Both the pilot and the main flame
The proper boiler water level
Both the pilot and the main flame
