Boiler Operator 3rd-test 3-4 Blue Book
Boiler operators are responsible for maintaining heating systems in large buildings in the boiler, engine, and mechanical rooms. The Boiler Operator 3rd-test below covers 3-4 blue book is designed to help you understand your class work more and prepare you for the upcoming exam. Give it a shot!
- 1.A flame rod ____.
- A.
Regulates steam flow
- B.
Ignites the fuel oil
- C.
Ensures that the gas pilot is lighted
- D.
Measures heat in the boiler
- 2.There are approximately ____ Btu in 1 cu ft of natural gas.
- A.
100
- B.
1000
- C.
3000
- D.
5000
- 3.The ph of boiler water may be controlled by using ____.
- A.
Sulphite
- B.
Sulphate
- C.
Caustic soda
- D.
Softened feedwater
- 4.Boiler water with a ph of 11 is ____.
- A.
Alkaline
- B.
Acidic
- C.
Neutral
- D.
Hard
- 5.A scotch marine boiler is easily identified because it ____.
- A.
Has a brick setting
- B.
Has a cylindrical internal furnace
- C.
Is externally fired
- D.
Has waterwalls
- 6.The air flow switch at the burner fan housing ____.
- A.
Ensures the primary air fan is functioning
- B.
Controls the secondary air damper
- C.
Controls the boiler operating range
- D.
Controls the boiler water temperature
- 7.The ASME code recommends that low water fuel cutoffs be tested by an evaporation test ____.
- A.
Daily
- B.
Weekly
- C.
Monthly
- D.
Yearly
- 8.A neutral solution is ____ on the ph scale.
- A.
0
- B.
3.5
- C.
7
- D.
14
- 9.A dry pipe separator ____.
- A.
Delivers higher quality steam to the header
- B.
Distributes feedwater the length of the drum
- C.
Prevents water hammer
- D.
Agitates the water in the steam and water drum
- 10.Draft is carefully controlled to ____.
- A.
Maintain at least 15% CO in gases of combustion
- B.
Completely burn fuel supplied to the burner
- C.
Prevent the boiler from overheating
- D.
Maintain high levels of excess air in gases of combustion
- 11.Draft is measured with a ____.
- A.
Pyrometer
- B.
Hydrometer
- C.
Manometer
- D.
Potentiometer
- 12.A ringleman test is used to determine ____.
- A.
CO2 in gases of combustion
- B.
Smoke density
- C.
Flame failure
- D.
Steam quality
- 13.A flame scanner proves (verifies) ____.
- A.
Beta rays
- B.
Heat
- C.
Pilot and main flame
- D.
X rays
- 14.According to the ASME code, when warming up a boiler the air cock is closed when ____.
- A.
Steam starts to come out of the boiler
- B.
The steam pressure gauge reads 25 psi
- C.
The steam pressure gauge reads 35 psi
- D.
The boiler goes on-line
- 15.A motor rated at 25 HP delivering 20 HP is operating at ____ % capacity.
- A.
75
- B.
80
- C.
85
- D.
90
- 16.A deposit of scale or mud in an HRT boiler could cause ____.
- A.
A bag to develop
- B.
A draft loss
- C.
Overheating of the breeching
- D.
Lowering of the chimney temperature
- 17.Waterwall tubes protect the refractory and ____.
- A.
Increase boiler heating surface
- B.
Act as stays for tube sheets
- C.
Allow the operator to blow down while steaming
- D.
Help control water circulation
- 18.Steam at 250 psia and 400*F is considered ____.
- A.
Supersaturated
- B.
Saturated
- C.
Superheated
- D.
Steam temperature cannot exceed 212*F
- 19.Sensible heat is heat that ____.
- A.
Changes a substance's state but not its temperature
- B.
Changes a substances's temperature and its state
- C.
Changes a substance's temperature but not its state
- D.
Is 970.3 Btu/lb of steam
- 20.Extra heavy pipe must be used on blowdown lines when the steam pressure exceeds ____ psi.
- A.
15
- B.
100
- C.
125
- D.
200
- 21.To check the water level on a boiler on-line, it is best to ____.
- A.
Give the boiler a bottom blowdown
- B.
Blow down the gauge glass
- C.
Lower the steam pressure
- D.
Check the log sheet
- 22.A steam pressure gauge has a siphon between the boiler and the pressure gauge to ____.
- A.
Allow for expansion and contraction
- B.
Prevent water from entering the pressure gauge
- C.
Protect the pressure gauge from high steam pressure
- D.
Prevent steam from entering the pressure gauge
- 23.If a boilere evaporates 50,000 lb of steam/hr and is evaporating 10 lb of steam/sq ft of heating surface, the heating surface of the boiler is ____ sq ft.
- A.
50
- B.
500
- C.
5,000
- D.
50,000
- 24.Oxygen in feedwater causes ____.
- A.
Priming
- B.
Foaming
- C.
Pitting
- D.
Scale
- 25.It is permissible to have one blowdown valve on a boiler operated under ____ psi.
- A.
100
- B.
125
- C.
150
- D.
200
Questions: 49 | Attempts: 6415 | Last updated: Jul 11, 2022
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Sample QuestionThe steam space of a boiler must be large enough to?
Questions: 45 | Attempts: 5883 | Last updated: Mar 22, 2022
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Sample QuestionDeaerator feedwater is to prevent
Questions: 48 | Attempts: 5438 | Last updated: Mar 22, 2022
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Sample QuestionWater begins to boil at approximately ______ degrees F.
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