Boiler Operator 3rd-test 1-2 Blue Book

50 Questions | Total Attempts: 2963

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Blue Book Quizzes & Trivia

Boilers are redundantly safe due to the safety controls in it and most accidents are due to human error. Just how ready are you to tackle the upcoming exam on boilers? Take up the Boiler Operator 3rd-test from 1-2 of the Blue Book and refresh your memory on what we covered. All the best!


Questions and Answers
  • 1. 
    • A. 

      Forced Draft, turbulence, and heat

    • B. 

      Fuel oil, air, time, and mixture

    • C. 

      Time, temperature, mixture, and atomization

    • D. 

      Time, temperature, and draft

  • 2. 
    If the steam pressure gauge indicates 200 psig, the absolute pressure is ____ psia.
    • A. 

      14.7

    • B. 

      185.3

    • C. 

      214.7

    • D. 

      228.7

  • 3. 
    A boiler is operating at 400 psi, and the safety valve opens at 410 psi and closes at 398 psi.  The blowdown is ____ psi.
    • A. 

      10

    • B. 

      12

    • C. 

      12.5

    • D. 

      14.7

  • 4. 
    An oil cooler is commonly used with a(n) ____ when operating in conjunction with a turbo-generator.
    • A. 

      Steam turbine

    • B. 

      Reciprocating steam engine

    • C. 

      Feedwater heater

    • D. 

      Air compressor

  • 5. 
    • A. 

      Supersaturated

    • B. 

      Desuperheated

    • C. 

      Superheated

    • D. 

      Saturated

  • 6. 
    The economizer on a boiler is used to ____.
    • A. 

      Heat air for combustion

    • B. 

      Increase steam temperature

    • C. 

      Add heat to feedwater

    • D. 

      Keep tubes clean

  • 7. 
    Soot blowers are normally used with ____ boilers.
    • A. 

      Scotch marine

    • B. 

      Cast iron

    • C. 

      Firetube

    • D. 

      Watertube

  • 8. 
    Overheating of tubes on a boiler can be caused by ____.
    • A. 

      Rapid circulation of water

    • B. 

      Scale on tubes

    • C. 

      A high water level

    • D. 

      A low firing rate

  • 9. 
    Carbon dioxide in a condensate return system causes ____.
    • A. 

      Scale

    • B. 

      Pitting

    • C. 

      Channeling

    • D. 

      Plugging of lines

  • 10. 
    A ____ pump is a positive displacement pump.
    • A. 

      Centrifugal

    • B. 

      Recriprocating

    • C. 

      Jet

    • D. 

      Vacuum

  • 11. 
    A boiler generating 6,000 lb of steam/hr produces ____ Btu/hr.
    • A. 

      6,000

    • B. 

      60,000

    • C. 

      600,000

    • D. 

      6,000,000

  • 12. 
    A bottom blowdown is performed on a boiler to ____.
    • A. 

      Remove surface scum

    • B. 

      Test for water level

    • C. 

      Test safety valves

    • D. 

      Discharge sludge and sediment

  • 13. 
    Water columns are connected to the boiler with a minumum of ____ " pipe.
    • A. 

      3/4

    • B. 

      1

    • C. 

      1 1/4

    • D. 

      1 1/2

  • 14. 
    The minumum size of a water column blowdown valve is ____ ".
    • A. 

      1/2

    • B. 

      3/4

    • C. 

      1

    • D. 

      1 1/4

  • 15. 
    The maximum size bottom blowdown valves on boilers is ____ ".
    • A. 

      1

    • B. 

      1 1/2

    • C. 

      2

    • D. 

      2 1/2

  • 16. 
    A ____ allows condensate to pass through, but stops steam.
    • A. 

      Steam trap

    • B. 

      Siphon

    • C. 

      Check valve

    • D. 

      Bypass

  • 17. 
    When taking over a shift, the first thing to do is check the ____.
    • A. 

      Water level in each boiler

    • B. 

      Fuel supply

    • C. 

      Flame condition

    • D. 

      Feedwater pumps

  • 18. 
    According to the ASME code, a high-pressure boiler having more than 500 sq ft of heating surface shall have ____.
    • A. 

      One safety valve of the proper size

    • B. 

      One safety valve with a rupture disc

    • C. 

      Two lever type safety valves

    • D. 

      Two or more safety valves

  • 19. 
    The probable cause of an increase in the temperature of gases of combustion at the boiler outlet is ____.
    • A. 

      The burner is on low fire

    • B. 

      The steam pressure is too low

    • C. 

      Dirty heating surfaces

    • D. 

      High combustion efficiency

  • 20. 
    Boilers in battery equipped with ____ must have two main steam stop valves and a free-blowing drain between them.
    • A. 

      Common blowdown lines

    • B. 

      Manhole openings

    • C. 

      Handhole openings

    • D. 

      Continuous blowdown lines

  • 21. 
    • A. 

      Shut the valve to the steam side of the gauge glass

    • B. 

      Shut the valve to the water side of the gauge glass

    • C. 

      Blow down the gauge glass

    • D. 

      Blow down the water column

  • 22. 
    • A. 

      At the NOWL

    • B. 

      In the mud drum

    • C. 

      In the flash tank

    • D. 

      In the steam and water drum well below the NOWL

  • 23. 
    A temperature reading of 80*C is equal to ____ *F.
    • A. 

      52

    • B. 

      148

    • C. 

      168

    • D. 

      176

  • 24. 
    A chimney temperature of 250*F above steam temperature indicates ____.
    • A. 

      Superheated steam

    • B. 

      Poor efficiency

    • C. 

      Saturated steam

    • D. 

      Normal operation

  • 25. 
     A manometer is read in ____.
    • A. 

      Inches of water

    • B. 

      Psig

    • C. 

      Psia

    • D. 

      None of the above

  • 26. 
    The boiling point of water will ____ with an increase in pressure.
    • A. 

      Not change

    • B. 

      Be raised

    • C. 

      Be lowered

    • D. 

      Raise until 212 *F

  • 27. 
    If a lather is not obtained when performing a soap hardness test, the water sample is ____.
    • A. 

      Alkaline

    • B. 

      Normal

    • C. 

      Soft

    • D. 

      Hard

  • 28. 
    Combustion efficiency can be increased when air is ____.
    • A. 

      Filtered

    • B. 

      Mixed with CO2

    • C. 

      Preheated

    • D. 

      Dried

  • 29. 
    ____ draft is produced by a fan located between the boiler and the chimney.
    • A. 

      Induced

    • B. 

      Forced

    • C. 

      Forced-induced

    • D. 

      Natural forced

  • 30. 
    The overspeed trip on a steam turbine should be tested ____.
    • A. 

      Before putting the steam turbine on-line

    • B. 

      Daily

    • C. 

      Weekly

    • D. 

      Monthly

  • 31. 
    • A. 

      Incomplete combustion

    • B. 

      Carryover of oxygen

    • C. 

      Low combustion efficiency

    • D. 

      High combustion efficiency

  • 32. 
    The purpose of chemically treating feedwater is to ____.
    • A. 

      Prevent priming

    • B. 

      Turn scale forming salts to a nonadhering sludge

    • C. 

      Change scale forming salts to an adhering sludge

    • D. 

      Prevent water hammer

  • 33. 
    Water in a deaerating feedwater heater is prevented from entering the steam line by a(n) ____.
    • A. 

      Check valve

    • B. 

      Stop valve

    • C. 

      Loop seal or internal overflow

    • D. 

      Atmospheric relief

  • 34. 
    A steam turbine operating at 3600 RPM will trip at ____ RPM.
    • A. 

      3650

    • B. 

      3700

    • C. 

      3750

    • D. 

      3960

  • 35. 
    The steam line going to the soot blowers is connected to the main ____.
    • A. 

      Steam header

    • B. 

      Steam drum

    • C. 

      Auxiliary line

    • D. 

      Pressure reducing station

  • 36. 
    Before using soot blowers on a boiler, ____.
    • A. 

      Drain superheater lines

    • B. 

      Drain soot blower lines

    • C. 

      Secure all burners

    • D. 

      Decrease the draft

  • 37. 
    An accumulation of soot on the fire side of boiler tubes ____.
    • A. 

      Increases boiler efficiency

    • B. 

      Decreases boiler efficiency

    • C. 

      Decreases gas temperature

    • D. 

      Protects tubes from excessive heat

  • 38. 
    A globe valve installed in the feedwater line between the feedwater pump and boiler has pressure from the feedwater pump ____ the valve disc.
    • A. 

      Under

    • B. 

      On top of

    • C. 

      Under and on top of

    • D. 

      None of the above

  • 39. 
    The range of a pressure gauge should be twice the safety valve setting, but not less than ____ time(s) the safety valve setting.
    • A. 

      1

    • B. 

      1 1/4

    • C. 

      1 1/2

    • D. 

      1 3/4

  • 40. 
    Hard scale formed on the inside of tubes is best removed by ____.
    • A. 

      Washing down with water

    • B. 

      Air or water driven turbines

    • C. 

      Wire brushes

    • D. 

      Boiling chemical solution

  • 41. 
    To correct a low water condition, ____.
    • A. 

      Decrease feedwater

    • B. 

      Increase firing rate

    • C. 

      Lower firing rate and increase feedwater

    • D. 

      Secure fires

  • 42. 
    The superheater drain is used to ____.
    • A. 

      Remove gases from the superheater

    • B. 

      Remove condensate

    • C. 

      Relieve pressure

    • D. 

      Establish steam flow

  • 43. 
    A sudden rise in chimney temperature with no increase in load indicates ____.
    • A. 

      The damper is stuck closed

    • B. 

      The boiler needs cleaning

    • C. 

      There is a broken baffle

    • D. 

      There is too much air

  • 44. 
    The Btu content of natural gas is ____.
    • A. 

      100,000 Btu/therm

    • B. 

      100,000 Btu/cu ft

    • C. 

      152,000 Btu/therm

    • D. 

      152,000 Btu/cu ft

  • 45. 
    The safety valve setting on the steam and water drum is ____ the superheater safety valve.
    • A. 

      Lower than

    • B. 

      Higher than

    • C. 

      The same as

    • D. 

      None of the above

  • 46. 
    The Btu content of No. 6 fuel oil is approximately ____.
    • A. 

      18,750 Btu/gal

    • B. 

      18,750 Btu/lb

    • C. 

      18,750 Btu/barrel

    • D. 

      150,000 Btu/lb

  • 47. 
    Chemicals can be added to a boiler by a ____ pump.
    • A. 

      Feedwater

    • B. 

      Vacuum

    • C. 

      Proportioning

    • D. 

      Turbine

  • 48. 
    The feedwater stop valve is found between the ____.
    • A. 

      Boiler and check valve

    • B. 

      Check valve and feedwater pump

    • C. 

      Boiler and feedwater pump

    • D. 

      Boiler and main steam header

  • 49. 
    Sensible heat is ____.
    • A. 

      Heat that can be measured with a thermometer

    • B. 

      970.3 Btu

    • C. 

      Heat that cannot be measured

    • D. 

      Heat that changes a substance's state but not its temperature

  • 50. 
    Balanced draft is ____.
    • A. 

      Forced draft

    • B. 

      Induced draft

    • C. 

      Below atmospheric pressure at the flue outlet

    • D. 

      Constant furnace pressure slightly below atmospheric pressure