Boiler Operator 3rd-test 1-2 Blue Book

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Boiler Operator 3rd class test 1-2 Blue Book

  
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  • 1. 
    ____ are necessary for complete combustion.
    • 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 boiler is producing 40,000 lb of steam/hr at a pressure of 100 psi and a steam temperature of 500*F.  The steam produced is ____ steam.
    • 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. 
    In order to be sure the gauge glass is indicating an accurate water level reading, the stationary engineer should ____.
    • 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 continuous blowdown line is located ____.
    • 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 high CO2 reading in the gases of combustion is a sign of ____.
    • 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


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