Stationary Engineer Class 3 Examination

196 Questions | Total Attempts: 5536

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Stationary Engineer Class 3 Examination

A compendium of questions that should help with any licensing exam.


Questions and Answers
  • 1. 
    1. Scale accumulation on the waterside of a firetube boiler can lead to possible blank and loosining of the tube.
    • A. 

      Blistering

    • B. 

      Spalling

    • C. 

      Overheating

    • D. 

      Efficiency loss

  • 2. 
    1. A stay that is shorter than 8” and threaded is required to have a blank
    • A. 

      Tell tale hole

    • B. 

      Stay brace

    • C. 

      Riveted connection

    • D. 

      Bolt brace

  • 3. 
    1. All boiler heating surfaces are measured on the side blank the heat.
    • A. 

      Convecting

    • B. 

      Radiating

    • C. 

      Giving

    • D. 

      Receiving

  • 4. 
    1. The ratio of the maximum fuel input rate and the minimum fuel input rate is known as the blank.
    • A. 

      Combustion ratio

    • B. 

      Turn down ration

    • C. 

      Rate of ideal fuel

    • D. 

      Blowback

  • 5. 
    1. A disavantage of a HRT boiler is that scale or mud deposits on the bottom of the shell, it will rapidly blank and produce blank or blank.
    • A. 

      Condense, bags, blisters

    • B. 

      Overheat, bags, blisters

    • C. 

      Overheat, bags, bulges

    • D. 

      Condense, blister, bulges

  • 6. 
    1. The minimum size of the blowdown line is blank inch, and the maximum size is blank  inches.
    • A. 

      3/4", 2"

    • B. 

      1 1/2", 2"

    • C. 

      3/4", 2 1/2"

    • D. 

      3/8", 1 1/2"

  • 7. 
    1. The hot gases from the furnace pass into a blank lined combustion chamber on a dry back scotch marine boiler.
    • A. 

      Refractory

    • B. 

      Insulation

    • C. 

      Creosote

    • D. 

      Concrete

  • 8. 
    1. The number of tubes in each of the four passes is ____________ to maintain constant ______________ and ________ _______________.
    • A. 

      Increased, velocity, heat, transfer

    • B. 

      Reduced, velocity, heat, transfer

    • C. 

      Reduced, density, heat, exchange

    • D. 

      Reduced, velocity, heat, exchange

  • 9. 
    1. The early watertube boilers followed some fire tube designs,being straight tubes suspended over a furnace with the tubes rolled in two types of headers (1)____________or (2) ______________ ______________.
    • A. 

      Box header, sinous header

    • B. 

      Barrel header, tube header

    • C. 

      Box header, tube header

    • D. 

      Sinous header, tube header

  • 10. 
    Bent tubes are more __________ than straight tubes.
    • A. 

      Reliable

    • B. 

      Structurally sound

    • C. 

      Efficient

    • D. 

      Flexible

  • 11. 
    1. Today, most packaged watertube boilers follow one of the three designs. These are known as ___, ____, and ____ types.
    • A. 

      A,D,&O

    • B. 

      A,D, and Sterling

    • C. 

      A,B,and C

    • D. 

      B,C, and O

  • 12. 
    1. Flow of liquid in ad coil-type boiler is _______________ through the coils spiral-wound in a counterflow direction to the combustion gases.
    • A. 

      Upward

    • B. 

      Downward

    • C. 

      Inverted

    • D. 

      Transferred

  • 13. 
    1. ___________ deflect the hot gases back and forth between the tubes a number of times to enable greater heat absorption by the boiler tubes.
    • A. 

      Headers

    • B. 

      Stays

    • C. 

      Baffles

    • D. 

      Tube sheets

  • 14. 
    1. Welding a flat strip of metal between the waterwall tubes is known as ____________ wall construction.
    • A. 

      Tube

    • B. 

      Membrane

    • C. 

      Refractory

    • D. 

      Braced

  • 15. 
    1. The general classification of superheaters includes ___________ and _______________ types, depending on wheather they absorb radiant or convection heat.
    • A. 

      Radiant & Convection

    • B. 

      Convection & Conduction

    • C. 

      Radiant & conduction

    • D. 

      Saturated & convection

  • 16. 
    Sulfur in the soot then unites with moisture from condensation to produce a _____________ ________, which is extremely corrosive to all steel construction contacted between the economizer and the stack
    • A. 

      Caustic soda

    • B. 

      Carbonic acid

    • C. 

      Phosphorous Acid

    • D. 

      Sulfurous acid

  • 17. 
    1. _______ _______________ make the final heat recovery from the boiler flue gases with which they preheat the incoming furnace air for its combustion with fuel.
    • A. 

      Stack Scrubber

    • B. 

      Primary Supply

    • C. 

      Secondary Supply

    • D. 

      Air Preheater

  • 18. 
    1. The pipes connecting the water column to the boiler must be a minimum diameter of ____ inch.
    • A. 

      2"

    • B. 

      2.5"

    • C. 

      1"

    • D. 

      3/4"

  • 19. 
    1. The two types of electric boilers are _______________ and ______________.
    • A. 

      Resistance & electrode

    • B. 

      Resistance & capacitance

    • C. 

      Arc Tube & electrode

    • D. 

      Electrode & capacitance

  • 20. 
    1. There is no _____________ _________ ____ _________________ above the critical pressure, because water and steam have the same density.
    • A. 

      Specific Heat of Atomization

    • B. 

      Latent Heat of vaporization

    • C. 

      Specific heat of vaporization

    • D. 

      Latent heat of atomization

  • 21. 
    1. ______ ________________ are used extensively in pulverized-fuel-burning plants in order to keep heat-absorbing surfaces free from soot and ash buildup.
    • A. 

      Soot Blowers

    • B. 

      Stack Scrubbers

    • C. 

      Chain Grate Stokers

    • D. 

      Tube puncher

  • 22. 
    1. According to ASME code a HTHW boiler is any boiler that operates above ____________ or ____________.
    • A. 

      150PSI, 200 Deg. F

    • B. 

      150 PSI, 100 Deg. C

    • C. 

      160PSI, 250Deg.F

    • D. 

      14.7 PSI, 212 Deg. F

  • 23. 
    1. The waste products from a sugar cane are used in a _______________ plant.
    • A. 

      Bagasse

    • B. 

      Black liquor

    • C. 

      Red liquor

    • D. 

      Saccarine refinery

  • 24. 
    1. Cogeneration plants sell ____________ to the local industrial plants, and _____________ to the local __________.
    • A. 

      Fuel oil, steam, power plants

    • B. 

      Steam, condensate, cogeners

    • C. 

      Propane, fuel oil, utilities

    • D. 

      Steam, electricity, utilities

  • 25. 
    1. The operation of a black liquor boiler is known for its __________ generation, and heat recovery of _______ _______.
    • A. 

      Steam, sulpfuric acid

    • B. 

      Power, waste heat

    • C. 

      Lignin, soda ash

    • D. 

      Steam, soda ash

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