3e151 B Set Vol 1

100 Questions | Total Attempts: 839

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CDCs Quizzes & Trivia

UREs for B set of 3E151 cdcs Vol 1.


Questions and Answers
  • 1. 
    Which of the following is a fuel that is refined from lighter hydrocarbons?
    • A. 

      Lubrication oil

    • B. 

      Liguefied petroleum gases (LPG)

    • C. 

      Petroleum coke

    • D. 

      Asphalt

  • 2. 
    What characteristic of fuel oil indicates the minimum temperature at which the oil can be pumped and is useful in the handling of heavy oils?
    • A. 

      Flash point

    • B. 

      Pour point

    • C. 

      Viscosity

    • D. 

      Specific gravity

  • 3. 
    What characteristic of fuel oil can cause plug burners and screens and erratic combustion such as sparkling and flashback?
    • A. 

      Low viscosity

    • B. 

      High viscosity

    • C. 

      Sulfur content

    • D. 

      Water and sediment

  • 4. 
    What item is installed on a single-stage pump when used on a two-pipe fuel line system?
    • A. 

      Bleed slot

    • B. 

      Bypass port

    • C. 

      Needle valve

    • D. 

      Prime port

  • 5. 
    How far from the bottom of the fuel tanks should the suction line end?
    • A. 

      2 to 3 inches

    • B. 

      3 to 4 inches

    • C. 

      4 to 5 inches

    • D. 

      5 to 6 inches

  • 6. 
    When there is a long underground run of the suction line, where would a check valve be installed into the line?
    • A. 

      Next to the burner

    • B. 

      Next to the pump

    • C. 

      Where it enter the building

    • D. 

      Where it leaves the tank

  • 7. 
    When a return line rises from the burner, it is well advise to provide a check valve
    • A. 

      On the return line as it leaves the building

    • B. 

      On the supply line next to the burner

    • C. 

      Close to the tank inlet

    • D. 

      Close to the pump discharge

  • 8. 
    Oil strainers should be cleaned at regular intervals with steam, hot water, solvent, or
    • A. 

      Gasoline

    • B. 

      Compressed air

    • C. 

      Gasoline and hot water

    • D. 

      Water and soap solution

  • 9. 
    What is the average heating value of natural gas per cubic feet?
    • A. 

      500 btus

    • B. 

      1000 btus

    • C. 

      1500 btus

    • D. 

      2000 btus

  • 10. 
    At ordinary atmospheric pressure, with the necessary heat of vaporization added, butane boils or changes from a liquid to a gaseous state at
    • A. 

      -42*F

    • B. 

      -32*F

    • C. 

      0*F

    • D. 

      32*F

  • 11. 
    In low pressure systems, gas is usually distributed at pressures from
    • A. 

      0 to 5 ounces psi

    • B. 

      3 to 8 ounces psi

    • C. 

      1 1/2 psi to 25 psi

    • D. 

      25 to 50 psi

  • 12. 
    A gas service line should be installed at least how many inches below the ground surface?
    • A. 

      10 inches

    • B. 

      14 inches

    • C. 

      18 inches

    • D. 

      24 inches

  • 13. 
    To measure the amount of fuel oil in a storage tank by hand, you must first know the
    • A. 

      Diameter of the tank

    • B. 

      Length of the tank

    • C. 

      Height of the tank

    • D. 

      Capacity of the tank

  • 14. 
    If you are repairing an 80ft long gas line on the ceiling in a mechanical room, you should use at least
    • A. 

      5 to 7 hangers

    • B. 

      8 to 10 hangers

    • C. 

      12 to 15 hangers

    • D. 

      16 to 18 hangers

  • 15. 
    Which measures is being used to control static electricity, hwere the static charges which builds up within a object will be carried off harmlessly, neutralizing the difference in electrical potential?
    • A. 

      Bonding

    • B. 

      Grounding

    • C. 

      Humidification

    • D. 

      Vaporization

  • 16. 
    Conductive greases and V-belts on a shaft pulleys are examples of effective
    • A. 

      Bonding

    • B. 

      Grounding

    • C. 

      Testing for static electrical potentials

    • D. 

      Eliminating all electrical hazards

  • 17. 
    How soon must a reportable spill be reported?
    • A. 

      Within 12 hours

    • B. 

      Within 24 hours

    • C. 

      Within 36 hours

    • D. 

      Within 48 hours

  • 18. 
    What limits the maximum firing rate on a gas burner?
    • A. 

      Flashback

    • B. 

      Primary air

    • C. 

      Secondary air

    • D. 

      Flame blow-off

  • 19. 
    What is dependent upon burner and combustion chamber design?
    • A. 

      Amount of main air

    • B. 

      Amount of firing air

    • C. 

      Flame shape

    • D. 

      Turndown adjustment

  • 20. 
    What type of gas burner delivers the gas into the combustion chamber from the side(s) resulting in a horizontal flame?
    • A. 

      Inshot burner

    • B. 

      Upshot burner

    • C. 

      Downshot burner

    • D. 

      Overshot burner

  • 21. 
    What type of pilot is automatically turned on each time there is a call for heat and automatically cuts off at the end of the main burner flame-establishing period?
    • A. 

      Continuous pilot

    • B. 

      Standing pilot

    • C. 

      Interrupted pilot

    • D. 

      Intermittent pilot

  • 22. 
    Port type burners are classified as
    • A. 

      Small port, large port, or tile port burners

    • B. 

      Premixing port, small port, or large port burners

    • C. 

      Single prot, double port, or tile port burners

    • D. 

      Premixing port, single port, or double port burners

  • 23. 
    What type of port as burner is limited to low temperature applications due to physical structure?
    • A. 

      Single port

    • B. 

      Small port

    • C. 

      Large port

    • D. 

      Tile port

  • 24. 
    For proportional air inspiration at high mixture pressures, what limits the range of worktable spud orifice diameters?
    • A. 

      Amount of primary air

    • B. 

      Amount of secondary air

    • C. 

      Size of the venturi throat

    • D. 

      Length of the venturi throat

  • 25. 
    What valve is used in a gas valve train to shut off the gas when you are repairing or replaceing other components?
    • A. 

      Safety shutoff

    • B. 

      Pressure regulator

    • C. 

      Fire control

    • D. 

      Manual shutoff

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