Chapter 5

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  1. If the adjusting ring on a safety valve is screwed downwards, the blowdown will be ____ because the ring increases the area of the ports.
    A.  Constant
    B.  Longer
    C.  The same
    D.  Shorter
    D.  Shorter
    (this multiple choice question has been scrambled)
  2. Safety valves
    1. Prevent loss of production in a plant
    2. Prevent bursting of the boiler drum
    3. Release steam to the atmosphere
    4. Are not required on boilers
    A. 2, 3
    B. 3, 4
    C. 1, 2
    D. 1, 3
    E. 1, 2, 3, 4,
    A. 2, 3
    (this multiple choice question has been scrambled)
  3. To increase the popping pressure of a safety valve:
    A. The adjusting ring is screwed upward
    B. the spring is replaced
    C. The adjusting ring is screwed downward
    D. The adjusting screw is moved downward
    E. The adjusting screw is moved upward
    C. The adjusting ring is screwed downward
    (this multiple choice question has been scrambled)
  4. To increase the blow down of a safety valve:
    1. Increase the spring tension
    2. Increase the port openings
    3. Screw the adjusting ring upwards
    4. Decrease the port opening
    A. 1, 3
    B. 2, 3
    C. 2, 4
    D. 3, 4
    E. 1, 2
    D. 3, 4
    (this multiple choice question has been scrambled)
  5. The popping pressure of a safety valve must be:
    A. Higher on the main steam drum than on the superheater
    B. the same on the main steam drum as on the superheater
    C. Lower on the main steam drum than the superheater
    D. Lower on the economizer than the main steam drum
    E. Higher on the main steam drum than the air preheater
    A. Higher on the main steam drum than on the superheater
    (this multiple choice question has been scrambled)
  6. The purpose of the lip or feather on a safety valve seat:
    1. Increases the force of steam acting on the seat
    2. Allows the valve to pop open
    3. Allows simpler construction of the valve
    4. Makes no difference in operation
    A. 3, 4
    B. 1, 2, 3, 4
    C. 1, 2
    D. 1, 2, 3
    E. 2, 3
    C. 1, 2
    (this multiple choice question has been scrambled)
  7. Safety valves:
    1. Shall be attached as close as possible to the boiler drum
    2. Shall be attached in an upright position with the spindle vertical
    3. Shall have a discharge line attached
    4. Shall have no valve placed between the boiler and the safety valve
    A. 1, 3, 4
    B. 1, 2, 3
    C. 2, 3, 4
    D. 1, 2, 4
    E. 1, 2, 3, 4
    D. 1, 2, 4
    (this multiple choice question has been scrambled)
  8. A safety valve:
    1. Which discharges shall be located or piped clear of platforms or running boards
    2. Must have a gravity drain installed in the discharge line where condensate may collect
    3. Shall have an open gravity drain in the valve casing below the seat
    4. Has no discharge pipes in some cases
    A. 1, 2, 3, 4
    B. 1, 3, 4
    C. 1, 2, 3
    D. 2, 3, 4
    E. 1, 2, 4
    A. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  9. The dial of the gauge must be graduated to at least ____ times the pressure at which the boiler safety valve is set.
    (A) 1.5 times
    (B) 3 times
    (C) 1.25 times
    (D) 2 times
    (A) 1.5 times
    (this multiple choice question has been scrambled)
  10. Safety valves should be opened manually to:
    A. Test the low water fuel cut off
    B. Remove sludge
    C. Release internal pressure
    D. Lower boiler water level
    E. Test the operation of the valve
    E. Test the operation of the valve
    (this multiple choice question has been scrambled)
  11. Every boiler must be fitted with at least one pressure gauge:
    A. To indicate the pressure in the steam header
    B. To indicate the pressure in the boiler
    C. To indicate that it is on or off line
    D. To indicate the steam flow from the boiler
    E. to indicate the water level in the boiler
    B. To indicate the pressure in the boiler
    (this multiple choice question has been scrambled)
  12. All steam boilers shall have at least one gauge glass, and boilers operating above ____ shall have two water gauge glasses.
    (A) 3000Kpa???
    (B) 2750Kpa
    (C) 275Kpa
    (D) 1000Kpa
    (E) 6200Kpa
    (A) 3000Kpa???
    (this multiple choice question has been scrambled)
  13. The main cause of a steam boiler failure is overheating of the heating surfaces due to ____ conditions.
    (A) Hot Combustion Gas
    (B) High Water
    (C) Low Water
    (D) Low Steam
    (C) Low Water
    (this multiple choice question has been scrambled)
  14. A water gauge glass:
    1. Indicates how much steam is in the boiler
    2. May be connected directly to a boiler
    3. Must have a water column connected to the boiler first
    4. Indicates how much water is in the boiler
    A. 2, 4
    B. 1, 2, 4
    C. 1, 2
    D. 1, 3, 4
    E. 2, 3, 4
    A. 2, 4
    (this multiple choice question has been scrambled)
  15. During the operation of a boiler, it is extremely important to maintain the correct water level:
    1. To prevent the gas burner from fluctuating
    2. To prevent water carry over
    3. To prevent hot spots
    4. To protect the alternator
    A. 1, 2, 3
    B. 2, 3
    C. 1, 2
    D. 1, 2, 3, 4
    E. 1, 4
    B. 2, 3
    (this multiple choice question has been scrambled)
  16. The water column:
    1. Acts as a reservoir
    2. Dampens the agitation
    3. Tends to trap any sludge or sediment
    4. Provides a place for the installation of alarm floats
    A. 1, 3, 4
    B. 1, 2, 3
    C. 2, 3, 4
    D. 1, 2, 3, 4
    E. 1, 2, 4
    D. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  17. Flat glass gauges:
    1. Are used for pressures above 2750 kPa
    2. Are used on water tube boilers only because they are cooler
    3. Consist of two glass plates, which are bolted to a steel forged housing
    4. Are lined with thin sheets of mica
    A. 1, 2, 3, 4
    B. 1, 3, 4
    C. 2, 3, 4
    D. 1, 2, 3
    E. 1, 2, 4
    B. 1, 3, 4
    (this multiple choice question has been scrambled)
  18. Water gauge glasses have:
    1. Quick closing type valves in the steam and waterside
    2. Valves with convenient handles, that could be remotely operated if needed
    3. Drain valves, which are slow opening
    4. No drain valves
    A. 1, 2, 3
    B. 1, 2, 4
    C. 2, 3, 4
    D. 1, 2, 3, 4
    E. 1, 3, 4
    A. 1, 2, 3
    (this multiple choice question has been scrambled)
  19. When repairing a gauge glass:
    1. The boiler gauge glass should not be under pressure
    2. The steam and water connections should be closed and the drain valve should be open
    3. The operator should wear a face shield before pressuring up the glass
    4. The steam and water connection should be blown out before installing the new glass
    A. 2, 3, 4
    B. 1, 2, 3, 4
    C. 1, 3, 4
    D. 1, 2, 4
    E. 1, 2, 3
    B. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  20. Low-water fuel cut-offs:
    A. Cannot be automatically reset
    B. May have a float or electrode chamber
    C. Cannot be adversely effected by heat
    D. Do not act as an interlock device
    E. not required on automatically fired steam boilers
    B. May have a float or electrode chamber
    (this multiple choice question has been scrambled)
  21. A boiler explosion due to overheating of the heating surfaces may result from:
    A. A faulty low gas pressure switch
    B. Improper furnace purge
    C. A low-water cut-off malfunction
    D. Combustion air switch failure
    E. A faulty flame scanner
    C. A low-water cut-off malfunction
    (this multiple choice question has been scrambled)
  22. Low water level fuel cut-offs:
    1. Are required when a boiler is not under continuous attendance by a certified operator
    2. Are required on fire tube boilers only
    3. Must be installed so that they cannot be rendered inoperative
    4. Must be tested under operating conditions
    A. 1, 2, 3
    B. 2, 3, 4
    C. 1, 2, 3, 4
    D. 1, 3, 4
    E. 1, 2, 4
    D. 1, 3, 4
    (this multiple choice question has been scrambled)
  23. A low water level fuel cut-off device:
    1. Shuts the fuel off to the boiler when the air flow drops
    2. Shuts the fuel off when the burner pressure is low
    3. Protects the boiler from overheating
    4. Shuts the main fuel valve during a low water condition
    A. 1, 2, 3
    B. 1, 2,
    C. 3, 4
    D. 2, 3
    E. 1, 2, 4
    C. 3, 4
    (this multiple choice question has been scrambled)
  24. The low water level fuel cut-off device:
    1. Should be blown down every shift
    2. Should be blown down once a week
    3. Has a drain valve installed at the bottom connection
    4. Is blown down to prevent sediment build up
    A. 1, 2, 3
    B. 2, 3, 4
    C. 1, 2, 3, 4
    D. 1, 2, 4
    E. 1, 3, 4
    E. 1, 3, 4
    (this multiple choice question has been scrambled)
  25. Which of the following do not require steam stop valves?
    1. Safety valve
    2. Main steam header
    3. Reheater
    4. Superheater
    A. 1, 3, 4
    B. 1, 2, 4
    C. 1, 2, 3
    D. 1, 2, 3, 4
    E. 2, 3, 4
    A. 1, 3, 4
    (this multiple choice question has been scrambled)
  26. Steam stop valves:
    1. Can be of the gate or globe type
    2. Can be high or are high pressure valves
    3. May have drain valves located on the lower part of the valve body
    4. Can be of flanged type construction
    A. 1, 2, 4
    B. 1, 2, 3, 4
    C. 1. 2
    D. 2, 3
    E. 2, 3, 4
    B. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  27. When two or more boilers are connected to a common main:
    1. It is recommended that each boiler be equipped with an automatic stop-and-check valve
    2. The automatic stop-and-check valve should be located closest to the boiler
    3. They should have stop valves located between the main and the automatic stop and check valve
    4. The space between the stop-and-check valve and the boiler stop valve shall be provided with an adequate drain
    A. 1, 2, 3
    B. 2, 3, 4
    C. 1, 3, 4
    D. 1, 2, 3, 4
    E. 1, 2, 4
    D. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  28. A non-return valve:
    1. Can be a globe type valve
    2. Can be an angle type valve
    3. Is the same as a stop-and-check valve
    4. Prevents a backflow of steam from the header to the boiler
    A. 1, 3, 4
    B. 1, 2, 3
    C. 1, 2, 4
    D. 1, 2, 3, 4
    E. 2, 3, 4
    D. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  29. A non-return valve:
    1. Can use a piston to cushion the valve upon opening
    2. Can use a spring to cushion the valve upon opening
    3. Does not need anything to cushion the valve upon opening
    4. Opens when the boiler pressure exceeds the main steam header pressure
    A. 1, 2
    B. 1, 2, 4
    C. 3, 4
    D. 2, 4
    E. 1, 4
    B. 1, 2, 4
    (this multiple choice question has been scrambled)
  30. The purpose of the non-return valve is:
    A. to prevent steam from entering the steam header
    B. To prevent water from entering the steam header
    C. To prevent the back flow of steam
    D. To prevent the safety valve from popping
    E. To drain water out of the main steam header
    C. To prevent the back flow of steam
    (this multiple choice question has been scrambled)
  31. The piping between the non-return valve and the stop valve has a drain valve:
    1. To help warm up the header
    2. To indicate if there is steam flowing from the boiler
    3. To indicate the pressure in the line
    4. To drain the condensate out of the header
    A. 1, 2
    B. 1, 4
    C. 1, 3
    D. 1, 2, 4
    E. 1, 2, 3, 4
    B. 1, 4
    (this multiple choice question has been scrambled)
  32. The blow-off connection to a boiler:
    1. Is made to the lowest point of the boiler
    2. Is used to drain the boiler
    3. Is used to blow out mud and sediment
    4. Is used to lower the concentration of dissolved impurities
    A. 1, 2, 4
    B. 1, 3, 4
    C. 2, 3, 4
    D. 1, 2, 3
    E. 1, 2, 3, 4
    E. 1, 2, 3, 4
    (this multiple choice question has been scrambled)
  33. The ASME code required that the blow off piping:
    1. Shall be painted to indicate a hot pipe
    2. Shall not be less than 25 mm and not greater than 64 mm in size
    3. Is exposed to direct furnace heat so it shall be protected by heat resistant material
    4. Shall be of flanged connections
    A. 1, 2, 3, 4
    B. 2, 3, 4
    C. 3, 4
    D. 2, 3
    E. 1, 2
    D. 2, 3
    (this multiple choice question has been scrambled)
  34. Every steam boiler having a working pressure exceeding 103 kPa:
    1. Shall be equipped with two approved blow-off valves
    2. Must have at least one slow-opening blow-off valve
    3. Must have two slow-opening blow-off valves
    4. Must have two quick-opening blow-off valves
    A. 1, 2, 4
    B. 1, 3
    C. 3, 4
    D. 1, 2
    E. 1, 4
    D. 1, 2
    (this multiple choice question has been scrambled)
  35. Steam boilers:
    1. Normally do not have blow-off valves
    2. Are normally equipped with one slow-opening and one quick-opening blow-off valve
    3. May be equipped with one slow-opening and one quick-opening blow-off valve
    4. Normally have two quick-opening blow-off valves
    A. 1, 2, 3
    B. 1, 3
    C. 3, 4
    D. 1, 2
    E. 2, 3
    E. 2, 3
    (this multiple choice question has been scrambled)
  36. When a boiler has a quick-opening and a slow-opening blow-off valve:
    1. The slow-opening valve is next to the boiler
    2. The quick-opening valve is next to the boiler
    3. It does not matter which one is next to the boiler
    4. It does matter which one is next to the boiler
    A. 1, 2, 3
    B. 1, 2, 4
    C. 3
    D. 2, 4
    E. 1, 4
    D. 2, 4
    (this multiple choice question has been scrambled)
  37. A slow-opening blow-off valve:
    1. Refers to the amount of time taken to open it
    2. Refers to the amount of time taken to close it
    3. Is one which requires at least five 360 degree turns to fully open or to fully close it
    4. Is located down stream of a quick-opening blow-off valve
    A. 1, 4
    B. 1, 3
    C. 3, 4
    D. 1, 3, 4
    E. 2, 3, 4
    C. 3, 4
    (this multiple choice question has been scrambled)
  38. A slow opening blow-off valve:
    1. Creates less water hammer than a quick-opening blow-off valve
    2. Creates more water hammer than a quick-opening blow-off valve
    3. Creates the same amount of water hammer as a quick-opening type
    4. Is opened after the quick-opening valve
    A. 3
    B. 4
    C. 1, 4
    D. 3, 4
    E. 2, 4
    C. 1, 4
    (this multiple choice question has been scrambled)
  39. Which of the following is the correct procedure, when blowing down a boiler with both a quick-opening and a slow-opening blow-off valve?
    A. Open the quick-opening valve, then open the slow-opening valve. After blowing down: close the slow-opening valve, then close the quick-opening valve
    B. It does not matter which valve is opened first. After blowing down, it does not matter which valve is closed first.
    C. Open the quick-opening valve, then open the slow-opening valve. After blowing down: close the quick opening valve, then close the slow-opening valve
    D. Open the slow-opening valve, then open the quick-opening valve. After blowing down: close the slow-opening valve, then close the quick-opening valve
    E. Open the slow-opening valve, then open the quick-opening valve. After blowing down: close the quick-opening valve, then close the slow-opening valve
    A. Open the quick-opening valve, then open the slow-opening valve. After blowing down: close the slow-opening valve, then close the quick-opening valve
    (this multiple choice question has been scrambled)
  40. The most commonly used type of blowdown valves are:
    1. Gate
    2. Globe
    3. Sliding disc
    4. Seatless sliding plunger
    5. Seat and disc
    6. Combination
    7. Butterfly
    (A) 3,4,5,6
    (B) 1,3,4,5,7
    (C) 1,2,3,4,5,6,7
    (D) 2,4,6,7
    (A) 3,4,5,6
    (this multiple choice question has been scrambled)
  41. All blow-off pipes, valves and fittings must be:
    1. Painted to prevent corrosion
    2. Of heavy construction corresponding to the boiler pressure
    3. Installed without sharp bends
    4. Able to expand and contract without being restricted
    (A) 1,3,4
    (B) 1,2,3,4
    (C) 1,2,3
    (D) 2,3,4
    (E) 1,2,4
    (D) 2,3,4
    (this multiple choice question has been scrambled)
  42. The purpose of the blow-off tank:
    1. Is to measure the amount of water being blown down from the boiler
    2. Is to prevent steam and hot water from going directly to the sewer
    3. Is to reduce the pressure and the temperature of the water entering the sewer
    4. Is to prevent damage to the sewer system
    A. 2, 3, 4
    B. 1, 2, 3, 4
    C. 1, 3, 4
    D. 1, 2, 4
    E. 1, 2, 3
    A. 2, 3, 4
    (this multiple choice question has been scrambled)
  43. Steam separators may include:
    1. Dry pipe separator
    2. Wet pipe separator
    3. Cyclone steam separator
    4. Steam scrubbers
    5. Steam washers
    6. Mud drums
    (A) 1,3,4,5
    (B) 1,3,4,5,6
    (C) 2,3,4,5
    (D) 1,6
    (A) 1,3,4,5
    (this multiple choice question has been scrambled)
  44. What are drum internals?
    A. The internal shell
    B. the fittings attached to the boiler drum or shell
    C. The fittings located within the boiler drum
    D. The downcomer
    E. The riser tubes
    C. The fittings located within the boiler drum
    (this multiple choice question has been scrambled)
  45. The removal of impurities from the steam is extremely important because:
    1. The boiler uses too much fuel
    2. They will form deposits in the superheater tubes
    3. The over heating of the tubes will result
    4. Deposits will be formed on the turbine blades
    A. 1, 2, 4
    B. 1, 2, 3
    C. 1, 3, 4
    D. 2, 3, 4
    E. 1, 2, 3, 4
    D. 2, 3, 4
    (this multiple choice question has been scrambled)
  46. The purpose of removing moisture from steam:
    1. Is to lower the solids concentration of the steam
    2. Is to lower the erosion effect on turbines
    3. Is to save water make up to the boiler
    4. Is to save money on the operation of the boiler system
    A. 1, 2, 3
    B. 1, 2, 4
    C. 2, 3, 4
    D. 1, 2, 3, 4
    E. 1, 3, 4
    B. 1, 2, 4
    (this multiple choice question has been scrambled)
  47. The purpose of the steam washer is:
    1. To scrub the incoming water
    2. To absorb any gaseous impurities in the steam
    3. To prevent excessive water make up to the boiler
    4. To prevent silica build up in the superheater tubes
    A. 2, 3
    B. 2, 3, 4
    C. 1, 3
    D. 2, 4
    E. 1, 4
    D. 2, 4
    (this multiple choice question has been scrambled)
  48. The internal feed pipe:
    1. Serves to distribute the incoming feedwater uniformly along the length of the drum
    2. Helps prevent scale build up
    3. Prevents temperature shock
    4. Help prevents turbulence
    A. 1, 2, 4
    B. 1, 2, 3
    C. 2, 3, 4
    D. 1, 3, 4
    E. 2, 3
    D. 1, 3, 4
    (this multiple choice question has been scrambled)
  49. The purpose of the continuous blow-down connection is to:
    A. lower the boiler feed water flow to the boiler
    B. Keep the water at the correct level in the gauge glass
    C. Lower the concentration of dissolved solids in the boiler water
    D. Blow the sludge out of the mud drum
    E. Keep the steam pressure correct
    C. Lower the concentration of dissolved solids in the boiler water
    (this multiple choice question has been scrambled)
  50. The advantage of the continuous blow down compared to the bottom blow off:
    1. Is that the valve is smaller to operate
    2. Is that it is much more accurate to control the water concentration
    3. Is that it can be used with a heat exchanger for economy
    4. Is that it replaces the bottom blow-off completely
    A. 1, 2
    B. 1, 2, 3
    C. 2, 3
    D. 1, 2, 4
    E. 2, 3, 4
    C. 2, 3
    (this multiple choice question has been scrambled)
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317537
Card Set
Chapter 5
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Chapter 5
Updated
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