3rd Engineer Flashcards

1
Q

Can a safety valve be threaded? Where can this information be found?

A

A safety valve can be threaded up to 3”. Greater than 3” requires a weld or flanged inlet ASME Code Section I: Construction of Power Boilers

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2
Q

What kind of amines are there?

A

Neutralizing amines and filming amines. Neutralizing amines raise the pH of the condensate in the return line. Filming amines coat the line and must be continuously fed (usually injected into the steam header). The condensate will have a low pH, but will not make contact with the return line as long as the filming amines are still being pumped in.

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3
Q

How do you control scale at your plant? How does it work?

A

We control scale with polymer, which gives scale forming minerals a like-charge (same charge. Not sure if it’s positive or negative), which causes them to repel. Polymer also helps remove existing scale to some degree.

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4
Q

What can you do with a 3rd Engineer license? Where can this information be found?

A

Have charge of and operate a boiler or boilers not exceeding, in the aggregate, 150 horsepower when solid fuel is burned or not exceeding, in the aggregate, 500 horsepower when steam is generated by the use of liquid or gaseous fuel, electric or atomic energy or any other source of heat and an engine or engines not exceeding 50 horsepower each or to operate a second class plant under the engineer in direct charge thereof. This can be found in Massachusetts General Laws Chapter 146 Section 49: Classes of Licenses and Work Permitted

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5
Q

Explain what periodic, noncontinuous, and continuous attendance are and where that information can be found.

A

Massachusetts General Laws Chapter 146 Section 46: Necessity of License for Engineers and Firemen; Exceptions. Periodic Attendance: Engineer or fireman must perform daily maintenance as required by the department’s maintenance logbook, must remain in the same building, boiler must be equipped with automatic shutdown devices, safe operation of the boiler shall be the primary duty of the operator and the operator has full discretion to return to the boiler room for monitoring and all such visits shall be required to be recorded in the department’s logbook. Noncontinuous: In addition to requirements of periodic Attendance, remote monitoring station that can shut down the boiler, and the operator has to inspect the boiler between 4 and 6 times per shift. Continuous: manned by a licensed operator at all times

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6
Q

Where in the Laws, codes, or regulations can horsepower of boilers, engines, and turbines be found?

A

Massachusetts General Laws Chapter 146 Section 48: Ascertainment of Horsepower

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7
Q

What are reportable accidents/incidents and what must you do when a reportable incident occurs? Where can this information be found?

A

Reportable incidents/accidents are defined as accidents or incidents that result in serious injury/illness or damage exceeding $10,000 per incident (definition can be found in CMR 522 Section 1: General Provisions). In the event of a reportable accident/incident, the owner/user or the engineer in charge shall notify the Massachusetts Emergency Management Agency at 508-820-2000 within 24 hours. This information is found in CMR 522 Section 2: Power Boilers.

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8
Q

How much notice must be given when accepting or leaving an Engineer in Charge position? Where can this information be found?

A

All Engineers and Firemen in charge of steam boilers and/or engines shall notify the department in writing, within seven days of accepting or leaving a position. CMR 522 Section 2: Power Boilers

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9
Q

What code would you look at to find out about pressure vessels such as deaerators and blowdown tanks?

A

ASME Code Section 8: Pressure Vessels

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10
Q

Where can you go in the code to find out about welding?

A

ASME Code Section 9: Welding and Brazing CMR 522 Section 11: Welding Specifications

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11
Q

What are the four parts of the National Board Inspection Code?

A

Part 1: Installation Part 2: Inspection Part 3: Repairs and Alterations Part 4: Pressure Relief Devices

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12
Q

What are the four parts of the National Board Inspection Code?

A

Part 1: Installation Part 2: Inspection Part 3: Repairs and Alterations Part 4: Pressure Relief Devices

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13
Q

Where can you find information on boiler controls and safety devices?

A

CMR 522 Section 16: Controls and Safety Devices for Automatically Fired Boilers ASME Code CSD-1. (CSD is Controls and Safety Devices)

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14
Q

A boiler is 150 PSI. Where do boiler proper, boiler external piping, and non-boiler external piping begin and end on the blowdown line? What code does each fall under?

A

Boiler proper ends at the first weld/flange/threaded connection and falls under ASME Code Section 1: Construction of Power Boilers Boiler external piping begins where boiler proper ends, and goes to the last required valve by code, so that would be up to and including the 2nd (outside) blowdown valve. This also falls under ASME Code Section 1: Construction of Power Boilers. Power piping which is outside of the boiler external piping is boiler non-external piping and falls under ASME B31.1: Power Piping

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15
Q

What are the minimum sizes for a water column connection to the boiler, water column drain, gauge glass connection to the water column, and gauge glass drain? Where can this info be found?

A

Water column to the boiler: 1” Water column drain: 3/4” Gauge glass to water column: 1/2” Gauge glass drain 1/4” Found in ASME Code Section 1: Construction of Power Boilers

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16
Q

Where can you go in the code to learn about how to operate and take care of power boilers?

A

ASME Code Section 7: Recommended Guidelines for the Care of Power Boilers

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17
Q

Where can you find information regarding non-destructive examinations?

A

ASME Code Section 5: Non-destructive Examinations

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18
Q

Where in the code can information on heating boilers be found? What stamp is required on a heating boiler?

A

ASME Code Section 4: Heating Boilers An H stamp is required

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19
Q

Who are the National Board of Boiler and Pressure Vessels Inspectors?

A

Composed of Chief Inspectors of states and municipalities in the US and provinces in Canada. This board, since its organization in 1919, has functioned to uniformly administer and enforce the rules of the Boiler and Pressure Vessel Code. Our Chief Inspector Edward Kawa is a member

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20
Q

Who is the ASME Boiler and Pressure Vessel Committee?

A

ASME set up a committee in 1911 to form rules for construction of power boilers and other pressure vessels. They establish rules of safety to govern the design, fabrication, and inspection during construction of boilers and pressure vessels and interpret these rules when questions arise regarding their intent.

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21
Q

What is the Board of Boiler Rules, who are the members, and what are there roles?

A

The Board of Boiler Rules is a 5 member board tasked with promulgating regulations for boilers and pressure vessels 522 CMR for Massachusetts. 5 Members are: Edward Kawa: Chief of Inspections Anthony Lucia: Operating Engineers Charles Perry: Boiler Manufacturers Leah Francis: Insurers of Boilers Max Greig: Boiler Users

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22
Q

If you replaced or repaired a water column drain valve closest to the boiler, what code would be used and what paperwork would need to be filled out?

A

ASME Code Section 1: Construction of Power Boilers primarily, but I would mention CMR 522 Section 2. A BPV-034 Boiler External Piping Report of Mechanical Repair must be completed within 7 days

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23
Q

How often does the Chief Engineer have to be at the plant? What must be done when the Chief is not present? Where can this information be found?

A

The Engineer in Charge shall make daily visits to the plant. It is reasonable for the Engineer in Charge to perform his or her duties at the facility 5 times per week. The Engineer in Charge will leave daily written instructions to the operators and those instructions must be able to be made available to the District Engineering Inspector upon request. Found in CMR 522 Section 2: Power Boilers

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24
Q

Where in the code/regulations/laws can you go to find out about opacity and continuous emissions monitoring systems?

A

CMR 310 Section 7: Air Pollution

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25
Q

How many safety valves do you have on your boilers? What pressure do they lift at and what is the capacity?

A

Two Kunkle safety valves. Set at 85 PSI. Each safety valve relieves 6,538 pounds per hour for an aggregate of 13,076 pounds per hour per boiler. 2” connection.

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26
Q

Does your Economizer have safety relief valves? If so, what is the popping pressure and capacity?

A

Yes each economizer has a safety relief valve set at 300 PSI and a capacity of 1,891 pounds per hour. 1/2” connection

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27
Q

What chemical tests do you do at your plant?

A

pH and conductivity on boilers, feedwater, condensate returns, surge tank, and soft water Sulfite residual on boilers and feedwater Hardness on condensate returns, surge tank, feedwater, and soft water Polymer on boilers OH Alkalinity on boilers

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28
Q

What is the pressure and temperature of your DA?

A

5 PSI. 227 F

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29
Q

What are the minimum and maximum sizes of bottom blowdown and surface blowdown connections?

A

Bottom blowdown: minimum 1” and max 2.5” Surface blowdown : no minimum and max 2.5”

30
Q

Where can you find information on air tanks? What stamp does it have on it?

A

ASME Code Section 8: Rules for Construction of Pressure Vessels CMR 522 Section 7: Air Tanks Has a U stamp

31
Q

Why use hydrogen cooled generators instead of air?

A

Higher specific heat. H2 is about 3.4 compared to .24 for air. Less windage (air brings in moisture) The generator can be constructed three times smaller Increased stator life due to less moisture (possibly)

32
Q

What kind of resin is used in water softeners?

A

Sodium zeolite

33
Q

How does a hydrogen seal oil system work?

A

A regulator is used to maintain 5 to 8 PSI higher than the hydrogen pressure. It is sealed on the generator and turbine sides

34
Q

How can you prevent pulsation (large surges of air) in a gas turbine?

A

Inlet guide vanes control the amount of air going to the axial air compressor. They work similar to shutters. They don’t close more than 33 degrees and don’t open more than 88 degrees. At MMWEC we also used an 11th stage extraction which would send air to the stack when the gas turbine was at less than 90% speed.

35
Q

What are some benefits of vent mist eliminators?

A

Remove lube oil vapor Remove moisture Remove entrained hydrogen Pull a negative which allows the lube/seal oil return to flow better

36
Q

What is subcooling? How is it accomplished?

A

Subcooling is intentionally keeping the hotwell temperature 5 to 8 degrees below the saturation temperature to prevent the hotwell from flashing due to swings in pressure/vacuum. It is accomplished by increasing circulating water flow

37
Q

What is the first law of thermodynamics?

A

Energy cannot be created or destroyed. It can only be transferred from one form to another (will have to double check the wording on this)

38
Q

What is the second law of thermodynamics

A

Essentially that no machine is 100% efficient. No machine, actual or ideal, can both continuously and completely transform heat into mechanical energy (definitely going to have to double check this one)

39
Q

What two thermodynamic cycles are used in a modern generating plant?

A

Brayton cycle (gas turbines) Rankine cycle (steam turbines)

40
Q

I wouldn’t put too much effort into this question, but the inspector asked it on mine. How is MAWP calculated?

A

Depends on the given information, but I remember it as STEFR. (S x T x E) / (F x R) S= Tensile strength of the material in PSI T= Thickness of the material in inches E= Efficiency of the joint F= Factor of safety R= Radius of the drum in inches

41
Q

What is popping pressure tolerance and what are the tolerances for safety valves?

A

Popping pressure tolerance is the difference between set pressure and popping pressure. Plus or minus. For pressures up to 70 PSI it is 2 PSI For pressures from 71 to 300 PSI it is 3% For pressures over 300 PSI up to 1,000 PSI it is 10 PSI For pressures greater than 1,000 PSI it is 1%

42
Q

How many purges are required for a boiler?

A

8 volume air changes. Found in ASME Code Section 7: Recommended Guidelines for Care of Power Boilers

43
Q

What are isenthalpic and isentropic?

A

Isenthalpic is when a process maintains constant enthalpy such as a pressure reducing valve (big gain in entropy though) Isentropic (adiabatic) is constant entropy. Nothing on earth is isentropic

44
Q

Tell me about your economizers

A

Parallel flow. Stainless steel. MAWP is 400 PSI. It is isolable, meaning there are isolation valves and it can be isolated. It has a U stamp and a safety relief valve set at 300 PSI with a capacity of 1,891 PPH

45
Q

Tell me about it out your feedwater pumos

A

8 stage vertical centrifugal pumps. 53 GPM (or about 26,500 PPH). Goulds ESV 10. Each pump has a 10 horsepower Baldor-Reliance motor. The pumps use VSDs

46
Q

What is th conductivity and pH of your boilers?

A

We maintain 3,000 to 3,500 microSiemens/cm and a pH of 10.5 to 12. The pH is usually around 11

47
Q

What are the pH and conductivity of your feedwater?

A

Feedwater pH range is 8.5 to 10.5 but is normally just below 10. The conductivity range is 10 to 200 microSiemens/cm

48
Q

What are the pH and conductivity of your condensate returns? What about your condensate receiver?

A

Return pH range is 8.0 to 9.3. Return conductivity range is less than 25 microSiemens/cm. Ours is usually about 18 Receiver pH is 7.5 to 9.0 from Nalco. We keep it at around an 8.5 Receiver conductivity range is 10-150 MicroSiemens/cm. We usually keep it between 50 and 100 roughly

49
Q

What is the pH, conductivity, and hardness of your city water coming in?

A

pH is roughly 7.8 to 8.2 Conductivity is about 408 to 438 microSiemens/cm Hardness is about 60

50
Q

What information is on the Chief Engineer’s log book?

A

Name and address of plant Boiler # Type of boiler Pressure allowed Safety valve set pressure Safety valve capacity Month and Year Date Time in and time out Reviews state operators log book Notes of boiler and/or turbine operation as well as note of repairs made, boilers washed, visits of state or insurance insoecto s Signature of Chief Engineer Engineer in Charge License # Home address Home phone

51
Q

What information is on the operator’s state log book?

A

Name of plant and street address Type of boiler Pressure allowed Safety valve set pressure and capacity Month and Year Date Time Continuous blowdown setting Surface blowdown valves opened Gage glass blown down Low water cutoff tested Safety valve manually tested Aux equipment checked Boiler ignition verified (on startup) Boiler room cleaned What was the internal conditions observed when the boiler was opened? Operator notes Signature and license # of operator Engineer-in-Charge License # Home address Home phone

52
Q

What stamp is used for heating boilers? Where can you find code/laws/regulations on heating boilers?

A

ASME Code Section 4: Heating Boilers CMR 522 Section 4: Heating Boilers and Other Heat Storage Sources

53
Q

What are three ways to reduce thrust?

A

Double flow casings Opposed flow casings Balance (dummy) pistons

54
Q

What types of turbines are there?

A

Condensing turbines Bleeder turbines Backpressure/non-consenting turbines Extraction turbines Topping turbines (turbine exhausts to another turbine) Mixed pressure turbines Cross-compound turbines (2 shafts 2 generators) Tandem compound turbines (2 or more casings on 1 shaft)

55
Q

What causes turbine vibration? At least 5. What is vibration measured in?

A

High eccentricity Bowed rotor Oil whip Critical speeds Imbalance Worn bearings Binding/rubbing Misalignment Measured in mils

56
Q

What code does boiler non-external piping fall under?

A

B31.1: Power Piping

57
Q

What code do boiler proper and boiler external piping fall under?

A

ASME Code Section 1: Construction of Power Boilers

58
Q

Does a form need to be filled out if you’re just replacing boiler external piping?

A

Yes. A boiler external piping (BEP) report of mechanical repair must be completed and submitted to the department within 7 days of the completion of the repair. We email it to the Chief of Inspections and CC the District Inspector

59
Q

What is the difference between a reheat stop valve and a reheat intercept valve?

A

A reheat stop valve is fully open or closed and is normally full open. It closes on a trip. An intercept valve does the same, except it will modulate during an overspeed to reduce turbine speed. Modulates at 101 to 106% of rated speed.

60
Q

Name at least 3 benefits of surface condensers. (Four listed)

A

Reduces backpressure which maximizes efficiency and reduces heat rate. Allows for reuse of high quality water in the boiler and minimizers water treatment costs Deaerators the condensate, minimizing the potential for corrosion. Serves as a collection point for all condensate drains.

61
Q

Name 3 types of surface condensers

A

Single pass Two pass Split box condenser

62
Q

What are the two types of air cooled condensers?

A

Direct acting - uses a fan with external finned tubes Indirect acting - example is a hyperbolic cooling tower. No fan

63
Q

If a turbine driven generator is running at 3600 RPMs, how many poles does it have? What about 1800 RPMs?

A

3600 RPMs is a 2 pole generator 1800 RPMs is a 4 pole generator

64
Q

3 methods to check safety valve capacity

A

Accumulation test Evaporative capacity of the feedwater Based on square feet of heating surface and using Table PG-70 (A-44) Measuring the maximum fuel used and using the ASME Code formula: W= (C x H x .75) / 1100 W is weight of the steam in PPH C is weight of the of the fuel H is BTU value of the fuel .75 is the average efficiency of a boiler 1,100 is the BTU content of steam

65
Q

Where can you find information on refrigeration?

A

MGL Chapter 146 CMR 522 Section 9: Refrigeration and Air Conditioning Systems

66
Q

Where can you find information regarding materials?

A

ASME Code Section 2: Materials CMR 522 Section 10: Material Specifications

67
Q

Where can you find code/laws/regulations on boiler safety valves?

A

ASME Code Section 1: Construction of Power Boilers NBIC Part 4: Pressure Relief Devices Maybe NBIC Part 1: Installation

68
Q

What code/laws/regulations would you look at before having a weld performed on a boiler?

A

NBIC Part 3: Repairs and Alterations ASME Code Section 9: Welding and Brazing CMR 522 Section 11: Welding Specifications ASME Code Section 1: Construction of Power Boilers CMR 522 Section 2: Power Boilers

69
Q

When does a boiler need two gage glasses? Are there any exceptions?

A

Boilers at 400 PSI or higher require two gage glasses. If the safety valve relieving capacity is 900 PSI or greater, one of those gage glasses can be substituted for two remote level indicators

70
Q

What are 5 trips on your boiler?

A

Low water

High Water

Pressure (about 70 PSI)

High furnace pressure

High flue gas temp (600F)

Low O2 (1.5%)

Insufficient Air flow

Insurfficient purge air flow on startup

Flame failure

Pilot failure

High gas pressure

Low gas pressure

71
Q
A