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Questions and Answers
What ASME code symbol is used to denote a high pressure power boiler?
What ASME code symbol is used to denote a high pressure power boiler?
S
According to the regulation, a licensed operator on watch shall give constant attention and remain within sight and natural sound in both HP and LP boilers.
According to the regulation, a licensed operator on watch shall give constant attention and remain within sight and natural sound in both HP and LP boilers.
False
What is the range of capacity that a High Pressure Boiler Operator can be the Chief Engineer and work as Shift Engineer (stand watch) based on the 12:90 Boiler, Pressure Vessel and Refrigeration rules?
What is the range of capacity that a High Pressure Boiler Operator can be the Chief Engineer and work as Shift Engineer (stand watch) based on the 12:90 Boiler, Pressure Vessel and Refrigeration rules?
Can act as Chief Engineer and stand watch of a plant with a minimum capacity of 100 HP and up to 500 HP.
Any person found performing the duties of a license and holding an expired license shall be subject to what type of penalty?
Any person found performing the duties of a license and holding an expired license shall be subject to what type of penalty?
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Pursuant to N.J.A.C. 12:90, what is the temperature and pressure that defines a high-temperature hot water heating boiler?
Pursuant to N.J.A.C. 12:90, what is the temperature and pressure that defines a high-temperature hot water heating boiler?
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Why are staybolts used in the construction of HRT power boilers?
Why are staybolts used in the construction of HRT power boilers?
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In a fire-tube boiler, how are the tubes usually attached to the tube sheet?
In a fire-tube boiler, how are the tubes usually attached to the tube sheet?
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How are the tube sheets supported in a fire-tube boiler?
How are the tube sheets supported in a fire-tube boiler?
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Where would you find downcomer tubes?
Where would you find downcomer tubes?
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Why are baffles used in the steam drums of water-tube boilers?
Why are baffles used in the steam drums of water-tube boilers?
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In the State of New Jersey, when is it permissible to have only one bottom blow off valve on a boiler?
In the State of New Jersey, when is it permissible to have only one bottom blow off valve on a boiler?
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The maximum size of the bottom blowdown line and the surface blowdown line is:
The maximum size of the bottom blowdown line and the surface blowdown line is:
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N.J.A.C. 12:90 requires that sewer lines be protected from high temperatures and pressure coming from boiler blow-off lines. What device is used for this purpose?
N.J.A.C. 12:90 requires that sewer lines be protected from high temperatures and pressure coming from boiler blow-off lines. What device is used for this purpose?
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By N.J.A.C. 12:90 rules, what is the minimum thickness allowed for an atmospheric type blowdown tank?
By N.J.A.C. 12:90 rules, what is the minimum thickness allowed for an atmospheric type blowdown tank?
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What effect would frequent blowing down of a boiler have on the system?
What effect would frequent blowing down of a boiler have on the system?
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When a low-water fuel cutoff (LWFCO) has activated on a hot water heating boiler what shall happen?
When a low-water fuel cutoff (LWFCO) has activated on a hot water heating boiler what shall happen?
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Which of the following valves is used in a steam feedwater supply line to control the direction of fluid flow and prevent backflow in a system?
Which of the following valves is used in a steam feedwater supply line to control the direction of fluid flow and prevent backflow in a system?
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What is the basic function of the low water cut-off device?
What is the basic function of the low water cut-off device?
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What is the proper procedure for returning a gauge glass to service after installing a new glass?
What is the proper procedure for returning a gauge glass to service after installing a new glass?
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Which of the following is the proper method for testing a low-water cut-off device on a steam boiler?
Which of the following is the proper method for testing a low-water cut-off device on a steam boiler?
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By ASME code, the size of the water column connections to a boiler must be a minimum of:
By ASME code, the size of the water column connections to a boiler must be a minimum of:
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Which of the following could cause a tube in a high-temperature hot water boiler to overheat?
Which of the following could cause a tube in a high-temperature hot water boiler to overheat?
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What would occur if there was a drop in the velocity of the liquid flowing through a heat exchanger?
What would occur if there was a drop in the velocity of the liquid flowing through a heat exchanger?
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An operator must be familiar with how water pressure works and the basic concepts that determine pressure head. Therefore, a column of water 1-inch square and 1-foot high weighs how much?
An operator must be familiar with how water pressure works and the basic concepts that determine pressure head. Therefore, a column of water 1-inch square and 1-foot high weighs how much?
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Most steam boilers are equipped for the gauge glass and water column to be blown down. Generally, the operating rules recommend that the water column and gauge glass be blown down:
Most steam boilers are equipped for the gauge glass and water column to be blown down. Generally, the operating rules recommend that the water column and gauge glass be blown down:
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What will excessive oxygen in the boiler water cause to take place?
What will excessive oxygen in the boiler water cause to take place?
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As solids and alkalinity in boiler water increase:
As solids and alkalinity in boiler water increase:
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What chemical would be used to control scale in a low pressure boiler?
What chemical would be used to control scale in a low pressure boiler?
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What water treatment chemical is used to control alkalinity in boiler feedwater?
What water treatment chemical is used to control alkalinity in boiler feedwater?
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What should new or re-tubed boilers be cleaned with?
What should new or re-tubed boilers be cleaned with?
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On a pH scale what number would represent the most acidic of a solution of feedwater?
On a pH scale what number would represent the most acidic of a solution of feedwater?
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Which of the following would cause scale to form in a low pressure boiler?
Which of the following would cause scale to form in a low pressure boiler?
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What chemical should be added to boiler feedwater to prevent oxidation of the boiler drum and tubes?
What chemical should be added to boiler feedwater to prevent oxidation of the boiler drum and tubes?
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Where is caustic embrittlement most likely to occur?
Where is caustic embrittlement most likely to occur?
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In a boiler plant system, what is the measure of the degree of acid or base of a solution called?
In a boiler plant system, what is the measure of the degree of acid or base of a solution called?
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A three-element feedwater regulator is controlled by what means?
A three-element feedwater regulator is controlled by what means?
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A two-element feedwater control device responds to the boiler drum level and feedwater flow.
A two-element feedwater control device responds to the boiler drum level and feedwater flow.
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What is the function of a vent condenser on a deaerating feedwater heater?
What is the function of a vent condenser on a deaerating feedwater heater?
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Which statement best describes the operation of a closed feedwater heater?
Which statement best describes the operation of a closed feedwater heater?
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What condition would cause a feedwater pump to become vapor bound?
What condition would cause a feedwater pump to become vapor bound?
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A thermal expansion feedwater regulator operates by:
A thermal expansion feedwater regulator operates by:
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A two-element feedwater regulator is controlled by what means?
A two-element feedwater regulator is controlled by what means?
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What device is used on a deaerator to prevent water from backing up into the steam line?
What device is used on a deaerator to prevent water from backing up into the steam line?
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While making a round of your boiler room, the boiler feedwater pump is making a strange noise. The pump casing and the temperature of the water has risen above normal. What would most likely cause this problem?
While making a round of your boiler room, the boiler feedwater pump is making a strange noise. The pump casing and the temperature of the water has risen above normal. What would most likely cause this problem?
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When taking over a shift, the boiler operator must first check:
When taking over a shift, the boiler operator must first check:
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On a boiler feedwater line, what type of valve is used closest to the boiler?
On a boiler feedwater line, what type of valve is used closest to the boiler?
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What would one standard atmosphere at 14.7 psi be equivalent to in feet of water?
What would one standard atmosphere at 14.7 psi be equivalent to in feet of water?
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In your boiler plant you have pumps that are used for numerous applications. One of the pumps has a small amount of liquid coming from the packing gland. Is this normal or is it a problem?
In your boiler plant you have pumps that are used for numerous applications. One of the pumps has a small amount of liquid coming from the packing gland. Is this normal or is it a problem?
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Study Notes
High Pressure Boiler Regulations and Licensing
- ASME code designates the symbol "S" for high pressure power boilers.
- In New Jersey, licensed operators on watch must remain within sight and sound of both high pressure (HP) and low pressure (LP) boilers—this statement is false.
- Chief Engineers in New Jersey can oversee plants with a minimum capacity of 100 HP and up to 500 HP.
- Operating a boiler with an expired license incurs penalties ranging from a minimum of $500 to a maximum of $5,000 per day.
Boiler Classification and Construction
- High-temperature hot water heating boilers exceed 250°F at 160 psi.
- Staybolts reinforce and support flat plates in fire-tube boilers.
- Tubes in fire-tube boilers are usually attached to the tube sheet by rolling and beading the ends.
- Tube sheets are supported by the shell, stays, and tubes.
Boiler Components and Their Functions
- Downcomer tubes are found in water-tube boilers; baffles in steam drums prevent water carry-over.
- In New Jersey, only one bottom blow-off valve is allowed on boilers with a maximum allowable working pressure (MAWP) not exceeding 100 psi.
- Bottom and surface blowdown lines have a maximum size of 2.5 inches.
- Blowdown tanks are required by N.J.A.C. 12:90 to protect sewer lines from high temperatures and pressures caused by boiler blow-off lines.
Safety and Maintenance Devices
- The low-water fuel cutoff (LWFCO) should trigger a safety shutdown requiring a manual reset if activated on a hot water heating boiler.
- Check valves control fluid direction and prevent backflow in steam feedwater supply lines.
- The basic function of a low water cut-off device is to shut off the fuel supply to the burner.
- Proper procedure for returning a gauge glass to service includes opening the drain and cracking open the top valve.
Operational Procedures and Effects
- Testing a low-water cut-off device necessitates lowering the water level until the burner shuts down.
- Water column connections to a boiler, per ASME code, must have a minimum size of 1 inch.
- Poor circulation can cause overheating in high-temperature hot water boilers.
Water Treatment and Chemical Management
- A column of water 1-inch square and 1-foot high weighs 0.433 lbs, crucial for understanding pressure head.
- Frequent blowing down of a boiler results in blowdown heat loss; excessive oxygen in boiler water can lead to pitting of boiler metal.
- Scale in boiler water increases with rising solids and alkalinity, and calcium and magnesium are primary causes of scale formation.
- Phosphate is used to control scale in low pressure boilers, while caustic soda manages alkalinity in boiler feedwater.
Boiler Chemistry and pH Management
- New or re-tubed boilers should be cleaned with an alkaline detergent solution.
- The most acidic solution on a pH scale is represented by the number 0; a pH level measures the degree of acidity or basicity in solution.
- Sodium sulfite is added to feedwater to prevent oxidation of the boiler drum and tubes, addressing caustic embrittlement, often found in riveted joints below the waterline.
Feedwater Management Systems
- Three-element feedwater regulators respond to steam flow, feedwater flow, and drum level; two-element regulators respond to boiler drum level and steam flow rate.
- Vent condensers on deaerating feedwater heaters condense steam to prevent loss, while in closed feedwater heaters, steam and water do not mix.
- A feedwater pump may become vapor bound if feedwater temperature is excessively high.
- Thermal expansion feedwater regulators operate through the expansion and contraction of a thermostatic element.
Operational Considerations for Boiler Rooms
- An overflow device prevents water backing up into the steam line in deaerators.
- A typical noise and elevated temperature from a feedwater pump indicate a cavitation issue.
- Before shift changes, operators should check water levels in all online boilers by blowing down the water column and gauge glass.
- The stop valve is positioned closest to the boiler on feedwater lines.
- One standard atmosphere (14.7 psi) correlates to approximately 34 feet of water pressure.
Studying That Suits You
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Description
Prepare for the NJ High Pressure Black Seal Exam with these informative flashcards. Each card presents essential questions and answers related to ASME codes and regulations for high pressure boilers. Strengthen your understanding and readiness for the exam with key concepts and facts.
