AR Boiler Operator flashcards
AR Boiler Operator · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- External boiler inspection
- An examination of the boiler without opening it, covering the shell, fittings, piping, insulation, supports, and accessible safety devices to confirm safe operating condition.
- Internal boiler inspection
- An examination performed after the boiler is cooled, drained, opened, and cleaned, allowing the inspector to view the shell, tubes, tube sheets, stays, and internal surfaces.
- Hydrostatic test purpose
- A pressure test with the boiler filled with water, used to verify strength and tightness when visual inspection cannot resolve questions about pressure-retaining parts.
- Ultrasonic thickness testing
- A nondestructive method that measures remaining wall thickness of pressure parts to evaluate metal loss caused by corrosion or erosion.
- Safety valve test lever
- A lever on the safety valve that is lifted during inspection to confirm the valve opens freely, discharges, and reseats without sticking.
- Certificate of inspection
- A document issued after a satisfactory inspection that states the boiler's maximum allowable working pressure and authorizes operation until the next required inspection.
- Operating without certificate
- Running a boiler that requires a certificate of inspection but does not have a valid one, which is a violation enforceable by the state boiler authority.
- Operator license grade
- The class or grade of operator license that authorizes operation only of boilers within specified size, pressure, or type limits.
- License renewal requirements
- The conditions for keeping an operator license valid, typically documented continuing education hours and payment of a renewal fee before the expiration date.
- Installation permit
- A permit obtained before installing or relocating a boiler, requiring plan review and approval by the state boiler authority before work begins.
- Scope of license
- The limits on what a licensed operator may legally operate; exceeding the grade's limits can lead to suspension or revocation of the license.
- MAWP calculation basis
- Maximum allowable working pressure is computed from shell thickness, shell diameter, joint efficiency, and allowable stress using the applicable ASME code formula.
- Joint efficiency
- A factor applied in shell thickness and pressure formulas that reflects the strength of a welded or riveted longitudinal seam compared with solid plate.
- Staybolt function
- Staybolts tie flat or stayed surfaces together to resist pressure loads; their size, spacing, and pattern are governed by code rules.
- Safety valve capacity rule
- The safety valve's rated relieving capacity must equal or exceed the boiler's maximum steaming capacity at the maximum allowable working pressure.
- Boiler nameplate data
- A plate listing manufacturer, maximum allowable working pressure, design pressure, heating surface, and other data that must agree with inspection records.
- Reinforced openings
- Handholes, manholes, and other openings that remove pressure-retaining metal must have added reinforcement to restore the strength of the shell.
- Safety valve discharge piping
- Piping from the safety valve that must be independent, unobstructed, and freely draining so no back pressure builds against the valve.
- Post-repair hydrostatic test
- A water pressure test at the required pressure performed after major repairs to pressure parts before the boiler is returned to service.
- Combustion air sizing
- The supply of air to the burner must match burner input; inadequate air causes incomplete combustion, soot, and carbon monoxide production.
- Boiler setting requirements
- The boiler must be set level with clearance for inspection, cleaning, and access to fittings, safety devices, and valves.
- Concealed work notification
- The inspector must be notified before pressure parts are covered by insulation, refractory, or casing so the work can be examined.
- Low-water fuel cutoff test
- A safety test in which water is lowered to the cutoff level to confirm the burner shuts down before the water falls out of safe range.
- Gauge glass blowdown
- Opening the gauge glass drain to clear the glass and its connections, confirming that the indicated water level is true and not from a plugged connection.
- Bottom blowdown purpose
- Blowing water from the bottom of the boiler to remove sludge and sediment, done at low fire while the water level is watched closely.
- Safety valve set pressure
- The pressure at which the safety valve begins to open, set at or below the boiler's maximum allowable working pressure.
- Flame scanner function
- A combustion safeguard device that proves a flame is present and shuts off fuel if flame is lost, preventing fuel accumulation and explosion.
- Feedwater treatment
- Chemical treatment of boiler feedwater to control scale, corrosion, and carryover, with blowdown frequency set by tested water chemistry.
- Arkansas Boiler Safety Act
- The state law governing boiler construction, inspection, and operation, administered by the state boiler inspection authority within the labor department.
- Inspector stop-work order
- An order by the inspector taking an unsafe boiler out of service; operating that boiler after the order is prohibited by the Act.
- Adopted construction codes
- The recognized codes adopted by state rule, such as ASME for new construction and the NBIC for repairs and alterations to existing boilers.
- Accident reporting duty
- The owner or operator must report boiler accidents, explosions, or serious injuries to the state boiler authority as required by rule.