Boiler Plant Checks
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Questions and Answers

What is the primary purpose of having a handover discussion with the previous shift members?

  • To discuss the operating condition of all plant equipment
  • To perform checks specific to hot water or steam boilers
  • To review the boiler operation chapter
  • To read and clarify the log book and be aware of the state of the power plant (correct)

    • What should engineers returning to shift after a set of days off do regarding the log book?

  • Read the log book from the start of the month
  • Not read the log book at all
  • Read the log book as far back as the last time they took charge of the plant (correct)
  • Only read the current log book entry

    • What is commonly referred to as doing 'rounds'?

  • Reviewing log sheets
  • Reading the log book
  • Performing checks specific to hot water or steam boilers
  • Becoming familiar with the operating condition of all plant equipment (correct)

    • How often may critical equipment be checked during a shift?

    <p>More often than less critical equipment</p> Signup and view all the answers

    What is the purpose of reviewing log sheets during a shift handover?

    <p>To ensure a smooth transition between shifts</p> Signup and view all the answers

    What determines the frequency of operator rounds?

    <p>All of the above</p> Signup and view all the answers

    What is the primary purpose of conducting rounds in a plant?

    <p>To assess the operating condition of the plant using multiple senses</p> Signup and view all the answers

    What is the typical frequency of checks in a comprehensive set of rounds?

    <p>One to two hours</p> Signup and view all the answers

    Who typically performs the boiler plant rounds?

    <p>The shift engineer</p> Signup and view all the answers

    What is the recommended action if the boiler water level is not at set point?

    <p>Blow down the water column and gauge glass</p> Signup and view all the answers

    What is the purpose of checking the boiler feed pumps?

    <p>To check for vibration, unusual noise, leaks, and discharge pressure</p> Signup and view all the answers

    What is the indication of rusty coloured condensate in the condensate receiver?

    <p>Corrosion in the condensate return system</p> Signup and view all the answers

    What is the purpose of manually activating the condensate tank float switch?

    <p>To start the pump</p> Signup and view all the answers

    What is the typical operating pressure range of a deaerator?

    <p>Between 70 and 400 kPa</p> Signup and view all the answers

    What is the indication of a water temperature below the saturation pressure of the steam in a deaerator?

    <p>The deaerator vent is obstructed</p> Signup and view all the answers

    Why is it important to check the standby pump in a steam boiler plant?

    <p>To ensure it is ready to be put in service if the primary pump fails</p> Signup and view all the answers

    What is the approximate absolute pressure corresponding to 99 kPag?

    <p>200 kPa</p> Signup and view all the answers

    What is the ideal temperature of deaerated water at 99 kPag?

    <p>120°C</p> Signup and view all the answers

    What is the primary purpose of checking the brine tank in a water treatment plant?

    <p>To monitor the level of undissolved salt</p> Signup and view all the answers

    What is the typical condition of the expansion tank in a hot water boiler plant?

    <p>About half way full</p> Signup and view all the answers

    What should the heating loop temperature be in a hot water boiler plant?

    <p>At the set point</p> Signup and view all the answers

    Why is it essential to check the safety valves in a hot water boiler plant?

    <p>To ensure they are functioning properly</p> Signup and view all the answers

    What is the primary cause of excessive draft loss in a boiler?

    <p>Fireside obstruction</p> Signup and view all the answers

    What is the ideal condition of the flame in a boiler plant?

    <p>Bright and free of soot</p> Signup and view all the answers

    Why is it necessary to check the flue gas temperature in a boiler plant?

    <p>To identify potential problems with the heat exchanger</p> Signup and view all the answers

    What is the primary purpose of performing water tests in a water treatment plant?

    <p>To monitor the quality of the water</p> Signup and view all the answers

    What is the purpose of blowing down the water column and gauge glass every shift?

    <p>To remove any sediment that may collect</p> Signup and view all the answers

    What can happen if the gauge glass is blown down frequently on large boilers?

    <p>The life of the mica will be shortened and increase maintenance costs</p> Signup and view all the answers

    What should be done if the gauge glass becomes obscured by internal corrosion or deposits?

    <p>It should be renewed</p> Signup and view all the answers

    What is the purpose of monitoring the feedwater level controllers regularly?

    <p>To ensure the boiler water level is at set point</p> Signup and view all the answers

    What is an indication of a failed steam trap?

    <p>Constant flow of steam from the test valve</p> Signup and view all the answers

    What is an indirect method of checking a steam trap?

    <p>Using a hand-held infrared thermometer</p> Signup and view all the answers

    What is the primary purpose of ensuring unobstructed air openings into the boiler room?

    <p>To provide fresh air for ventilation and combustion</p> Signup and view all the answers

    What is the role of the assistant shift engineer in plant rounds?

    <p>To conduct the plant rounds</p> Signup and view all the answers

    What is the primary function of the air compressor in the power plant?

    <p>To provide compressed air for automatic valves</p> Signup and view all the answers

    Why is it essential to ensure the air inlet of the air compressor is free from obstruction?

    <p>To ensure adequate compressed air pressure</p> Signup and view all the answers

    What is the purpose of checking the dew point of the compressed air?

    <p>To ensure the air is dry enough for automatic valves</p> Signup and view all the answers

    Why is it crucial to maintain the correct coolant flow in the air compressor?

    <p>To reduce the risk of overheating</p> Signup and view all the answers

    What is the purpose of the block heater in the standby generator?

    <p>To warm the engine for starting</p> Signup and view all the answers

    Why is it essential to clean up spills immediately in the boiler room?

    <p>To promote a safe work environment</p> Signup and view all the answers

    What is the purpose of checking the electrolyte levels in the standby generator's batteries?

    <p>To maintain the correct electrolyte levels for engine starting</p> Signup and view all the answers

    Why is it important to segregate unidentified materials in the boiler room?

    <p>To ensure safe disposal of hazardous materials</p> Signup and view all the answers

    What is the correct procedure to follow when a water column blowdown is completed at the beginning of every shift?

    <p>Check that the steam side and waterside isolating valves are fully open.</p> Signup and view all the answers

    Why is it important to check for leaks that develop during maintenance?

    <p>To prevent hazards that do not normally exist during maintenance.</p> Signup and view all the answers

    What is the purpose of recording areas that need replacement lamps?

    <p>To make plant areas with burned out luminaires safe.</p> Signup and view all the answers

    What should be done with open floor grates that were removed to facilitate maintenance?

    <p>They should be taped off with caution tape.</p> Signup and view all the answers

    What is the correct procedure to follow when a gauge glass is connected to a water column?

    <p>Close the gauge steam and water valves to isolate the gauge.</p> Signup and view all the answers

    What is the purpose of blowing down the water column?

    <p>To clear the passages on the water column and gauge glass.</p> Signup and view all the answers

    In what situations are isolation valves in the steam and water piping between the water column and the boiler used?

    <p>In high-pressure steam boilers.</p> Signup and view all the answers

    What should be done after the water column blowdown is completed?

    <p>The water column should be placed back in operation.</p> Signup and view all the answers

    Why is it important to observe changing conditions during maintenance?

    <p>To identify hazards that do not normally exist.</p> Signup and view all the answers

    What should be done with plant areas that are unsafe due to burned out luminaires?

    <p>They should be signposted warning of the hazards.</p> Signup and view all the answers

    What is the primary purpose of reading the log book prior to the start of a shift?

    <p>To become aware of the state of the power plant</p> Signup and view all the answers

    How often may operator rounds be performed in a shift?

    <p>Once, twice, or three times per shift</p> Signup and view all the answers

    What is the purpose of reviewing log sheets during a shift handover?

    <p>To discuss the activities of the previous shift</p> Signup and view all the answers

    Who should read the log book as far back as the last time they took charge of the plant?

    <p>Engineers returning to shift after a set of days off</p> Signup and view all the answers

    What is the purpose of the handover discussion with the previous shift members?

    <p>To discuss the activities of the previous shift</p> Signup and view all the answers

    What determines the frequency of operator rounds?

    <p>All of the above</p> Signup and view all the answers

    What is the primary purpose of assessing the operating condition of the plant using all the senses during rounds?

    <p>To identify potential safety hazards</p> Signup and view all the answers

    Which of the following is an indication of corrosion in the condensate return system?

    <p>Rusty coloured condensate</p> Signup and view all the answers

    What is the purpose of adjusting the pump packing in boiler feed pumps?

    <p>To prevent shaft leakage</p> Signup and view all the answers

    What is the indication of a defective make-up water softening equipment in the condensate receiver?

    <p>Hard condensate</p> Signup and view all the answers

    What is the purpose of ensuring the standby pump is ready to be put in service in a steam boiler plant?

    <p>To provide redundancy in case of primary pump failure</p> Signup and view all the answers

    What is the purpose of checking the deaerator vent valve during boiler plant rounds?

    <p>To vent non-condensable gases</p> Signup and view all the answers

    What is the indication of a failed condensate return tank pump?

    <p>Water flowing from the condensate tank vent</p> Signup and view all the answers

    What is the purpose of checking the boiler pressure during boiler plant rounds?

    <p>To ensure the boiler pressure is at or near set point</p> Signup and view all the answers

    What is the purpose of checking the condensate receiver level during boiler plant rounds?

    <p>To ensure the condensate receiver level is indicated on the gauge glasses</p> Signup and view all the answers

    What is the purpose of checking the steam pressure during boiler plant rounds?

    <p>To ensure the main steam header pressure is normal</p> Signup and view all the answers

    What is the primary reason for checking the brine tank level in a sodium zeolite softener?

    <p>To check for undissolved lumps of salt</p> Signup and view all the answers

    What is the indication of a temperature reading of 105°C on a deaerator operating at 100 kPag?

    <p>The temperature is not acceptable</p> Signup and view all the answers

    Why is it important to check the operation of equipment in the water treatment area of the power plant?

    <p>To check for leaks and vibration</p> Signup and view all the answers

    What should be done if the safety valves on the boilers or the heating system are lifting?

    <p>Check the level of water in the expansion tank</p> Signup and view all the answers

    What is the purpose of performing a water test in a water treatment plant?

    <p>To ensure the regeneration completed successfully</p> Signup and view all the answers

    What is the indication of a high temperature reading on a boiler?

    <p>The high temperature cut-off set point is reached</p> Signup and view all the answers

    What is the purpose of checking the flow totalizer in an ion-exchange softener?

    <p>To determine when a regeneration is necessary</p> Signup and view all the answers

    What is the primary reason for checking the heating loop temperature in a hot water boiler plant?

    <p>To ensure the heating loop temperature is at the required set point</p> Signup and view all the answers

    What is the indication of a low temperature reading on a deaerator operating at 100 kPag?

    <p>The temperature is not acceptable</p> Signup and view all the answers

    What is the primary purpose of checking the pumps in a hot water boiler plant?

    <p>To check for leaks and unusual noise</p> Signup and view all the answers

    What is the primary reason for assessing lighting in a power plant?

    <p>To identify areas that need replacement lamps and record them</p> Signup and view all the answers

    What is the purpose of opening the water column drain valve during a water column blowdown?

    <p>To prove the steam connection is clear</p> Signup and view all the answers

    What is the correct procedure for checking the water level in a boiler?

    <p>Ensure the water column is not obstructed, then check the water level</p> Signup and view all the answers

    What is the purpose of taping off or signposting areas with open floor grates that were removed to facilitate maintenance?

    <p>To prevent tripping hazards</p> Signup and view all the answers

    Why is it important to observe changing conditions during maintenance?

    <p>To prevent hazards that do not normally exist</p> Signup and view all the answers

    What is the main purpose of blowing down the water column and gauge glass on smaller high-pressure boilers?

    <p>To remove sediment that may collect</p> Signup and view all the answers

    What is the purpose of the detailed procedures for checks during plant rounds?

    <p>To provide specific instructions for performing checks during plant rounds</p> Signup and view all the answers

    What is the primary purpose of ensuring unobstructed air openings into the boiler room?

    <p>To provide a clear path for combustion air</p> Signup and view all the answers

    What is the indication of a failed steam trap, as observed during a direct method of checking?

    <p>Constant flow of steam from the test valve</p> Signup and view all the answers

    Why is it important to report areas that need replacement lamps to the shift engineer?

    <p>To facilitate maintenance and ensure safety</p> Signup and view all the answers

    What is the purpose of checking the water column connections during a water column blowdown?

    <p>To prove the steam and water connections are clear</p> Signup and view all the answers

    Why is it important to monitor the feedwater level controllers regularly?

    <p>To ensure the boiler water level is at set point</p> Signup and view all the answers

    What is the role of the air compressor in the power plant?

    <p>To provide dry compressed air for automatic valves and damper positioners</p> Signup and view all the answers

    What is the recommended action to take when the intake louvres on the exterior of the building are found to be blocked?

    <p>Clean the intake louvres to ensure proper airflow</p> Signup and view all the answers

    What is the recommended procedure to test the operation of the feedwater control valve?

    <p>Close the isolation valve downstream of the feedwater valve</p> Signup and view all the answers

    What is the purpose of locking isolation valves in the open position in high-pressure steam boilers?

    <p>To ensure the valves are fully open during operation</p> Signup and view all the answers

    What is the primary purpose of performing plant rounds?

    <p>To observe changing conditions during maintenance and ensure safety</p> Signup and view all the answers

    What is the purpose of partially closing the gauge glass isolation valves of the safety ball check type?

    <p>To prevent the check ball from seating</p> Signup and view all the answers

    What is the purpose of checking the pressure drop across the coalescing filter in the air dryer?

    <p>To determine if the filter is not plugged</p> Signup and view all the answers

    What should be done with unidentified materials found in the boiler room during housekeeping?

    <p>Segregate them for safe disposal</p> Signup and view all the answers

    Why is it essential to ensure the gauge glasses are stored in a safe place?

    <p>To ensure the gauge glasses are not damaged</p> Signup and view all the answers

    Why is it important to check the electrolyte levels in the standby generator's batteries?

    <p>To ensure the battery charger is working correctly</p> Signup and view all the answers

    What is the purpose of observing the pressure drop across the coalescing filter in the air dryer?

    <p>To determine if the filter is not plugged</p> Signup and view all the answers

    What is the recommended action to take when the air inlet on the air compressor is found to be obstructed?

    <p>Clean the air inlet to ensure proper airflow</p> Signup and view all the answers

    What is the primary purpose of conducting housekeeping during routine rounds in the boiler room?

    <p>To promote a safe work environment by looking for spills and leaks</p> Signup and view all the answers

    What is the recommended action to take when the block heater is not operating in the standby generator?

    <p>Ensure the block heater is operating</p> Signup and view all the answers

    What is the recommended frequency of checking the boiler flame failure detection systems?

    <p>Weekly</p> Signup and view all the answers

    What is the purpose of simulating a flame failure condition during the testing of flame safeguard devices?

    <p>To identify potential safety issues with the boiler</p> Signup and view all the answers

    What should be consulted when testing and maintaining safety limit controls on a boiler?

    <p>The operating manual supplied by the boiler manufacturer</p> Signup and view all the answers

    What is the purpose of closing the main burner test firing valve during the testing of flame safeguard devices?

    <p>To simulate a flame failure condition</p> Signup and view all the answers

    What is the recommended procedure for testing flame safeguard devices according to ASME BPVC VI?

    <p>By simulating a flame failure condition</p> Signup and view all the answers

    Why is it important to schedule safety checks during a time when they will not adversley affect the operation of the facility?

    <p>To minimize the disruption to the facility's operations</p> Signup and view all the answers

    What is critical for consistent main burner ignition?

    <p>Correct ignition sequencing</p> Signup and view all the answers

    What happens when the pilot burner shuts off after the main flame trial for ignition period?

    <p>The main safety shut-off valve de-energizes</p> Signup and view all the answers

    What is the recommended maintenance for programmed combustion control?

    <p>Occasional blowing out of accumulated dust</p> Signup and view all the answers

    Why is it important to ensure the scanner tube has adequate air supply?

    <p>To prevent overheating of the scanner</p> Signup and view all the answers

    What is the typical lifespan of an ultraviolet flame scanner?

    <p>40,000 hours</p> Signup and view all the answers

    What happens when the scanner is exposed to ambient light and it fires excessively?

    <p>It needs to be replaced</p> Signup and view all the answers

    What is the recommended frequency for testing the low gas pressure cut-off switch?

    <p>Monthly</p> Signup and view all the answers

    What is the purpose of testing the high gas pressure cut-off switch?

    <p>To check the safety shut-off valves</p> Signup and view all the answers

    Why is it important to check the flame rods regularly?

    <p>To ensure they are not warped due to heat</p> Signup and view all the answers

    What is the purpose of cleaning the scanner lens?

    <p>To ensure the scanner is free from obstructions</p> Signup and view all the answers

    What is the recommended action when the pilot burner test firing valve is closed?

    <p>Close the main burner test firing valve</p> Signup and view all the answers

    How long should the safety shut-off valve take to close in a gas burner with an electronic flame rod?

    <p>Four seconds or less</p> Signup and view all the answers

    What is the purpose of the post-purge and safety shut-down/lockout in the programmed combustion control?

    <p>To indicate a flame failure response</p> Signup and view all the answers

    What should be done when the pilot burner test firing valve is closed and the pilot safety shut-off valve does not close?

    <p>Check the pilot burner for proper operation</p> Signup and view all the answers

    What is the primary purpose of checking the safety shut-off valve in a gas burner with an electronic flame rod?

    <p>To verify the safety shut-off valve closes within four seconds or less</p> Signup and view all the answers

    What is the recommended action when the oil solenoid valve (safety shut-off valve) does not close within four seconds or less?

    <p>Check the oil burner for proper operation</p> Signup and view all the answers

    What is the purpose of covering the scanner in a gas burner with an electronic flame scanner?

    <p>To simulate a flame failure response</p> Signup and view all the answers

    What is the indication of a flame failure response in a gas burner with an electronic flame rod?

    <p>The safety shut-off valve closes within four seconds or less</p> Signup and view all the answers

    What is the recommended procedure when the main burner test firing valve is closed and the pilot burner test firing valve is also closed?

    <p>Start the boiler programmed combustion control</p> Signup and view all the answers

    What is the purpose of the pre-purge period in the programmed combustion control?

    <p>To purge the combustion chamber</p> Signup and view all the answers

    Why is it recommended to develop approved, safe, site-specific procedures for testing airflow proving switches?

    <p>To avoid explosive fuel-rich furnace conditions</p> Signup and view all the answers

    What is the primary purpose of performing safety and safety relief valve tests?

    <p>To ensure the valve is functioning properly to prevent boiler damage</p> Signup and view all the answers

    Why is a manual try lever test performed on a safety valve?

    <p>To ensure the valve is free to operate under pressure</p> Signup and view all the answers

    What is a critical consideration when performing a manual try lever test on a power boiler in steam service?

    <p>The boiler pressure must be at least 35 kPa</p> Signup and view all the answers

    Why is it essential to clear the area near the safety valve before conducting a manual try lever test on a power boiler in steam service?

    <p>To avoid steam overflow into the operating area</p> Signup and view all the answers

    What is the recommended frequency of performing a pop test on a safety valve?

    <p>Annually, prior to removing the boiler from service</p> Signup and view all the answers

    What is the purpose of the ASME BPVC VI and VII guidelines?

    <p>To outline the minimum frequency of safety valve checks</p> Signup and view all the answers

    Why is it important to perform a manual try lever test prior to performing a pop or accumulation test on a safety valve?

    <p>To establish that the valve is free to operate under pressure</p> Signup and view all the answers

    What is the critical aspect of safety valve testing that the manual try lever test does not determine?

    <p>Whether the valve will open at its set pressure</p> Signup and view all the answers

    What is the recommended course of action if the safety valve continues to simmer after operating the try lever two or three times?

    <p>Repair the valve by an authorized valve repair agency</p> Signup and view all the answers

    What is the indication of a leaking valve when the boiler is shut down?

    <p>Increase in water level with the make-up closed</p> Signup and view all the answers

    What is the recommended frequency for dismantling and inspecting low water cut-offs, pump controls, and water feeders?

    <p>Annually</p> Signup and view all the answers

    What is the purpose of checking the insulation on all wiring during annual maintenance?

    <p>To check for any deterioration and replace if necessary</p> Signup and view all the answers

    What is the correct procedure for testing the high-pressure cut-off control?

    <p>Place a test lead across the terminals of the operating cut-off control and restore power to the controls</p> Signup and view all the answers

    What is the purpose of conducting a pop test on a safety valve?

    <p>To check the valve's ability to open and close at the set pressure</p> Signup and view all the answers

    What is the purpose of observing the cut-in and cut-off pressures during routine boiler monitoring?

    <p>To compare the operating parameters to the expected range</p> Signup and view all the answers

    What should be done before performing a pop test on a safety valve?

    <p>All of the above</p> Signup and view all the answers

    What is the recommended action if the safety valve fails to open at the required pressure during a pop test?

    <p>Shut off the burner and slowly release the steam pressure</p> Signup and view all the answers

    What is the expected response of the high-pressure cut-off control during testing?

    <p>It should shut down the firing equipment when the steam pressure reaches the set point</p> Signup and view all the answers

    What is the ASME BPVC tolerance for the set pressure of a safety valve?

    <p>Plus or minus 2 psi</p> Signup and view all the answers

    What is the typical blowdown of a safety valve, as specified in the ASME BPVC?

    <p>2 psi to 4 psi</p> Signup and view all the answers

    What is the purpose of evaluating the safety valve's performance against the ASME BPVC criteria?

    <p>To determine if the valve needs to be replaced or repaired</p> Signup and view all the answers

    When should a pop test be performed on a safety valve?

    <p>During annual maintenance</p> Signup and view all the answers

    What is the purpose of installing a temporary jumper lead during a pop test?

    <p>To bypass the operating control and high limit control</p> Signup and view all the answers

    What is the recommended frequency for performing a pop test on a safety valve?

    <p>Annually</p> Signup and view all the answers

    What is the purpose of recording the opening and reseating pressures of a safety valve during a pop test?

    <p>To verify the valve's ability to open and close at the set pressure</p> Signup and view all the answers

    What is the purpose of the float chamber blowdown test?

    <p>To discharge sediment from the base of the float chamber</p> Signup and view all the answers

    How often does ASME CSD-1 recommend performing the float chamber blowdown test for power boilers?

    <p>Daily</p> Signup and view all the answers

    What should be done if the low water cut-off proves defective during testing?

    <p>Remove the boiler from service until the low water cut-off is repaired or replaced</p> Signup and view all the answers

    What is the purpose of the slow drain test?

    <p>To confirm that the boiler trips at no lower than the lowest visible part of the gauge glass</p> Signup and view all the answers

    What is the recommended frequency for performing the slow drain test?

    <p>Semi-annually</p> Signup and view all the answers

    What is the purpose of monitoring the boiler water level closely during testing?

    <p>To prevent damage to the boiler or low water cut-off mechanism</p> Signup and view all the answers

    What is the purpose of the feedwater control in a steam boiler?

    <p>To control the operation of the boiler feed pump</p> Signup and view all the answers

    What should be done after testing the low water cut-off mechanism?

    <p>Reset the low water cut-off mechanism</p> Signup and view all the answers

    What is the purpose of marking the levels at which the feedwater system starts and stops on the gauge glass?

    <p>To check for possible level control problems</p> Signup and view all the answers

    What is the purpose of checking the make-up valve in a combined feeder/cut-off control?

    <p>To ensure that the make-up valve opens and closes properly</p> Signup and view all the answers

    What is the maximum tolerance for the set pressure of a safety valve according to ASME BPVC I, Part PG-72.2?

    <p>Plus or minus 2% of the set pressure</p> Signup and view all the answers

    What is the minimum blowdown required for a pressure relief valve according to ASME BPVC I, Part PG-72.1?

    <p>2 psi (15 kPa) or 2% of the set pressure</p> Signup and view all the answers

    What is the purpose of an accumulation test?

    <p>To verify the installed valve capacity is sufficient</p> Signup and view all the answers

    What is the acceptable pressure rise during an accumulation test for a power boiler in steam service?

    <p>6% above the highest pressure at which any valve is set</p> Signup and view all the answers

    What is the purpose of a low water cut-off test?

    <p>To ensure the boiler shuts off when the water level is low</p> Signup and view all the answers

    What is the recommended frequency for conducting low water cut-off tests?

    <p>As recommended by ASME CSD-1</p> Signup and view all the answers

    What is the maximum allowable pressure rise during an accumulation test for a heating boiler in steam service?

    <p>5 psi (35 kPa) above the maximum allowable working pressure</p> Signup and view all the answers

    What is the purpose of ASME BPVC I, Part PG-67.2?

    <p>To specify the pressure relief valve capacity for power boilers</p> Signup and view all the answers

    What is the purpose of ASME BPVC IV, Part HG-512?

    <p>To specify the pressure relief valve capacity for heating boilers</p> Signup and view all the answers

    What is the minimum requirement for the pressure relief valve capacity of a power boiler?

    <p>To discharge all the steam that can be generated by the boiler without allowing the pressure to rise more than 6% above the highest pressure at which any valve is set</p> Signup and view all the answers

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