P99 low pressure boilers

P99 low pressure boilers questions and verified answers (detailed & elaborated) ACTUAL EXAM 2025 TESTS!!

If a baffle breaks, what happens? increase of furnace gases and stack temperature When would a high suction line be used in a fuel tank? when there is sludge or water in the tank ____________ must be performed annually, if not, it can cause a catastrophic event. full boiler inspection The science of heating and cooling with water (as the conveying method) is called _________________. hydronics What is the most common cause of cast iron boiler failure? cracking What is the most common c...

When burning No.6 fuel oil, the strainers should be cleaned at least once every _____ hours. 24 When cleaning a fuel oil strainer, the ____ must be carefully replaced to prevent air from entering the system. gasket The ____ pump draws fuel oil from the fuel oil tank. fuel oil The _____ valve protects the fuel lines and pump from excessive pressure. relief A high vacuum on fuel oil suction gauge normally indicates ________ . cold fuel or a dirty strainer Fuel oil burners are designed to...

Boiler fittings are components attached directly to the boiler. True Safety valves on steam boilers are designed to open slowly. False The safety valve should chatter to prevent damage to the disc. False Safety valves are tested only by performing a try lever test. False A safety valve try lever test is performed with the boiler at 15 psi or higher. False The steam pressure gauge must be connected to the highest part of the steam side of the boiler. True A siphon is connected between...

Boiler water treatment is required for makeup water introduced to the boiler. True Slug feeding is used to generate foam to prevent carryover. False Dissolved solids are impurities such as calcium, silica, and iron dissolved in solution. True Priming and carryover can lead to water hammer and possible pipe rupture. True Oxygen in the boiler water is used to remove non-adhering sludge. False Water that contains a small quantity of minerals is hard water. False Chemicals added to the b...

Hot water heating systems produce heat more consistently than steam heating systems. True Hot water heating systems require less water than steam heating systems. False The natural circulation hot water heating system uses circulating pumps to transport water in the system. False Water becomes less dense as it is heated. True The natural circulation hot water heating system uses a compression tank to absorb pressure changes. False Natural circulation hot water heating systems are commo...

Boiler main steam stop valves should be ____ valves. gate Gate valves should always be _____ or _____ closed. Wide open; completely All boilers in battery must have two main steam stop valves or one main steam stop valve and one ______ . automatic nonreturn valve When open, an os&y gate valve offers ______ to the flow of steam. no resistance Steam traps are _____ devices. automatic ______ allow movement caused from the heating and cooling of steam lines. Expansion bends Steam traps r...

When burning No.6 fuel oil, the strainers should be cleaned at least once every _____ hours. 24 When cleaning a fuel oil strainer, the ____ must be carefully replaced to prevent air from entering the system. gasket The ____ pump draws fuel oil from the fuel oil tank. fuel oil The _____ valve protects the fuel lines and pump from excessive pressure. relief A high vacuum on fuel oil suction gauge normally indicates ________ . cold fuel or a dirty strainer Fuel oil burners are designed to...

The water in a boiler is heated, turns to steam, and leaves the boiler through the ______________ . main steam line When steam releases heat in the heat exchanger, it turns to ______________ . condensate What type of pump returns condensate from the system back to the boiler? vacuum What valve allows the flow of water in one direction? The check valve The feedwater _________ valve should be located as close to the shell of the boiler as practical. stop A ________ after each heating uni...

What is necessary to generate steam in a boiler? A container, water and heat. What part of the boiler has water on one side and heat on the other? The heating surface. What type of boiler has heat and gases of combustion that pass through tubes surrounded by water? A fire-tube boiler. What type of boiler has water in the tubes and heat and gases of combustion passing around the tubes? A watertube boiler. What is used in boilers to direct the gases of combustion over the boiler heating su...