Fdny p-99 c of f Exam QUESTIONS WITH COMPLETE 100% VERIFIED SOLUTIONS 2024/2025, Exams of Safety and Fire Engineering

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Fdny p-99 c of f Exam QUESTIONS

WITH COMPLETE 100% VERIFIED

SOLUTIONS 2024/

What is a general requirement of the location of the installation of a boiler? Adequate clearance from combustile construction What temperature must the materials remain under during combustion? 170 degrees What is a requirement for the access of the boiler? Access for operation and maintenance must not be hazardous What is required upon installation to operate a boiler? Inspection and test resulting in equipment use permit from commissioner How often should a boiler be inspected? Once a year What documentation is required from a certificate holder? Owners annual statement What is required to hydrostatically test upon installation and who should perform these tests? Liquid fuel piping and fuel oil storage tanks by the installing contractor At what pressure should piping be tested? 1/2 max working pressure but less than pressure required for storage tank At what pressure should oil storage tanks be tested? At 1 1/2x max working pressure but never < 25 psi How long should hydrostatic pressure be maintained? Until all joints and connections are inspected for leaks and at 30 minutes have passed Who is responsible for testing gas distribution piping? Installing contractor before closing and operation What is described on instruction cards and where are they located? Care and operation of oil burner located near the equipment. What type of burners require a C of F holder to operate them? Any boiler that is not automatic or requires preheating. What is the license holder responsible for after repair? Inspecting the repairs, and functioning of all control devices and positioning of valves. What type of heat and combustion equipment are required with the air pollution control code? All burners fire with solid, liquid, or gas. Including rubbish burners/incinerators. What temperature are the products of combustion upon exit in low temperature equipment?

Less than 600 degrees What temperature are the products of combustion upon exit in medium temperature equipment? 6001000 What temperature are the products of combustion upon exit in high temperature equipment? 1000+ How much cfm of air be capable of per gallon of oil per hour? 36 cfm If ventilation is supplied mechanically, what is required of the pressure? It must be greater than the atmospheric pressure outdoors How are flue dampers designed? So that they cannot completely cut off passage of flue gasses at any time When can tight closing dampers be installed? When accompanied by approved automatical draft and combustion controls. What is the minimum flashpoint for fuel oils to mean hydrocarbon oils? 100 degrees What type of oils should be used in low pressure burners? No. 1(range oil), no. 2(diesel oil), no. 4, no. 5, no. 6 What oil is prohibited? Crank case refuse oil What is required of the size of overflow pipes? They should at least be the same size as supply pipes Where should a relief valve be installed? In the discharge line between the pump and the first shut off valve How is oil heated in storage tanks? Coils using low pressure hot water/steam or approved electric heaters. Where are shut off valves required? One at the supply line at the tank and and one at the supply line at the burner What stops the flow of oil? Remote control Where is the remote control located? As close to the entrance of the boiler room as practical or immediately inside as long as it's accessible at all times. On tank if 60 gal or less What are the 4 safety controls implemented? Oil temperature control, ignition, stack/combustion control, and high pressure and temperature control. Is a chimney required to install a burner? Yes What temperature is no. 6 oil heated to in the tank?

100 - 130 degrees What does excessive readings in the vacuum gauge indicate? Obstruction in the the suction line, strainer must be cleaned What temperature do preheaters further heat the oil to? 160 - 180 degrees When will the main fuel valve shut down the burner? When there's a failure of ignition or combustion What is the purpose of the oil return line? To circulate oil that hasn't been atomized back into storage When is the back pressure relief valve necessary? When the pressure in the burner is too great What is normal pressure during combustion of no. 6 oil? 30 - 50 psi What is combustion and what is the result? The chemical union of oxygen in the air and combustible elements in oil (hydrogen and carbon). The result is heat energy. What percent of oil is carbon? 85% What percent of oil is hydrogen? 14% Can oil burn? Why or why not? No it is a liquid fuel and must be changed into a gas or vapor to burn What process must take place before oil is burned? Vaporization/Atomization At what pressure is the oil and air mixture delivered to the nozzle? 1 - 15 psi What is air that contacts the oil before it leave the nozzle called? Primary air How much air do burners require per gallon of oil burner? 2000 cubic feet When properly performed, how much heat is produced for each pound of carbon? 14,544 BTV When incompletely performed, how much heat is produced per pound of carbon burned? 4,480 BTV What color is the flame of of a complete process of combustion? Orange body with red, slightly cloudy tips What is indicated when the flame is red and smoky?

Lack of oxygen What is indicated when the flame is white and dazzling? Excess air What can be a result of insufficient air supply? Dense, black smoke and soot What can happen to the flame of there is an excess air supply? The flame can go out What will happen if oil and air mixture contacts walls of combustion chamber? Will cause a smoky fire, which leads to carbon build up on walls and burner failure What is reflected heat? Heat that is channeled back to combustion chamber to maintain fire after the ignition is turned off. At what temperature is oil stored at? Just above 100 degrees What temperature is fuel raised to before entering combustion chamber? 180 degrees What can lead to after drip? A defective oil cut off valve, allows oil to drip into combustion chamber while burner is off. Carbon build up. What leads to oil leaking on the floor in front of the unit? A bad seal on the oil pump shaft How often should nozzles and rotary cups be cleaned on a no. 6 oil burner? Daily What will cause boiler room to be filled with smoke? Blockage in the chimney or flue passage What will water in fuel oil cause? Improper atomization What is the most common cause of a puff back? A delay in ignition What is the purpose of a protective relay? To shut down burners if a flame is not established quickly What can happen if a combustion chamber is not preheated? Oil burner system gets filled with vaporized oil fumes. Indicated by strong odor Where is fuel oil stored? In oil storage tank What is the purpose of the tank shut off valve? Stop the flow of oil for purpose of maintenance or emergency What is an oil strainer?

The oil strainer prevents sediment and dirt in oil from storage tank from entering combustion chamber What is the vacuum gauge for? To indicate whether there is an obstruction in the suction line What is the purpose of the preheater? To raise temperature of oil for efficiency in pumping and atomization What is the main fuel valve? An electrically operated valve that will open or close the line leading to the atomizer. Why is the main fuel valve located as close to the burner as possible? To minimize the amount of oil remaining in the burner line in case of an emergency shut off. What device atomizes or breaks up the oil? Atomizing cup or spinner When will the vaporstat shut down the burner? When there is no air being provided in the process of combustion What is the mixture of fuel and air ignited by? Gas pilot or electric ignition When does the photoelectric cell shut down the boiler? When there is no flame present in the combustion chamber What is the purpose of the aquastat? It operates the oil burner in the summer for domestic hot water needs What safety mechanism shuts down the burner when there is insufficient water levels? The low water cut off What does the gauge glass indicate? The water levels in the boiler What is the primary control of the burner? The stack switch, triggered when there's no bear in the smoke stack When does the smoke alarm sound? When there's excessive smoke or an improper fire What is normal pressure for a low pressure boiler to read on the boiler steam pressure gauge? Less than 15 psi What is used to relieve excess steam pressure? The safety valve or pop off valve When does the pressuretrol shut down the burner? When desired preset steam pressure is met in order to prevent excess pressure When is the manual pressuretrol used? When the pressuretrol fails to turn off the boiler when steam pressure levels are too high