boiler maker question and answers
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| When are steel chain slings recommended | when rigging from 3 points
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| a big control valve is pulled. who is responsible for the rigging | crane operator and rigger
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| what should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD WT pipe | 4 legged roller top jacks
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| the hitch made by wrapping the sling around the load, then passing one eye of the sling trough a shackle is called | choker hitch
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| when should rigging material be attached to a beam that is being demolished | before any bolts are removed or any cutting is done on the beam
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| which of the following has a greater possibility of being a respiratory hazard | asbestos
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| which type of insolation is required before a vessel is entered | locking, tagging, and blinging lines that feed the vessel
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| according to OSHA oxygen and acetyle cylinders in storage must be separated what minimum distance | 20 feet
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| what is the first thing a boler maker should do before cutting into a tank or vessel | determine the content
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| scales on a drawing are usually written in | inches and feet
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| dimensional measurements can be found on all of the following except | mechanical flow diagram
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| all vessels elevations are taken from the | top of steel on the embed rings (base plate)
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| a gate valve is being removed from a product line. all of the following procedures must be performed except | valve must be in closed position
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| what is a spud wrench most commonly used for | aligning flanges
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| what type of valves are typically used on a s sight glass to direct flow | way valves
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| handhole cap and plug material is verified by the | P4 report
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| what are the four major components of a gate valve | body, bonnet, gate, and steam
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| what is the most commonly used fasteners in boiler construction | threaded
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| on site who determines what grade of material to be used for repair | QA/AC
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| what is the best tool to be used to "prepare" XXH2-INCH tubing for welding | milling motor
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| all of the following tools are used in preparation of the butt weld of a tube except | chipping gin
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| what preparations must be made for the spring can hangers of a section of a pipe before hydrotesting can be done | no preparation must be made
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| which of the following connecting units are used on pipe hangers | eye bolts, turnbuckels, threaded rods
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| which of the following materials may be used to safely secure scaffold boards to a platform | #9 tie wire
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| for high temperature service, one end of a stud should be | marked B16
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| How should bolts on an 8-bolt flange be tightened | in a cross-over pattern
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| what is the primary reason for high-point vents in hydrotesting | to purge air pockets
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| what are the most commonly used fasteners | threaded bolts
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| whey must spring cans be adjusted after they are put into service | because the lines become heavier when they are in service
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| variable spring-can supports should be used on what type of piping | piping that must be supported at all times during thermal expansion and contraction
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| which of the following fasteners is used on concrete | expansion anchor bolt
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| after installation of a variable pipe support, a boilermaker should verify the | proposed length of travel has no obstruction
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| how should tubes be attached in drum holes | rolled
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| which of the following is most important when fitting up thick wall boiler tubing | the inside diameter must match up
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| what should be used to plug a tube at either end of a well to prevent air circulation | purge pager
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| what should be done before furnace fittings for tube replacements are ground | the inside of the fitting should be inspected
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| a reboiler in a tower is being hydrotested. the water should be at what level | above the reboiler
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| what is the preferred socket for tray work | 12 point
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| how many types of bubble caps are there | 6
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| why does a boilermaker use a test tree that has a bleed valve when hydrotesting an exchanger | so tht the pump can be disconnected
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| what determines the type of bolts to be put back in an exchanger so that it can be bolted back together | the service of the exchanger
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| what type of exchanger needs only one end open for plugging tubes | harpin
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| the tube-to-tube sheet joint achieved by mechanical or explosive expansion of the tube hole in the tube sheet is the | expansion joint "J" factor
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| what type of tank has legs on the roof | floating roof
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| what information is required to locate a nozzle that will be installed on a vessel shell | the elevation and degree of the centerline of the nozzle
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| the variable spring on a sring-type hanger should be adjusted to what position before the pipeline is put into service | cold
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| all of the following, are possible reasons for a spring can over-loadin except | incorrect orientation of the support
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| what problems are associated with tube rolling | improper expanding and depth
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| why is a monel gasket used in HF acid piping | because of its high resistance to acid
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| which of the following is required when test blinds are installed | longer bolts
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| which of the following are used to prevent tubes from sagging because of weight | baffles
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| what is the area of a concrete slab that is 25 feet 6 inches long and 10 feet wide | 255 square feet
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| which gas passes through the center in a cutting torch tip | oxygen
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| add the following fractions and reduce to the lowest common denominator (24 5/8 + 13 15/16 +8 1/4) | 46 13/16
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| on a blueprint, 1/4"=1' means | 1 inch on the drawing equals 1 foot of actual size
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| a major component of a tower is a | downcomer
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| what is indicated by the notation "3-inch, 150#" on a isometric drawing | 3-inch diameter, 150# flange
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| what is the preferred type of rigging material used to lift coated pipe | nylon slings/straps
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| the best source for information about welding on a tube is the | QA/QC
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| equal-width grating panels are being unloaded on the job site. one piece measures 4 1/2 ft in width. there are 7 panels. what is the total width when all the panels are laid side by side | 31 1/2
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| what is the demister pad used for | filtering chemical/vapors
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| who is responsible for blocking valves that isolate a reboiler before work is begun | operations
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| the channel head cover on an exchanger is used on the | tube side
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| what type of steel beams are attached to the furnace wall with clips to contain a boilers horizontal expansion | buckstays
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| who determines the size and type of sring can to be used | engineer
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| how many bolts must be removed so that a 3-inch, 150# flange can be hot bolted | 0
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| how often must entry permits be updated during normal working hours | at the end of each shift change
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| all of the following would be reasons for rejecting a synthetic sling for rigging except | an identification tag on the wrong side of the sling
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| tube expanding is a method of | connecting
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| why should a full port valve be used for a corrosion probe | so the probe will not corrode the valve
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| what is "back gouging" | removing metal from the other side of a welded joint
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| what type of purge must be maintained when a catalyst is removed from a reactor | nitrogen
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| where should the shell side gasket on the new tube bundle be installed | over the floating head end of the tube bundle, before the bundle is put back in the exchanger
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| chain hoist are primarily designed for what type of lifting | vertical lifting
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| what type of valve is used on a hydro test tee to maintain test pressure after the hydro has reached its required pressure | check
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| if the sling angle decreases, sling stress | increases
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| what substance is resistant to oil and solvent but has poor resistance to chemical | neoprene
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| a reboiler in a tower is being hydrotested. the water should be at what level | above the reboiler
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| what type of drawing shows the precise dimensions of a section or part of the larger plan | scale
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| a worker is installing a blind in a flange for blanking off the gas line to the burners. the appropriate gasket cannot be found. what should the worker do | do not continue installing the blind until the proper gasket is located
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| what is the most commonly used light lifting device | chain hoist
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| why should a boilermaker "crack" the cylinder valve before connecting the regulator to the oxyacetylene cylinder | to clean the cylinder valve of foreign matter
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| what is one way to permanently support a pipe in a pipe rack | with shoes
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| which type of drawing would normally be used to fabricate a spooled piece of pipe | isometric
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| which row of fractions is in the correct numerical order | 1/8, 3/16, 1/4, 5/16, 3/8, 7/16
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| what is the typical procedure to install tubes in a steam drum | tig welding
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| what must be locked out before a tube can be removed safely from the reboiler | feed water pumps
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| how many people can tie-off to a vertical lifeline | a maximum of two people
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| what is the name of the heated interior of the boiler | fire box
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| the maximum fillet size on a tube to drum seal welds should be | 3/8 inch
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| what is meant by "overheating" a metal with an oxyacetylene torch | heating to a temperature that imapairs the metal
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| thermocouples are used for | indicating the temperature of the metal to which is attached
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| what size generating tube stock is permitted inside the steam and mud drum of a boiler | 1 1/2 to 2 inch
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| what are the first two blinds turned on a tower being taken out of service | inlet and outlet
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| what tubes run vertically in a furnace | rediant
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| on an open root weld on plate, the combined grooved angle of the bevled | 30 degrees
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| what is meant by the letters "RFWN" | Raised Face Weld Neck
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| a boiler maker is installing trays in a tower. where should the weird plates be installed | between the trays
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| where is the convection section of a heater located | above the radiant tubes
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| a leak in a fin fan is being repaired while hydrtesting is being conducted on a piping system. what should be done during the repair | pressure should be relieved before any tightening is started
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| the channel head cover on an exchanger is used on the | tube side
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| where is the demister pad usually located | top of tower
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| what can be used in place of a shackle pin | nothing
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| what are the 3 types of basic hitches | vertical, choker, basket
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| what are lifting lugs | rigging material used to clamp onto surfaces such as shell plates or sheet metal
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| what is the primary purpose of a P&ID | provides scale drawings of piping and instrumentation control systems
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| eye bolts, anchor bolts, and self taping bolts are all types of | fasteners
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| how much is 3 inches in hundredths of a foot | 0.35
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| how is a plate dog used | it buffers to align vertical plates at the weld
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| why are there ball checks on sight glass valves | to stop the flow if there are leaks or if the sight glass breaks
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| what type of gasket is usually used when a steam service drum is blinded | garloc
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| pack beds are bound in all of the following location except in | furnaces
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| the length of a rectangle is 8 feet 6 inches and the width is 4 feet 7 inches, what is the perimeter | 26 feet 2 inches
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| what is the proper way to attach two slings together | use a shackle
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| what is a "Rosebud" normally used for | heating metal
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| which of the following characteristics of a gasket must be checked before the casket is installed in a flange | material
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| how should a boiler maker determine the proper size gasket to install in a set of flanges | check the size and rating stamped on the flanges
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| wht type of gasket is normally used on a flange valve in a high-pressure/high temperature line | flexitallic spiral wound
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| a boiler maker who is hydrotaticaly testing an exchanger should have which of the following information | the correct test pressure
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| when an exchanger is blinded, spaces are used | to space open the exchanger side for steaming or nitrogen purge
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| when an exchanger tube is plugged, whey is the tube cut before the second plug is installed | to prevent pressure build up
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| when performing a welding repair, you must have a copy of what on hand | the quality assurance manual
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| rigging is to be done with wire sling over a steel beam. when is a softener required | at all times
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| where can the pass partition of an exchanger be found | on the channel head
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| a reinforcement pad is used on the shell of a vessel to | strengthen nozles and manways
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| what tool is typically used to remove hole caps from a stainless steel header | ARC gouger
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| where is the exchanger blinded during a tubeside pressure test | on the channel head flanges
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| what is the value of "Pi" | 3.142
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| what is the sum of 3 7/8 + 2 5/8 + 3/16 | 6.375
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| what is the difference in elevation between a point at 14 feet 1/8 inch and a point at 11 feet 1 3/4 inches | 2 feet 10 3/8 inches
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| the most commonly used wrench size for tray work is | 9/16 inch
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| what minimum number of bolts must be removed when an 8 inch 300# slip blind is blinded | 5
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| what information is found on the exchanger nameplate | exchanger operating pressure
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| what component must be removed before a u-tube bundle can be removed | channel head
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| a boiler maker is hydro testing an exchanger and finds that a tube is leaking, what should the boiler maker use to stop the leak | plugs
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| what wrench size is required to tighten a nut on a 7/8 inch heavy hex head bolt in a flange | 1 7/16 inches
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| a boiler maker must have all of the following when working inside a vessel except | a flange spreader
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| a pipe will be lifted with wire rope slings, which of the following techniques should be used | use a double wrap on the choker to prevent the choker from sliding on the pipe
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| what should be used to secure a socket to an impact wrench | retainer rings
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| a pressure differential hydro test on an exchanger is one | that is different when fire water is used on the shell and a hydro pump is used on the tubes
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| what is the total length of 4 1/16 inches, 5 1/8 inches, 2 3/4 inches, and 7 3/8 inches | 19 5/16 inches
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| 1ft 3 3/4 in + 2ft 1 1/16 in + 5ft 10 7/8 in | 9ft 3 11/16 in
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| a cylindrical tank is 10 ft high and 7 ft in diameter, what is the approximate volume of the tank | 385.0 cubic feet
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| what tool is used to stop leaks on the tube sheet of exchangers | rolling motor
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