NCCR Boilermaker Practice Test

These questions are part of the practice quiz. Start practicing

• Compute the sum of 5 1/8 inches and 2 3/4 inches.
• In a pipe rack, which feature provides permanent support for piping?
• What type of gasket is normally used on a flange valve in a High-Pressure/ High-Temperature line?
• Slip blinds must be thicker than 3/8 inch under which condition when an exchanger is blinded off?
• What is indicated by the notation '3-inch, 150#' on an isometric drawing?
• What is the preferred socket size for tray work?
• Why are there ball checks on sight glass valves?
• When an exchanger is blinded, spacers are used to space open the exchanger side for steaming or nitrogen purge. What is the purpose?
• Which component is a steel beam attached to the furnace wall to accommodate a boiler's horizontal expansion?
• How is a plate dog used?
• What unit is used for volume in this problem set?
• If the sling angle decreases, what happens to sling stress?
• What should be used to plug a tube at either end of a well to prevent air circulation?
• Scales on a drawing are usually written in?
• What is used to plug a tube at either end of a well to prevent air circulation?
• What size generating tube stock is permitted inside the steam and mud drum of a boiler?
• Which device is most commonly used for lifting light loads in boiler shop operations?
• What is the sum of 3 7/8+ 2 5/8 + 3/16
• When are steel chain slings recommended?
• Thermal beveling of pipe in preparation for welding requires the use of which tool?
• Which scenario presents the highest risk of respiratory hazard?
• During catalyst removal from a reactor, which purge gas is used to prevent oxidation?
• What is the proper way to attach two slings together?
• A leak in a fin fan is being repaired while hydrotesting is being conducted on a piping system. What should be done during the repair?
• What is meant by overheating a metal with an oxyacetylene torch?
• The size and type of spring can used is determined by whom?
• What type of tank has legs on the roof?
• The pass partition of an exchanger is typically located on which component?
• When a steam service drum is blinded, which gasket type is usually used?
• What marking is specified on studs for high-temperature service?
• What size generating tube stock is permitted inside the steam and mud drum of a boiler?
• A reinforcement pad is used on the shell of a vessel to
• Which fastener is used on concrete?
• Chain hoists are primarily designed for what type of lifting?
• During hydrostatic testing of an exchanger, which information is essential to determine the test procedure?
• A cylindrical tank is 10 ft high and 7 ft in diameter. What is the approximate volume?
• Eye bolts, anchor bolts, and self tapping bolts are all types of?
• What tubes run vertically in a furnace?
• 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?
• What is the minimum distance between oxygen and acetylene cylinders in storage per OSHA?
• On an acetylene rig, what does a grooved nut indicate?
• Add the following fractions and reduce to the lowest common denominator: 24 5/8 + 13 15/16 + 8 1/4?
• What are the most commonly used fasteners?
• What is the preferred type of rigging material used to lift a coated pipe?
• Why must spring cans be adjusted after they are put into service?
• What is the most commonly used fasteners in boiler construction?
• Compute the sum of 4 1/16 inches and 7 3/8 inches.
• What is the area of a concrete slab that is 25 feet 6 inches long and 10 feet wide?
• What two measurements define the position of a nozzle on a vessel shell?
• MTW in boiler tubing stands for what?
• In an isometric drawing, the notation '3-inch, 150#' most likely describes which feature?
• All of the following tools are used in preparation of the butt weld of a tube except?
• What must be locked out before a tube can be removed safely from a reboiler?
• Which of the following is a type of insulation used inside furnaces?
• A boiler maker must have all of the following when working inside a vessel except
• The variable spring on a spring-type hangar should be adjusted to what position before the pipeline is put into service?
• On site, which group determines the material grade to be used for repair?
• A boilermaker is installing trays in a tower. Where should the wired plates be installed?
• Which gas passes through the center of a cutting torch tip?
• A pipe will be lifted with wire rope slings. Which technique should be used?
• The channel head cover on an exchanger is used on the tube side.
• What type of bolt was used to anchor the pipe in the illustration?
• Which gasket type is typically used on flange valves in High-Pressure/High-Temperature lines?
• What formula is used to compute the volume of a cylinder?
• Handhole cap and plug material is verified by the
• Which component is not considered one of the four major components of a gate valve?
• Back Gouging involves removing metal from which location relative to a welded joint?
• A reboiler in a tower is being hydrotested. The water should be at what level?
• On site, who determines what grade of material to be used for repair?
• What is the minimum number of bolts that must be removed when an 8-inch slip blind is blinded?
• What can be used in the place of a shackle pin?
• Where can the pass partition of an exchanger be found?
• The hitch made by wrapping the sling around the load, then passing one eye of the sling throughout a shackle is called?
• The tube-to-tube sheet joint formed by mechanical or explosive expansion of the tube hole is known as what?
• A reinforcement pad on a vessel shell is intended to reinforce which parts?
• On a blueprint, 1/4\"=1' means?
• The best source for information about welding on a tube is the?
• What are the three types of basic hitches?
• During boiler maintenance, replacing a failed tube is part of which category of action?
• Which diagram is specifically used to show piping and instrumentation in a plant?
• What is the best tool to be used to prepare XXH 2-inch tubing for welding?
• What is meant by the letters 'RFWN'?
• A channel head cover on an exchanger is used on which side?
• According to OSHA, oxygen and acetylene cylinders in storage must be separated at what minimum distance?
• What is the primary purpose of P&ID?
• On an acetylene rig, what does the grooved nut indicate?
• Which of the following connecting units are used on pipe hangers?
• Why should an acetylene regulator on a cutting rig not be adjusted over 15 PSI?
• During hydrotesting an exchanger, if a tube is leaking, what should the boiler maker use to stop the leak?
• A boilermaker who is hydrostatically testing an exchanger should have which of the following information?
• Who is responsible for rigging when a big control valve is pulled?
• Why should a full port valve be used for a corrosion probe?
• What tool is used to stop leaks on the tube sheet of exchanges?
• What is the primary reason for high-point vents in hydrotesting?
• During catalyst removal from a reactor, which purge gas is used to prevent oxidation?
• Which component of a gate valve provides the housing for the stem and the packing?
• What is a spud wrench most commonly used for?
• Where is the demister pad usually located?
• What preparation must be made for the Spring-Can hangers of a section of a pipe before hydro testing can be performed?
• Which type of exchanger requires only one end for plugging tubes?
• A major component of a tower is a?
• On an open root weld on plate, the combined grooved angle of the bevel is?
• What type of steel beams are attached to the furnace wall with clips to contain a boiler's horizontal expansion?
• Which item is not a fastener?
• What information is found on the exchanger nameplate?
• After installing a variable pipe support, what should a boilermaker verify?
• Which tool is typically used to remove hole caps from a stainless steel header?
• In drawing terminology, a drawing that focuses on a small portion with exact dimensions is typically called what?
• Where should the shell side gasket on the new tube bundle be installed?
• How should tubes be attached in drum holes?
• What is a 'Rosebud' normally used for?
• Why is a Monel gasket used in HF acid piping?
• Who is responsible for blocking valves that isolate a reboiler before work is begun?
• What is the demister pad used for?
• Which of the following is most important when fitting up thick wall boiler tubing?
• If seven equal-width panels have a combined width of 31 1/2 FT, what is the width of one panel?
• Which method is used to attach tubes in drum holes?
• What problems are associated with tube rolling?
• What is the sum of 2 3/4 inches and 7 3/8 inches?
• Which bevel angle is used for an open root weld on plate?
• The maximum fillet size on a tube-to-drum seal weld should be?
• A gate valve is being removed from a product line. All of the following procedures must be performed except?
• Which action should be taken before cutting into a beam scheduled for demolition?
• For fabricating a spooled piece of pipe, which drawing type is normally used?
• How should bolts on a 8-bolt flange be tightened?
• 3 inches in hundredths of a foot equals which value?
• How often must entry permits be updated during normal working hours?
• What type of valve is used on a hydro test tree to maintain test pressure after the hydro has reached its required pressure?
• What action should be taken if a boiler tube fails?
• What should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD WT pipe?
• Before connecting the oxyacetylene regulator, why should the boiler maker crack the cylinder valve?
• Before a wall burner is pulled for inspection, what must be done?
• Pack beds are found in all of the following locations except in which of the following?
• Which of the following are used to prevent tubes from sagging because of weight?
• What is the sum of 4 1/16 inches, 5 1/8 inches, and 2 3/4 inches?
• Which feature characterizes a floating roof tank?
• What is the total length of 4 1/16 inches, 5 1/8 inches, 2 3/4 inches, and 7 3/8 inches?
• How many bolts must be removed so that a 3-inch 150# flange can be hot bolted?
• The location of a nozzle on a vessel shell is determined by which pair of measurements?
• What is the sum of 4 1/16 inches and 5 1/8 inches?
• Which component is commonly used to adjust tension in pipe hangers?
• Which statement best describes lifting lugs?
• What is the primary purpose of high-point vents during hydrotesting?
• What are the four major components of a gate valve?
• The length of a rectangle is 8 Feet 6 Inches and the width is 4 Feet 7 Inches. What is the perimeter?
• If a diameter is 7 ft, what is the radius of the cylinder?
• To locate a nozzle installed on a vessel shell, which information is required?
• What method permanently supports a pipe in a pipe rack?
• The sum 1 ft 3-3/4 in plus 2 ft 1-1/16 in plus 5 ft 10-7/8 in equals which value?
• Which of the following is the decimal result of adding 3 7/8, 2 5/8, and 3/16?
• For high temperature service, one end of a stud should be?
• Who determines the size and type of spring can used?
• Which gas is used as the oxidizer in cutting torch operations?
• When should rigging material be attached to a beam being demolished?
• Which type of insulation is required before a vessel is entered?
• What does a thermocouple primarily indicate in a metal heating setup?
• Rigging is to be done with a wire sling over a steel beam, when is a softener required?
• When performing a welding repair, you must have a copy of what on hand?
• A full port valve is preferred with a corrosion probe for what primary reason?
• Elevation adjustments on the pipe hanger should be made at which point?
• What wrench size is required to tighten a nut on a 7/8-inch heavy hex head bolt in a flange?
• A reboiler in a tower is being hydrotested, the water should be at what level?
• How many types of bubble caps are there?
• Which type of valve is shown as #7 on the iso?
• When an exchanger tube is plugged, why is the tube cut before the second plug is installed?
• On a drawing, what is used to record any changes to the drawing?
• Thermocouples are used to indicate the temperature of what?
• What tool is typically used to remove hole caps from a stainless steel header?
• Which safety measure is required before entering a vessel?
• Before installing a gasket, which two items should be checked on the flange?
• Where is the convection section of a heater located?
• When fabricating spooled pipe, which drawing type is used?
• Which of the following has a greater possibility of being a respiratory hazard?
• What equipment is used to expand tubes inside mud and steam drums?
• Slip blinds thicker than 3/8 inch are required if hydro test pressure exceeds the slip band's rating. Which of the following statements aligns with this rule?
• Which component must be removed before a U-tube bundle can be removed?
• Where should the shell side gasket be installed when mounting a new tube bundle?
• All vessel elevations are taken from the ______.
• What is the most commonly used light lifting device in boiler shop operations?
• Which two blinds are opened first when isolating a tower?
• When preparing to connect a regulator to an oxyacetylene cylinder, which action helps prevent contamination of the valve?
• Which device is used to hold two 40-foot joints of pipe during setup?
• Variable spring-can supports should be used in what type of piping?
• What should be done before furnace fittings for tube replacements are ground?
• What safety pressure limit is recommended for acetylene regulators during cutting?
• Which constant is used in the volume formula for a cylinder?
• 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?
• What should be used to secure a socket to an impact wrench?
• What type of drawing shows the precise dimensions of a section part of the larger plan?
• Which department or document is the most appropriate source for welding procedure information on tubes?
• Buckstays are steel beams attached to the furnace wall with clips to contain a boiler's horizontal expansion.
• In boiler tube maintenance, what devices are used to expand tubes within mud and steam drums?
• Chain hoists are primarily designed for which type of lifting?
• What is the typical welding process used to install tubes in a steam drum?
• A pressure differential hydro test on an exchanger is one
• What is the purpose of spacers when an exchanger is blinded?
• Tube expanding is a method of
• The most commonly used wrench size for tray work is?
• What substance is resistant to oil and solvent but has poor resistance to chemicals?
• What is the unit used to express the area of the slab in the given calculation?
• Which fastener type is most commonly used in boiler construction?
• When installing test blinds, which bolt length is required?
• Before pipeline commissioning, to what position should the variable spring on a spring-type hangar be set?
• What type of valves are typically used on a sight glass to direct flow?
• What are lifting lugs used for?
• Where is the exchanger blinded during a tubeside pressure test?
• Which tool is recommended for preparing XXH 2-inch tubing for welding?
• What tool is normally used to check the alignment on the horizontal seams of the shell plates?
• Which characteristic of a gasket must be checked before the gasket is installed in a flange?
• What determines the type of bolts used to reassemble an exchanger after maintenance?
• What is the value of Pi
• Which decimal value of Pi is given in the material?
• In the cylinder volume problem, what is the diameter of the tank?
• Dimensional measurements can be found on all of the following except?
• What is the correct tightening sequence to begin in the torque on a sight glass after the glass is replaced?
• What is the typical procedure to install tubes in a steam drum?
• Which of the following is a bolt used in structural connections?
• Which row of fractions is in the correct numerical order?
• 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?
• Which material may be used to safely secure scaffold boards to a platform?
• All of the following would be reasons for rejecting a synthetic sling for rigging except?
• What is the first thing a boilermaker should do before cutting into a tank or vessel?
• Which fastener type is most commonly used in piping systems?
• When preparing to fit thick-wall boiler tubing, which measurement must be matched?
• For heat cutting pipe, which tool is essential for beveling?
• Why is the tube cut before installing the second plug in a plugged exchanger tube?
• Which bolt specification is required when test blinds are installed?
• What are the first two blinds turned on a tower being taken out of service?
• How many people can tie off to a vertical line?
• What pattern is recommended when tightening bolts on an eight-bolt flange?
• Where is the convection section located in a heater?
• Why does a boilermaker use a test tree that has a bleed valve when hydrotesting as exchanger?
• Back Gouging involves removing metal from which location?
• The channel head cover on an exchanger is used on which side?
• How much is 3 inches in hundredths of a foot?
• In the cylinder volume problem, what is the height of the tank?
• Which parameter must be free of obstruction to ensure the variable pipe support functions as intended?