Prepare for the NCCER Pipefitter certification exam with these practice questions and answers. This guide covers pipe fitting fundamentals, welding, rigging, blueprint reading, and safety procedures.
Q: OSHA approved anchorage point
Answer: when working from a suspended scaffold, wear a safety belt that is securely tied to the
Q: 3 1/2
Answer: a toe board must be what minimum height to comply with OSHA safety standards for scaffolding?
Q: 30 PSI
Answer: What maximum Air pressure may be used for cleaning?
Q: 18.21 in.
Answer: A tank has a diameter of 58ft, the circumference of the tank is 182.23ft, one degree of diameter equals 6.07 in.Three degrees of diameter will equal?
Q: 6′-8 5/8″
Answer: A piece of 2″ pipe is being cut to run between two 90 Degree threaded fittings, the center to center measurement of the fittings is 7′-2 1/2″What is the cut length of the pipe?
Q: 7.3750 in.
Answer: Convert 7 3/8″ to decimal equivalent
Q: 255 Sq.Ft
Answer: what is the area of a rectangle that is 25′-6″ long and 10′-0″ wide? ( A= W x L )
Q: 40 Sq.FT
Answer: what is the sq. footage of the surface area of a steel plate measuring 120 in. long by 48 in. wide?
Q: 119′-3 1/2″
Answer: A 14″ SCH carbon steel pipe is being installed in a pipe rack. The center line elevation of the pipe will be 120′ -3 1/2″. what will the bottom of pipe elevation be?
Q: 4.67 ft
Answer: The decimal of 56in. is
Q: 401.1
Answer: A tank holding 3,000 Gal. of water contains of many cu.ft. of water? ( one Gal. equals 0.1337 cu. ft)
Q: .25
Answer: How much is 3″ in hundredths of a foot?
Q: Use two rigging sling that are double wrapped and chocked one chocker is placed about 5ft from each end of the bundle
Answer: which of the following methods could be used to rig a 20 foot long bundle of six rebar rods that will be pick up by a small crane?
Q: three feet
Answer: ladders use with scaffolding must extend above the landing from a minimum distance of
Q: Machine Bolt
Answer: What can be used for a shackle pin as long as the thread patterns match?
Q: vertical lifting
Answer: Chain hoist are primarily designed for
Q: use a double wrap on the chocker to prevent the chocker from sliding on the pipe
Answer: A pipe will be lift with wire rope slings. Which of the following techniques should be used?
Q: 1 1/16in
Answer: What is the layout length of a 1 in. 3,000 pound threaded tee?
Q: vertical
Answer: A three legged pipe jack can be adjusted
Q: tapers 1/16 in. per in.
Answer: the NPT pipe thread
Q: three to four turns
Answer: A pipe has been threaded with a rigid 535 machine and now the threads are to be checked with a fitting. How many turns are normally sufficient to check the threads?
Q: cut and thread pipe a maximum of 2″ in diameter
Answer: a pipe machine is used to
Q: 4′- 7 7/15″
Answer: A new 1 1/2″ threaded line being run needs to change elevations from the centerline elevation of 101.3′ at column L -6 to the new centerline elevation of 96.4′ at column L-5. Use 90 Degrees, 3,000 LBs. Threaded fittings, and calculate the thread engagement with the pipefitters handbook. what cut length of 1 1/2″ pipe is needed?
Q: nipples
Answer: Short lengths of pipe, threaded on both ends and used to make connections between fittings , are called
Q: every day
Answer: an excavation must be inspected a minimum of
Q: swedge
Answer: A fitting used to join female ends of threaded pipe of different sizes is referred to as a
Q: a sump pump
Answer: A pump that can be submerged into a liquid in order to remove that liquid is called
Q: sloping
Answer: Employees working in excavations can be protected from cave-ins by cutting the excavation walls to the soil’s angle of repose. This method is known as
Q: clean the male and female end of ductile before interlocking
Answer: what is the first step of interlocking two joints of iron pipe?
Q: chain hoist or chain fall
Answer: What is the most commonly used light lifting device?
Q: Stap Wrench
Answer: Which of the following tools is used to install a 2″ threaded stainless steel pipe in a fitting
Q: Tee bolt
Answer: What kind of bolt is used in a cast iron mechanical joint flange?
Q: one quarter inch on the drawing equals one foot of actual size
Answer: on a blueprint, a note that says 1/2″ = 1′ means
Q: a plan view drawing
Answer: a top down view of the structure being erected is found on
Q: pipe diameter
Answer: All of the following drawing dimensions are used to determine the overall length of run of a pipe except
Q: an ordinate line
Answer: a line drawn along the surface of the pipe at division points that serves as a guide for cutting and marking contours is known as
Q: 1’5″
Answer: the missing measurement for dimenstion is
Q: thaper on end
Answer: what does the abbreviation T.O.E stand for?
Q: isometric
Answer: what drawing gives an overall view of the operational aspects of the end procest
Q: Nondemostrated Evaluation
Answer: NDE , when used in connection with materials , is an abbreviation for
Q: Orthographic
Answer: Which of the following drawing types represents a three dimensional view of a line of pipe with the horizontal lines drawn at 30 degree angles?
Q: acetylene is unstable above this pressure
Answer: one inch plate is to be cut. The acetylene regulator on the cutting rig should not be adjusted over 15 PSI, becasue
Q: 5 1/8″ inches
Answer: A six inch 90 degree ” Saddle on ” for a 12 inch header is to be fabricated. How far apart will the ordinate lines for this layout be?
Q: the root face on the bevel will be about as thick as a dime
Answer: pipefitters have just finish preparing the end of the pipe for butt welding. The put a ” Dime” edge on the bevel. This means that
Q: Left-hand thread for acetylene use only
Answer: A grooved nut on an oxyacetylene rig indicates
Q: adds flexibility to the fitting
Answer: Socket weld joints have a gap between the end of the pipe and the bottom of the socket.
Q: lateral length
Answer: What is the pat that a 45 degree pipe takes to get from one center line to another center line
Q: ring joint
Answer: Which of the following flanges is best suited for high pressure and high temperature service
Q: 1-1/2 times the diameter
Answer: what is the formula for finding end to center dimensions on a long radius butt weld elbow
Q: 5′-7 7/8″
Answer: What is the center to center measurement of the travel between two 1-1/2 threaded 45 degree ELL’s with an offset of 4 feet?
Q: Thermal Expansion
Answer: The expansion of pipe that is caused by an increased in temperature is called
Q: a pipe support installed at a 90 degree turn in the vertical direction of the main line
Answer: What is a Dummy Leg
Q: bottom of the beam along the beam centerline
Answer: Beam attachment used to support pipe hangers are typically welded to the
Q: put the travel stops in the spring
Answer: A section of pipe that has spring can hangers is to be hydrotested. what preparation, if any, must be made for the spring can hangers before starting the hydrotest?
Q: on the inside of the outside radius of the elbow
Answer: An eccentric dummy support welded on the back of a long radius 90 degree elbow is laid out
Q: carbon steel
Answer: drawing call for B-7 studs to be used on flanges. These studs are made of
Q: isometric drawing
Answer: Where can information about the service pressure rating, temperature limit, maximum PR pressure, and class of a piping system be located?
Q: raised face
Answer: which of the following is the most common flange facing used with steel flanges?
Q: all the bolts must be removed from the flange to remove the gasket
Answer: which of the following statements is true about a 6″, 300# full face flange used on a typical valve?
Q: 5 1/2″
Answer: What is the takeout for a 6″ x 3″ concentric reducer?
Q: Tight, begin tightening each bolt to the final required tightness using the proper torque pattern
Answer: Which of the following statement is true about the procedures for thightening the bolts on the flange?
Q: expansion
Answer: Loops in the piping system that absorbs the movement of the line caused by expansion and contraction are known as what type of loop?
Q: Corrode
Answer: What will a rapture disc do when it reaches a certain operating pressure or temperature?
Q: Horizontal
Answer: A valve is being rigged for installation in a vertical line the valve should be rigged so that the flange faces of the valve are
Q: mark a small diamond shape centered on the weld location on the south side of the flange
Answer: The millwrights are having problems to line up a pump. They checked and found that the discharge pipe flange needs to be adjusted a little the north side of the flange is found to be high. Which of the following should be done at this point?
Q: heat number
Answer: Which of the following is stamped or print on all piping?
Q: throttling
Answer: A needle valve is particularly suitable for which of the following applications
Q: the flow direction that is usually stamped or cast into the valve
Answer: Which of the following items indicates the direction of flow through a glove valve?
Q: Blocked open
Answer: During hydrotesting, gate valves within a piping system are normally
Q: start and stop flow
Answer: the plug valve is used to
Q: glove valve
Answer: The most common valve used to regulate flow is the
Q: make sure all piping is supported independently of the pump so that the pipe flange puts pressure on the pump flanges
Answer: A spool piece is to be made to fit a pump that has been moved. The pipe will be field route to the flanges of the pump. which of the following must be done to make this installation work properly?
Q: check the size and rating stamped on the flanges
Answer: How is the proper size gasket determined for used with a set of flanges?
Q: 8
Answer: A 4″ lateral riser for a 6″ pipe is to be fabricated. How many ordinates lines will be used to layout this cut?
Q: remove pressure relief valves
Answer: Which of the following should be done before performing the hydrostatic test
Q: stem
Answer: A preventive maintenance schedule calls for a specific valve to be lubricated. Grease is generally applied to which part of the valve?
Q: temperature will directly affect a test
Answer: which statement is correct about the effect of water temperature on hydro-testing results
Q: 1.375
Answer: what is the decimal of 1/2″ + 3/5″ / 0.500″?
Q: 12″
Answer: The domical size of a pipe and its outside diameter will be different up to what maximum diameter?
Q: an oxy acetylene torch
Answer: thermal beveling of a pipe in preparation for welding requires the used of
Q: socket welded
Answer: after a slip on flange slips over the end of the pipe. How is it double welded to the pipe at the neck and at the face of the flange?
Q: wrap adding machine paper around the pipe about 1-1/2 times. mark the paper where it overlaps square cut the paper at the mark. Fold the paper three times. Make a small angle cut at the corners to make notches
Answer: a 14″ 90 degree saddle is to be made for a 18″ heater. The regular wrap around is not available. Which procedure or statement below is correct about making and using a temporary wraparound to layout the ordinate lines?
Q: 6″
Answer: What is the take off for a 4″ x 3″ LR reducing 90 degree ELL?
Q: Have at least half the bolts in the flange. Drop the gasket in the middle of the flange. Place all of the bolts in the flange and then tighten the bolts. As the bolts are tightened the gasket will center itself
Answer: An installer is working on a 8″ carbon steel, 300 LBs raised face weld neck flange. How should the installer put a flexitallic gasket in this type flange?
Q: 8″
Answer: Given a 45 degree lateral is to be made on a standard weight 6″ riser on a 10″ diameter heater using a wraparound marked in eighths. How far from the end of the pipe should the wraparound line be drawn?
Q: Use an oxyacetylene torch, cut the hole with bevel sides slanted toward the middle of the pipe. This will make it easier to fit the saddle and to give a head start on beveling the hole on the heater pipe for welding
Answer: An installer is fabricating a 6″ carbon steel lateral on an 8″ carbon steel pipe heater. How will the installer cut out the hole in the heater to fit the saddle into the heater?
Q: erection sequence
Answer: the most important thing to consider when erecting a spool or piece of pipe is the
Q: The wider and more narrow the diamond, the more the pipe will move, so the diamond shape should be centered between the welds
Answer: which of the following statements is true about diamond heating a pipe?
Q: the pump must be final aligned before the pipe is fitted to the discharge flange
Answer: A spool piece is to be made to the discharge flange of a pump, which statement below is true about this task?
Q: Control
Answer: opening, closing and reopening of the valve is called the trap’s operating
Q: 4-1/2″
Answer: what is the suggested bolt length for a 4″, 300# raised face flange?
Q: beveled toward the flow
Answer: The inlet of a correctly installed orifice plate will be
Q: backing or chill rings
Answer: what is to eliminate weld defects that often form on the inside of the pipe as a result of the welding process?
Q: a pipe nipple that is used to join pipes of different sizes
Answer: what is a threaded swage nipple?
Q: two pieces of pipe that can not be turned, or to provide a way to disconnect the pipes at a future time without cutting the pipe
Answer: screw pipe is to be fitted. unions are normally used in this situation join