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When working from a suspended scaffold, wear a safety belt that is securely tied to the?
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A toe board must be at what minimum height to comply with OSHA safety standards for scaffolding?
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Pipefitter Nccer V4

2022/23

QuestionAnswer
When working from a suspended scaffold, wear a safety belt that is securely tied to the? OSHA approved anchorage point
A toe board must be at what minimum height to comply with OSHA safety standards for scaffolding? 3 1/2
What maximum air pressure may be used for cleaning? 30 PSI
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? 18.21 in
A piece of 2" pipe is being cut to run between two 90 degree threaded fittings, the center to center measurements of the fittings is 7'-2 1/2". What is the cut length of the pipe? 6'8- 5/8"
Convert 7 3/8'' to decimal equivalent 7.3750 in
What is the are of rectangle that is 25' - 6'' long and 10'-0'' wide? 255sq ft
What is the sq. footage of the surface are of a steel plate measuring 120'' long by 48'' wide 40 sq ft
A 14" SCH carbon steel pipe is being installed in a pipe rack. The centerline elevation of the pipe will be 120' - 3 1/2". What will the bottom of pipe elevation be? 119' - 3 1/2"
Convert 56" to feet 4.67 ft
A tank holding 3000 Gal. of water contains how many cu.ft of water? ( One gal = 0.1337 cu. ft) 401.1
How much is 3" in hundredths of a foot? .25
Which of the following methods could be used to rig a 20 foot long bundle of 6 rebar rods that will be picked up by a small crane? Use two rigging sling that are double wrapped and chocked, one chocker is placed about 5ft from each end of the bundle
Ladders used with scaffolding must extend above the landing from a minimum distance of ? 3 feet
What can be used for a shackle pin as long as the thread patterns match? Machine bolt
Chain hoist are primarily designed for? Vertical lifting
A pipe will be lifted with wire rope slings. Which of the following techniques should be used? Use a double wrap on the chocker to prevent the chocker from sliding on the pipe
What is the layout length of a 1 in. 3,000 pound threaded tee? 1 1/16 in
A three legged pipe jack be adjusted ? Vertically
The NPT pipe thread Taper are 1/16 in. per in
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? Three to four turns
A pipe machine is used to ? Cut and thread pipe a maximum of 2" in diameter
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. What cut length of 1 1/2" pipe is needed? 4'- 7 7/15"
Short lengths of pipe, threaded on both ends and sued to make connections between fittings, are called? Nipples
An excavation must be inspected a minimum of ? Every day
A fitting used to join female ends of threaded pipe of different sizes is referred to as ? Swedge
A pump that can be submerged into a liquid in order to remove that liquid is called? A sump pump
Employees working in excavations can be protected from cave-ins by cutting the excavations walls to the soils angle of repose. This method is known as? Sloping
What is the first step of interlocking two joints of iron pipe? Clean the male and female end of ductile before interlocking
What is the most commonly used light lifting device? Chain hoist or chain fall
Which of the following tools is used to install a 2" threaded stainless steel pipe in a fitting? Stap wtrench
What kind of bolt is used in a cast iron mechanical joint flange? Tee bolt
On a blueprint, a note that says 1/2" = 1' means One half inch on the drawings equals one foot of actual size
A top and down view of the structurer being erected is found on a Plan view drawing
All of the following drawing dimensions are used to determine the overall length of run of a pipe except? Pipe diameter
A line drawn along the surface of of the pipe at division points that serves as a guide for cutting and marking contours is known as? An ordinate line
What does the abbreviation T.O.E stand for? Thaper on end
What drawing gives an overall view of the operations aspects of the end procest? Isometric drawing
When used in connection with materials, is an abbreviation for Non-demonstrated Evaluation
Which of the following drawing types represents a three dimensional view of a line of pipe with the horizontal lines drawn at 30 degrees angles? Orthographic
One inch plate is to be cut. The acetylene regulator on the cutting rig should not be adjusted over 15 PSI because ? Acetylene is unstable above this pressure
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? 5 1/8"
Pipefitters have just finished preparing the end of the pipe for butt welding. They put a "dime" edge on the bevel. This means that? The root face on the bevel will be about as thick as a dime
A grooved nut on an oxyacetylene rig indicates? Left-hand thread for acetylene use only
Socket weld joints have a gap between the end of the pipe and the bottom of the socket to? Add flexibility to the fitting
What is the path that a 45 degree pipe takes to get from one centerline to another centerline Lateral length
Which of the following flanges is best suited for high pressure and high temperature service? Ring joint
What is the formula for finding end to center dimensions on a long radius butt weld elbow? 1.5 times the diameter
What is the center to center measurement of the travel between two 1 - 1/2 threaded 45 degree L's with an offset of 4 feet? 5'-7 7/8"
The expansion of pipe that is caused by an increase in temperature is called? Thermal expansion
What is a dummy leg? A pipe support installed at a 90 degree turn in the vertical direction of the main line
Beam attachment used to support pipe hangers are typically welded to the Bottom of the beam along the beam centerline
A section of pipe that has spring can hangers is hydrotested. What prep, if any, must be made for the spring-can hangers before starting the hydrotest? Put the travel stops in the spring
An eccentric dummy support welded on the back of a long radius 90 degree elbow is laid out on? Inside of the outside radius of the elbow
Drawing called for B-7 studs to be used on flanges. These studs are made of Carbon steel
Where can information about the service pressure rating, temperature limit, maximum PR pressure, and class of piping system be located? Isometric drawing
Which of the following is the most common flange facing used with steel flanges? Raised face
Which of the following statements is true about a 6", 300# full face flange used on a typical valve? All the bolts must be removed from the flange to remove the gasket
What is the takeout for a 6" x 3" concentric reducer? 5 1/2"
Which of the following statements is true about the procedures for tightening the bolts on a flange? Begin tightening each bolt to the final required tightness using the proper torque pattern
Loops in the piping system that absorbs the movement of the line caused by expansion on the contraction are known as what type of loop? Expansion loop
What will a rapture disc do when it reaches a certain operating pressure or temperature? Corrode
A valve is being rigged for installation in a vertical line the valve should be rigged so that flange faces of the valve are Horizontal
The millwrights are having problems to line up a pump. They checked and found that the discharge pipe flange needs to be adjusted, the north side of the flange is found high. Which of the following needs to be done at this point? Mark a small diamond shape centered on the weld location on the south side of the flange
Which of the following is stamped or printed on all piping? Heat number
A needle valve is particularly suitable for which of the following appliations? Throttling
Which of the following items indicates the direction of flow through a glove valve? The flow direction is usually stamped or cast into the valve
During hydrotesting, gate valves within a piping system are normally? Blocked open
The plug valve is used to? Start and stop flow
The most common valve used to regulate flow is the ? Glove valve
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? Make sure all piping is supported independently of the pump so that the pipe flange puts pressure on the pump flanges.
How is the proper size gasket determined for use with a set of flanges? Check the size and rating stamped on the flanges
A 4" lateral riser for a 6" pipe is to be fabricated. How many ordinate lines will be used to layout this cut? 8
Which of the following should be done before performing the hydrostatic test Remove pressure relief valves
A preventive maintenance schedule calls for a specific valve to be lubricated. Grease is generally applied to which part of the valve? Stem
Which statement is correct about the effect of water temperature on hydro-testing results Temperature will directly affect a test
What is the decimal answer of 1/2" + 3/5" / 0.500" ? 1.375"
The domical size of a pipe and its outside diameter will be different up to what maximum diameter? 12"
Thermal beveling of a pipe inn preparation for welding requires the used of ? An oxy-torch
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? Socket welded
A 14" 90 degree saddle is to be made for a 18" heater. The regular wrap around is not available. Which procedure is correct about making and using temporary wrap-around to layout the ordinate lines? Wrap adding machine paper around the pipe 1-1/2 times, mark the paper where it overlaps square cut the paper at the mark. Fold the paper 3 times. Make a small angle cut at the corners to make notches
What is the takeoff for a 4" x 3" LR reducing 90 degree L? 6"
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 of flange? 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. All the bolts are tightened to eh gasket will center itself.
Given a 45 degree lateral is to be made on a standard weight 6" riser on a 10" diameter heater using a wrap-around marked in eighths. How far from the end of the pipe should the wrap-around line be drawn? 8"
An installer is fabricating a 6" carbon steel lateral on a 8" carbon steel pipe heater. How will the installer cut out the hold in the heater to fit the saddle into the heater? Use an oxytorch, 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 hold on the heater pipe welding.
The most important thing to consider when erecting a spool or piece of pipe is the Erection sequence
Which of the following statements is true about diamond heating a pipe? The wider and more narrow the diamond, the more the pipe will move, so the diamond shape should be centered between the welds.
A spool piece is to be made to the discharge flange of a pump, which statement below is true about this task? The pump must be final aligned before the pipe is fitted to the discharge flange.
Opening, closing and reopening of the valve is called the trap's operating Control
What is the suggested bolt length for a 4", 300# raised face flange? 4 - 1/2"
The inlet of a correctly installed orifice plate will be? Beveled toward the flow
What is to eliminate weld defects that often form on the inside of the pipe as a result of the welding process? Backing or chill rings
What is a threaded swage nipple? A pipe nipple that is used to join pipes of different sizes
Screw pipe is to be fitted. What unions are typically used in this situation? Two pieces of pie that cannot be turned, or to provide a way to disconnect the pipes at a future time without cutting the pipe
Created by: JonaMura
 

 



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