Pipefitter NCCER Exam 2025

Convert 1/4 to its decimal equivalent. A) .01 B) .25 C) 0.4 D) 0.5 - Correct Ans-B Piping that is field-routed to a pump must be supported A) Off the pump suction B) Diagonally C) Independently D) Off the pump discharge - Correct Ans-C What is used when lighting a cutting torch ? A) Striker B) Cigarette lighter C) Match D) Any open flame - Correct Ans-A Where is specific information needed to install piping and associated items found ? A) Reliability network B) Owner of the company C) Material Manufacturer D) Standards and Specifications - Correct Ans-D Damaged and broken tools should be A) Used if possible B) Kept for backup C) Taken out of Service D) Used for minor tasks - Correct Ans-C What is the ID of 10'' schedule 80 piping. A) 9 3/16 B) 9 5/16 C) 9 9/16 D) 10 1/16 - Correct Ans-C The two steps in making up threaded joints are the hand engagement and A) Machine makeup B) Wrench makeup C) Driver makeup - Correct Ans-B Which of the following actions should be taken before a hydrostatic test is performed ? NCCER NCCER NCCER A) Remove pressure relief valves B) Leave control mechanisms in place C) Leave orifice flanges in place D) Remove blinds - Correct Ans-a A 4-inch lateral riser is to be fabricated for a 6-inch pipe. How many ordinate lines will be needed to lay out this cut ? A) 32 B) 16 C) 8 D) 4 - Correct Ans-C Who is qualified to repair power tools. A) Journey person B) Competent Technician C) Electrician D) Tool crib attendant - Correct Ans-B Which of the following plastic pipes is NOT joined by solvent welding ? A) PVC B) HDPE C) CPVC D) ABS - Correct Ans-B Material placed in the bottom of the trench under the pipe to provide support is called. A) Heave B) Sub trench C) Trench load D) Bedding - Correct Ans-D Socket weld joints have a gap between the end of the pipe and the bottom of the socket. What is the purpose of this gap ? A) Makes assembly easier B) Reduces flexibility at the fitting C) Prevents weld cracking D) Provides fit-up adjustment - Correct Ans-C When are rupture discs installed into a pipeline? A) Before flushing and testing of pipeline B) After installation of the pipeline C) Before start-up of the system D) After start-up of the system - Correct Ans-C Chain come-alongs are PRIMARILY designed for? A) Lifting in close quarters B) Vertical lifting NCCER NCCER C) Lifting in any location D) Horizontal lifting - Correct Ans-B Which of the following types of copper tubing has the thickest wall A) K B) L C) M D) Acr - Correct Ans-A What is the MINIMUM grade of chain that may be used for rigging loads overhead? A) 5 B) 6 C) 7 D) 8 - Correct Ans-D At and above what norminal pipe size is the O.D. of the pipe the same as the norminal size of the pipe. A) 10'' B) 12'' C) 14'' D) 16'' - Correct Ans-C Which type of field sketch has base lines that are 30 degrees to the horizontal axis? A) Orthographic B) Oblique C) P & ID D) Isometric - Correct Ans-D The MINIMUM number of pre-heat holes for liquefied fuel tips is A) 2 C) 6 B) 4 D) 8 - Correct Ans-C The first step to changing blades and bits on power tools is to A) Disassemble tool B) Disconnect the power C) Remove the guards D) Get a new blade or bit - Correct Ans-B What must be done to MOST socket welded valves before being welded into place? A) Close the valve completely B) Close the valve halfway C) Open the valve completely D) Cover the end of the valve - Correct Ans-C What is the length of pipe required to fabricate a 6''diameter schedule 40 pipe spool with one class 150# RFWN flange on one end, and one class 300# RFWN flange on the NCCER NCCER other end, with a face-to-face measurement of 18 1/2'' (assume a 1/8 welder gap) A) 10 11/16 B) 10 7/8 C) 12 5/16 D) 12 1/2 - Correct Ans-B What is the standard torqueing valve of the Victaulic coupling bolts? A) No torquing is required B) 40 inch pounds C) 60 inch pounds D) 80 inch pounds - Correct Ans-A At what dimension does a pipe begin to be measured by the outside diameter? A) 8 inches B) 10 inches C) 12 inches D) 14 inches - Correct Ans-D What is the 4 th ordinate cutback measurement for a 3'' diameter type 3 dummy leg on a 6'' elbow A) 12 7/16 B) 10 3/16 C) 8 11/16 D) 6 11/16 - Correct Ans-B What is the ratio of the distance that the ladder should be from the base of the wall to the height where the ladder meets the wall. A) 1/2 B) 1/3 C) 1/4 D) 1/5 - Correct Ans-C Trenches MUST be designed, excavated, and shored according to A) ASME standards C) Company standards B) API standards D) OSHA standards - Correct Ans-D The angles of any triangle add up to A) 45 degrees B) 90 C) 100 D) 180 - Correct Ans-D What is the travel on a rolling offset that has a Run of 18'', a roll 24'', and a height of 12'' A) 29 3/8 NCCER NCCER B) 32 5/16 C) 34 15/16 D) 38 9/16 - Correct Ans-C Which of the following is a quick opening valve? A) Globe B) Needle C) Butterfly D) Gate - Correct Ans-C Find the lowest common denominator for 1/8 and 1/2 A) 3 B) 5 C) 7 D) 8 - Correct Ans-D A piping drawing that shows both the side view and the top view of a piping system is A) Elevation B) Isometric C) Plan D) Double-line - Correct Ans-B The movement of pipe that is caused by an increase in temperature is called A) Hot spring B) Thermal expansion C) Heat swelling D) Pipe stretching - Correct Ans-B A cold spring relieves A) Cavitation B) Water hammer C) Thermal expansion D) Tension - Correct Ans-C How many feet apart must oxygen and fuel gas cylinders be stored, unless there is a 5 ft high, 30 minute burn rated wall between them? A) 5 B) 10 C) 15 D) 20 - Correct Ans-D When performing a line break, first? A) Break the bolts down & away from you B) Loosen each bolt a little at a time C) Break the bolts closest to you NCCER NCCER D) Loosen bolts in a cross over pattern - Correct Ans-A A pipe nipple is any length of threaded pipe that is shorter than A) 12'' B) 13'' C) 14'' D) 15'' - Correct Ans-A What is the reference angle if the hypotenuse of a right triangle is 36'' and its adjacent side is 14''. ( pipefitters blue book) A) 79 degrees B) 67 degrees C) 23 degrees D) 21 degrees - Correct Ans-B In piping systems, ball joints are installed to allow for? A) Expansion and Contraction C) Pressure Relief B) Chemical Absorption D) Open & Closing - Correct Ans-A All of the following drawing dimensions are used to determine the overall length of Run of a pipe EXCEPT. A) Pipe diameter B) Center-to-center C) Face-to-face D) Center-to-face - Correct Ans-A Ground fault circuit interrupters SHOULD be located A) Closest to the power tool B) At the source of power C) On individual extension cords D) On cords with only 3 prong connections - Correct Ans-D What is the most important hazardous condition in or around an excavation? A) Falls B) Water C) Cave-In D) Vibration - Correct Ans-C What happens when a misaligned pipe flange is bolted up to an aligned pump's suction flange ? A) The speed of the motor will increase. B) The pump and motor will be in alignment. C) The speed of the motor will decrease. D) The pump and motor will be out of alignment. - Correct Ans-D NCCER A pretest field inspection includes all of the following EXCEPT the A) Piping system matches the drawings B) Piping components match the specifications C) Proper gaskets are Installed D) Vent at the low point of the system - Correct Ans-D In relation to welding HAZ stands for A) Health activated zone B) Heat affected zone C) Hazard communications D) High altitude zone - Correct Ans-B Expansion joints allow A) The pipe line to be easily dismantled B) For linear expansion and contraction of pipe lines C) Easy access to flange connections D) Access to unclog the line - Correct Ans-B Level glasses are also called A) Sight glasses B) Eye glasses C) Inspection ports D) Spirit viles - Correct Ans-D Bending pipe allows the process to A) Coat less B) Heat up more C) Be stopped D) Flow more freely - Correct Ans-D Where are title blocks typically located on a drawing? A) Upper right B) Lower right C) Upper left D) Lower left - Correct Ans-B Expansion loops are NOT made with these types of fittings. A) Butt weld B) Threaded C) Socket weld D) Bell end - Correct Ans-B A plot shows the: A) Framework of a building B) Schematic diagram of a system NCCER NCCER NCCER C) Location of a building on a piece of property D) Locations of equipment within a system - Correct Ans-C A threading machine equipped with NPT dies is designed to cut which type of threads. A) Machine bolt threads B) National pipe threads C) New pipe threads D) Non-plumbed threads - Correct Ans-B The term, plum, relates to A) Horizontal alignment B) Vertical alignment C) Pipe height D) Pipe location - Correct Ans-B What is center-to-end length on a 3,000# 2'' SW 90 ELL? A) 2'' B) 2 1/2'' C) 2 3/8'' D) 1 1/2'' - Correct Ans-C Dry washing is a form of A) Removing excess weld B) Cold springing C) Stress relieving D) Hot springing - Correct Ans-A Who needs to inspect an excavation prior to the start of work each day? A) Forman B) Safety person C) Superintendent D) Competent person - Correct Ans-D When performing a hydrostactic test, at what percentage of the MAXINUM intended test pressure should the test be paused and the system inspected?