Quiz on Piping & Plumbing Piping Quiz 1. What is the definition of Piping? Choose the correct answer: A) The transportation of water in homes B) Interconnected pipes subjected to the same set or sets of design to fulfill the purpose of fluid transportation using different flow control and measurement methods C) A method to measure fluid flow D) A non-metallic cylinder used to convey fluids Show Answer Explanation: Piping is defined as interconnected pipes subjected to the same set or sets of design to fulfill the purpose of fluid transportation using different flow control and measurement methods. 2. Which of the following is NOT a component of piping? Choose the correct answer: A) Pipe fittings B) Valves C) Pumps D) Insulation Show Answer Explanation: Insulation is not listed as a component of piping in the provided information. The components listed are pipe fittings, valves, instruments, and equipment like pumps, vessels, and heat exchangers. 3. What materials can pipes be made from? Choose the correct answer: A) Only metals B) Metals and ceramics C) Metals, ceramics, plastics, concrete, and fiberglass D) Only plastics and metals Show Answer Explanation: Pipes can be made from metals, ceramics, plastics, concrete, and fiberglass as mentioned in the provided information. What is Piping? Most people are familiar with plumbing as it constitutes water transportation in every home. Piping can be defined as: Interconnected Pipes subjected to the same set or sets of design to fulfill the purpose of fluid transportation using different flow control and measurement methods. Piping also contains many different types of components like: Pipe fittings, eg. Elbow, Tee, Reducers, Flanges, couplings etc. Valves, eg: Gate valve, Globe valve, Ball Valve, Butterfly valve, control valve etc. Instruments, eg: Pressure indicator, Temperature indicator, Flowmeter etc. Equipment, eg: Pumps, Vessels, Heat exchanger, Ejector etc. What is Pipe? The main part of any piping system is Pipes which are used to convey materials. Pipes can be defined as: “A metallic or non-metallic cylinder used to convey fluids or transmit fluid pressure.” A pipe is normally a tubular section but its shape is not restricted to a circle. Pipes are made out of Metals, Ceramics, Plastics, concrete, and fiberglass. Typically, metal pipe is made of Steel or Iron such as Carbon steel, Stainless steel, galvanized steel, ductile iron, brass, and alloy steel. Used of different metal pipe are designed as per pressure and fluid flowing through it. There are some terms related to pipes that are important to know by all piping engineers. Generally, Pipes for any pipe system to be used as per design and Piping standard codes. What is Nominal Pipe Size (NPS)? Pipe size is measured with this unit. A 4-inch pipe has never a dimension of 4 inches. Instead, its outer diameter is fixed at 4.5 inches and the inner diameter can vary depends on the thickness of the pipe. Nominal pipe size is neither OD nor ID of pipe. Manufacturing of NPS 1/8 inch to NPS 12″ pipe is done with a fixed pipe outside diameter. So, any increase in wall thickness is resulted in to decrease in Pipe inside diameter. Manufacturing of NPS 14 and above size pipe, OD has the same value of Nominal size of the pipe. For example, a 16″ NPS pipe will have an OD of 16″ only. Table for Pipe Outer diameter SL. NO.Nominal Pipe SizeOuter DiameterInchmmInchmm10.5130.842120.75191.052731251.3153341.25321.664251.5381.94862512.3756072.5642.8757383763.58993.58941021041024.5114114.511451271251275.5631411361526.6251681471787.6251941582038.6252191692299.625244171025410.75273181127911.75298191230512.75324201435614356 NOTE: This is to note that after 14″ pipe size, its outer diameter and NPS have the same value. Quiz on Piping Diameter Nominal Pipe Size (NPS) Quiz 1. What does the Nominal Pipe Size (NPS) signify? Choose the correct answer: A) Outer Diameter of the pipe B) Inner Diameter of the pipe C) A fixed dimension that is neither the Outer Diameter nor the Inner Diameter D) Wall thickness of the pipe Show Answer Explanation: Nominal Pipe Size (NPS) is a fixed dimension that is neither the Outer Diameter (OD) nor the Inner Diameter (ID) of the pipe. 2. What is the Outer Diameter (OD) of a 4-inch Nominal Pipe Size (NPS) pipe? Choose the correct answer: A) 4 inches B) 4.5 inches C) 3.5 inches D) 4.25 inches Show Answer Explanation: The Outer Diameter (OD) of a 4-inch Nominal Pipe Size (NPS) pipe is 4.5 inches. 3. What happens to the Outer Diameter (OD) for NPS 14 and above size pipes? Choose the correct answer: A) It remains the same as the Nominal Pipe Size (NPS) B) It increases by 1 inch for every inch of NPS C) It decreases by 1 inch for every inch of NPS D) It is twice the Nominal Pipe Size (NPS) Show Answer Explanation: For NPS 14 and above size pipes, the Outer Diameter (OD) has the same value as the Nominal Pipe Size (NPS). What is Pipe Nominal Bore (NB)? NPS is a frequently used term for referring to the size of a pipe. Basically, there is no difference between NB and NOS. NB is just an American way to refer to pipe size. What is pipe DN (Diameter Nominal)? DN or Diameter Nominal is an International indication and also the European equivalent of NPS to indicate pipe size. Here you have to note that DN is the way to indicate pipe size in “mm”. For example, 4″ pipe is simply mean as DN 100 What is Pipe Schedule? The unit of wall thickness measurement for a pipe is “Schedule“. This is the standard method to define the thickness of pipe in the process plants. To simplify the piping thickness indication system ASME (American Society of Mechanical Engineers) committee has developed a “Schedule Number” system based on modified Barlow’s wall thickness formula. Schedule number = P/S P is the service pressure in (psi) S is the allowable stress in (psi) So, what does Schedule 80 means? Schedule 80 is nothing but a pipe thickness indicator. In simple words, You can say that for a given material schedule 80 pipes can withstand a certain amount of pressure and stress. Quiz on Pipe Schedule Pipe Specification Quiz 1. What is Pipe Nominal Bore (NB)? Choose the correct answer: A) It refers to the size of a pipe in inches. B) It is the American way to refer to pipe size, same as NPS. C) It indicates the wall thickness of the pipe. D) It is the European equivalent of NPS. Show Answer Explanation: Pipe Nominal Bore (NB) is the American way to refer to pipe size, same as NPS. 2. What is pipe DN (Diameter Nominal)? Choose the correct answer: A) It refers to the size of a pipe in inches. B) It is the American way to refer to pipe size. C) It is the European equivalent of NPS and indicates pipe size in mm. D) It indicates the wall thickness of the pipe. Show Answer Explanation: Pipe DN (Diameter Nominal) is the European equivalent of NPS and indicates pipe size in mm. 3. What is Pipe Schedule? Choose the correct answer: A) It refers to the size of a pipe in inches. B) It is a unit of wall thickness measurement for a pipe. C) It is the European equivalent of NPS. D) It is the American way to refer to pipe size. Show Answer Explanation: Pipe Schedule is a unit of wall thickness measurement for a pipe, based on the Schedule Number system developed by ASME.
