Pipefitter Star Practice Exam

These questions are part of the practice quiz. Start practicing

• The refrigerant's state change is primarily facilitated by which component?
• What is the maximum temperature that soldered joints can safely handle without compromise?
• Which of the following represents the square root of 2?
• What is the weight of one cubic foot of water in pounds?
• What is the formula for calculating the travel on a 45 degree rolling offset?
• Compressed gas cylinders shall only be moved when:
• A (n) _______ is the part of a refrigeration system responsible for the absorption of heat from a product or building spaces into the fluid (refrigerant) of the system.
• What is the primary function of the expansion device in a refrigeration system?
• When should a soldered joint be tested for leaks?
• When observing a south elevation view on a drawing, what perspective are you viewing from?
• The depth of a pipe thread may be tested by turning a fitting on by hand how many turns?
• Type L copper tube has which color stripe?
• To convert cubic inches to cubic feet, which conversion do you use?
• To find the travel length of a 45 degree offset, which multiplication factor is correct?
• An extension ladder must extend ______ feet above the landing.
• What is the safety factor for rigging slings?
• How many directions can be found on an isometric compass?
• What piping arrangement prevents a boiler from draining to a dangerous level?
• What device measures the specific gravity of liquid?
• Which type of refrigerant is known for not being condensable?
• What is the standard size of a coupling used with 3" pipe?
• What action would change on a receiver in a control system?
• What type of expansion joint does not utilize mechanical movement?
• A control valve may be bypassed with which type of valve?
• Which option is not a consideration for the location of a cooling tower?
• When can a confined space attendant perform a rescue of a non-responsive worker?
• What type of controller increases line pressure when room temperature increases?
• What is the term for the instantaneous change of state from liquid to vapor when a liquid flows from high to low pressure?
• If a gallon of water occupies 0.135 cubic feet, how many gallons will a tank 3 ft long, 36 inches wide, and 4 ft deep hold?
• When working inside of a confined space, the atmosphere must be monitored _______________.
• What type of copper tube may be used in HVAC systems?
• On an isometric drawing, vertical pipes are drawn at what angle from horizontal?
• When loosening the bolts on a flange, which bolts should you loosen first?
• What is the purpose of using a pipe hanger?
• The pressure by a fluid at rest, due to its weight, is called what?
• What is the best type of hanger for supporting a horizontal run of steam/condensate piping?
• What distinguishes a heat pump from an air conditioning unit?
• Which sling configuration provides the greatest capacity?
• A (n) _____ is a heat exchanger that transfers heat from a product or from room air into a low-temperature, low-pressure liquid gas refrigerant.
• For a 75 degree turn from a 90 degree welded long radius elbow, what is the proper layout technique?
• A _____ is used to sense temperature from a distant location.
• Which is the correct way to install wire rope clamps?
• When calculating the travel length of a 45 degree offset, which factor should you multiply by?
• What is NOT a final control element?
• What diameter does a 45 degree pipe elbow typically have?
• What is the mechanical advantage of a machine with a 6" primary pulley and an 18" secondary pulley?
• What is not a basic part of a closed control loop?
• When calculating offsets for piping, which angle is primarily used for standard elbows?
• Which sling angle places the slings under the greatest strain?
• What safety measure is typically taken when working with flanged joints?
• Convert 0/75 ft to an inch measurement. What is the correct answer?
• How is ACR tube measured?
• Which component is responsible for compressing refrigerant vapor?
• ______ is defined as the interface between peripheral equipment and digital systems.
• What is the purpose of a rolling hanger in a steam piping system?
• What is the radius measurement of an 8" welded long radius 45 degree elbow?
• At what pipe size does the nominal sizing change from inside diameter to outside diameter?
• What type of flame should be used to cut carbon steel?
• What type of hanger dampens vibration in piping systems?
• An up feed steam heating system has the heating units _____.
• A fan coil utilizes what method to distribute heating or cooling to a space?
• A (n) is a substance that moves heat by changing state from a liquid to gas when absorbing heat and from gas to liquid when rejecting heat.
• What is the primary purpose of the taper on a pipe thread?
• What type of reducer should be used on the discharge side of the pump?
• Capillary action is ________.
• If an excavation is deeper than 4 feet, ______________ must be used.
• Which component receives superheated vapor in a refrigeration system?
• If the pipe size is 4" and you have an offset distance of 36", what would be the cut piece length?
• Any crane signal in the palm of the hand means ________.
• In terms of fittings, what does the abbreviation "LR" stand for?
• Why is a bushing not considered a good replacement for a reducer?
• What does the coefficient of thermal expansion tell us?
• What is the primary purpose of flux in soldering?
• What does ACR stand for?
• Which type of valve may be used as a vacuum breaker if installed backwards on a steam system?
• What is the area of a circle with a diameter of 10 inches?
• Which condition can be created by high-pressure steam migrating into low-pressure areas?
• The _____ is the desired value where a process should be maintained.
• What is the primary function of a pressure gauge?
• If a hydronic terminal unit will not heat, what could be a possible issue?
• What is the rigging tool called?
• Flux is applied to a soldered joint _____.
• The main components of a refrigeration system that perform the heat-moving process are the evaporator and the _________.
• How much will a 300 ft long aluminum pipe grow in length when the temperature rises from 48 degrees to 18 degrees?
• What is the type of refrigeration system where 100% of the refrigerant is boiled off as it leaves the evaporator?
• In a refrigeration cycle, which device is responsible for removing heat from the refrigerant?
• Which of the following is a characteristic of a neutral flame?
• Condensate piping shall be ______.
• Which component should be installed near an expansion loop in a piping system?
• Before attaching a pressure regulator to a compressed gas cylinder, _______.
• What type of sensor is installed directly in the process stream?
• What type of fitting is required when reducing the pipe size on a horizontal steam pipe?
• High pressure condensate is piped to a ______.
• What can happen if an orifice plate is installed backwards?
• What is the approximate density of water in pounds per gallon?
• What component is key to processing the information sensed throughout a control system?
• The greatest contributor to pump/motor shaft misalignment is?
• Which component in a closed control loop is the primary element?
• How far should a copper tube be inserted into a cup for a brazed joint?
• What is the pressure halfway up an 80 ft tall open pipe filled with water?
• Soldered joints shall never be used on systems operating above _____ degrees
• To align a flange with 8 bolt holes, which type of hole must be performed?
• Steam piping shall be graded ______.
• What issue may arise from a horizontal pipe not being properly supported?
• The __________ is the portion of the process loop that makes a decision.
• Who is allowed to signal the crane?
• Which component stores liquid refrigerant in a refrigeration system?
• What is the same as 1 cubic foot in gallons?
• Pneumatic transmitters operate at pressures between 3 and _____ psig.
• A ________ evaporator is placed in the airstream to cool and remove humidity.
• Which tool is commonly used for cutting copper pipe?
• Which of the following is an example of a first class lever?
• The take off of any angle welded elbow is what?
• A _________ is used when returning condensate directly to the boiler is not possible.
• Steam traps operate based on which three principles?
• What does hydronics refer to?
• Which component is crucial for maintaining proper flow through steam traps?
• What is the weight in pounds of one gallon of water?
• What does "6G" represent regarding the position angle of the weld coupon?
• What type of knot or hitch can be used for lifting a length of small-bore pipe vertically?
• What type of device should be installed between the isolation valve and the union on the inlet of the steam trap?
• What should you do to prepare a flange for gasket installation?
• What happens to copper when it is annealed?
• How many gallons are there in one cubic foot of water?
• Guides are used near _____.
• A centrifugal pump motor turns what component?
• Which device should be used to provide support for vertical piping?
• What is the effect of using too much flux on a soldered joint?
• What does MSDS stand for?
• Fall protection must be worn when within _____ feet of a leading edge.
• The make-up water for a cooling tower must include what component?
• How many pounds does one cubic inch of mercury weigh?
• What is the area of a circle with a diameter of 18 inches?
• The face to center distance of a 4" welded long radius 45 degree elbow is:
• When a steam pipe crosses an I beam pipe support, which support should be installed?
• What type of hand signal includes pointing the thumb down to the side of the body?
• What safety equipment is essential when working with compressed gases?
• For a pipe fitting, what does the term "NPT" refer to?
• On an isometric drawing, how many degrees from horizontal are horizontal pipes drawn?
• Who can give the emergency stop crane signal?
• Which one is not a characteristic of a confined space?
• What is the volume in gallons of a cylindrical tank that is 3 feet in height and 2 feet in diameter?
• What is not a part of a closed control loop?
• A (n) ______ shall be used on the suction side of the hydronic pump.
• A _______ evaporator has refrigerant surrounding the tubes and chilled water is inside the tubes?
• What should you multiply by to determine the step ahead distance of a 45 degree equal spread offset?
• When hoisting a load with sharp edges, you should use ______.
• When the dog everything signal is given, the crane operator is to ___________.
• Why is it necessary to use flux on a soldered joint?
• What component causes a pressure drop of high pressure liquid refrigerant?
• In a lever system, what does the distance from the fulcrum to the point of applied effort determine?
• Which device uses a liquid column to measure vacuum?
• Which property of a substance affects how much weight it has at a given volume?
• What is the color of the oxygen hose?
• What type of crane signal includes pointing the index finger to the ground and moving it in a circular motion?
• If you double the size of a pipe, how many times does its capacity increase?
• How is a reducing tee ordered?
• The boiler feedwater pump operates due to a ___________.
• How many pounds are in a cubic foot of water?
• A crane should not be loaded beyond its _____ capacity.
• How should you assemble a four-bolt flange?
• A bourdon tube is found inside of a ______.
• What is used to soften PVD pipe and remove the gloss?
• If a soldered joint is overheated, _______.
• What is considered a non-condensable in a refrigeration system?
• A (n) _____ is the part of a refrigeration system that rejects heat.
• What is the proper method to ensure a PVC joint is made correctly?
• The four devices that make up a control loop are the primary element, the ________, the controller, and the final control element.
• The height of the hydronic system ______ the performance of the pump.
• Which part of a heat exchanger changes the state of the refrigerant to 100% liquid?
• A crane cannot be within _____ feet of a power line up to 50 KV.
• An occupant in an excavation must have an exit point within ______ feet.
• A control valve with two inlets and one outlet is known as a?
• A single pressure control main operates at pressures between 13 and _____ psig.
• Capillary action is used in ______ joints
• The beveled edge of an orifice plate is installed with the bevel _____.
• What is it called when two or more metals are mixed?
• A single line on a piping drawing represents which part of the pipe?