Fundamental Insulation 1 Piping: Course Exam
Q: Trammel points are like _____
A: extended dividers
Q: The second layer of unjacked pipe covering (on hot work) should consist of half-sections cut into ____
A: 12 inch and 24 inch pieces
Q: The actual outside diameter of a 16-inch pipe is
A: 16"
Q: when cutting a 3-piece 90-degree elbow. What are the degrees that you should sut to get the desired 90-degrees
A: 22.5
Q: the slip roller has ___ rolls
A: 3
Q: on an insulated pipe with an outer diameter of 10 inches, approximately what length of canvas would you need to cover it properly
A: 35"
Q: Cloth jacketing may be dipped before it is applied. In this case, you prepare a lagging dip of ____
A: 4 parts adhesive to 1 part water
Q: when plotting pins for holding 2' x 4' sheets of insulation, the correct pin placement to hold these sheets are ___ and ___ pins
A: 6, 8
Q: Choose the correct definition for HEAT as used in the insulation industry
A: A form of energy that is transferred by a difference in temperature
Q: Choose the correct definition of COLD as used in the insulation industry
A: A loss or lack of heat; having a low temperature
Q: Choose the definition of a K FACTOR as used in the insulation industry
A: A measure of the amount of conduction that a material permits
Q: The flow of gas or liquid within a pipe is controlled by:
A: A valve
Q: The most important consideration for the insulation mechanic to take into account when insulating COLD piping is that:
A: A vapor barrier must be provided
Q: When making a channel in the middle of a piece of semi-rigid piping covering, it is important that you________
A: All of these ( remove a small amount of insulation at a time, don't pierce insulation, periodically check the depth and width of the channel)
Q: This jacketing material most often comes factory applied to the insulation material
A: All service jacketing
Q: When applying un-jacketed flexible sheets, you should
A: Begin wrapping at the top, then down the back of the pipe, so that you cover the part facing you last
Q: You need insulation that provides a vapor barrier and a high comprehensive strength. What is the best material to use
A: Cellular glass
Q: when applying field- cut blanket insulation that is to be secured with chicken wire you should ____________
A: Cut the chicken wire the same length as the insulation
Q: When marking off 1 inch distances on an arc, which of the following would you probably use
A: Dividers
Q: True or False: Black annealed wire is recommended for cellular. It is also is the most expensive form of wire
A: False
Q: True or false: the quality of the application of insulation in unexposed (concealed) areas doesn't need to have a neat and pleasant appearance
A: False
Q: Several elbows on a high temperature line must be insulated. Specifications required elbows to have a hard finish with a cloth jacketing. Which is the best material for insulating these fittings
A: Insulating Cement
Q: IPS is the abbreviation for:
A: Iron pipe size
Q: This insulation product is ideal for difficult to access areas such as void in walls. Fiberglass, mineral wool, and vermiculite are good examples:
A: Loose fill insulation
Q: The temperature of piping may reach 1500 degrees. The insulation may be subject to physical abuse and a fire hazard requires that the insulation be non-combustible. What material is the best choice for this situation
A: Perlite
Q: This insulation is produced primarily in 3-foot lengths with or without jacketing It comes pre-slit and hinged from the manufacturer
A: Pipe-covering - one piece sections
Q: This jacketing material offers the best hygienic properties
A: Plastic (PVC) jacketing
Q: Hot and cold water, roof drains and hot water tanks are all examples what type of system
A: Plumbing
Q: This insulation product is ideal for HVAC ducts and other power and process equipment where rigid boxes are specified
A: Rigid sheet/ board insulation
Q: When finishing insulated pipe with plastic jacking, you should ______
A: Run a bead of adhesive along the entire length of the jacketing, under the top
Q: During the pin welding process, which of the following is NOT a safety precaution
A: Standing in water is allowed when the welder is grounded
Q: This material is designed to stretch length wise and be used with mastics
A: Synthetic fabric
Q: Why is it important for the mechanical insulator to be able to identify various piping and equipment of the heating system
A: That proper insulation thickness and types are applied as per the specs for that particular job
Q: precipitators are designed to remove what from coal fired boilers
A: The impurities of fly ash
Q: Metal jacketing is sometimes used to insulate piping. One thing you should keep in mind about preparing metal jacketing is that ______
A: The metal piece should be rolled 1" smaller than the size needed to fit the insulated pipe
Q: One important difference between canvas and glass cloth is that____
A: The re-wettable type of glass cloth may be dipped in plain water to activate the adhesive
Q: when applying insulation to a reducer
A: The smaller insulation is butted up against the larger insulation
Q: Choose the correct definition of CONDUCTION as used in the insulation industry. It is one of the primary mechanisms of heat transfer that is defined as
A: The transfer of heat from a high temperature source to a low temperature object through physical contact
Q: choose the correct definition of CONVECTION as used in the insulation industry. It is one of the three primary mechanisms of heat transfer that is defined as
A: The transfer of heat from a region of higher temperature to a region of lower temperature by the displacement of cooler molecules by warmer molecules
Q: the most important thing for the insulation mechanic to know about bore coatings is that:
A: They protect the insulation from abrasion caused by a substrate movement
Q: one important fact to bear in mind about staples is that _____
A: They should clench outward when inserted
Q: True or false: S-slips help to support the weight of metal jacketing to vertical lines and tanks
A: True
Q: True or false: copper or copper clad wire should not be used against iron because of corrosion caused by electrolysis
A: True
Q: True or false: tape can be used instead of bands to secure the inner layer of cellular glass
A: True
Q: true or false: the strongest form of wire is stainless steel
A: True
Q: true or false: when using unjacked insulation, you should always stagger the joints
A: True
Q: When saddling in pipe covering at an unequal tee:
A: You may scribe the arc freehand or by using dividers
Q: Choose the correct definition of R FACTOR as used in the insulation industry
A: a measure of how much a material resists conduction
Q: Two pipes of different size may be connected by:
A: a reducer
Q: A diameter tape would be used to measure the circumference of _____
A: all of these (a round duct, a section of 4" pipe, a cylindrical vessel)
Q: Dividers can be used to mark off equal distances on _____
A: all of these (arc, circle, straight line)
Q: When mitering the branch section for an equal tee, you can layout 45 degrees and 90 degrees angles on a cutting surface by _____
A: all of these answers (square protractor, folding square sheet diagonally, using dividers to erect a perpendicular and bisect an angle)
Q: When establishing a vertical line on a tank face from a given point on a baseline, _____ would be attached to the plumb bob in and held perpendicular to the surface
A: an awl
Q: when reinforcing mastic with chicken wire, you should____
A: apply a first coat of mastic that is at least 1" thick
Q: For staples to be most effective, they should
A: be outward facing
Q: When mitering an elbow cover you should ________
A: be sure that size of the miter is not affected by the saw kerf
Q: Polyurethane foam_____
A: can be mixed and poured into a mold by hand
Q: This material is considered to be an almost perfect vapor barrier
A: cellular glass
Q: When steam has cooled enough to convert back to hot water, this process is called
A: condensate
Q: choose the correct list of five functions of insulation
A: conserve energy, prevent heat transfer, retard freezing, personnel protection and control fire hazards
Q: This adhesive material is used on cellular foams. It is applied to both surfaces to be joined.
A: contact adhesive
Q: Contact hangers are not meant for low temperature pipe because they
A: contact the pipe and allow for vapor migration
Q: What is another name for a key hole saw
A: copping saw
Q: You may use oversized pipe covering in some situations, such as when you are _______
A: covering a flanged valve or a screwed elbow or valve
Q: This type of welded pins are force through the insulation and then welded
A: cup heads
Q: When canvassing an elbow, you should not_____
A: cut out the piece of the canvas with scissors, you should tear it
Q: bungee cords and other commonly used temporary holding devices all operate on the principle of
A: elasticity
Q: When an insulator has to figure the number of miters for a piping elbow, they must first figure if the elbow in short or long radius. On a short radius elbow the radius is _____
A: equal to the diameter
Q: The fibers in this material are arranged in a manner that allows it to be worked with easily. It is suitable for the exterior of rectangular and round ducts and abnormally shaped spaces or surfaces where temperature and condensation must be controlled
A: flexible wrap/ duct wrap
Q: A sleeve is a circular length of plastic or metal that
A: goes through wall or floors during construction to provide a protected route for insulated lines to travel
Q: usually a steel tape rather than a folding rule will be used when measuring a surface_______________
A: in all of these instances (with a flat vertical axis that is over 20 feet long, with a curved vertical axis that is 13 feet in length, with a flat horizontal axis between 18 and 20 feet long)
Q: normally the contact hanger is used only on plumbing or moderate temperature piping, but sometimes you will need to maintain a vapor barrier with this type of hanger. In this case, you should
A: insulate the rod a distance equal to three times the thickness of the pipe covering
Q: If allowed to dry, this material could be re-wetted and used again
A: insulating cement
Q: which of the following is NOT a limitation of plastic (PVC) jacketing
A: is an excellent vapor barrier
Q: flexible-wrap pipe insulation ____
A: is best sealed at the butt joints with ASJ-SSL tape
Q: one coat of cement differs from an insulating cement in that:
A: it is a hydraulic setting
Q: On a sewing machine, the walking foot is designed to perform what function
A: it lifts and moves forward, in unison with the feed dog, to aid in movies the cloth through the machine
Q: which tool would be used to cut a 6-inch circular hole in a piece of rigid flat insulation material
A: key hole saw
Q: When using a hand crosscut saw to cut pipe covering insulation, the line to be cut should be drawn on the ________ of the insulation
A: long joints
Q: The void/ space left between a fitting or valve and the insulation may be packed with
A: loose fill or scrap insulation
Q: The adhesive material is applied to one side; then the joined surfaces must be held in place until dry
A: non-contact adhesive
Q: The insulation material has the best K FACTOR of any of the common insulation materials
A: polyurethane
Q: Squaring the edge of a piece of insulation is usually done when_____
A: preparing the cut material
Q: which tool would be the one most likely used drawing an angle of 65 degrees
A: protractor square
Q: which of the following tools would be the most likely to be used when measuring a large surface with s curved vertical axis
A: retractable steel tape
Q: This fiberglass insulation product is ideally suited for the application on tanks, vessels, large diameter pipes, and other round or irregular shaped equipment
A: rigid wrap/ tank wrap
Q: a set of calipers would likely be used to measure the diameter of a ______
A: section 3" to 4" pipe
Q: Before storing insulation on a project, what should be done first
A: should get the approval of the project superintendent
Q: One important thing to keep in mind about S- clips is that_______
A: the length of the template should be equal to the length of the butt lap specified
Q: The primary advantage of self-sealing laps is that
A: they are an integral part of material
Q: A lacing needle would be used_____
A: to join two edges of chicken wire
Q: True or false: tapes should be applied at ambient temperature (room temperature)
A: true
Q: If you use a block of wood to support the weight of a pipe at a clevis hanger, you should,___
A: use a block that is at least 3 " long
Q: If a line is exactly ______ it is said to be "plumb"
A: vertical
Q: expansion joints in pipe insulation are __________
A: voids that are packed with mineral wool
Q: when cutting a curved line in a semi- rigid insulation, the cut should be made____
A: with a sawing motion of a boning knife
Q: When applying pipe covering to a main line that has multiple branches, ________
A: you need to cut and position each section so that each branch is at an open joint
Q: When boxing in a valve________
A: you should never dig out insulation from the sides to accommodate
Q: To calculate the outside diameter of copper pipe and tubing, you must add____ to the inside diameter
A: ⅛"