Book 1 Chapter 15: Piping Materials & Connections Flashcards
A solid billet of steel is used to produce __________ pipe.
A) Welded
B) Seamless
C) Cast iron
D) Flanged
B) Seamless
Potable drinking water lines cannot be made from copper.
A) True
B) False
B) False
Cast iron has a high resistance to _____________.
A) Intense pressure
B) Corrosion
C) Shock
D) Water hammer
B) Corrosion
____________ is used most often in plumbing systems for cold and hot water lines.
A) Cast iron
B) Steel
C) Aluminum
D) Copper
D) Copper
An advantage of plastic piping is:
A) Ease of assembly
B) Heavy weight
C) High cost
D) Resistant to high temperatures
A) Ease of assembly
After a pipe is cut with a wheel roller cutter, there is a burr left on the outside.
A) True
B) False
B) False
Gaskets are added to flanged joints to prevent leakage.
A) True
B) False
A) True
For more flexibility in pipe design ________ joints are used.
A) Flanged
B) Threaded
C) Welded
D) Soldered
C) Welded
The three general types of flange connections are the screwed, the lapped or loose flange (Van Stone) and the _________ type.
A) Threaded
B) Brazed
C) Soldered
D) Welded
E) Bolted
D) Welded
Cast iron has a high resistance to:
A) Corrosion
B) Water pressure
C) Tensile
D) Temperature changes
E) Condensate pressure
A) Corrosion
The best material for gaskets in very high temperature areas would be:
A) Nylon
B) Cork
C) Plastic foam
D) Rubber
E) Metallic
E) Metallic
Pipe is manufactured in two main categories, welded and:
A) Flanged
B) Soldered
C) Seamless
D) Threaded
E) Brazed
C) Seamless
Ring joint gaskets are:
A) Flat
B) Oval in cross-section
C) Hollow
D) Square in cross-section
E) Round in cross-section
B) Oval in cross-section
As a piping and pipe fitting material, cast steel is used:
A) Mainly for instrumentation and control piping
B) Extensively for fittings
C) For construction of welded pipe
D) Primarily for special applications
E) For steam traps only
B) Extensively for fittings
Gaskets are used in pipe flange joints to:
A) Make up for the misalignment of the pipe
B) Prevent leakage because of small imperfections in the flange face
C) Prevent air ingress in high pressure steam mains
D) Allow for pipe expansion between each flanged joint
E) Provide cushioning in the event of water hammer
B) Prevent leakage because of small imperfections in the flange face
Standard commercial pipe size is:
A) Is not manufactured anymore
B) Equal to approximate inside diameter up to 304.8mm
C) Equal to nominal inside pipe diameter
D) Equal to nominal outside pipe diameter
E) Equal to nominal outside diameter up to 254mm
B) Equal to approximate inside diameter up to 304.8mm
Screwed connections have threads that conform with which standard?
A) American Mechanical Pipe
B) American Standard Pipe
C) American Society Pipe
D) American Commercial Pipe
E) American National Pipe
B) American Standard Pipe
For power plants, materials used for the manufacturing of pipes must be:
A) Cast iron
B) Suited to the operating conditions
C) Case hardened
D) Alloyed with sulphur
E) Seamless stainless steel
B) Suited to the operating conditions
Double extra strong pipe is denoted by:
A) ES
B) XXS
C) SS
D) 2S
E) DES
B) XXS
Pipe fittings without clearly identified service designation markings should be:
A) Painted as required by the colour code
B) Used only with water systems
C) Rejected
D) Reported to the Boilers Branch
E) Tested and used
C) Rejected
When tightening pipe flange bolts:
A) Tighten every second bolt first then tighten the others
B) The top bolts must be tightened first
C) Use a cross-over method
D) The gasket should be glued in place
E) Tighten them in rotation sequence
C) Use a cross-over method
What is the wall thickness of a double extra-strong pipe with an actual outside diameter of 42.16mm?
A) 31.75mm
B) 51.93mm
C) 61.56mm
D) 9.70mm
E) 136.25mm
D) 9.70mm
A disadvantage of using threads to join pipes and fitting is that it:
A) Is more costly
B) Does not allow for expansion
C) Requires the services of a pipe fitter
D) Weakens the pipe
E) Cannot be repaired
D) Weakens the pipe
If a heavier schedule pipe is used, the outside diameter is:
A) Unchanged
B) Larger
C) Smaller
D) Equal to the schedule number
E) Machined to match the other pipe size
A) Unchanged
The three types of pipe flange gaskets are: the flat full face, the ring, and the:
A) Flat ring
B) Segemented ring
C) Stacked ring
D) Circular ring
E) Threaded
A) Flat ring
Copper and copper alloy piping and tubing is not used in power plants when:
A) Pressure is a prime factor
B) Temperature is a prime factor
C) Chemicals are used in the application system
D) Steam becomes corrosive
E) Instrumentation systems require tubing
B) Temperature is a prime factor
The most frequently used material for piping in building is:
A) Brass
B) Cast iron
C) Copper
D) Wrought iron
E) Steel
E) Steel
________ are used to provide easy assembly and dismantling of screwed piping connections.
A) Elbows
B) Couplings
C) Valves
D) Flanges
E) Unions
E) Unions
The mass of a two metre length of schedule 40 pipe, nominal size 101.6mm is:
A) 11.48kg
B) 26.92kg
C) 31.9kg
D) 8kg
E) 12.04kg
B) 26.92kg
The piping service symbols “W”, “O”, “G” stand for:
A) Water, oxygen, and grease
B) Water, oil, gas
C) Waste, oxygen, gas
D) Water, oil, and glycol
E) Tungsten, oxygen, and gallium
B) Water, oil, gas
Joining or connecting lengths of piping by the use of threaded pipe and screwed connections has the disadvantage of:
A) The piping can not be easily assembled or disassembled
B) There is no chance of leakage
C) Gaskets are not required
D) The strength of the pipe is reduced
E) A qualified welder must be used
D) The strength of the pipe is reduced
One of the general designs of gaskets is the ________ gasket
A) Ring joint
B) Soft
C) Hard
D) Round
E) Fat
A) Ring joint
The flange of the _______ face design has been found to be the most suitable for high pressure and is the easiest to disassemble.
A) Tongue and groove
B) Flat
C) Male and female
D) O-ring
E) Raised
E) Raised
Seamless steel pipe is made from a solid billet of steel which is pierced and rolled is used for _______ service.
A) Higher pressure
B) oil
C) Steam
D) Water
E) Lower pressure
A) Higher pressure
The grooved pipe system uses a joining connection made with a/an ______ that also serves as a union between the fitting and the piping.
A) Coupling collar
B) Flange fitting
C) Elbow
D) Adaptor
E) Quick couple
A) Coupling collar
Threaded cast iron pipe fittings cannot be used for _______ service piping systems.
A) Water
B) Oil
C) Steam
D) Chemicals
E) Gas
E) Gas
Threaded ________ pipe fittings cannot be used for gas service piping systems.
A) Aluminum
B) Cast iron
C) Malleable
D) Steel
E) Copper
B) Cast iron
Gaskets used for higher pressures and temperatures are made from:
A) Metal or metal reinforced flexible graphite
B) Rubber
C) Teflon
D) Neoprene
E) Cork
A) Metal or metal reinforced flexible graphite
One of the general types of pipe flanges used is the ______ flange
A) Eight bolt
B) Raised face
C) Six bolt
D) Lapped or slip-on
E) Flat face
D) Lapped or slip-on
When pipe is cut with a wheel and roller cutter, a burr is left on the inside of the pipe that is removed with a pipe.
A) Bender
B) Cleaner
C) Cutter
D) Reamer
E) Threader
D) Reamer
