Technology) Practice Questions With Complete Solutions
(4-049-1.1) A common material used for water and instrument
air piping in power plants is
a. galvanized steel
b. cast iron
c. bronze
d. copper Correct Answers d. copper
(4-049-1.10) A typical application of forged steel in a power
plant is:
a. welded pipe fittings
b. superheated steam lines
c. drain lines
d. ash handling systems Correct Answers a. welded pipe fittings
(4-049-1.11) Cast iron pipe has a high resistance to:
a. Water pressure
b. Impacts
c. Temperature changes
d. Corrosion Correct Answers d. Corrosion
(4-049-1.12) Up to and including DN 300 mm pipe, the
"nominal pipe size" refers to a pipe's
a. nominal circumference
b. nominal inside diameter
,c. nominal outside diameter
d. nominal wall thickness Correct Answers b. nominal inside
diameter
(4-049-1.13) With respect to NPS 14 pipe and larger, the
Nominal Pipe Size number is referring to the:
a. Outside diameter
b. Inside diameter
c. Thickness
d. Mass per metre of length Correct Answers a. Outside
diameter
(4-049-1.14) With respect to NPS 14 pipe and larger, as the wall
thickness is increased, the:
a. Inside diameter is reduced
b. Outside diameter increases
c. Weight of the pipe decreases
d. Bore of the pipe increases Correct Answers a. Inside
diameter is reduced
(4-049-1.15) In most sizes of pipe, Schedule 40 corresponds to
_____ wall thickness.
a. Welded only
b. Threaded only
c. Extra strong (XS)
d. Standard Correct Answers d. Standard
(4-049-1.16) The inside diameter of a pipe is expressed as the:
, a. Pipe size plus wall roughness
b. Nominal pipe size
c. Formula 2P-M=k
d. Outside diameter minus twice the wall thickness Correct
Answers b. Nominal pipe size
(4-049-1.2) Materials used for the manufacture of pipes for
power plants MUST be:
a. Manufactured only in Canada
b. Seamless regardless of the operating conditions
c. Suitable for the system operating conditions
d. Welded and stress relieved Correct Answers c. Suitable for
the system operating conditions
(4-049-1.3) The wall thickness of steel pipe is designated by its
_____________.
a. Schedule number
b. CRN number
c. Diameter
d. Material strength number Correct Answers a. Schedule
number
(4-049-1.4) With respect to NPS 14 pipe and larger, as the pipe
schedule increases, the outside diameter:
a. Dependent on the material selected
b. Remains the same
c. Decreases