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Examen

Boilermaker NCCR Test Questions And Answers

Vendu
8
Pages
10
Grade
A+
Publié le
14-02-2024
Écrit en
2023/2024

Boilermaker NCCR Test Questions And Answers Boilermaker NCCR Test 1 ft 3-3/4 in + 2 ft 1-1/16 in +5 ft 10- 7/8 in = - ANS 9 ft 3-11/16 in A 1-inch plate is to be cut. Why should an acetylene gerulator on a cutting rig not be adjusted over 15 PSI? - ANS Acetylene is unstable above this pressure A big control valve is pulled who is responsible for the rigging? - ANS Crane operator and rigger A boiler maker must have all of the following when working inside a vessel except - ANS A flange spreader A boilermaker is hydrotesting an exchanger and finds that a tube is leaking, What should the boiler maker use to stop the leak? - ANS Plugs A boilermaker is installing trays in a tower. Where should the wired plates be installed? - ANS Between the trays A boilermaker who is hydrostatically testing an exchanger should have which of the following information? - ANS The correct test pressure. A channel head cover on an exchanger is used on the? - ANS Tube side A cylindrical tank is 10ft high and 7ft in diameter. What is the aproximate volume of the tank? (v=PI*Radius^2height) - ANS 385.0 cubic Ft. A gate valve is being removed from a product line. All of the following procedures must be performed except? - ANS Valve must be in closed position A leak in a fin fan is being repaired while hydrotesting ta being conducted on a piping system. What should be done during the repair? - ANS Pressure should be relieved before any tightening is started A major component of a tower is a? - ANS Downcomer A pipe will be lifted with wire rope slings, Which of the following techniques should be used? - ANS Use a double wrap on the choker to prevent the choke from sliding on the pipe A pressure differential hydro test on an exchanger is one - ANS That is different when fire water is used on the shell and a hydro pump is used on the tubes A reboiler in a tower is being hydrotested, the water should be at what level? - ANS Above the reboiler A reboiler in a tower is being hydrotested. The water should be at what level? - ANS Above the re-boiler A reinforcement pad is used on the shell of a vessel to - ANS Strengthen nozzles and man-ways A worker is installing a blind in a flange for blanking off the gas line to the burners. The appropriate gasket cannot be found. What should the worker do? - ANS Do not continue installing the blind until the proper gasket can be found According to OSHA, oxygen and acetylene cylinders in storage must be separated at what minimum distance? - ANS 20 Ft Add the following fraction and reduce to the lowest common denominator. 24 5/8+13 15/16+8 1/4 - ANS 46 13/16 After installation of a variable pipe support, A boilermaker should verify the? - ANS Proposed length of travel has no obstruction All of the following are possible reasons can overloading except? - ANS incorrect orientation of the support All of the following tools are used in preparation of the butt weld of a tube except? - ANS Chipping Gun All of the following would be reasons for rejecting a synthetic sling for rigging except? - ANS An identification tag on the wrong side of the sling All vessels elevations are taken from the - ANS top of steel on the embed ring (base plate) Before a wall burner is pulled for inspection - ANS The fuel gas valve must be shut Chain hoist are primarily designed for what type of lifting? - ANS Vertical lifting Dimensional measurements can be found on all of the following except - ANS Mechanical flow diagram Elevation adjustments on the pipe hanger should be made at which point? - ANS A Equal width grating panels are being unloaded on the job site. One piece measures 4 1/2 FT in width. There are 7 panels, what is the total width when all the panels are laid side-by-side? - ANS 31 1/2 FT Eye bolts, anchor bolts, and self taping bolts are all types of? - ANS Fasteners For high temperature service, one end of a stud should be? - ANS Marked B16 Handhole cap and plug material is verified by the - ANS P4 report How is a plate dog used? - ANS It clamps onto a flat shell-plate, for lifting the plate into position How many bolts must be removed so that a 3-inch 150# flange can be hot bolted? - ANS 0 How many people can tie off to a vertical line? - ANS A maximum of two people How many types of bubble caps are there? - ANS 6 How much is 3 inches in hundredths of a foot - ANS 0.35 How often must entry permits be updated during normal working hours. - ANS At the end of each shift change How should bolts on a 8-bolt flange be tightened? - ANS In a cross over pattern How should tubes be attached in drum holes? - ANS Rolled If the sling angle decreases, sling stress? - ANS Increses On a blueprint, 1/4"=1' means? - ANS 1 inch on the drawing equals 1 foot of actual size On a drawing, what is used to record any changes to the drawing? - ANS Revision Block On a open root weld on plate, the combined grooved angle of the beveled is? - ANS 30 degrees On site, who determines what grade of material to be used for repair? - ANS QA/QC Pack beds are found in all of the following locations except in. - ANS Furnaces Rigging is to be done with a wire sling over a steel beam, when is a softener required? - ANS At all times Scales on a drawing are usually written in - ANS inches and feet The best source for information about welding on a tube is the - ANS QA/QC The channel head cover on an exchanger is used on the - ANS Tube side The hitch made by wrapping the sling around the load, then passing one eye of the sling throughout a shackle is called? - ANS Choker Hitch The length of a rectangle is 8 Feet 6 Inches and the width is 4 Feet 7 Inches. What is the perimeter. - ANS 26 Ft 2 In The maximum fillet size on a tube to drum seal weld should be? - ANS 3/8 Inch The most commonly used wrench size for tray work is? - ANS 9/16 inch The tube to tube sheet joint achieved by mechanical or explosive expansion of the tube hole in the tube sheet is the? - ANS Expansion joint "J" Factor The variable spring on s spring type hangar should be adjusted to what position before the pipeline is put into service? - ANS Cold Thermal beveling of pipe in preparation for welding requires use of an? - ANS Oxyfuel Torch Thermocouples are used for - ANS Indicating the temperature of the metal to which its attached Tube expanding is a method of - ANS Connecting Variable spring-can supports should be used in what type of piping? - ANS Piping that must be supported at all times during thermal expansion and contraction What action should be taken if a boiler tube fails? - ANS Replace the failed tube What are lifting lugs? - ANS Rigging materials used to clamp onto surfaces such as shell plates or sheet metal What are the first two blinds turned on a tower being taken out of service? - ANS Inlet and outlet What are the four major components of a gate valve? - ANS Body, Bonnet, gate, and stem What are the most commonly used fasteners? - ANS Threaded bolts What are the three types of basic hitches - ANS Vertical, Choker, Basket What can be used in the place of a shackle pin - ANS Nothing What component must be removed before a u-tube bundle can be removed - ANS Channel Head What determines the type of bolts to be put back in an exchanger so that it can be bolted back together? - ANS The service of the exchanger What does "MTW" mean in reference to boiler tubing? - ANS Minimum Wall Thickness What does a grooved nut on an Acetylene rig indicate? - ANS The left hand thread is for acetylene use only What information is found on the exchanger nameplate? - ANS Exchanger operating pressure What information is required to locate a nozzle that will be installed on a vessel shell? - ANS The elevation and degree of the center-line of the nozzle What is "Back Gouging"? - ANS Removing metal from the other side of a welded joint What is a "Rosebud" normally used for? - ANS Heating metal What is a spud wrench most commonly used for? - ANS Aligning flanges What is indicated by the notation "3-inch, 150#" on an isometric drawing. - ANS 3-inch diameter, 150# Flange What is meant by "over heating" a metal with an oxyacetylene torch? - ANS Heating to a temperature that impairs the metal What is meant by the letters "RFWN" - ANS Raised face weld neck What is one way to permanently support a pipe in a pipe rack? - ANS With shoes What is the are of a concrete slab that is 25-feet 6-inches long and 10-feet wide? - ANS 255 Sqft What is the best tool to be used to prepare XXH 2-inch tubing for welding? - ANS Milling Motor What is the correct tightening sequence to begin in the torque on a sight glass after the glass is replaced - ANS D,I,C,J What is the demister pad used for? - ANS Filtering chemicals and vapors What is the difference in elevation between a point at 14 Feet 1/8 inch and a point at 11 Feet 1 3/4 inches? - ANS 2Ft 10 3/8 inches What is the first thing a boilermaker should do before cutting into a tank or vessel? - ANS Determine the content What is the most commonly used fasteners in boiler construction? - ANS Threaded What is the most commonly used light lifting device? - ANS Chain hoist What is the name of the heated interior of the boiler? - ANS Fire box What is the preferred socket for tray work? - ANS 12 point What is the preferred type of rigging material used to lift a coated pipe? - ANS Nylon slings/straps What is the primary purpose of P&ID? - ANS Provides scale drawings of piping and instrumentation control systems What is the primary reason for high-point vents in hydrotesting? - ANS To purge air pockets What is the proper way to attach two slings together? - ANS Use a shackle What is the sum of 3 7/8+ 2 5/8 + 3/16 - ANS 6.375 What is the total length of 4 1/16 inches, 5 1/8 inches, 2 3/4 inches, and 7 3/8 inches - ANS 19 5/16 inches What is the typical procedure to install tubes in a steam drum? - ANS TIG welding What is the value of "Pi" - ANS 3.142 What is used to expand tubes inside mud and steam drums? - ANS Rolling motors and espanders What minumum number of bolts must be removed when an 8 inch slip blind is blinded - ANS 5 What must be locked out before a tube can be removed safely from a reboiler? - ANS Feed water pumps What preparation must be made for the Spring-Can hangers of a section of a pipe before hydro testing can be - ANS No preparations must be made What problems are associated with tube rolling - ANS Improper expanding and depth What should be done before furnace fittings for tube replacements are ground? - ANS The inside of the fitting should be inspected What should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD WT pipe? - ANS 4 legged roller top jacks What should be used to plug a tube at either end of a well to prevent air circulation? - ANS Purge paper What should be used to secure a socket to an impact wrench? - ANS Retainer ring What should the boiler maker"crack" the cylinder valve before connecting the regulator to the oxyacetylene? - ANS To clean the cylinder valve of foreign matter What size generating tube stock is permitted inside the steam and mud drum of a boiler? - ANS 1 1/2 inch to 2 inch What substance is resistant to oil and solvent but has poor resistance to chemicals? - ANS Neoprene What tool is normally used to check the alignment on the horizontal seams of the shell plates? - ANS A 2-foot level What tool is typically used to remove hole caps from a stainless steel header? - ANS Cutting torch What tool is used to stop leaks on the tube sheet of exchanges - ANS Rolling Motor What tubes run vertically in a furnace? - ANS Radiant What type of bolt was used to anchor the pipe in the illustration? - ANS U-Bolt What type of drawing shows the precise dimensions of a section part of the larger plan - ANS Scale What type of exchanger needs only one end for plugging tubes? - ANS Hairpin What type of gasket is normally used on a flange valve in a High-Pressure/ High-Temperature line? - ANS Flexitallic Spiral Wound What type of gasket is usually used when a steam service drum is blinded? - ANS Garloc What type of purge must be maintained when a catalyst is removed form a reactor? - ANS Nitrogen What type of steel beams are attached to the furnace wall with clips to contain a boilers horizontal expansion? - ANS Buckstays What type of tank has legs on the roof? - ANS Floating roof What type of valve is used on a hydro test tree to maintain test pressure after the hydro has reached its required pressure? - ANS Check What type of valves are typically used on a sight glass to direct flow? - ANS 3 way valves What wrench size is required to tighten a nut on a 7/8-inch heavy hex head bolt in a flange - ANS 1 7/16 inches When an exchanger is blinded, spacers are used - ANS To space open the exhanger side for steaming or nitrogen purge When an exchanger tube is plugged, why is tube cut before the second plug is installed - ANS To prevent pressure build up When are steel chain slings recommended? - ANS When rigging from three points When must slip blinds be thicker than 3/8 inch when an exchanger is blinded off? - ANS When the hydro test exceeds pressure greater than what a 3/8 inch slip band is rated for When performing a welding repair, you must have a copy of what on hand? - ANS The quality assurance manual When should rigging material be attached to a bean that is being demolished? - ANS Before any bolts are removed or any cutting is done on the beam. Where can the pass partition of an exchanger be found - ANS On the channel head Where is the convection section of a heater located? - ANS Above the radiant tubes Where is the demister pad usually located? - ANS At the sump Where is the exchanger blinded during a tubeside pressure test? - ANS On the channel head flanges Where should the shell side gasket on the new tube bundle be installed? - ANS Over the floating head end of the tube bundle, before the bundle is put back in the exchanger Which gas passes through the center of a cutting torch tip? - ANS Oxygen Which of the following are required when test blinds are installed? - ANS longer bolts Which of the following are used to prevent tubes from sagging because of weight? - ANS Baffles Which of the following characteristics of a gasket must be checked before the gasket is installed in a flange? - ANS Check the size and rating stamped on the flanges Which of the following connecting units are used on pipe hangers? - ANS Eye Bolts, Turnbuckles, Threaded Rods Which of the following fasteners is used on concrete? - ANS Expansion anchor bolt Which of the following has a greater possibility of being a respiratory hazard? - ANS Asbestos Which of the following is a type of insulation used inside furnaces? - ANS Fire Brick Which of the following is most important when fitting up thick wall boiler tubing? - ANS The inside diameter must match up Which of the following materials may be used to safely secure scaffold boards to a platform? - ANS #9 Tie wire Which row of fractions is in the correct numerical order? - ANS 1/8, 3/16, 1/4, 5/16, 3/8, 7/16 Which type of insulation is required before a vessel is entered? - ANS Locking, Tagging, and Blinding lines that feed the vessel Which type of valve is shown as #7 on the iso? - ANS Control valve Which type pf drawing would normally be used to fabricate a spooled piece of pipe? - ANS Isomatric Who determines the size and type of spring can be used? - ANS Engineer Who is responsible for blocking valves that isolate a reboiler before work is begun? - ANS Operations Why are there ball checks on sight glass valves? - ANS To stop the flow if there are leaks or if the sight glass breaks Why does a boilermaker use a test tree that has a bleed valve when hydrotesting as exchanger - ANS To drain condensation Why is a Monel Gasket used in HF acid piping? - ANS Because of its high resistance to acid. Why must spring cans be adjusted after they are put into service? - ANS Because the lines become heavier when they are in service Why should a full port valve be used for a corrosion probe? - ANS So the probe will not corrode the valve

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Publié le
14 février 2024
Nombre de pages
10
Écrit en
2023/2024
Type
Examen
Contient
Questions et réponses

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Boilermaker
NCCR
Test 1
ft
3-3/4
in
+
2
ft
1-1/16
in
+5
ft
10-
7/8
in
=
-
ANS
9
ft
3-11/16
in
A
1-inch
plate
is
to
be
cut.
Why
should
an
acetylene
gerulator
on
a
cutting
rig
not
be
adjusted
over
15
PSI?
-
ANS
Acetylene
is
unstable
above
this
pressure
A
big
control
valve
is
pulled
who
is
responsible
for
the
rigging?
-
ANS
Crane
operator
and
rigger
A
boiler
maker
must
have
all
of
the
following
when
working
inside
a
vessel
except
-
ANS
A
flange
spreader
A
boilermaker
is
hydrotesting
an
exchanger
and
finds
that
a
tube
is
leaking,
What
should
the
boiler
maker
use
to
stop
the
leak?
-
ANS
Plugs
A
boilermaker
is
installing
trays
in
a
tower.
Where
should
the
wired
plates
be
installed?
-
ANS
Between
the
trays
A
boilermaker
who
is
hydrostatically
testing
an
exchanger
should
have
which
of
the
following
information?
-
ANS
The
correct
test
pressure.
A
channel
head
cover
on
an
exchanger
is
used
on
the?
-
ANS
Tube
side
A
cylindrical
tank
is
10ft
high
and
7ft
in
diameter.
What
is
the
aproximate
volume
of
the
tank?
(v=PI*Radius^2height)
-
ANS
385.0
cubic
Ft.
A
gate
valve
is
being
removed
from
a
product
line.
All
of
the
following
procedures
must
be
performed
except?
-
ANS
Valve
must
be
in
closed
position
A
leak
in
a
fin
fan
is
being
repaired
while
hydrotesting
ta
being
conducted
on
a
piping
system.
What
should
be
done
during
the
repair?
-
ANS
Pressure
should
be
relieved
before
any
tightening
is
started
A
major
component
of
a
tower
is
a?
-
ANS
Downcomer
A
pipe
will
be
lifted
with
wire
rope
slings,
Which
of
the
following
techniques
should
be
used?
-
ANS
Use
a
double
wrap
on
the
choker
to
prevent
the
choke
from
sliding
on
the
pipe A
pressure
differential
hydro
test
on
an
exchanger
is
one
-
ANS
That
is
different
when
fire
water
is
used
on
the
shell
and
a
hydro
pump
is
used
on
the
tubes
A
reboiler
in
a
tower
is
being
hydrotested,
the
water
should
be
at
what
level?
-
ANS
Above
the
reboiler
A
reboiler
in
a
tower
is
being
hydrotested.
The
water
should
be
at
what
level?
-
ANS
Above
the
re-boiler
A
reinforcement
pad
is
used
on
the
shell
of
a
vessel
to
-
ANS
Strengthen
nozzles
and
man-ways
A
worker
is
installing
a
blind
in
a
flange
for
blanking
off
the
gas
line
to
the
burners.
The
appropriate
gasket
cannot
be
found.
What
should
the
worker
do?
-
ANS
Do
not
continue
installing
the
blind
until
the
proper
gasket
can
be
found
According
to
OSHA,
oxygen
and
acetylene
cylinders
in
storage
must
be
separated
at
what
minimum
distance?
-
ANS
20
Ft
Add
the
following
fraction
and
reduce
to
the
lowest
common
denominator.
24
5/8+13
15/16+8
1/4
-
ANS
46
13/16
After
installation
of
a
variable
pipe
support,
A
boilermaker
should
verify
the?
-
ANS
Proposed
length
of
travel
has
no
obstruction
All
of
the
following
are
possible
reasons
can
overloading
except?
-
ANS
incorrect
orientation
of
the
support
All
of
the
following
tools
are
used
in
preparation
of
the
butt
weld
of
a
tube
except?
-
ANS
Chipping
Gun
All
of
the
following
would
be
reasons
for
rejecting
a
synthetic
sling
for
rigging
except?
-
ANS
An
identification
tag
on
the
wrong
side
of
the
sling
All
vessels
elevations
are
taken
from
the
-
ANS
top
of
steel
on
the
embed
ring
(base
plate)
Before
a
wall
burner
is
pulled
for
inspection
-
ANS
The
fuel
gas
valve
must
be
shut
Chain
hoist
are
primarily
designed
for
what
type
of
lifting?
-
ANS
Vertical
lifting
Dimensional
measurements
can
be
found
on
all
of
the
following
except
-
ANS
Mechanical
flow
diagram
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