Rhode Island Master Pipefitter (2025-
2026) Exam Questions with Correct
Verified and Well Analyzed Answers
Graded A+
Full penetration of first pass
Welder will get full penetration of first pass.
1/8" root spacing
What is the purpose of the 1/8" root spacing on butt weld fitting?
22 1/2 degrees
What angle do you cut the pipe for a 3-piece elbow?
Purpose of a transformer
Change the range of variable type.
Smaller size pipe with larger pump
Can smaller size pipe sometimes be used by using a larger size
pump?
Pipe saddle
A pipe saddle is used to protect the pipe insulation from damage.
AC/DC
At what current is a 60-11 weld rod used?
Weld reducing fittings
Concentric Reducer, Reducing Tee, Reducing Elbow.
Formula for 45% offset
1.41 x run.
Purpose of a Hartford Loop
To prevent a boiler from draining out.
Turbulence in a heat exchanger
False - Turbulence in a heat exchanger or thermal converter increase
the heat.
Proper valve in drain line
Gate Valve.
Flared joint and compression joint
False - A flared joint and a compression joint are the same.
,Safety valve in gas system
Thermocouple.
Welded pipe vs threaded pipe
High Pressure - In a gas system when is welded pipe preferred over
threaded pipe?
Measurement of STD (long Radius) 90-degree weld elbow
1 1/2 the diameter.
Circumference of a pipe
Diameter X 3.14.
Space from end of pipe to shoulder of socket weld fitting
1/16.
Globe valve in feed water system
Feed water side against bottom of seat.
Excessive weld spatter
Too much heat/wrong polarity.
Saddle installed on a pipe
Protect insulation.
Pressure gauge on a boiler
Top of Boiler.
Siphon
What is between pressure gauge and piping?
Reaming pipe before threading
True - When threading a pipe, the pipe should be reamed before
threading is started.
O.D. and I.D. of pipe
True - The O.D. of pipe stands for outside diameter and the I.D. stands
for inside diameter.
Wall thickness of pipe sizes
False - All pipe sizes have the same wall thickness.
Bolt holes on companion flanges
False - It is not necessary to check the position of the bolt holes on a
set of companion flanges when making a flange joint connection.
Ring gasket and bolt holes
False - A ring gasket must have the bolt holes to match the bolt hole
in the flange connection.
Compression joint and flared joint
False - A compression joint is also known as a flared joint.
Welded joint vs screw joint
True - A welded joint is superior to a screw joint.
Gate valves usage
,True - Gate valves, as a rule, should be either fully open or fully
closed.
Globe valve resistance to flow
False - A globe valve has very little resistance to flow.
Valve marked 200 ***
False - A valve marked only 200 *** may be used for steam service.
Types of butterfly valves
Lug Type - There are three different types of butterfly valves. Name
one.
Installing a valve in a horizontal line
Stem Up - The best way to install a valve in a horizontal line is with
the stem up.
Most commonly used valve in piping
Gate Valve.
Turns to open a closed ball valve
1/4 - How many turns are required to open a closed ball valve?
Ball check valve installation
False - A ball check valve can be installed in a vertical line, regardless
of direction of flow.
Valve in boiler feed line
True - The valve closest to the boiler, in the boiler feed line must be a
globe valve.
Stuffing box
The Stuffing box can be repacked.
Valves installation
Valves should be installed so that they can open fully.
Clevis Hanger
The most common hanger used in piping work is the Clevis Hanger.
Pipe hanger and pipe supports
Pipe hanger and pipe supports perform the same function of keeping
the pipe where it should be.
Pipe guides
Pipe guides allow the pipe to move in an axial direction only.
Flanged joint
In making up a flanged joint the cross-over method should be used.
Boiler accessories installation
Why is it important for the pipefitter to understand correct procedures
in the installation of boiler accessories?
Lobe pump
Which of the following is not a rotary type pump?
, Pump piping
All suction and discharge piping connected to the pump should be
hung independently so that no strain will be transmitted to the pump.
Concentric reducer
When the pump suction connection must be reduced a concentric
reducer should be installed on the pump suction connection to the
pump.
P-Trap
What type of trap would you not use in a steam system?
Float traps
Float traps may be used to vent air or gas from water or other liquid
lines.
Inverted bucket trap
The discharge of condensate from an inverted bucket trap is
continuous.
Thermostatic traps
Installed correctly thermostatic traps are not subject to freeze ups.
Low water in a boiler
Low water in a boiler can be prevented through the use of relief
valves.
Steam boilers
Steam boilers can lose water due to priming and foaming.
Steam trap function
Explain the function of a steam trap: Separates steam from
condensate.
Water gauge purpose
What is the purpose of the water gauge on a steam boiler? See the
level of water in the boiler.
Return steam mains
Return steam mains should be pitched in the direction of the flow.
Steam supply mains
Steam supply mains should be pitched up in the direction of the flow.
Water hammer
Water hammer is caused by water in the steam line.
Return lines pitch
Steam Piping - How much should the return lines be pitched per foot?
1/8".
Check valve purpose
In a condensate return line what is the purpose of a check valve? To
prohibit condensate from traveling in the wrong direction.
2026) Exam Questions with Correct
Verified and Well Analyzed Answers
Graded A+
Full penetration of first pass
Welder will get full penetration of first pass.
1/8" root spacing
What is the purpose of the 1/8" root spacing on butt weld fitting?
22 1/2 degrees
What angle do you cut the pipe for a 3-piece elbow?
Purpose of a transformer
Change the range of variable type.
Smaller size pipe with larger pump
Can smaller size pipe sometimes be used by using a larger size
pump?
Pipe saddle
A pipe saddle is used to protect the pipe insulation from damage.
AC/DC
At what current is a 60-11 weld rod used?
Weld reducing fittings
Concentric Reducer, Reducing Tee, Reducing Elbow.
Formula for 45% offset
1.41 x run.
Purpose of a Hartford Loop
To prevent a boiler from draining out.
Turbulence in a heat exchanger
False - Turbulence in a heat exchanger or thermal converter increase
the heat.
Proper valve in drain line
Gate Valve.
Flared joint and compression joint
False - A flared joint and a compression joint are the same.
,Safety valve in gas system
Thermocouple.
Welded pipe vs threaded pipe
High Pressure - In a gas system when is welded pipe preferred over
threaded pipe?
Measurement of STD (long Radius) 90-degree weld elbow
1 1/2 the diameter.
Circumference of a pipe
Diameter X 3.14.
Space from end of pipe to shoulder of socket weld fitting
1/16.
Globe valve in feed water system
Feed water side against bottom of seat.
Excessive weld spatter
Too much heat/wrong polarity.
Saddle installed on a pipe
Protect insulation.
Pressure gauge on a boiler
Top of Boiler.
Siphon
What is between pressure gauge and piping?
Reaming pipe before threading
True - When threading a pipe, the pipe should be reamed before
threading is started.
O.D. and I.D. of pipe
True - The O.D. of pipe stands for outside diameter and the I.D. stands
for inside diameter.
Wall thickness of pipe sizes
False - All pipe sizes have the same wall thickness.
Bolt holes on companion flanges
False - It is not necessary to check the position of the bolt holes on a
set of companion flanges when making a flange joint connection.
Ring gasket and bolt holes
False - A ring gasket must have the bolt holes to match the bolt hole
in the flange connection.
Compression joint and flared joint
False - A compression joint is also known as a flared joint.
Welded joint vs screw joint
True - A welded joint is superior to a screw joint.
Gate valves usage
,True - Gate valves, as a rule, should be either fully open or fully
closed.
Globe valve resistance to flow
False - A globe valve has very little resistance to flow.
Valve marked 200 ***
False - A valve marked only 200 *** may be used for steam service.
Types of butterfly valves
Lug Type - There are three different types of butterfly valves. Name
one.
Installing a valve in a horizontal line
Stem Up - The best way to install a valve in a horizontal line is with
the stem up.
Most commonly used valve in piping
Gate Valve.
Turns to open a closed ball valve
1/4 - How many turns are required to open a closed ball valve?
Ball check valve installation
False - A ball check valve can be installed in a vertical line, regardless
of direction of flow.
Valve in boiler feed line
True - The valve closest to the boiler, in the boiler feed line must be a
globe valve.
Stuffing box
The Stuffing box can be repacked.
Valves installation
Valves should be installed so that they can open fully.
Clevis Hanger
The most common hanger used in piping work is the Clevis Hanger.
Pipe hanger and pipe supports
Pipe hanger and pipe supports perform the same function of keeping
the pipe where it should be.
Pipe guides
Pipe guides allow the pipe to move in an axial direction only.
Flanged joint
In making up a flanged joint the cross-over method should be used.
Boiler accessories installation
Why is it important for the pipefitter to understand correct procedures
in the installation of boiler accessories?
Lobe pump
Which of the following is not a rotary type pump?
, Pump piping
All suction and discharge piping connected to the pump should be
hung independently so that no strain will be transmitted to the pump.
Concentric reducer
When the pump suction connection must be reduced a concentric
reducer should be installed on the pump suction connection to the
pump.
P-Trap
What type of trap would you not use in a steam system?
Float traps
Float traps may be used to vent air or gas from water or other liquid
lines.
Inverted bucket trap
The discharge of condensate from an inverted bucket trap is
continuous.
Thermostatic traps
Installed correctly thermostatic traps are not subject to freeze ups.
Low water in a boiler
Low water in a boiler can be prevented through the use of relief
valves.
Steam boilers
Steam boilers can lose water due to priming and foaming.
Steam trap function
Explain the function of a steam trap: Separates steam from
condensate.
Water gauge purpose
What is the purpose of the water gauge on a steam boiler? See the
level of water in the boiler.
Return steam mains
Return steam mains should be pitched in the direction of the flow.
Steam supply mains
Steam supply mains should be pitched up in the direction of the flow.
Water hammer
Water hammer is caused by water in the steam line.
Return lines pitch
Steam Piping - How much should the return lines be pitched per foot?
1/8".
Check valve purpose
In a condensate return line what is the purpose of a check valve? To
prohibit condensate from traveling in the wrong direction.
