Pipefitter Star Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
What do the single straight lines and intersecting lines on a
piping drawing represent?✔️✔️ANSWER✔️✔️The lines and
intersections represent the center line of pipe and pipe fittings.
What is fitting "take-off"?✔️✔️ANSWER✔️✔️Fitting take-off is the
void space or distance from the end of the pipe, fully made up
into a fitting, and the center of the fitting.
Find the cross-sectional area, in square feet, of a steel pipe with
an outside diameter of 20".
A = _______ sq. ft.✔️✔️ANSWER✔️✔️2.2
The purpose of the compressor is to change ____________.
a. low-pressure, low temperature liquid to a high-pressure,
high-temperature liquid
b. high-pressure, high-temperature vapor to a low-pressure,
low temperature vapor
,c. low-pressure, low-temperature vapor to a high-pressure,
high-temperature vapor
d. high-pressure, high-temperature liquid to a low-pressure,
low-temperature liquid✔️✔️ANSWER✔️✔️low-pressure, low-
temperature vapor to a high-pressure, high-temperature vapor
When an object is refrigerated:✔️✔️ANSWER✔️✔️heat is
removed from it
The purpose of the condenser is to:✔️✔️ANSWER✔️✔️ready the
refrigerant for reuse
When using a thermostatic element charged expansion valve,
where floodback prevention is required, it is best to use a valve
containing ____________ charge.✔️✔️ANSWER✔️✔️cross
Contaminants may enter a refrigeration system because of;
hermetic motor failure
improper service procedures
refrigerant leak
any or all of the other three choices✔️✔️ANSWER✔️✔️any or all
of the other three choices
,A pressure gauge at atmospheric pressure is calibrated to
read:✔️✔️ANSWER✔️✔️0psig
When a refrigerant absorbs sensible heat, it's temperature
rises.✔️✔️ANSWER✔️✔️t
The best source of schematic, parts lists and instruments for
repair and calibration is:
A. manufacturers' literature
B. on the job training
C. instrument theory manuals
D. co-workers✔️✔️ANSWER✔️✔️instrument theory manuals
Process connection lines are indicated on an instrumentation
diagram by:
bold solid lines
bold broken lines
fine broken lines
fine solid lines✔️✔️ANSWER✔️✔️fine solid lines
, On an instrumentation diagram, the loop identification:
appears in the upper portion of the instrument balloon
B.
is the same for all instruments in a specific loop
C.
consists of two, three, or four letters
D.
identifies the measured or initiating variable✔️✔️ANSWER✔️✔️is
the same for all instruments in a specific loop
What is the approximate pressure, in psig, at the bottom of a
tank 20 ft. high filled with a fluid that has a specific gravity of
1.5?✔️✔️ANSWER✔️✔️12.99
In the field of process instrumentation, control action is usually
initiated by a:✔️✔️ANSWER✔️✔️sensor
Which of the following parts of a globe valve serves the same
purposes as the disc in a butterfly valve?
A.
plug
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
What do the single straight lines and intersecting lines on a
piping drawing represent?✔️✔️ANSWER✔️✔️The lines and
intersections represent the center line of pipe and pipe fittings.
What is fitting "take-off"?✔️✔️ANSWER✔️✔️Fitting take-off is the
void space or distance from the end of the pipe, fully made up
into a fitting, and the center of the fitting.
Find the cross-sectional area, in square feet, of a steel pipe with
an outside diameter of 20".
A = _______ sq. ft.✔️✔️ANSWER✔️✔️2.2
The purpose of the compressor is to change ____________.
a. low-pressure, low temperature liquid to a high-pressure,
high-temperature liquid
b. high-pressure, high-temperature vapor to a low-pressure,
low temperature vapor
,c. low-pressure, low-temperature vapor to a high-pressure,
high-temperature vapor
d. high-pressure, high-temperature liquid to a low-pressure,
low-temperature liquid✔️✔️ANSWER✔️✔️low-pressure, low-
temperature vapor to a high-pressure, high-temperature vapor
When an object is refrigerated:✔️✔️ANSWER✔️✔️heat is
removed from it
The purpose of the condenser is to:✔️✔️ANSWER✔️✔️ready the
refrigerant for reuse
When using a thermostatic element charged expansion valve,
where floodback prevention is required, it is best to use a valve
containing ____________ charge.✔️✔️ANSWER✔️✔️cross
Contaminants may enter a refrigeration system because of;
hermetic motor failure
improper service procedures
refrigerant leak
any or all of the other three choices✔️✔️ANSWER✔️✔️any or all
of the other three choices
,A pressure gauge at atmospheric pressure is calibrated to
read:✔️✔️ANSWER✔️✔️0psig
When a refrigerant absorbs sensible heat, it's temperature
rises.✔️✔️ANSWER✔️✔️t
The best source of schematic, parts lists and instruments for
repair and calibration is:
A. manufacturers' literature
B. on the job training
C. instrument theory manuals
D. co-workers✔️✔️ANSWER✔️✔️instrument theory manuals
Process connection lines are indicated on an instrumentation
diagram by:
bold solid lines
bold broken lines
fine broken lines
fine solid lines✔️✔️ANSWER✔️✔️fine solid lines
, On an instrumentation diagram, the loop identification:
appears in the upper portion of the instrument balloon
B.
is the same for all instruments in a specific loop
C.
consists of two, three, or four letters
D.
identifies the measured or initiating variable✔️✔️ANSWER✔️✔️is
the same for all instruments in a specific loop
What is the approximate pressure, in psig, at the bottom of a
tank 20 ft. high filled with a fluid that has a specific gravity of
1.5?✔️✔️ANSWER✔️✔️12.99
In the field of process instrumentation, control action is usually
initiated by a:✔️✔️ANSWER✔️✔️sensor
Which of the following parts of a globe valve serves the same
purposes as the disc in a butterfly valve?
A.
plug
