PIPEFITTER STAR EXAM STUDY GUIDE
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. Violent flashing and collapsing of vapor bubbles in a centrifugal pump is
called. - ANSWER ✔ Cavitation
2. Device that controls the pressure in a low pressure steam boiler - ANSWER
✔ Pressuretrol
3. Function of an evaporator - ANSWER ✔ Absorb heat from the system
4. Metal which has a high iron content - ANSWER ✔ ferrous
5. Why should the angle between the leg of a swing and the load never be less
than 30 degrees? - ANSWER ✔ More stress loads are applied on the sling
6. What are two kinds of misalignment that must be checked for when
installing pumps? - ANSWER ✔ Parallel and angular alignment
7. What is the function of a compressor? - ANSWER ✔ Create flow in the
system
,8. After fittings and tubes are cleaned and fluxed, they should be assembled
and soldered - ANSWER ✔ As soon as possible
9. The relief valve is sized to the ________ rating of a boiler - ANSWER ✔
Gross Output
10.Four types of copper tube joints - ANSWER ✔ Soldered, Brazed, Flared,
Compression
11.Most common hanger type - ANSWER ✔ Clevis
12.Which hitch can support the most weight? - ANSWER ✔ Basket Hitch
13.What causes water to move in a hydronic system - ANSWER ✔ The pump
creates a differential in pressure that moves the water.
14.The type of drawing that views a building by looking directly at the front,
top, and side is referred to as an _______ drawing. - ANSWER ✔
Orthographic
15.The type of drawing that most closely resembles an object as the eye would
see it is referred to as a ______ drawing. - ANSWER ✔ True isometric
16.T/F It is essential to install a pressure reducing valve on the inlet cold water
supply to a boiler water feeder. - ANSWER ✔ True
,17.Four types of check valves - ANSWER ✔ Swing, Lift, Vertical, and Ball
check valves
18.T/F With the quantity of flow in gpm constant, the velocity of flow will
increase with a decrease in pipe size. - ANSWER ✔ True
19.T/F The specific heat of a substance is the ratio of it's heat capacity to that of
water - ANSWER ✔ True
20.How many turns are required to open a closed ball valve? - ANSWER ✔ one
quarter turn
21.Formula for Density - ANSWER ✔ mass/volume=density
22.What is the area in square feet of a cooling tower reservoir (pan) which
measures 6 -10" x 8'- 2"?
A = _______ sq. ft. - ANSWER ✔ 55.80
23.Offset is the shortest perpendicular distance between the original line of flow
extension and the center line of the new line of flow. - ANSWER ✔ t
24.The degree of an offset is established by extending a straight line forward
from the original pipe run and then reading the number of degrees from that
line to the position of the pipe run, after it changes direction. - ANSWER ✔
t
25.When two lines join to form a 90° angle, they are perpendicular to each
other. - ANSWER ✔ t
, 26.By observation, Pipe #3 is higher than Pipe #1 in Fig. 3. - ANSWER ✔ t
27.Compute the cross-sectional area, in square feet, of a concrete pipe with an
inside diameter of 2' - 6".
A = _______ sq ft - ANSWER ✔ 4.9
28.Fig. 2 is a pair of parallel pipe lines with equal spread, offsetting around a
column using 45° ells. Compute C - C measurements A and E, write the
measurements in abbreviated form including the fittings. - ANSWER ✔ A
and E 12" C ell-C 45° ell
29.If the pipe size is 4" and the offset is 36", the cut piece for your travel will be
_______ (disregard weld gaps).
a. 60 7/8"
b. 50 7/8"
c. 45 7/8"
d. 31" - ANSWER ✔ b. 50 7/8"
30.You need to layout a 75 degree turn from a 90 degree welded long radius
elbow. How would you lay it out?
a. stand the elbow up on the shop table, use a protractor, mark the fitting,
and cut
b. grind the fitting down until th 75 degree is achieved
c. redo your layout to make the offset with 45 degree fittings
d. level the elbow horizontally, the layout the inside arc, center arc,
outside arc, and cut. - ANSWER ✔ d. level the elbow horizontally,
the layout the inside arc, center arc, outside arc, and cut.
31.What is the radius of an 8" welded long radius 45 degree elbow?
a. 5"
2026/2027 COMPLETE QUESTIONS WITH
VERIFIED CORRECT ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
1. Violent flashing and collapsing of vapor bubbles in a centrifugal pump is
called. - ANSWER ✔ Cavitation
2. Device that controls the pressure in a low pressure steam boiler - ANSWER
✔ Pressuretrol
3. Function of an evaporator - ANSWER ✔ Absorb heat from the system
4. Metal which has a high iron content - ANSWER ✔ ferrous
5. Why should the angle between the leg of a swing and the load never be less
than 30 degrees? - ANSWER ✔ More stress loads are applied on the sling
6. What are two kinds of misalignment that must be checked for when
installing pumps? - ANSWER ✔ Parallel and angular alignment
7. What is the function of a compressor? - ANSWER ✔ Create flow in the
system
,8. After fittings and tubes are cleaned and fluxed, they should be assembled
and soldered - ANSWER ✔ As soon as possible
9. The relief valve is sized to the ________ rating of a boiler - ANSWER ✔
Gross Output
10.Four types of copper tube joints - ANSWER ✔ Soldered, Brazed, Flared,
Compression
11.Most common hanger type - ANSWER ✔ Clevis
12.Which hitch can support the most weight? - ANSWER ✔ Basket Hitch
13.What causes water to move in a hydronic system - ANSWER ✔ The pump
creates a differential in pressure that moves the water.
14.The type of drawing that views a building by looking directly at the front,
top, and side is referred to as an _______ drawing. - ANSWER ✔
Orthographic
15.The type of drawing that most closely resembles an object as the eye would
see it is referred to as a ______ drawing. - ANSWER ✔ True isometric
16.T/F It is essential to install a pressure reducing valve on the inlet cold water
supply to a boiler water feeder. - ANSWER ✔ True
,17.Four types of check valves - ANSWER ✔ Swing, Lift, Vertical, and Ball
check valves
18.T/F With the quantity of flow in gpm constant, the velocity of flow will
increase with a decrease in pipe size. - ANSWER ✔ True
19.T/F The specific heat of a substance is the ratio of it's heat capacity to that of
water - ANSWER ✔ True
20.How many turns are required to open a closed ball valve? - ANSWER ✔ one
quarter turn
21.Formula for Density - ANSWER ✔ mass/volume=density
22.What is the area in square feet of a cooling tower reservoir (pan) which
measures 6 -10" x 8'- 2"?
A = _______ sq. ft. - ANSWER ✔ 55.80
23.Offset is the shortest perpendicular distance between the original line of flow
extension and the center line of the new line of flow. - ANSWER ✔ t
24.The degree of an offset is established by extending a straight line forward
from the original pipe run and then reading the number of degrees from that
line to the position of the pipe run, after it changes direction. - ANSWER ✔
t
25.When two lines join to form a 90° angle, they are perpendicular to each
other. - ANSWER ✔ t
, 26.By observation, Pipe #3 is higher than Pipe #1 in Fig. 3. - ANSWER ✔ t
27.Compute the cross-sectional area, in square feet, of a concrete pipe with an
inside diameter of 2' - 6".
A = _______ sq ft - ANSWER ✔ 4.9
28.Fig. 2 is a pair of parallel pipe lines with equal spread, offsetting around a
column using 45° ells. Compute C - C measurements A and E, write the
measurements in abbreviated form including the fittings. - ANSWER ✔ A
and E 12" C ell-C 45° ell
29.If the pipe size is 4" and the offset is 36", the cut piece for your travel will be
_______ (disregard weld gaps).
a. 60 7/8"
b. 50 7/8"
c. 45 7/8"
d. 31" - ANSWER ✔ b. 50 7/8"
30.You need to layout a 75 degree turn from a 90 degree welded long radius
elbow. How would you lay it out?
a. stand the elbow up on the shop table, use a protractor, mark the fitting,
and cut
b. grind the fitting down until th 75 degree is achieved
c. redo your layout to make the offset with 45 degree fittings
d. level the elbow horizontally, the layout the inside arc, center arc,
outside arc, and cut. - ANSWER ✔ d. level the elbow horizontally,
the layout the inside arc, center arc, outside arc, and cut.
31.What is the radius of an 8" welded long radius 45 degree elbow?
a. 5"
