Oklahoma Process Piping Journeyman Practice Exam –
Oklahoma – Practice Questions with Answers
Introduction
This document contains practice questions with answers covering
process piping, plumbing, fuel gas systems, drainage, venting,
water supply systems, and code requirements relevant to the
Oklahoma Process Piping Journeyman examination. It includes
calculations, installation standards, safety requirements, and
inspection topics commonly tested on licensing exams. The
material provides comprehensive exam preparation across multiple
code-based subjects and practical applications.
Exam Questions and Answers
Which of the following types of pipes is prohibited for use of a gas
piping system?
a. Cast iron
b. Steel
c. CSST
d. Aluminum --- correct precise answer ---a. Cast iron
,Steel gas piping, located inside buildings may exceed 5 psig when
piping is
a. Marked "high pressure gas"
b. Double strapped
c. Welded
d. Annealed copper --- correct precise answer ---c. Welded
What is the maximum developed for a 4-inch fixture drain from the
weir of the 4-inch trap to vent opening
a. 8 feet
b. 10 feet
c. 12 feet
d. 16 feet --- correct precise answer ---d. 16 feet
All of the following materials are acceptable as underground sewer
pipe installed within 5 feet of water service pipe except
a. Cast
b. PVC
c. ABS
d. Vitrified clay --- correct precise answer ---d. Vitrified clay
The roof area of a building is 4,000 square feet. The building is
located in an area that receives an average rainfall rate of 2 inches
per hour. What is the minimum diameter of a stormwater leader
for the projected roof area
,a. 2"
b. 3"
c. 4"
d. 5" --- correct precise answer ---b. 3"
What is the minimum number of roof drains that should be
installed for a 12,000-square-foot controlled flow roof drain system?
a. 1
b. 2
c. 3
d. 4 --- correct precise answer ---d. 4
The maximum distance between supports for horizontal ½ inch O.D.
tubing in a fuel gas systems
is?
a. 4 feet
b. 6 feet
c. 8 feet
d. 10 feet --- correct precise answer ---a. 4 feet
A distance along a soil or waste stack corresponding in general to a
story height, but not less than 8 feet, within which the horizontal
branches from one floor or story of a structure are connected to
the stack is?
, a. The developed length
b. Center to center
c. A stack vent
d. The branch interval --- correct precise answer ---d. The branch
interval
Which of the following may be used only on connections to a lawn
sprinkling system which is never subjected to back pressure or
continuous pressure and is installed on the discharge side of the
last control valve?
a. An atmospheric vacuum breaker
b. An air gap
c. A swing check valve
d. A double-check valve assembly --- correct precise answer ---a. An
atmospheric vacuum breaker
What is the minimum nominal pipe size for an air admittance valve
used to vent a horizontal fixture branch 1 1/2 inches in size?
a. 1 1/4 inches
b. 1 1/2 inches
c. 2 inches
d. 2 1/2 inches --- correct precise answer ---a. 1 1/4 inches
Horizontal steel gas pipe of 1-1/2" diameter shall be supported at
least every
Oklahoma – Practice Questions with Answers
Introduction
This document contains practice questions with answers covering
process piping, plumbing, fuel gas systems, drainage, venting,
water supply systems, and code requirements relevant to the
Oklahoma Process Piping Journeyman examination. It includes
calculations, installation standards, safety requirements, and
inspection topics commonly tested on licensing exams. The
material provides comprehensive exam preparation across multiple
code-based subjects and practical applications.
Exam Questions and Answers
Which of the following types of pipes is prohibited for use of a gas
piping system?
a. Cast iron
b. Steel
c. CSST
d. Aluminum --- correct precise answer ---a. Cast iron
,Steel gas piping, located inside buildings may exceed 5 psig when
piping is
a. Marked "high pressure gas"
b. Double strapped
c. Welded
d. Annealed copper --- correct precise answer ---c. Welded
What is the maximum developed for a 4-inch fixture drain from the
weir of the 4-inch trap to vent opening
a. 8 feet
b. 10 feet
c. 12 feet
d. 16 feet --- correct precise answer ---d. 16 feet
All of the following materials are acceptable as underground sewer
pipe installed within 5 feet of water service pipe except
a. Cast
b. PVC
c. ABS
d. Vitrified clay --- correct precise answer ---d. Vitrified clay
The roof area of a building is 4,000 square feet. The building is
located in an area that receives an average rainfall rate of 2 inches
per hour. What is the minimum diameter of a stormwater leader
for the projected roof area
,a. 2"
b. 3"
c. 4"
d. 5" --- correct precise answer ---b. 3"
What is the minimum number of roof drains that should be
installed for a 12,000-square-foot controlled flow roof drain system?
a. 1
b. 2
c. 3
d. 4 --- correct precise answer ---d. 4
The maximum distance between supports for horizontal ½ inch O.D.
tubing in a fuel gas systems
is?
a. 4 feet
b. 6 feet
c. 8 feet
d. 10 feet --- correct precise answer ---a. 4 feet
A distance along a soil or waste stack corresponding in general to a
story height, but not less than 8 feet, within which the horizontal
branches from one floor or story of a structure are connected to
the stack is?
, a. The developed length
b. Center to center
c. A stack vent
d. The branch interval --- correct precise answer ---d. The branch
interval
Which of the following may be used only on connections to a lawn
sprinkling system which is never subjected to back pressure or
continuous pressure and is installed on the discharge side of the
last control valve?
a. An atmospheric vacuum breaker
b. An air gap
c. A swing check valve
d. A double-check valve assembly --- correct precise answer ---a. An
atmospheric vacuum breaker
What is the minimum nominal pipe size for an air admittance valve
used to vent a horizontal fixture branch 1 1/2 inches in size?
a. 1 1/4 inches
b. 1 1/2 inches
c. 2 inches
d. 2 1/2 inches --- correct precise answer ---a. 1 1/4 inches
Horizontal steel gas pipe of 1-1/2" diameter shall be supported at
least every
