OKLAHOMA PROCESS PIPING JOURNEYMAN
1. What is the primary purpose of a pipe support?
A. Increase pressure
B. Prevent corrosion
C. Carry pipe weight and loads
D. Improve flow rate
ANSWER : C
Explanation: Pipe supports are designed to carry the weight of the pipe,
fluid, insulation, and external loads while preventing excessive stress.
2. Which fitting is used to change the direction of piping by 90
degrees?
A. Tee
B. Coupling
C. Elbow
D. Union
ANSWER : C
Explanation: A 90-degree elbow changes the direction of flow by 90
degrees.
3. What does NPS stand for in piping systems?
A. National Pipe Standard
B. Nominal Pipe Size
C. Normal Pressure Scale
D. Nominal Pressure System
,ANSWER : B
Explanation: NPS is the North American standard designation for pipe
diameter.
4. Which valve is best suited for throttling service?
A. Gate Valve
B. Globe Valve
C. Plug Valve
D. Check Valve
ANSWER : B
Explanation: Globe valves are specifically designed for regulating and
throttling flow.
5. A check valve is used to:
A. Regulate pressure
B. Stop reverse flow
C. Drain condensate
D. Increase velocity
ANSWER : B
Explanation: Check valves automatically prevent backflow.
6. What instrument measures pressure?
A. Thermometer
B. Flowmeter
C. Pressure Gauge
D. Hygrometer
ANSWER : C
Explanation: Pressure gauges indicate system pressure.
7. Which material is commonly used for high-temperature steam
piping?
,A. PVC
B. Copper
C. Carbon Steel
D. CPVC
ANSWER : C
Explanation: Carbon steel withstands high temperatures and pressures.
8. What is pipe schedule?
A. Installation timeline
B. Pipe wall thickness designation
C. Pressure rating only
D. Pipe length
ANSWER : B
Explanation: Schedule numbers identify pipe wall thickness.
9. What fitting allows disassembly without cutting pipe?
A. Union
B. Coupling
C. Reducer
D. Cap
ANSWER : A
Explanation: Unions allow easy maintenance and removal.
10. A reducer is used to:
A. Increase pressure
B. Change direction
C. Connect different pipe sizes
D. Stop flow
ANSWER : C
Explanation: Reducers join pipes of different diameters.
, 11. What is the formula for pipe circumference?
A. πD
B. D²
C. 2D
D. D/π
ANSWER : A
Explanation: Circumference equals pi times diameter.
12. Which weld joins two pipes end-to-end?
A. Fillet Weld
B. Groove Weld
C. Plug Weld
D. Spot Weld
ANSWER : B
Explanation: Groove welds are commonly used for butt joints.
13. What is a spool piece?
A. Pipe support
B. Prefabricated section of piping
C. Valve assembly
D. Drain connection
ANSWER : B
Explanation: Spool pieces are fabricated piping sections assembled
before installation.
14. Which fitting creates a branch connection?
A. Tee
B. Cap
C. Coupling
D. Union
ANSWER : A
1. What is the primary purpose of a pipe support?
A. Increase pressure
B. Prevent corrosion
C. Carry pipe weight and loads
D. Improve flow rate
ANSWER : C
Explanation: Pipe supports are designed to carry the weight of the pipe,
fluid, insulation, and external loads while preventing excessive stress.
2. Which fitting is used to change the direction of piping by 90
degrees?
A. Tee
B. Coupling
C. Elbow
D. Union
ANSWER : C
Explanation: A 90-degree elbow changes the direction of flow by 90
degrees.
3. What does NPS stand for in piping systems?
A. National Pipe Standard
B. Nominal Pipe Size
C. Normal Pressure Scale
D. Nominal Pressure System
,ANSWER : B
Explanation: NPS is the North American standard designation for pipe
diameter.
4. Which valve is best suited for throttling service?
A. Gate Valve
B. Globe Valve
C. Plug Valve
D. Check Valve
ANSWER : B
Explanation: Globe valves are specifically designed for regulating and
throttling flow.
5. A check valve is used to:
A. Regulate pressure
B. Stop reverse flow
C. Drain condensate
D. Increase velocity
ANSWER : B
Explanation: Check valves automatically prevent backflow.
6. What instrument measures pressure?
A. Thermometer
B. Flowmeter
C. Pressure Gauge
D. Hygrometer
ANSWER : C
Explanation: Pressure gauges indicate system pressure.
7. Which material is commonly used for high-temperature steam
piping?
,A. PVC
B. Copper
C. Carbon Steel
D. CPVC
ANSWER : C
Explanation: Carbon steel withstands high temperatures and pressures.
8. What is pipe schedule?
A. Installation timeline
B. Pipe wall thickness designation
C. Pressure rating only
D. Pipe length
ANSWER : B
Explanation: Schedule numbers identify pipe wall thickness.
9. What fitting allows disassembly without cutting pipe?
A. Union
B. Coupling
C. Reducer
D. Cap
ANSWER : A
Explanation: Unions allow easy maintenance and removal.
10. A reducer is used to:
A. Increase pressure
B. Change direction
C. Connect different pipe sizes
D. Stop flow
ANSWER : C
Explanation: Reducers join pipes of different diameters.
, 11. What is the formula for pipe circumference?
A. πD
B. D²
C. 2D
D. D/π
ANSWER : A
Explanation: Circumference equals pi times diameter.
12. Which weld joins two pipes end-to-end?
A. Fillet Weld
B. Groove Weld
C. Plug Weld
D. Spot Weld
ANSWER : B
Explanation: Groove welds are commonly used for butt joints.
13. What is a spool piece?
A. Pipe support
B. Prefabricated section of piping
C. Valve assembly
D. Drain connection
ANSWER : B
Explanation: Spool pieces are fabricated piping sections assembled
before installation.
14. Which fitting creates a branch connection?
A. Tee
B. Cap
C. Coupling
D. Union
ANSWER : A
