2026 Journeyman Plumbing
Certification Practice
Exam|||questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Total Questions: 85
Passing Score: 70% (60 correct)
Time Allowed: 3 hours
Exam Type: Open/Closed book (simulates closed-book knowledge + code
reference)
Section 1: Plumbing Math & Measurements (Questions 1–12)
1. A drainage pipe drops ½ inch per foot of run. What is the slope in percent?
A) 2.08%
B) 4.17%
C) 4.17% (Correct – 0.5/12×100=4.170.5/12×100=4.17)
D) 6.25%
Rationale: Percent slope = (rise in inches ÷ run in inches) × 100. Rise 0.5”, run 12”
→ 0.5/12=0.04167×100=4.17%.
2. Convert 40 psi to feet of head.
A) 17.3 ft
B) 40 ft
C) 92.4 ft
D) 102 ft
Rationale: 1 psi = 2.31 ft head. 40 × 2.31 = 92.4 ft.
3. A rectangular tank is 4 ft wide, 6 ft long, and 5 ft deep. How many gallons does
it hold? (1 cu ft = 7.48 gal)
,A) 120 gal
B) 448.8 gal
C) 897.6 gal
D) 1,200 gal
Rationale: Volume = 4×6×5=120 cu ft. 120×7.48=897.6 gal.
4. What is the area of a 4-inch diameter pipe in square inches?
A) 12.56 sq in
B) 12.56 sq in (Correct)
C) 25.12 sq in
D) 50.24 sq in
Rationale: Area = πr². r=2”, 3.14×4=12.56 sq in.
5. A 2-inch pipe at 5 fps flow has a flow rate of _____ gpm. (1 cu ft = 7.48 gal,
area of 2” pipe ≈ 0.0218 sq ft)
A) 10.2 gpm
B) 20.4 gpm
C) 40.8 gpm
D) 48.9 gpm
Rationale: Q = A×V. 0.0218 sq ft × 5 fps = 0.109 cfs; 0.109×7.48×60 = 48.9 gpm.
6. What is the total fall for a 50-ft sewer pipe at ¼ inch per foot slope?
A) 6.25 inches
B) 10 inches
C) 12.5 inches
D) 25 inches
Rationale: 0.25”/ft × 50 ft = 12.5 inches.
7. A water heater is rated 40,000 BTU/hr. How many kW is that? (1 kW = 3,412
BTU)
A) 5.9 kW
B) 8.5 kW
C) 11.7 kW
D) 15.3 kW
Rationale: 40,000 ÷ 3,412 = 11.72 kW.
8. 3/8 inch expressed in decimal feet is:
A) 0.03125 ft
B) 0.03125 ft (Correct)
C) 0.125 ft
, D) 0.375 ft
Rationale: 3/8=0.375 inches ÷12 = 0.03125 ft.
9. A pump discharges 300 gallons in 4 minutes. What is the gpm?
A) 60 gpm
B) 75 gpm
C) 90 gpm
D) 100 gpm
Rationale: 300/4=75 gpm.
10. A ¾-inch copper tube (Type L) has an outside diameter of:
A) 0.750”
B) 0.875”
C) 0.875” (Correct)
D) 1.000”
Rationale: Actual OD for ¾” copper is 7/8” (0.875”).
11. Water weighs 62.4 lbs per cu ft. What is the weight of water in a 10-ft high
column of 2-inch diameter pipe?
A) 10.2 lbs
B) 13.6 lbs
C) 13.6 lbs (Correct)
D) 27.2 lbs
Rationale: Volume = π×r²×h = 3.14×(1/12)²×10 = 0.218 cu ft; ×62.4=13.6 lbs.
12. What is the length of travel for a 45-degree offset if the advance is 10 inches?
A) 7.07 inches
B) 10 inches
C) 14.14 inches
D) 20 inches
Rationale: Travel = offset × 1.414 = 10×1.414.
Section 2: Plumbing Fixtures & Appliances (Questions 13–24)
13. Minimum trap size for a residential kitchen sink per IPC 2024:
A) 1¼ inch
B) 1½ inch
C) 2 inch
Certification Practice
Exam|||questions and answers with
rationales/graded A+/2026
update/100% correct /instant
download
Total Questions: 85
Passing Score: 70% (60 correct)
Time Allowed: 3 hours
Exam Type: Open/Closed book (simulates closed-book knowledge + code
reference)
Section 1: Plumbing Math & Measurements (Questions 1–12)
1. A drainage pipe drops ½ inch per foot of run. What is the slope in percent?
A) 2.08%
B) 4.17%
C) 4.17% (Correct – 0.5/12×100=4.170.5/12×100=4.17)
D) 6.25%
Rationale: Percent slope = (rise in inches ÷ run in inches) × 100. Rise 0.5”, run 12”
→ 0.5/12=0.04167×100=4.17%.
2. Convert 40 psi to feet of head.
A) 17.3 ft
B) 40 ft
C) 92.4 ft
D) 102 ft
Rationale: 1 psi = 2.31 ft head. 40 × 2.31 = 92.4 ft.
3. A rectangular tank is 4 ft wide, 6 ft long, and 5 ft deep. How many gallons does
it hold? (1 cu ft = 7.48 gal)
,A) 120 gal
B) 448.8 gal
C) 897.6 gal
D) 1,200 gal
Rationale: Volume = 4×6×5=120 cu ft. 120×7.48=897.6 gal.
4. What is the area of a 4-inch diameter pipe in square inches?
A) 12.56 sq in
B) 12.56 sq in (Correct)
C) 25.12 sq in
D) 50.24 sq in
Rationale: Area = πr². r=2”, 3.14×4=12.56 sq in.
5. A 2-inch pipe at 5 fps flow has a flow rate of _____ gpm. (1 cu ft = 7.48 gal,
area of 2” pipe ≈ 0.0218 sq ft)
A) 10.2 gpm
B) 20.4 gpm
C) 40.8 gpm
D) 48.9 gpm
Rationale: Q = A×V. 0.0218 sq ft × 5 fps = 0.109 cfs; 0.109×7.48×60 = 48.9 gpm.
6. What is the total fall for a 50-ft sewer pipe at ¼ inch per foot slope?
A) 6.25 inches
B) 10 inches
C) 12.5 inches
D) 25 inches
Rationale: 0.25”/ft × 50 ft = 12.5 inches.
7. A water heater is rated 40,000 BTU/hr. How many kW is that? (1 kW = 3,412
BTU)
A) 5.9 kW
B) 8.5 kW
C) 11.7 kW
D) 15.3 kW
Rationale: 40,000 ÷ 3,412 = 11.72 kW.
8. 3/8 inch expressed in decimal feet is:
A) 0.03125 ft
B) 0.03125 ft (Correct)
C) 0.125 ft
, D) 0.375 ft
Rationale: 3/8=0.375 inches ÷12 = 0.03125 ft.
9. A pump discharges 300 gallons in 4 minutes. What is the gpm?
A) 60 gpm
B) 75 gpm
C) 90 gpm
D) 100 gpm
Rationale: 300/4=75 gpm.
10. A ¾-inch copper tube (Type L) has an outside diameter of:
A) 0.750”
B) 0.875”
C) 0.875” (Correct)
D) 1.000”
Rationale: Actual OD for ¾” copper is 7/8” (0.875”).
11. Water weighs 62.4 lbs per cu ft. What is the weight of water in a 10-ft high
column of 2-inch diameter pipe?
A) 10.2 lbs
B) 13.6 lbs
C) 13.6 lbs (Correct)
D) 27.2 lbs
Rationale: Volume = π×r²×h = 3.14×(1/12)²×10 = 0.218 cu ft; ×62.4=13.6 lbs.
12. What is the length of travel for a 45-degree offset if the advance is 10 inches?
A) 7.07 inches
B) 10 inches
C) 14.14 inches
D) 20 inches
Rationale: Travel = offset × 1.414 = 10×1.414.
Section 2: Plumbing Fixtures & Appliances (Questions 13–24)
13. Minimum trap size for a residential kitchen sink per IPC 2024:
A) 1¼ inch
B) 1½ inch
C) 2 inch
