Page 1 of 82
Wilcox Final Exam Questions And
Answers | Latest 2026
Question 1
A boiler is rated at 154 BHP and has a factor of evaporation of
1.06. This boiler produces approximately how many pounds of
steam per hour?
A) 5,000
B) 10,000
C) 15,000
D) 20,000
Answer: A) 5,000
Rationale: Boiler horsepower (BHP) × 34.5 lb/hr × factor of
evaporation = steam production. 154 × 34.5 × 1.06 ≈ 5,000
lb/hr .
,Page 2 of 82
Question 2
In a watertube boiler, the heat and gases of combustion pass:
A) Around the tubes
B) Through the water walls
C) Through the water legs
D) Through the tubes
Answer: A) Around the tubes
Rationale: In a watertube boiler, water circulates inside the
tubes while hot combustion gases pass around the outside of the
tubes to transfer heat .
Question 3
A straight-tube watertube boiler with two hundred fifty 3-inch
diameter tubes that are 14 feet long has how many square feet
of heating surface?
A) 2,500
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B) 2,750
C) 10,000
D) 32,000
Answer: B) 2,750
Rationale: Heating surface = number of tubes × circumference
(π × diameter in feet) × length. 250 × (π × 0.25 ft) × 14 ft ≈
2,750 sq ft .
Question 4
A boiler that has a factor of evaporation of 1.06 and is rated at
550 BHP produces approximately how many pounds of steam
per hour?
A) 16,000
B) 583
C) 17,500
D) 20,000
, Page 4 of 82
Answer: D) 20,000
Rationale: 550 BHP × 34.5 lb/hr × 1.06 = approximately
20,000 lb/hr .
Question 5
The ASME code states that the water column connections to the
boiler must be at least how many inches in diameter?
A) 0.5
B) 0.75
C) 1
D) 1.5
Answer: C) 1
Rationale: ASME BPVC Section I requires water column
connections be at least 1 inch in diameter to ensure proper water
level response and prevent plugging .
Wilcox Final Exam Questions And
Answers | Latest 2026
Question 1
A boiler is rated at 154 BHP and has a factor of evaporation of
1.06. This boiler produces approximately how many pounds of
steam per hour?
A) 5,000
B) 10,000
C) 15,000
D) 20,000
Answer: A) 5,000
Rationale: Boiler horsepower (BHP) × 34.5 lb/hr × factor of
evaporation = steam production. 154 × 34.5 × 1.06 ≈ 5,000
lb/hr .
,Page 2 of 82
Question 2
In a watertube boiler, the heat and gases of combustion pass:
A) Around the tubes
B) Through the water walls
C) Through the water legs
D) Through the tubes
Answer: A) Around the tubes
Rationale: In a watertube boiler, water circulates inside the
tubes while hot combustion gases pass around the outside of the
tubes to transfer heat .
Question 3
A straight-tube watertube boiler with two hundred fifty 3-inch
diameter tubes that are 14 feet long has how many square feet
of heating surface?
A) 2,500
,Page 3 of 82
B) 2,750
C) 10,000
D) 32,000
Answer: B) 2,750
Rationale: Heating surface = number of tubes × circumference
(π × diameter in feet) × length. 250 × (π × 0.25 ft) × 14 ft ≈
2,750 sq ft .
Question 4
A boiler that has a factor of evaporation of 1.06 and is rated at
550 BHP produces approximately how many pounds of steam
per hour?
A) 16,000
B) 583
C) 17,500
D) 20,000
, Page 4 of 82
Answer: D) 20,000
Rationale: 550 BHP × 34.5 lb/hr × 1.06 = approximately
20,000 lb/hr .
Question 5
The ASME code states that the water column connections to the
boiler must be at least how many inches in diameter?
A) 0.5
B) 0.75
C) 1
D) 1.5
Answer: C) 1
Rationale: ASME BPVC Section I requires water column
connections be at least 1 inch in diameter to ensure proper water
level response and prevent plugging .
