Boiler License Test 2025 Latest Prep Test Bank With 250 Questions and Correct Verified Answers/ Boiler Operator License Exam 2025 Practice Test (Brand New!)

Boiler License Test 2025 Latest Prep Test
Bank With 250 Questions and Correct
Verified Answers/ Boiler Operator License
Exam 2025 Practice Test (Brand New!)

1. A boiler is rated at 154BHP and has a factor of evaporation of 1.06. This boiler
produces approximately evaporation of 1.06. This boiler produces
APPROXIMATELY _____ LB. OF STEAM/HR.
A. 5,000
B. 10,000
C. 15,000
D. 20,000
A. 5,000
2. Before lighting off a boiler during a cold startup, the operator must first _____.
A. Check for the correct water level
B. Open the boiler vent
C. close the boiler vent
D. Open the air dampers
A. Check for the correct water level
3. A neutral solution is _____ on the pH scale.
A.0.0
B. 7.0
C.8.3
D. 11.0
B 7.0
4. A (n) _____ test is used to determine smoke density
A. pH
B. Ringelmann
C. MATT
D. Orsat


pg. 1

,B. Ringelmann
5. A steam pressure gauge has a _____ between the boiler and the pressure gauge
to protect the gauge.
A.siphon
B. Strainer
C. Water column
D. Vent
A. Siphon
6. Draft is measured with a _____.
A. Bourdon Tube
B. Hydrometer
C. Manometer
D. Viscometer
C. Manometer
7. IN an inverted bucket steam trap, the bucket _____ as the trap fills with
condensate.
A. Rotates
B. Sinks
C. Rises
D. Tilts
B. Sinks
8. A hole is drilled in the end of a stay bolt to _____.
A. Warn of a corroded stay
B. Increase strength
C. Allow for expansion and contraction
D. Increase Corrosion resistance
A. Warn of a corroded stay
9. When coal is classified, _____ refers to hardness.
A. Volatiles
B. Clinker
C. Grade
D. Rank



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,D. Rank
10. A higher than normal oxygen (o2) reading in the gases of combustion may
result from _____.
A. Complete combustion
B. Stoichiometric
C. Too much excess air
D. Poor electrostatic precipitator operation
C. Too much excess air
11. An economizer uses heat from the _____ to heat feed water.
A. Gases of combustion
B. Superheater
C. Desuperheater
D. Live steam
A. Gases of combustion
12. A straight-tube watertube boiler with one hundred 3" diameter tubes that are
12' long has _____ sq. ft. of heating surface.
A. 471
B. 942
C. 8,482
D. 33,929
B. 942
13. ______ are necessary for complete combustion.
A. Forced draft, air, time, and temperature
B. Mixture, atomization, time, and temperature
C. Time, temperature, and draft
D. Heat, draft, and turbulence
B. Mixture, atomization, time, temperature
14. A centrifugal pump that pumps55 gpm of water against a discharge head of 280
ft. uses _____ HP. Do not follow for friction losses or pump slip
A. 2
B. 4
C. 6
D. 8

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, B. 4
15. Overfire air is the _____ air introduced over the fire in solid fuel-fired furnace.
A. Primary
B. Secondary
C. Combustion
D. Atomizing
B. Secondary
16. A steam trap has an inlet pressure of 5 psig and an outlet pressure of 3 in. Hg
(vacuum). The pressure drop across the trap is _____ psi.
A. 2
B. 3.5
C. 6.5
D. 8
C. 6.5
17. As the steam pressure in a boiler increases, there is a corresponding in the
_____.
A. Steam volume
B. Water level
C. BHP
D. Steam temperature
D. Steam temperature
18. Approximately _____ Btu are required to raise the temperature of 50 gal. of
water from 50F to 120F.
A. 3,500
B. 24,155
C. 29,155
D. 48,515
C. 29,155
19. A temperature reading of 176F is equal to _____C.
A. 66.7
B. 74.3
C. 80
D. 97.8

pg. 4