APPROXIMATELY _____ LB. OF STEAMHR.

pg. 1 Boiler License Test 2025 Latest Prep Test Bank With 250 Questions and Correct Verified Answers/ Boiler Operator License Exam 2025 Practice Test (Brand New!)

• 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

• Before lighting off a boiler during a cold startup, the operator must first _____.
• Check for the correct water level
• Open the boiler vent
• close the boiler vent
• Open the air dampers
• Check for the correct water level
• A neutral solution is _____ on the pH scale.

A.0.0

B. 7.0

C.8.3

D. 11.0

B 7.0

• A (n) _____ test is used to determine smoke density
• pH
• Ringelmann

C. MATT

• Orsat 1 / 4

pg. 2

• Ringelmann
• A steam pressure gauge has a _____ between the boiler and the pressure gauge

to protect the gauge.A.siphon

• Strainer
• Water column
• Vent
• Siphon
• Draft is measured with a _____.
• Bourdon Tube
• Hydrometer
• Manometer
• Viscometer
• Manometer
• IN an inverted bucket steam trap, the bucket _____ as the trap fills with

condensate.

• Rotates
• Sinks
• Rises
• Tilts
• Sinks
• A hole is drilled in the end of a stay bolt to _____.
• Warn of a corroded stay
• Increase strength
• Allow for expansion and contraction
• Increase Corrosion resistance
• Warn of a corroded stay
• When coal is classified, _____ refers to hardness.
• Volatiles
• Clinker
• Grade
• Rank 2 / 4

pg. 3

• Rank
• A higher than normal oxygen (o2) reading in the gases of combustion may

result from _____.

• Complete combustion
• Stoichiometric
• Too much excess air
• Poor electrostatic precipitator operation
• Too much excess air
• An economizer uses heat from the _____ to heat feed water.
• Gases of combustion
• Superheater
• Desuperheater
• Live steam
• Gases of combustion
• 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

• ______ are necessary for complete combustion.
• Forced draft, air, time, and temperature
• Mixture, atomization, time, and temperature
• Time, temperature, and draft
• Heat, draft, and turbulence
• Mixture, atomization, time, temperature
• 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

• 2
• 4
• 6

D. 8 3 / 4

pg. 4

• 4
• Overfire air is the _____ air introduced over the fire in solid fuel-fired furnace.
• Primary
• Secondary
• Combustion
• Atomizing
• Secondary
• 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.

• 2

B. 3.5

C. 6.5

• 8

C. 6.5

• As the steam pressure in a boiler increases, there is a corresponding in the

_____.

• Steam volume
• Water level

C. BHP

• Steam temperature
• Steam temperature
• 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

• A temperature reading of 176F is equal to _____C.

A. 66.7

B. 74.3

• 80
• 97.8
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