OHIO BOILER LICENSING EXAM 2024 SOLVED AND UPDATED #20
Which type of heat transfer takes place by actual physical contact, from molecule to
molecule, without displacing the molecules? - correct answer Conduction
When designing a boiler, special consideration must be given to heat transmision by? -
correct answer Radiation, conduction, and convection
What parts make up the heating surface in a scotch marine firetube boiler? - correct
answer The flue and the tubes
Which type of boiler is the most econimical to build? - correct answer Firetube
A boiler is an industrial boiler when? - correct answer the steam generated is used for a
process
What is true about an industrial boiler as compared to a utility boiler? - correct answer
industrial boilers operate at lower pressures and temperatures
Utility boilers are primarily used to produce? - correct answer high pressure steam to
drive turbines that make electricity
What is not a type of firetube boiler? - correct answer Stirling
What is an example of a cogneration system? - correct answer exhaust gases from a
combustion turbine-driven generator are used to make steam in a boiler for a secondary
purpose
If the tubes in a boiler are expanded during installation, what will be true? - correct
answer the ID is increased
When a new tube is installed in a firetube boiler, What happens to the tube? - correct
answer The ID is increased
What is the minimum size of an elliptical manhole on a boiler - correct answer 11"x15"
What is the minimum temperatrue of water to be used for a hydrostatic test? - correct
answer 70 degrees
How many sq ft of heating surface are required to produce 1 hp in a HRT firetube
boiler? - correct answer 12
How many sq ft of heating surface are required to produce 1 hp in a vertical firetube
boiler? - correct answer 14
, How many sq ft of heating surface are required to produce 1 hp in a watertube boiler? -
correct answer 10
If a high pressure boiler is at its highest operation pressure below MAWP. Where will
the pointer on the pressure gague be? - correct answer 12 o' clock
(LP) a gauge that reads higher than the actual boiler pressure is called a? - correct
answer fast gauge
Which is true about a boiler pressure mercury switch? - correct answer must be
installed with pigtail siphon vertically
(LP) on low pressure boiler, cutout equals:? - correct answer cut in plus differential
(LP) on a low pressure boiler, the pressure switch is installed: - correct answer vertical
with high point up
What is the maximum blowback on a saftey relief valve that is set for 100 psig? - correct
answer 4 psig
If a high pressure boiler operated at 100 psig, what should be the blowback of the safety
valve? - correct answer not more than 4% and not less than 2 psig in any case
What is the minimum blowback on a safety valve that pops at 250psi - correct answer
5psi.
(LP) a data plate on a safety valve on a low pressure boiler is marked 6900lb, this refers
to? - correct answer lb/hr capacity of the safety valve
When an accumulation test is performed, the boiler is fired at? - correct answer Max
firing rate with the main steam stop valve closed
A safety valve is set on a 50 psi boiler system, what is the maximum pressure that may
be developed during safety valve blowdown? - correct answer 53 psi
Oils and solids accumulation on the water surface in the boiler can lead to what
condition? - correct answer foaming
If the water in a boiler is foaming, the water level indication in the gauge glass will be? -
correct answer erratic
A boiler has carried a large slug of water over into the steam. This condition is called? -
correct answer Priming
How do steam separators work - correct answer they cause a sudden change in
direction that throws the water out
Which type of heat transfer takes place by actual physical contact, from molecule to
molecule, without displacing the molecules? - correct answer Conduction
When designing a boiler, special consideration must be given to heat transmision by? -
correct answer Radiation, conduction, and convection
What parts make up the heating surface in a scotch marine firetube boiler? - correct
answer The flue and the tubes
Which type of boiler is the most econimical to build? - correct answer Firetube
A boiler is an industrial boiler when? - correct answer the steam generated is used for a
process
What is true about an industrial boiler as compared to a utility boiler? - correct answer
industrial boilers operate at lower pressures and temperatures
Utility boilers are primarily used to produce? - correct answer high pressure steam to
drive turbines that make electricity
What is not a type of firetube boiler? - correct answer Stirling
What is an example of a cogneration system? - correct answer exhaust gases from a
combustion turbine-driven generator are used to make steam in a boiler for a secondary
purpose
If the tubes in a boiler are expanded during installation, what will be true? - correct
answer the ID is increased
When a new tube is installed in a firetube boiler, What happens to the tube? - correct
answer The ID is increased
What is the minimum size of an elliptical manhole on a boiler - correct answer 11"x15"
What is the minimum temperatrue of water to be used for a hydrostatic test? - correct
answer 70 degrees
How many sq ft of heating surface are required to produce 1 hp in a HRT firetube
boiler? - correct answer 12
How many sq ft of heating surface are required to produce 1 hp in a vertical firetube
boiler? - correct answer 14
, How many sq ft of heating surface are required to produce 1 hp in a watertube boiler? -
correct answer 10
If a high pressure boiler is at its highest operation pressure below MAWP. Where will
the pointer on the pressure gague be? - correct answer 12 o' clock
(LP) a gauge that reads higher than the actual boiler pressure is called a? - correct
answer fast gauge
Which is true about a boiler pressure mercury switch? - correct answer must be
installed with pigtail siphon vertically
(LP) on low pressure boiler, cutout equals:? - correct answer cut in plus differential
(LP) on a low pressure boiler, the pressure switch is installed: - correct answer vertical
with high point up
What is the maximum blowback on a saftey relief valve that is set for 100 psig? - correct
answer 4 psig
If a high pressure boiler operated at 100 psig, what should be the blowback of the safety
valve? - correct answer not more than 4% and not less than 2 psig in any case
What is the minimum blowback on a safety valve that pops at 250psi - correct answer
5psi.
(LP) a data plate on a safety valve on a low pressure boiler is marked 6900lb, this refers
to? - correct answer lb/hr capacity of the safety valve
When an accumulation test is performed, the boiler is fired at? - correct answer Max
firing rate with the main steam stop valve closed
A safety valve is set on a 50 psi boiler system, what is the maximum pressure that may
be developed during safety valve blowdown? - correct answer 53 psi
Oils and solids accumulation on the water surface in the boiler can lead to what
condition? - correct answer foaming
If the water in a boiler is foaming, the water level indication in the gauge glass will be? -
correct answer erratic
A boiler has carried a large slug of water over into the steam. This condition is called? -
correct answer Priming
How do steam separators work - correct answer they cause a sudden change in
direction that throws the water out
