SPECIAL BOILER LATEST 2026 EXAM QUESTIONS AND
ANSWERS GUARANTEE A+
✔✔Internal resistance to the flow of fuel is called? - ✔✔Viscosity
✔✔What does a safety valve come "Sealed" ? - ✔✔So Pressure and capacity can not
be tampered with
✔✔In a hot water system, what removes the air? - ✔✔Air Control
✔✔What are the two scales that a pressure control has? - ✔✔Differential pressure and
cut in pressure.
✔✔On a water column, what is the minimum size drain require? - ✔✔1/2 inch
✔✔Inside a fire tube boiler, the water? - ✔✔Surrounds the tubes
✔✔The circulating pump is sometimes controlled by the? - ✔✔Thermostat
✔✔Boiler are low pressure when? - ✔✔Steam boiler are not over 15 p.s.i and water
boiler are not over 160 p.s.i and 250 degrees F.
✔✔A hot water boiler has what valve installed to reduce incoming city water pressure? -
✔✔Pressure reducing valve
✔✔The bottom blowdown line is located where on a steam boiler? - ✔✔Lowest point on
the water side.
✔✔What is the maximum size safety valve that can be installed on a low-pressure
boiler? - ✔✔4 1/2 Inches
✔✔What should you do to a out service boiler when freezing is possible? - ✔✔Dry lay-
up
✔✔How many times should you turn the slow opening valve at the bottom blow down
valve? - ✔✔5 complete turns
✔✔Possible water hammer in a steam boiler can be caused by? - ✔✔Carryover
✔✔When you are performing a hydrostatic test on a boiler the water temperature shout
be at? - ✔✔70 F
✔✔Evaporative capacity output in a steam boiler expressed in ? - ✔✔Ponds per hour
, ✔✔The three most common type of low-pressure boilers are? - ✔✔Fire tube, Cast Iron,
and Water Tube.
✔✔A manometer is what type of gauge? - ✔✔Draft
✔✔The minimum size pipe used to connect the steam gauge to a steam boiler is? -
✔✔1/4 Inch
✔✔What control is a safety backup? - ✔✔High limit control
✔✔What is used as an oxygen scavenger? - ✔✔Sodium sulfite
✔✔If two bottom blow down valves are used on a steam boiler, the valve closes to the
shell is a? - ✔✔Quick opening
✔✔Why are bottom blow down valves installed at the lowest point of a steam boiler? -
✔✔To remove sediment and sludge
✔✔The evaporation of 34.5 pounds of water per hour from, and at a temperature of 212
degrees F is defined as? - ✔✔One Boiler Horsepower
✔✔For fuel to burn, it must be heated to? - ✔✔Its ignition temperature
✔✔14.7 p.s.i plus gauge pressure is called? - ✔✔Absolute Pressure
✔✔To much draft when burning cool can lead to what? - ✔✔Too hot of a fire
✔✔A photocell senses what type of light? - ✔✔Visible
✔✔what is the first thing that should be done if the low water alarm sounds? -
✔✔Secure the burner
✔✔What is the minimum pressure when testing a safety valve by hand? - ✔✔5 p.s.i
✔✔a Scotch marine boiler is what type of boiler? - ✔✔Fire tube
✔✔What is the core of a boiler fusible plug made of? - ✔✔Tin
✔✔The viscosity of fuel oil when heated by? - ✔✔Decreases
✔✔An explosion in the can be cause by? - ✔✔Leaking gas and Improper purge
ANSWERS GUARANTEE A+
✔✔Internal resistance to the flow of fuel is called? - ✔✔Viscosity
✔✔What does a safety valve come "Sealed" ? - ✔✔So Pressure and capacity can not
be tampered with
✔✔In a hot water system, what removes the air? - ✔✔Air Control
✔✔What are the two scales that a pressure control has? - ✔✔Differential pressure and
cut in pressure.
✔✔On a water column, what is the minimum size drain require? - ✔✔1/2 inch
✔✔Inside a fire tube boiler, the water? - ✔✔Surrounds the tubes
✔✔The circulating pump is sometimes controlled by the? - ✔✔Thermostat
✔✔Boiler are low pressure when? - ✔✔Steam boiler are not over 15 p.s.i and water
boiler are not over 160 p.s.i and 250 degrees F.
✔✔A hot water boiler has what valve installed to reduce incoming city water pressure? -
✔✔Pressure reducing valve
✔✔The bottom blowdown line is located where on a steam boiler? - ✔✔Lowest point on
the water side.
✔✔What is the maximum size safety valve that can be installed on a low-pressure
boiler? - ✔✔4 1/2 Inches
✔✔What should you do to a out service boiler when freezing is possible? - ✔✔Dry lay-
up
✔✔How many times should you turn the slow opening valve at the bottom blow down
valve? - ✔✔5 complete turns
✔✔Possible water hammer in a steam boiler can be caused by? - ✔✔Carryover
✔✔When you are performing a hydrostatic test on a boiler the water temperature shout
be at? - ✔✔70 F
✔✔Evaporative capacity output in a steam boiler expressed in ? - ✔✔Ponds per hour
, ✔✔The three most common type of low-pressure boilers are? - ✔✔Fire tube, Cast Iron,
and Water Tube.
✔✔A manometer is what type of gauge? - ✔✔Draft
✔✔The minimum size pipe used to connect the steam gauge to a steam boiler is? -
✔✔1/4 Inch
✔✔What control is a safety backup? - ✔✔High limit control
✔✔What is used as an oxygen scavenger? - ✔✔Sodium sulfite
✔✔If two bottom blow down valves are used on a steam boiler, the valve closes to the
shell is a? - ✔✔Quick opening
✔✔Why are bottom blow down valves installed at the lowest point of a steam boiler? -
✔✔To remove sediment and sludge
✔✔The evaporation of 34.5 pounds of water per hour from, and at a temperature of 212
degrees F is defined as? - ✔✔One Boiler Horsepower
✔✔For fuel to burn, it must be heated to? - ✔✔Its ignition temperature
✔✔14.7 p.s.i plus gauge pressure is called? - ✔✔Absolute Pressure
✔✔To much draft when burning cool can lead to what? - ✔✔Too hot of a fire
✔✔A photocell senses what type of light? - ✔✔Visible
✔✔what is the first thing that should be done if the low water alarm sounds? -
✔✔Secure the burner
✔✔What is the minimum pressure when testing a safety valve by hand? - ✔✔5 p.s.i
✔✔a Scotch marine boiler is what type of boiler? - ✔✔Fire tube
✔✔What is the core of a boiler fusible plug made of? - ✔✔Tin
✔✔The viscosity of fuel oil when heated by? - ✔✔Decreases
✔✔An explosion in the can be cause by? - ✔✔Leaking gas and Improper purge
