answers
_____ storage is preferable for boilers that are out of service for an
extended period of time or in locations where freezing temperatures
during the standby are expected.
Select one:
a.Dry
b.Short
c.Wet
d.Long Ans✓✓✓ a.Dry
______ is particularly harmful as it forms a very hard deposit on turbine
blades.
Select one:
a.Carryover
b.Mist
c.Silica
d.Phosphate Ans✓✓✓ c.Silica
________ boilers must be built or put together in the field (field
erected).
Select one:
a.Recovery
b.Sectional
,c.Larger
d.Package Ans✓✓✓ c.Larger
________ boilers must be built or put together in the field (field
erected).
a. Recovery
b. Sectional
c. Larger
d. Package Ans✓✓✓ c. Larger
________ is the result of dissolved air or oxygen in the feedwater.
Select one:
a.Scale
b.Pitting
c.Cracking
d.Bulging Ans✓✓✓ b.Pitting
_________ explosions occur when a pressure part of the boiler, such as
the steam drum, fails due to steam pressure or a structural weakening of
the metal.
Select one:
a.Furnace
b.Pressure
c.Gas
,d.Water Ans✓✓✓ b.Pressure
_________ is any solid, liquid, or vaporous contaminants that leave the
boiler with the steam.
Select one:
a.Carryover
b.Blowdown
c.Feedwater
d.Mist Ans✓✓✓ a.Carryover
_________ tubes have no welded joints.
Select one:
a.Boiler
b.Superheater
c.Seamless
d.Cold Ans✓✓✓ c.Seamless
_________ tubes have no welded joints.
a. Boiler
b. Superheater
c. Seamless
d. Cold Ans✓✓✓ c. Seamless
, __________ is accomplished by passing water through a basin or tank of
such design that the velocity of the water is reduced to a point where the
impurities sink to the bottom.
Select one:
a.Settling
b.Coagulation
c.Flocculation
d.Filtering Ans✓✓✓ a.Settling
__________ is cement like. It is used to withstand very high
temperatures in areas such as burner throats and boiler target walls.
a. Refractory
b. Insulation
c. Cladding
d. Casing Ans✓✓✓ a. Refractory
__________ is cement-like and is used to withstand very high
temperatures in areas such as burner throats and boiler target walls.
Select one:
a.Refractory
b.Insulation
c.Cladding
d.Casing Ans✓✓✓ a.Refractory