WorksheetsBoiler Fundamentals #4
Total questions: 25
Worksheet time: 17mins
Hot air rising and cool air sinking is an example of what?
Evaporation
Radiation
Convection
Conduction
How does heat move?
from a warmer to a cooler object
from a cooler to a warmer object
toward a hot object
away from a cold object
How is energy from the Sun transferred?
by radiation
by conduction
by convection
by the force of gravity
__________ is the transfer of heat by the movement of a fluid.
Conduction
Convection
Radiation
When you touch hot sand, heat is transferred by _________ to your skin.
conduction
convection
radiation
_____________, convection, and conduction are the three types of heat transfer.
Conveyance
Radiation
Translocation
Hot water rises and cold water sinks. This is_______.
Convection
Conduction
Radiation
A spoon in a cup of hot soup becoming warmer is an example of _________.
Convection
Conduction
Radiation
Transfer of thermal(heat) energy through "space"
conduction
convection
radiation
Heat from the Sun reaches Earth through which type of heat transfer?
Conduction
Radiation
Convection
All of the above
Soot accumulation during combustion
Will cause and increase in efficiency
will have no effect on efficiency
will cause a decrease in efficiency
none of the above
Scale accumulation on the inside of a boiler can lead to
A decrease in heat transfer
An increase in heat transfer
Will stop all heat transfer
All of the above
Deposits of calcium and magnesium carbonates on the boiler heating surface cause ___
scale
oxygen pitting
caustic embrittlement
carryover
Which boiler has flue gasses passing around the tubes and water flowing through the tubes?
Fire tube
Cast iron
Condensing
Water tube
Gases of combustion that cool on contact with the boiler heating surface before combustion is completed cause ___
a loss of draft
an increase in chimney temperature
the formation of soot and smoke
an increase in heat transfer
Soot and smoke are the result of ___ combustion
incomplete
complete
perfect
theoretical
Without a continuous supply of this, a boiler could boil dry.
water
scale
soot
fuel
A boiler's metal components (parts) may crack if the boiler is heated up too quickly.
true
false
