Exam (elaborations)
BOILER EXAM FULLY SOLVED AND APPROVED #11
- Module
- MN BOILER EXM
- Institution
- MN BOILER EXM
BOILER EXAM FULLY SOLVED AND APPROVED #11
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BOILER EXAM FULLY SOLVED AND APPROVED #11In a hot water heating boiler system, the unit that turns the burner on and based on
water temperature is the ________ - correct answer Aquastat
A ______ boiler is a boiler in which the heat and gasses of the combustion pass through
tubes surrounded by water. - correct answer Fire tube
What are the three ways that heat is transferred in a boiler? - correct answer Radiation,
convection, and conduction
After a satisfactory test of the low water cut off on a hot water boiler, the boiler will
______ - correct answer Only restart after the operator has reset the control
High pressure boilers are classified as such because the operating pressure is above
__________ - correct answer 15 psi for steam or 160 psi for hot water heating
When in operation, a high pressure boiler of 25 horsepower must be checked at least
_________ - correct answer every 24 hours
What is the purpose of a compression tank (expansion tank) for a hot water heating
boiler system? - correct answer Allows expansion and contraction of the water volume
as its temperature varies
When a boiler is to be drained for cleaning and/or inspection, it should be cooled
_________ - correct answer Slowly
This type of boiler is designed to recover some of the heat from water vapor normally
discharged to the atmosphere in the gasses of combustion. - correct answer
Condensing
When water is heated at atmospheric pressure and its temperature is raised from 70 to
150 degrees Fahrenheit, the water _________ - correct answer Expands
Deaerators perform what functions? - correct answer Remove air and non-condensable
gasses from boiler feedwater
A __________ on a fire tube boiler is a good indication that the boiler has soot or scale
on the tube. - correct answer High stack temperature
The dial of the steam gauge on a steam boiler must be graduated to not less than
________ the safety valve setting. - correct answer Two times
On a steam boiler system, what is the first thing a boiler operator should do when
entering a boiler room? - correct answer Check the water level in the boiler
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