Boilers Quiz Flashcards
Where would you find downcomer tubes?
in watertube boilers
Non-return valves are to be located as ____ to the boiler as possibe.
Close
“On a fire tube boiler, tubes are attached to the tube sheet by what method?”
Rolled and Beaded
Superheated steam would be best defined as?
Steam with a temperature above its corresponding pressure.
What is the Btu content of natural gas?
100,000 Btu/therm
What boiler should never have an accumulation test done on it.
a boiler equipped with a superheater
Which of the following could cause a superheater tube to overheat?
poor boiler circulation
A 2-1/2 inch boiler tube has a wall thickness of 3/16 of an inch, what is the inside diameter?
2-1/8 inches
How many different basic types of boilers are there?
3
What is the function of a dry pipe?
remove moisture from the steam drum
What section of the ASME code would the U stamp appear?
Section VIII
What is the primary function of the steam separators?
Separate moisture
What best defines a boiler horsepower ?
The evaporation of 34.5 lbs. of water from and at 212 degrees in one hour.
What is the most critical operation that must be maintained with a superheater?
Steam flow
What section of the ASME code should low-pressure boilers comply with?
Section IV
What basic type of force does a cyclone separator use to work?
Centrifugal force
What prevents superheater tubes from warping and burning out?
by keeping a continuous flow of steam through the superheater tubes
A gradual increase in stack temperature could indicate what condition in the boiler?
heating surface fouling
The transfer of heat from a warm molecule to a cold one would be considered?
Conduction
A boiler that has water inside of the tubes and heated gases on the outside would be considered what type of boiler?
Watertube boiler.
