High Pressure Boilers Midterm Exam with answers

High Pressure Boilers Midterm Exam with answers


A low pressure boiler operates at a pressure of not more than __________ psi - ** VERIFIED
ANSWERS **✔✔- 15



If a boiler operates at 100 hp, how much steam production is that equal to? - ** VERIFIED
ANSWERS **✔✔- 3450 lb/hr

34.5 x 100



As steam pressure increases, there is a corresponding increase in __________ - ** VERIFIED
ANSWERS **✔✔- temperature



At what temperature does water boil and turn into steam? - ** VERIFIED ANSWERS **✔✔- 212 F



Combustion efficiency is the ratio of heat absorbed by boiler output to the heat available in the fuel
impact - ** VERIFIED ANSWERS **✔✔- false



__________ stress occurs when two forces of equal intensity at parallel to each other but in opposite
direction - ** VERIFIED ANSWERS **✔✔- shear



Water tube boilers are equipped with __________ to increase the heating surface - ** VERIFIED
ANSWERS **✔✔- waterwalls



In a fire tube boiler, gases pass through the __________ - ** VERIFIED ANSWERS **✔✔- tubes



What is the highest design pressure water tube boilers can operate at? - ** VERIFIED ANSWERS
**✔✔- 3206 psi



All fire tube boilers have a mud drum - ** VERIFIED ANSWERS **✔✔- false

, A high pressure boiler operates at a steam pressure higher than __________ psi - ** VERIFIED
ANSWERS **✔✔- 15



A __________ does not require a burner because it uses hot waste gases from another process - **
VERIFIED ANSWERS **✔✔- HRSG



In a water tube boiler, cold water circulates from the __________ to the riser tubes - ** VERIFIED
ANSWERS **✔✔- downcomers



A combined cycle plant sells their steam and electricity - ** VERIFIED ANSWERS **✔✔- false



The purpose of a baffle plate is to __________ - ** VERIFIED ANSWERS **✔✔- used to direct gas so
they make with boiler heating surface



If a baffle plate fails, what two things can occur in a boiler - ** VERIFIED ANSWERS **✔✔- can
cause refractory to crack

- high nox



Fire tube boilers can be field erected - ** VERIFIED ANSWERS **✔✔- false



Field erected boilers offer what advantage over packaged boilers - ** VERIFIED ANSWERS **✔✔-
field erected produces more steam then packaged



Name the three types of bent tube water tube boilers - ** VERIFIED ANSWERS **✔✔- A type

- O type

- D type



Name two pieces of equipment that adds efficiency to a boiler - ** VERIFIED ANSWERS **✔✔-
economizer

- baffles