Chapter 3 Cast Iron Sectional & Modular Boilers

Question 1

Cast-iron sectional boilers have flue gas passages which

a) are often termed ‘breeching’
b) increase heat transfer
c) receive radiant heat only
d) act as boiler water legs

Answer 1

increase heat transfer

Question 2

a machined and slightly tapered piece of pipe found in sectional heating boilers is referred to as a:

a) tie rod
b) tapered bushing
c) push nipple
d) cleanout nipple

Answer 2

push nipple

Question 3

An advantage of a cast iron boiler is:

a) its large capacity
b) light weight resulting in lesser foundation requirements
c) its ability to withstand high pressure
d) the choice of assembly location

Answer 3

the choice of assembly location

Question 4

Small capacity heating boilers operate most efficiently at

a) continuous full load
b) any type of load
c) approximately 75% load
d) approximately 66% load

Answer 4

continuous full load

Question 5

A modular cast-iron heating boiler

a) has a number of burners that start and stop simultaneously
b) consists of a number of individually operated sectional boilers
c) cannot be enclosed in a single casing
d) does not have continuous water flow through each module

Answer 5

consists of a number of individually operated sectional boilers

Question 6

Cast-iron boiler sections maximize heat transfer by:

a) using four push nipples per section
b) vertical firing
c) exposing as large a surface as possible to the hot gases
d) utilizing an external furnace

Answer 6

exposing as large a surface as possible to the hot gases

Question 7

Name all of the advantages of a Cast Iron Boiler.

SHORT ANSWER QUESTION

Answer 7

High resistance to corrosion, ease of assembly, choice of assembly location, and possibility of enlarging boiler capacity.