BLRS 6005 - Cast-Iron Sectional and Modular Boilers (Chp 2)

Question 1

Two methods of assembling a cast iron sectional boiler are:
A) Capscrews and nuts
B) Clamps and over center locks
C) Short and long tie rods
D) Cable ties and winch
E) Flange bolts and gaskets

Answer 1

C) Short and long tie rods

Note: methods of assembling a cast iron sectional boiler

Question 2

The fins cast on the flat surface of the sections of a cast iron sectional boiler are used for the purpose of increasing the:
A) Water capacity
B) Water circulation
C) Steam output
D) Heat transfer effectiveness
E) Steam capacity

Answer 2

D) Heat transfer effectiveness

Question 3

The sections of cast iron boilers are mainly designed to obtain maximum:
A) Steam output
B) Water space
C) Steam space
D) Water circulation
E) Heat transfer

Answer 3

E) Heat transfer

Question 4

“Cast iron boiler” section watersides are ''connected and sealed'' by:
A) Threaded connections
B) Pipe plugs
C) Tapered push nipples
D) Flanges
E) Polished surfaces

Answer 4

C) Tapered push nipples

Note: Cast Iron Boiler Sections

Question 5

The capacity of cast iron boilers:

A) Can be increased by adding sections
B) Can be changed by increasing gas pressure
C) Can be changed by adding more burners
D)Can be changed by installing larger pumps
E) Cannot be changed

Answer 5

A) Can be increased by “adding sections”

Question 6

Front and rear sections of cast iron sectional boilers differ from intermediate sections by having:
A) No water surface
B) No gas passages
C) Push nipples on one side only
D) No clean outs
E) Bottom supports

Answer 6

C) Push nipples on one side only

Question 7

High temperature “ceramic based rope or gasketing” is used during assembly of cast iron sectional boilers to:

A) Seal the water connections
B) Seal around the burners
C) Seal the exhaust flue
D) Seal the intake air vents
E) Seal the spaces between sections

Answer 7

E) Seal the spaces between sections

Question 8

Cast iron boilers:

A) Must be located in a building basement
B) Are not used today
C) Are suitable for high pressures
D) Are relatively susceptible to corrosion
E) Are constructed in sections

Answer 8

E) Are constructed in sections

Note: Cast Iron Boilers

Question 9

For Cast Iron Modular boilers the operation of each individual burner is controlled by:

A) The water pressure controller
B) The outdoor temperature controller
C) A single controller that controls all burners
D) Step controller which starts all burners simultaneously
E) A step controller which starts modules in sequence

Answer 9

E) A step controller which starts modules in sequence

Question 10

An advantage to using “multiple small cast iron sectional boilers” in a heating plant is:

A) The thermal efficiency of the plant is considerably improved
B) They don’t require maintenance
C) It is capable of operating at very high pressure
D) They require higher pressure air
E) The flue gas is corrosive

Answer 10

A) The thermal efficiency of the plant is considerably improved

Question 11

Pan Global Books

Cast-Iron sectional boilers have flue gas passages which:

a. )are often termed “breeching”
b. )increase heat transfer
c. )receive radiant heat only
d. )acts as boiler water legs

Answer 11

b.)increase heat transfer

Question 12

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 12

a.)tie rod

Note: slightly piece of pipe