Cast Iron Boilers

Question 1

Two methods of assembling a cast iron sectional boiler are:
Cap screws and nuts
Flange bolts and gaskets 
Short and long toe rods
Cable ties and winch
Clamps and Center locks

Answer 1

Short and long tie rods

Question 2

The fins cast on the flat surface of the sections of cast iron sectional boiler are used:
Steam output 
Water circulation 
Water capacity 
Heat transfer effectiveness 
Steam capacity

Answer 2

Heat transfer effectiveness

Question 3

The sections of cast iron boiler are mainly designed to obtain maximum:
Water circulation 
Steam output
Water space
Heat transfer
Steam space

Answer 3

Heat transfer

Question 4

Cast iron section waterside are connected and sealed by:
Pipe plugs 
Flanges
Polished surface
Tapered push nipples
Threaded connotations

Answer 4

Tapered push nipples

Question 5

The capacity of cast iron boilers:
Can be increased by adding sections
Can be changes by increasing gas pressure
Can be changed by installing larger pumps
Cannot be changed

Answer 5

Can be increased by adding sections

Question 6

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

Answer 6

Push nipples on one side only.

Question 7

High temperature ceramic based rope or gasket omg is used during assembly of cast iron sectional boilers to:
Seal around the burners
Seal the spaces between sections
Seal the intake air vents
Seal exhaust flue
Seal the water connections

Answer 7

Seal the spaces between sections

Question 8

Cast iron boilers:
Must be located in a building basement 
Are suitable for high pressures 
Are constructed in sections
Are relatively susceptible to corrosion 
Are not used today

Answer 8

Are constructed in sections

Question 9

For cast iron modular boilers the operation of each individual burner is controlled by:
The outdoor temperature controller
A single controller that controls all burners
The water pressure controller
A step controller which starts modules in sequence

Answer 9

A step controller that starts modules in sequence

Question 10

An advantage to using multiple small cast iron sectional boiler in a heating plant is:
The thermal efficiency of the plant is considerably improved
They require higher pressure air
It is capable of operating at very high pressure
They don’t require maintenance

Answer 10

The thermal efficiency of the plant is considerably improved