Chapter 2

Question 1

Cast iron sectional boilers have flue gas passages which:
A. Often termed breeching
B. Increase heat transfer
C. Receive radiant heat only
D. Act as boiler water legs

Answer 1

B

Question 2

A machined and slightly tapered piece of pipe found in a sectional heating boiler is the
A.tie rid
B. Tapered bushing
C. push nipple
D. Clean out nipple

Answer 2

C

Question 3

An advantage of a cast iron boiler is
A.large capacity
B. Light weight resulting in lesser foundation requirements
C. Ability to withstand high pressure
D. The Choice of assembly location

Answer 3

D

Question 4

Small capacity heating boilers operate most efficiently at
A. Continuous full load
B. Any type of load
C. 75% load
D. 66% load

Answer 4

A

Question 5

A modular cast iron heating boiler

A. Has a number of burners which 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

B

Question 6

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

C

Question 7

Horizontal cast iron sectional boilers require ____ nipples to connect two sections.

A. 2
B. None
C. 3
D. 4

Answer 7

D

Question 8

A cast iron sectional boiler can have gas passages
A. True
B. False

Answer 8

True

Question 9

The gas passages in wet bottom cast iron sectional boilers

A. Is longer than the flow in boilers with sections suspended above the burners. B. bypasses the barometric dampers.
C. travels through four passes.
D. is shorter than the flow in boilers with sections suspended above the burners.

Answer 9

A

Question 10

A modular cast iron sectional boiler plant

A. Needs particular attention to water treatment.
B. Is most typically connected and serious between the supply and the return headers.
C. Has heat exchangers that extract the latent heat of evaporation from the boiler water.
D. Is most typically connected in parallel between the supply and return headers.

Answer 10

A

Question 11

To prevent flue gases from escaping a cast iron sectional boiler, the spaces between the sections are…
A. Sealed by push nipples.
B. Sealed with high-temperature rope or castkrting
C. Sealed by boiler pressure.
D. Sealed by differential pressure.

Answer 11

B

Question 12

A condensing boiler condenses moisture from
A. Flue gases
B. Steam
C. Hot water
D. Feed water

Answer 12

A

Question 13

A wet bottom cast iron sectional boiler has
A. A combustion chamber completely surrounded by water.
B. Stay bolts to support the bottom from collapsing under boiler pressure.
C. The bottoms of its section suspended over the combustion chamber.
D. Two tube sheets.

Answer 13

A

Question 14

Fins cast onto the surface of a cast iron sections cause
A. Flue gases to increase in velocity, shortening the time required to pass through the boiler.
B. Flu gases to swirl as they pass over the sections, increasing heat transfer. C. Flu gases to increase in volume, increasing heat transfer.
D. Chimney draft to increase.

Answer 14

B

Question 15

Push nipples are
A. The reset on lockout interlock.
B. Ferrule connectors on the fire side.
C. The connections between the sections of a cast iron sectional boiler. D. The connectors that secure the tubes to the drum on a flexible tube boiler.

Answer 15

C

Question 16

Cast iron sectional boilers are approved for hot water heating systems only
True
False

Answer 16

False

Question 17

A wet bottom cast iron sectional boiler has:

a. the bottoms of its sections suspended over the combustion chamber
b. its combustion chamber completely surrounded by water
c. stay bolts to support the bottom from collapsing under boiler pressure
d. two tube sheets

Answer 17

b

Question 18

A cast iron sectional boiler can have gas passages

True
False

Answer 18

true

Question 19

Cast-iron sectional boilers have flue gas passages which:

a. Act as boiler water legs
b. Increase heat transfer
c. Receive radiant heat only
d. Are often termed breeching

Answer 19

b

Question 20

Water legs are

a. Found in a watertube boiler
b. Intended to scrub heat from the boiler water
c. Found in a wetback boiler
d. Intended to provide more heating surface exposed to the direct radiant heat of the fire

Answer 20

d

Question 21

A disadvantage of condensing boilers is that:

A. The heat exchangers in them are quite small
B. Less heat is extracted from the hot flue gases
C. The boilers are more expensive than customary boilers
D.Any moisture in the flue gases will not condense out
E.The boilers are less expensive than customary boilers

Answer 21

c

Question 22

Small capacity heating boilers operate most efficiently at:

A.Approximately 75% load
B.Approximately 50% load
C.Continuous full load
D.Any load condition
E.Approximately 25% load

Answer 22

c

Question 23

An advantage of a cast-iron sectional boiler is:

A.Small fixed size
B.Their large capacity
C.The choice of assembly location
D.Its ability to withstand high pressure
E.Light weight requiring a minimal foundation

Answer 23

c

Question 24

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

A.Tie rod
B.Pipe nipple
C.Tie bolt
D.Push nipple
E.Tapered bushing

Answer 24

d

Question 25

An advantage of a multiple heating boiler plant is:

A.That with a small water content a pressure part failure will cause more damage
B.The boilers are heavy requiring special foundations
C.They are light requiring a minimal foundation
D.That they have a large water capacity
E.Most low capacity can be moved through standard sized doorways

Answer 25

e

Question 26

Cast-iron boiler sections maximize heat transfer by:

A.Exposing as large a surface as possible to the hot gases
B.Using a large economizer
C.Using four push nipples per section
D.Utilizing an external furnace
E.Vertical firing

Answer 26

a

Question 27

Cast-iron sectional boilers are held tightly together by means of:

A.Pipe nipples
B.Pipe flanges
C.Tie rods
D.Tapered bushings
E.Push nipples

Answer 27

c

Question 28

The boilers or modules in a multiple heating boiler plant are:

A.Most typically connected in parallel after the supply header
B. Most typically connected in series between the supply and return header
C. Most typically connected in parallel between the supply and return header
D. Most typically connected in parallel before the return header
E. Fired by a common burner control system

Answer 28

c

Question 29

The boilers in multiple boiler heating plants are operated:

A.Manually as required
B. By the outdoor temperature
C. Individually by separate controllers
D. In sequence by a step controller
E. By temperature controllers

Answer 29

d

Question 30

A modular cast-iron heating boiler:

A. Has a number of burners that operate together
B. Is constructed with a number of individual sections
C. Does not have continuous water flow through each section
D. Cannot be enclosed in a single casing
E. Consists of a number of horizontal sectional cast-iron boilers

Answer 30

e