Cast-Iron Sectional and modular Boilers Chapter 2

Question 1

1.An advantage of a cast-iron sectional boiler is:
A. Their large capacity
B. Light weight requiring a minimal foundation
C. It’s ability to withstand high pressure
D. The choice of assembly location
E. Small fixed size

Answer 1

D. The choice of assembly location

Question 2

2. To prevent flue gases from escaping the space between the cast-iron sections are:
   A. Seal welded shut
   B. Caulked with a high temperature sealant
   C. Closed with metal strips
   D. Covered by the metal lagging
   E. Sealed with a high temperature rope gasket

Answer 2

E. Sealed with a high temperature rope gasket

Question 3

3. Cast-iron sectional boilers are connected by means of:
A. Tie rods
B. Tapered bushing
C. Screw jacks
D. Pipe nipple
E. Push nipple

Answer 3

E. Push nipple

Note:Cast Iron Sectional Boiler

Question 4

4. Small capacity heating boilers operate most efficiently at:
A. Continuos full load
B. Any load conditions
C. Approximately 75% load
D. Approximately 50% load
E. Approximately 25% load

Answer 4

A. Continuos full load

Question 5

5. A machined and slightly tapered piece of pipe found in a cast-iron sectional heatingboilers is referred to as a:
A. Tie rod
B. Tapered bushing
C. Push nipple 
D. Pipe nipple
E. Tie bolt

Answer 5

C. Push nipple

Question 6

6. A “disadvantage of condensing boilers” is that:

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

Answer 6

D. The boilers are “more expensive” than a customary boilers

Question 7

7. 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
   E. Are smooth to increase combustion gas flow

Answer 7

B. Increase heat transfer

Question 8

8. Cast-iron boiler sections maximize heat transfer by:
   A. Using four push nipples per section
   B. Vertical firing
   C. Exposing as large surface as possible to the hot gases
   D. Utilizing an external furnace
   E. Using a large economizer

Answer 8

C. Exposing as large surface as possible to the hot gases

Question 9

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

Answer 9

B. Consist of a number of horizontal sectional cast-iron boilers

Question 10

10. The boilers or modules in a multiple heating boiler plant are:
    A. Most typically connected in series between the supply and return header
    B. Most typically connected in parallel after the supply 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 10

C. Most typically connected in parallel between the supply and return header

Question 11

11. Cast-iron sectional boilers "are held tightly" together by means of:
A. Push nipples
B. Tapered bushings
C. Pipe nipples
D. Pipe flanges
E. Tie Rods

Answer 11

E. Tie Rods

Cast-Iron sectional boilers

Question 12

12.The boilers in multiple boiler heating plants are operated:
A. In sequence by a step controller
B. Individually by separate controllers
C. By the outdoor temperature
D. By temperature controllers
E. Manually as required

Answer 12

A. In sequence by a step controller

Question 13

13.An advantage of a multiple heating boiler plant is:

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

Answer 13

C. Most low capacity can be moved through standard sized doorways