Book 1: Unit 1 - Review

Question 1

The advantages of bent tube boilers include:
1. Bent tubes allowed for better heat transfer
2. Much refractory was eliminated
3. Limitations on design and configuration
4. The tubes could form flue gas baffles

Select one:
A. 3,4
B. 1,2
C. 1,2,4
D. 1,2,3,4
E. 2,3,4

Answer 1

C. 1,2,4

Question 2

Early HRT boilers were fired using:

Select one:
A. Wood stokers
B. Natural gas
C. Fuel oil
D. Pulverized coal
E. Coal on grates

Answer 2

E. Coal on grates

Question 3

The locomotive boiler has a furnace that is:
Select one:
A. Called a fire tube
B. Partially surrounded by brickwork
C. Almost completely surrounded by water
D. Not part of the pressure shell
E. External

Answer 3

C. Almost completely surrounded by water

Question 4

In a vertical fire tube boiler, the steam space is located:

Select one:
A. In a compartment on the side
B. At the lower part of the shell
C. In a separate chamber
D. At the top of the shell
E. In the fire tubes

Answer 4

D. At the top of the shell

Question 5

The stampings on a packaged fire tube boiler may indicate a Maximum Allowable Working Pressure (MAWP) of 1000 kPa (145 psi), but the applicable code or Certificate of Inspection may show a MAWP of:

Select one:
A. 100 kPa (14.5 psi)
B. 160 kPa (23.2 psi)
C. 103 kPa (14.7 psi)
D. 1100 kPa (159.5 psi)
E. 1000 kPa (145 psi)

Answer 5

C. 103 kPa (14.7 psi)

Question 6

A major advantage of the Locomotive boiler was the:
Select one:

A. Size of the smoke box
B. Internal furnace
C. Use of longitudinal stays
D. Use of a draft inducer
E. Absence of brickwork, refractory or setting

Answer 6

E. Absence of brickwork, refractory or setting

Question 7

The longitudinal drum boiler is a _____ combustion gas pass boiler.

Select one:

A. Four
B. Five
C. One
D. Two
E. Three

Answer 7

E. Three

Question 8

As per applicable code the maximum pressure for a low-pressure steam heating boiler is:
Select one:

A. 250 kPa (36.2 psi)
B. 103 kPa (14.7 psi)
C. 160 kPa (23.2 psi)
D. 100 kPa (14.5 psi)
E. 1100 kPa (160 psi)

Answer 8

B. 103 kPa (14.7 psi)

Question 9

The cylindrical portion of the Locomotive boiler that connected the furnace to the smoke box was termed the:

Select one:
A. Crown sheet
B. Furnace
C. Fire door
D. Fire tube
E. Barrel

Answer 9

E. Barrel

Question 10

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

Select one:
A. Tapered bushing
B. Push nipple
C. Tie Rod
D. Tie bolt
E. Pipe nipple

Answer 10

B. Push nipple

Question 11

Steel plate heating boilers have thin steel installed in the:

Select one:
A. Firetubes to give the water a swirling motion
B. Firetubes to give the gases a swirling motion
C. Water tubes to give the gases a swirling motion
D. Water tubes to give the water a swirling motion
E. Firetubes to give the air a swirling motion

Answer 11

B. Firetubes to give the gases a swirling motion

Question 12

The “O” type boiler is constructed with _______ drums.

Select one:
A. Five
B. Four
C. Three
D. One
E. Two

Answer 12

E. Two

Question 13

In the firetube boiler ______ pass through the tubes.

Select one:
A. Hot air
B. Fuel gas
C. Feedwater
D. Fuel oil
E. Hot gasses

Answer 13

E. Hot gasses

Question 14

Which of the following are advantages of packaged watertube boilers?
1. Ease of installation
2. One supplier supplies all components
3. Built with all of the necessary fittings
4. Warranties and similar items are easy to deal with

Select one:
A. 2,3,4
B. 1,2,3,4
C. 1,2,4
D. 1,2
E. 3,4

Answer 14

B. 1,2,3,4

Question 15

The crown sheet of a locomotive boiler was held in place by:

Select one:
A. Radial stays
B. Fusible plugs
C. Longitudinal stays
D. Stay bolts
E. Grates

Answer 15

A. Radial stays

Question 16

Vertical firetube boilers have an advantage when ______ is limited.
Select one:
A. Weight
B. Temperature
C. Floor space
D. Height
E. Pressure

Answer 16

C. Floor space

Question 17

In an immersion-type electric boiler scale tends to form on the:

Select one:
A. Firetube bundles
B. Electrodes
C. Walls of the basket
D. Watertube bundles
E. Elements

Answer 17

E. Elements

Question 18

One of the advantages of the serpentine watertube boiler is that the design it:

Select one:
A. Eliminates expansion and contraction stress
B. Is capable of very high steam pressure
C. Produces a smaller foot print
D. Increases the water capacity of the boiler
E. Decreases the height of the boiler

Answer 18

A. Eliminates expansion and contraction stress

Question 19

Cast-Iron boiler sections maximize heat transfer by:

Select one:
A. Exposing as large a surface as possible to the hot gasses
B. Using four push nipples per section
C. Vertical firing
D. Using large Economizer
E. Utilizing an external furnace

Answer 19

A. Exposing as large a surface as possible to the hot gasses

Question 20

Small capacity heating boilers operate most efficiently at:

Select one:

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

Answer 20

D. Continuous full load

Question 21

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

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

Answer 21

A. Tie rods

Question 22

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

Answer 22

A. The boilers are more expensive than customary boilers