Chapter 3

Question 1

The number of passes in a firetube boiler rarely exceeds:

a. 1
b. 4
c. 5
d.2

Answer 1

B

Question 2

The outer pipe in a vertical tubeless boiler contains:

a. The water column
b. The furnace
c. The boiler water
d.The steam stop valve

Answer 2

c

Question 3

The term for the top of the furnace in a locomotive style boiler:

a. tube
b. crown sheet
c. drumsheet
d. tubesheet

Answer 3

b

Question 4

The wetback design in a firetube boiler increases:

a. Strength
b. Heating surface
c. Temperature
d. Pressure

Answer 4

b

Question 5

The part of the firetube boiler that contains the water is called:

a. Coil
b. Shell
c. Section
d. Drum

Answer 5

b

Question 6

A firetube boiler may be used to produce:

a. Steam up to 15 psi/103 kPa
b. Steam over 15 psi/103 kPa
c. Hot water over 30 psi/206 kPa
d. All of the above

Answer 6

d

Question 7

An HRT boiler is:

a) A firetube boiler
b) A watertube boiler
c) A modular boiler
d) Internally-fired
e) A fin-tube coil boiler
f) a) and d)

Answer 7

a

Question 8

Metal sections of various designs installed at various locations in a firetube boiler to provide extra strength to flat surfaces:

a. Waterwalls
b. Firetubes
c. Flanges
d. Stays

Answer 8

d

Question 9

The ___________ boiler has a large volume of water in relation to horse power size.

a. Watertube
b. Electric boiler
c. Firetube boiler
d. Packaged boiler

Answer 9

c

Question 10

Vertical firetube steam boilers require:

a. Two safety valves
b. To be warmed up slowly
c. No low water fuel cutoff
d. A brick setting

Answer 10

b

Question 11

In a firetube boiler, the heat and gases of combustion pass:

a. Through the induced draft fan
b. Over the outside of boiler tubes
c. Through the boiler tubes
d. Through the convection bank of tubes

Answer 11

c

Question 12

Where and why would a diagonal stay be used in a firetube boiler?

a. on the top of the crownsheet to support it against the internal pressure of the boiler
b. in the waterlegs when staybolts cannot be made to fit
c.to support the front or rear tubesheet in boilers where internal fittings prevent the use of a through stay
d. a diagonal stay would not be used in a firetube boiler

Answer 12

c

Question 13

The HRT boiler is inefficient to operate due to:

A.The coal fired grates
B.Heat loss through the brick setting was too high
C.The gas passes were to long
D.The labour required to construct the brickwork
E.The gas passes were too few

Answer 13

b

Question 14

The Steel plate heating boiler is classified as a _____ pass boiler.

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

Answer 14

b

Question 15

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

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

Answer 15

a

Question 16

The uptake area of a Locomotive boiler was often equipped with a:

A.Fire door
B.Damper for combustion air control
C.Water leg
D.Damper for combustion control
E.Smoke box for smoke control

Answer 16

d

Question 17

A major advantage of the Locomotive boiler was the:

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

Answer 17

a

Question 18

In order to reduce extensive heat losses from the externally fires furnace walls:

A.The furnace walls were lined with refractory
B.The furnace was enlarged
C.The furnace grate was placed inside the enlarged return flue
D.More firetubes were added
E.The furnace was made longer

Answer 18

c

Question 19

Early HRT boilers were fired using:

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

Answer 19

e

Question 20

Steel plate heating boilers have thin steel installed in the:

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

Answer 20

d

Question 21

In the HRT boiler the hot combustion gases pass:

A.Along the underside of the drum and return through the firetubes to the boiler stack
B.Through the firetubes and return along the underside of the drum to the boiler grate
C.Through the firetubes and return along the underside of the drum to the boiler stack
D.Along the underside of the drum and return through the firetubes to the economizer
E.Along the underside of the drum and return through the firetubes to the boiler grate

Answer 21

a

Question 22

The vertical firetube boiler should be warmed up slowly in order to prevent overheating of the:

A.Crown sheet and water legs
B.Crown sheet and barrel
C.Tubes and lower tube sheet
D.Steam drum and mud drum
E.Tubes and upper tube sheet

Answer 22

e

Question 23

the maximum pressure for a low-pressure steam boiler is:

a) 103 kPa
b)160 kPa
c) 250 kPa
d) 110 kPa

Answer 23

a

Question 24

the main part of a high pressure firetube boiler is called the:

a) windbox
b) furnace
b) shell
c) drum

Answer 24

c

Question 25

the pressure and temperature limiting factors for steam units used for heating and hot water heating boilers are: a) 121 kPa or 103 kPa for steam units, and 110 kPa for hot water units b) 110kPa for steam units and 121 kPa for hot water units c) 103 kPa for steam units and 121 kPa for hot water untis d) 110 kPa for steam units and 110 kPa for hot water untis

Answer 25

c

Question 26

in a vertical firetube boiler, the steam space is loacated: a) in a seperate chamber b) in a compartment on the side c)at the lower part of the shell d) at the top of the shell

Answer 26

d

Question 27

the forerunner of the modern packaged firetube boiler was the: a) internally fired horizontal return tubular boiler (hrt) b)internally fired scotch marine boiler c) externally fired scotch marine boiler d) externally fired horizontal return tubular boiler (hrt)

Answer 27

b

Question 28

the chief advantage of a packaged heating boiler is: a)its compactness b) mass production ability c) higher pressure rating d) its higher factor of safety

Answer 28

b

Question 29

in a vertical firetube boiler: a) the water passes through the inside of the tuubes b) the steam accumilates in the lower part of the boiler shell c) the horizontal shell has vertical firetubes at each end d) the upper part of the tubes are cooled by steam

Answer 29

d

Question 30

The "pipe" is a common term for: a) the combustion chamber of a vertical tubeless boiler b) the drain on an immersion boiler c) the water jacket of a vertical boiler d) the steam outlet of an electrode boiler

Answer 30

a

Question 31

in which of thes boilers does the firing occur in a downward direction? a) immersion electrode b) vertical electric c) vertical firetube d) vertical tubeless

Answer 31

d

Question 32

one feature of a vertical tubeless boiler that would not be found on the vertical firetube boiler is: a) water level control b) burners c) refractory d) water column

Answer 32

c