Chapter 3 Flashcards
The number of passes in a firetube boiler rarely exceeds:
a. 1
b. 4
c. 5
d.2
B
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
c
The term for the top of the furnace in a locomotive style boiler:
a. tube
b. crown sheet
c. drumsheet
d. tubesheet
b
The wetback design in a firetube boiler increases:
a. Strength
b. Heating surface
c. Temperature
d. Pressure
b
The part of the firetube boiler that contains the water is called:
a. Coil
b. Shell
c. Section
d. Drum
b
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
d
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)
a
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
d
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
c
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
b
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
c
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
c
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
b
The Steel plate heating boiler is classified as a _____ pass boiler.
A.Four
B.One
C.Two
D.Three
E.Multi
b
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)
a