weight of the boiler water at normal
steaming level is 1790.95 pounds. What
is its volume in gallons?
In answering questions 9-20 through 9-24
use tables 7-2 through 7-7 and the
following information on an auxiliary boiler.
Dry weight 11,460 pounds, wet weight 14,250
pounds, operating pressure 125 psi.
9-20. What is
the volume in gallons of this boiler?
175 gal 2.
215 gal 3.
300 gal 4.
350 gal 9-21.
How many ounces of (a) TSP and (b) DSP
are required for the initial chemical
treatment for this boiler?
9-22. How many
ounces of (a) TSP and (b) DSP
would be required for the initial dosage
if the boiler operated at 35 psi?
9-23. If the
auxiliary boiler water alkalinity is
found to be 0.8 epm, how many ounces of
TSP must be used to raise the
alkalinity to 2.0 epm?
after adding TSP you have a phosphate
correction equaling 170 ppm, how many
ounces of DSP will be required to raise
the phosphate to 300 ppm?
Questions 9-25 through 9-27 are to be
judged True or False.
Treatment in accordance with the DSP
dosage table will bring the alkalinity
level to the upper limit of 400 ppm.
9-26. From the standpoint of
it is better to secure and
dump the boiler when the alkalinity level
is 6 epm or when the phosphate level is
9-27. If the boiler water chloride
level exceeds 30 epm, it is better
to control it through surface blowdowns
rather than by dumping, flushing,
and refilling the boiler.
Learning Objective: Indicate factors
that contribute to the correct and
efficient operation of hydraulic
systems and related components; also
recognize some sources of trouble
that may be encountered.
overall efficiency of a hydraulic
installation that drives auxiliary
machines is determined by which of the
Speed and stroke
All of the above
9-29. Major repairs to hydraulic
units should be accomplished by which
of the following facilities?
1. A naval
A SIMA group
3. A tender
Each of the above
Questions 9-30 and 9-31 are to be judged
True or False.
9-30. A main step in
troubleshooting an electrohydraulic
system is to determine whether the
faulty condition is in the
hydraulic, mechanical, or electric
part of the system.
should never disassemble a hydraulic
unit, unless you are certain the trouble
is in it. 57