During operation of the plant, a
The relief valve in the feedwater inlet
pressure reduction occurs in each stage
is set to open at what pressure?
to enable the plant to
function with a steady, even flow of
feedwater throughout the plant
produce as much vapor in the fifth
stage as in the first
control the feedwater temperature
Questions 10-30 through 10-34 concern
within the specified limits
the maintenance of a flash-type unit,
produce an increased amount of vapor
and should be judged True or False.
in each successive stage
Air leakage in the brine and distillate
Distillate leaving the cooler is pumped
pumps will have NO effect on vacuum.
to storage tanks only if the salinity
reading is NO greater than
The saltwater heater requires more
frequent cleaning than the distillate
The orifices in the feed boxes are more
likely to be plugged by foreign matter
than by scale.
The four thermometers mounted on the
saltwater heater measure which of the
A relief valve that is continually
popping should be scheduled for routine
maintenance as time permits.
Feedwater inlet and outlet
Steam surrounding the tubes
Pneumatic-type reducing valves should be
used only for low-pressure applications.
All of the above
Cooling water from the air ejector
precooler flows into which of the five
heat exchangers mounted on the
How many inches of mercury are
in stage 5 of the evaporator?
What is the
purpose of the duplex
To clean steam going to the
preheater air ejector
To remove solid matter from seawater
To remove impurities from freshwater
To remove noncondensables from the
maintenance and adjustments
required on relief and reducing
valves, and recognize some of the
troubles that may be encountered
Which of the following procedures must
always be followed after a relief valve
Reset the spring tension
Reduce the pressure
Grind the disk
Grind the seat
A pneumatic pressure-controlled reducing
valve may be used on which of the
following supply lines?
Each of the above