4-27.
A well-maintained and properly used
tumbler will dry a load of laundry
in what minimum amount of time?
1.
10 minutes
2.
20 minutes
3.
30 minutes
4.
40 minutes
4-28.
Steam kettles safety valves are set
to release at what pressure?
1.
15 psig
2.
25 psig
3.
35 psig
4.
45 psig
4-29.
Varied operating conditions of the
distilling plants are a primary
cause of which of the following
problems?
1.
Changes in feed level
2.
Scaling of evaporator tubes
3. Improper liquid level in the
first-effect tube nest
4. Excessive steam pressure
4-30.
You are making adjustments on
distilling plant controls to bring
heat and fluid conditions into
balance.
Which of the following
techniques should you use?
1. Adjust all controls
simultaneously
2.
Adjust all heat controls one at
a time and quickly
3.
Adjust controls one at a time
and in small adjustments
4. Adjust each control at
10-minute intervals
4-31.
Which of the following factors is
NOT likely to cause a decrease in
the distilling plant's efficiency?
1.
Air leaks in the first-effect
tube nest
2.
Low vacuum in the last-effect
shell
3. Dirty circulating water
strainer
4. No undue deposits inside the
tubes
4-32.
You should inspect distilling plant
steam orifices a minimum of how
often?
1.
Monthly
2. Twice a year
3. Annually
4. At each overhaul
4-33.
From which of the following sources
should you take water to be used to
desuperheat live steam?
1.
The first-effect tube nest
drain pump
2. The second-effect tube nest
drain pump
3.
The freshwater supply
4.
The steam feed system
4-34.
Fluctuations in the first-effect
steam pressure and temperature will
cause similar fluctuations in which
of the following parts of the
plant?
1.
The second-effect shell only
2.
The steam supply line only
3.
The water levels only
4.
The entire plant
4-35.
When you keep the vacuum in the
first-effect tube nest of a
distilling plant as high as
possible, you will reduce which of
the following factors?
1.
The amount of brine pumped
overboard
2.
The pressure rate of the steam
lines
3.
The rate of evaporator tube
scaling
4.
The rate of distillate
formation
4-36.
When you cannot feed water into the
first-effect tube nest of a
distilling plant, you should look
for which of the following causes?
1.
Scale deposits in the air
ejector
2. Scale deposits in the vapor
feed heater
3.
Obstructions in the feed line
4.
Each of the above
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