7-65.
You have set up an impeller type of
mixer to mix a developer solution,
but you have adjusted the clamp
improperly so the shaft is vertical
and in the center of the container.
What is the most probable end
result?
1. The motor bearings are damaged
2.
Too much air was whipped into
the solution
3. The mixer vibrated enough to
mix the chemicals sufficiently
4. The solution was churned from
top to bottom, rather than from
bottom to top
7-66.
How many degrees Celsius equate
to 68°F?
1.
10°C
2.
20°C
3.
30°C
4.
40°C
7-67.
You are mixing a developing
solution and the directions call
for water at 23.8°C. This is equal
to how many degrees Fahrenheit?
1.
18.75°F
2.
37.50°F
3.
75.00°F
4.
125.50°F
7-68.
You are preparing a working
solution of developer from a stock
solution.
The instructions call
for 1 part of stock solution and
3 parts water.
You need a total
of 1 gallon of working solution.
What amount of water, in ounces,
should you add to the solution?
1.
32
2.
64
3.
96
4.
128
7-69.
For adequate ventilation in a
chemical mixing area, there should
be one complete air change every
1.
15 minutes
2.
30 minutes
3.
3 minutes
4.
45 minutes
7-70.
It is permissible to mix photo-
graphic chemicals in a photographic
print room that has adequate
ventilation.
1.
True
2.
False
7-71.
You need 32 ounces of developer
solution.
The only size package
of dry, prepackaged chemicals you
have on hand makes 128 ounces.
Should you mix the entire package
to make 128 ounces and, if so, why?
1.
Yes; when only part of the
package is mixed, some of the
ingredients may be left out
of the resulting solution
2.
Yes; when only part of the
package is mixed, the resulting
solution will not develop film
3.
No; dry, packaged chemicals are
homogenized
4.
No; dry, packaged chemicals are
formulated to be mixed either
in part or in whole
7-72.
You should follow what procedure
when mixing chemicals?
1.
Add water to dry chemicals
and acid to water
2.
Add dry chemicals to water
and acid to water
3.
Add water to dry chemicals
and water to acid
4.
Add dry chemicals to water
and water to acid
Learning Objective:
Recognize
safety precautions required in
chemical mixing areas.
7-73.
Labels on chemical storage tanks
must include the name of the
solution, hazardous chemicals
contained, the name of the person
who mixed it, and what other
information?
1.
The water-mixing temperature
2.
The date mixed
3.
The antidote
4.
The name of the chemical-mixing
supervisor
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