7-54.
The specific gravity measurement
of a solution is below the lower
limit.
This may be an indication
of which of the following errors?
1.
The solution is diluted
with too much water
2.
Not enough water was added
3.
Too much of an ingredient
has been added
4.
The solution may be highly
acidic
7-55.
A hydrometer used to measure the
silver content of a fixing bath
is calibrated in grams of silver
per
1.
ounce
2.
milliliter
3.
gallon
4.
liter
7-56.
Specific gravity is a measurement
of what property of a liquid?
1.
Composition
2.
Strength
3.
Opacity
4.
Density
7-57.
What part of the meniscus, if any,
at the stem of the hydrometer
indicates the ratio of the density
of a solution to the density of
distilled water?
1. The top
2. The center
3. The bottom
4. None
7-58.
Acidity and alkalinity of solutions
are measured with what instrument?
1. Hydrometer
2. pH meter
3. Activity indicator
4. Sensitometer
7-59.
Photographic developing solutions
have which of the following pH
values?
1.
3.1 to 5.0
2.
5.0 to 8.0
3.
8.0 to 12.0
4.
12.0 to 14.0
7-60.
An alkali may have which of
the following pH values?
7-61.
A pH value of 7.0 is
7-62.
1.
acidic
2.
alkaline
3.
neutral
A pH value of 1.0 is how many
times stronger than a pH value
of 3.0?
7-63.
1.
One
2.
Two
3.
Ten
4.
One hundred
The solution used to standardize
a pH meter is known as what type
of solution?
7-64.
1.
Acid
2.
Alkali
3.
Buffer
4.
Neutral
You are standardizing a pH meter
before taking the pH reading of a
black-and-white fixer.
You should
use a buffer solution with what pH
value to standardize the meter?
1. 1.0
2. 5.0
3. 7.0
4. 9.0
1.
14.0
2.
10.0
3.
7.0
4.
4.0
Learning Objective:
Identify
procedures used in mixing
photographic chemicals.
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