SM0486
11.
The partially evacuated chamber shown in Figure 17
a.
is rigid.
b.
changes shape with changes in atmospheric pressure.
c.
increases in length when subjected to a vacuum.
d.
decreases in length when subjected to a vacuum.
12.
The two reference pressures commonly used in scientific and engineering work
are
a.
absolute and atmospheric.
b.
absolute and 10 psi.
c.
barometric and atmospheric.
d.
barometric and absolute.
13.
You are calibrating an absolute pressure gage at 20 psia.
Your standard,
referenced to atmospheric pressure, should indicate approximately
a.
20 psi.
c.
5 psi.
b.
20 inches vacuum.
d.
5 psia.
14.
Specific gravity is the ratio of the density of
a.
the substance to the density of water.
b.
the substance to the density of alcohol.
c.
water to the density of the substance.
d.
the substance to the density of mercury.
15.
When calibrating an altimeter, altitude is simulated by
a.
vacuum and pressure.
b.
vacuum.
c.
the specific gravity of mercury.
d.
760 millimeters of mercury.
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