SM0486
6.
Oxygen gages must
a.
be oiled prior to use.
b.
not be used with nitrogen.
c.
never be used with oil.
d.
be calibrated frequently to minimize danger from a ruptured element.
7.
A pressure gage should be calibrated
a.
using secondary reference standards.
b.
using secondary transfer standards.
c.
in the same position as it is normally used.
d.
with compressed nitrogen to prevent contamination.
8.
Range error
a.
increases at higher scale indications.
b.
is the same throughout the range of the dial.
c.
is not a repeatable error.
d.
cannot be corrected by a mechanical adjustment and a correction chart
must be prepared.
9.
Zero shift is compensated for by
a.
rotating the movement in direction A or B.
b.
lengthening the link.
c.
shortening the link.
d.
repositioning the pointer.
10.
Rapping the table before each reading
a.
levels the meniscus in the tube.
b.
helps adjust the meniscus shape.
c.
increases the error by as much as 15 mm.
d.
knocks loose contaminating deposits from the tube.
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