5-21.
HOW do you determine if an Abney or
Locke level is out of adjustment?
1.
Check the reflected bubble with
the instrument in a horizontal
plane
2.
Check the reflected bubble with
the instrument in a vertical
plane
3.
Check the plate level bubbles
5–22.
What is a general rule regarding
the freguency of adjustment?
1.
Check and adjust often
2.
Check rarely and adjust rarely
3.
Check often and adjust rarely
4.
Check rarely and never adjust
5–23.
You feel your instrument is out of
adjustment. Which of the following
procedures should you do before
making any adjustments?
1.
Ensure the instrument is
screwed down on the tripod
2.
Set the instrument up in the
shade
3.
Repeat the checks at least
three times
4.
All of the above
5–24.
What type of surface should you use
to set up an instrument for
adjustment?
1.
Asphalt
2.
Chipped hardened surface
3.
Sand
4.
Plywood
5-25.
What purpose, if any, does
retightening the wing nuts on the
tripod legs accomplish?
1.
To prevent a possible shifting
of the legs
2.
To ensure the nuts did not
loosen themselves
3.
To keep the tripod head from
moving
4.
None
5-26.
Most tests show an error equal to
what amount of the actual
displacement error?
1.
Half the actual error
2.
Double the actual error
3.
Equal to the actual error
4.
Three times the actual error
5-27.
What is creep in relation to the
instrument?
1.
Position shift due to heat
2.
Settlement of the instrument
3.
Position shift due to cold
4.
All of the above
5-28.
The operator’s manual is your first
source of information when
instruments need adjustment.
1.
True
2.
False
5-29.
YOU are performing a survey
requiring a high degree of
accuracy. Which, if any, of the
following procedures should be one
of the first steps you perform?
1.
Check your instrument for
maladjustment
2.
Figure the compensation for
adjustments to the instrument
3.
Oil the tripod head
4.
None of the above
Learning Objective: Recognize the
correct test and procedures to be
used in relation to an engineer’s
level.
5-30.
You are assigned to a survey party.
You get the level along with your
other equipmnet. What procedure,
if any, should you perform on the
instrument before starting work?
1.
Check the instrument for proper
adjustment
2.
Adjust all the bubble tubes to
the maximum angle
3.
Perform a two–peg test
4.
None
30
