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1. How much does an Invar tape expand and contract (c)
due to change in temperature, compared to a stan-
dards steel tape under the same conditions? An Invar tape will expand
and contract much less
(a) An Invar tape expands and contracts much more than a steel tape when ex-
than a steel tape posed to the same change
in temperature. Unfortu-
(b) An Invar tape expands and contracts slightly less nately, Invar tapes, while
than a steel tape extremely accurate, are
too fragile for normal use.
(c) An Invar tap expands and contracts much less than
So they are typically used
a steel tape
for measuring baselines
or calibrating steel tapes
(d) The two tapes expand and contract about the same
amount
2. How many pins are in a set of chaining pins? (b) 11
(a) 10
(b) 11
(c) 12
(d) 20
3. What features distinguish an add tape? (b)
(a) The last foot of each end is graduated in tenths or An add tape has an ex-
hundredths or a foot tra graduated foot beyond
the zero mark
(b) There is an extra graduated foot beyond the zero
mark On a subtract tape, the
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(c) There is an extra graduated foot at the 100 foot end last foot is graduated into
of the tape tenths or hundredths
(d) There is an extra graduated food at both ends of
the tape
4. How long is a Gunter's Chain? (c) 66 ft
(a) 30 ft
(b) 53 ft
(c) 66 ft
(d) 130 ft
5. The area of a square one Gunter's chain on a side is (b) 4400 ft^2
most nearly
( 66 ft )^s = 4356 ft^2
(a) 250 ft^2
(b) 4400 ft^2
(c) 10,000 ft^2
(d) 44,000 ft^2
6. Most, nearly, what is the area of a rectangle 6 Gunter's (a) 3 ac
chains long by 5 Gunter's chains wide?
(6 x 66 ft) * (5 x 66 ft)
(a) 3 ac ------------------------ = 3
ac
(b) 7 ac 43,560 ft^s / ac
(c) 20 ac
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(d) 30 ac
7. The term "height of instrument," as used in leveling, (b) the elevation of the line
means of sight above the datum
being used
(a) the distance from the ground to the axis of the
telescope
(b) the elevation of the line of sight above the datum
being used
(c) the height of the line of sight above a bench mark
(d) all of the above
8. Balancing distances to backsights and foresights elim- (c) by balancing distances
inates to backsights and fore-
i. collimation error sights, both curvature of
ii. curvature of the earth errors the earth error and colli-
iii. rod plumb errors mation error are eliminat-
ed
(a) i only
Refraction error is elim-
(b) ii only inated by line of sight
not being close to the
(c) i and iii only
ground
Rod plumb error is elimi-
(d) i and ii only
nated by user being care-
ful
Parallax error is eliminat-
ed by adjusting eye piece
9.
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The curvature of the earth error associated with lebel- (a) 0.024 ft
ing shot of 1000 ft is most nearly
C = 0.024 * F^2
(a) 0.024 ft = (0.024) (1 ft^2)
(b) 0.032 ft Note: curvature is typically
calculated based on mea-
(c) 0.035 ft surements in thousands of
feet
(d) 0.055 ft
10. What is an advantage of an Invar leveling rod? (a) low coefficient of ex-
pansion
(a) low coefficient of expansion
This reduces error by tem-
(b) more visible graduations perature differences.
(c) top portion of rod can be detatched
(d) visibility at longer distances
11. For a typical modern level, the device that defines the (b) compensator
line of sight is the
(a) bull's-eye bubble
(b) compensator
(c) plumb bob
(d) spirit level bubble
12. To minimize leveling error due to refraction, surveyors (d) All of the above
should
i. balance backsight and foresight