8-36. What part of a transit is graduated
from 0° to 90° in four quadrants?
1. Horizontal circle
2. Vertical circle
3. A-vernier
4. Double vernier
Figure 8A
IN ANSWERING QUESTIONS 8-37 AND 8-38,
REFER TO FIGURE 8A.
8-37. The least reading of the horizontal
scale shown is
1. 20 seconds
2. 30 seconds
3. 45 seconds
4. 1 minute
8-38. Reading clockwise, the vernier reads
1. 11°36’00”
2. 28°30’00”
3. 348°20’00”
4. 351°45’00”
Figure 8B
IN ANSWERING QUESTIONS 8-39 AND 8-40,
REFER TO FIGURE 8B.
8-39. The least reading of the horizontal
scale shown is
1. 20 seconds
2. 30 seconds
3. 45 seconds
4. 1 minute
8-40.
In a counterclockwise direction, the
vernier reads
1. 341°45’
2. 338°15’
3. 39°10’
4. 21°47’
8-41. For a 1-minute theodolite, which of
the following actions occur when the
circle clamp is in the lever-down
position?
1. The circle is clamped and turns
with the telescope
2. The circle is clamped and the
telescope turns independently
3. The circle is unclamped and the
telescope turns independently
4. The circle is unclamped and turns
with the telescope
8-42. The lower half of the vertical line
on the reticle of a theodolite is
split for what purpose?
1. To center triangular-shaped
distant objects
2. To determine the width of distant
objects
3. To center small distant objects
4. To determine the height of
distant objects
8-43. What part of an engineer’s transit
serves the same function as the
tribrach of the theodolite?
1. Leveling assembly
2. Lower plate
3. Upper plate
4. Standard
8-44. What are the values read from the
vertical circle of a theodolite
called?
1. Vertical angles
2. Direct angles
3. Zenith distances
4. Direct distances
8-45. What part of a one-second theodolite
is used to select whether the angle
being read is a vertical or
horizontal angle?
1. Circle tangent screw
2. Inverter knob (circle-selector)
3. Circle setting knob
4. Circular level
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