# D2 - LT #2 - Layout Equipment Flashcards

1
Q

Define supplementary angle

A

An angle that adds up to 180 degrees

2
Q

Define complementary angle

A

An angle that adds up to 90 degrees

3
Q

What is the sum of the angles in any triangles

A

Always 180 degrees

4
Q

Which trigonometry function is used to calculate an angle when the opposite and adjacent sides of a triangle are known?

A

Tangent

5
Q

What does the term zenith mean?

A

The point directly overhead of the instrument

6
Q

When using a transit, what is the sum of the clockwise and counter-clockwise angles?

A

360 degrees

7
Q

How do you rough-level a transit or theodolite equipped with an optical plummet?

A

Adjust the legs of the tripod

8
Q

What is the difference between a transit and a theodolite?

A

Transit-uses vernier scale while a theodolite - all the readings are internal

9
Q

What is adjusted to read the minutes and seconds when using a theodolite?

A

the micro-dial

10
Q

In which direction can electronic theodolites lay out horizontal angles?

A

both clock and counter clockwise

11
Q

How is a telescope transited?

A

Transiting a telescope is the process of flipping the telescope 180 degrees to look in the opposite direction

12
Q

Why is transiting a telescope better than rotating through 180 degrees

A

Transiting is preferable because the zero of the horizontal scale doesn’t change

13
Q

How is a baseline created?

A

1) Establish 2 known points
2) Known points are usually parallel to a gridline or property line. Set the instrument over p2 and zero it on P1. Transit the telescope to establish a 3rd.

14
Q

Describe what SOH means

A

SOH
SIN = OPP / HYP
OPP = SINE X HYP
HYP = OPP / SINE

15
Q

Describe what CAH means

A

CAH

16
Q

Describe what TOA means

A

TOA