Civil Drafting Technology by Madsen & Shumaker



Civil Drafting Technology - 7th Edition

Chapter 7 – Location and Direction

Chapter Test

Part I

Delete the responses that do not best finish each statement.

7–1 The line that represents 0° longitude is also called:

a. The International Date Line

b. The prime meridian

c. The equator

d. Greenwich, England

7–2 Lines of latitude:

a. Are measured as an angular distance from the point at the center of the earth

b. Connect the north and south poles

c. Are called parallels

d. Are approximately the same distance apart

7–3 45°26’14” + 15°10’52” =

a. 60°36’6”

b. 60°37’66”

c. 60°37’6”

d. 61°13’6”

7–4 A direction measured clockwise from a given zero is called:

a. A bearing

b. An azimuth

c. A magnetic declination

d. A local attraction

7–5 A direction measured clockwise or counterclockwise with respect to quadrants of a compass is called:

a. A grid azimuth

b. An azimuth

c. A bearing

d. A magnetic declination

7–6 Refer to Figure 7–18. What is the distance from Elk Cove to the equator?

a. 5,020,000 meters

b. 5,029,000 miles

c. 5029 kilometers

d. 8,111.3 miles

7–7 The length of a degree of latitude:

a. 64 statute miles

b. 69 nautical miles

c. 69 statute miles

d. 690 statute miles

7–8 The Pythagorean theorem formula:

a. a2 + b2 = c2

b. a2 - b2 = c2

c. a2 + b2 = c

d .a2 - b2 = c

7–9 The length of a degree of longitude at 22° latitude:

a. 69 statute miles

b. 65 statute miles

c. 64 statute miles

d. 62 statute miles

7–10 The longest side of a right triangle, opposite the 90° angle.

a. Acute triangle

b. Leg

c. Side

d. Hypotenuse

Part II

Refer to Figure T7-1 in your textbook to complete each item. Highlighting the underscore and type your answer.

7–1 Give the azimuths of the following lines. North is zero.

Line A ___________________

Line B ___________________

Line C ___________________

Line D ___________________

7–2 Give the bearings of the lines featured in question 7–1 above.

Line A ___________

Line B ___________

Line C ___________

Line D ___________

Part III

Keep the “T” if the statement is true and delete the “F.” Keep the “F” if the statement is false and delete the “T.” Reword all false statements so the meaning is true.

7–1 T••F Magnetic azimuths may differ from true azimuth by several degrees.

7–2 T••F The horizontal angle between the magnetic meridian and the true meridian is called the magnetic declination.

7–3 T••F Magnetic azimuth 1 magnetic declination 5 true azimuth.

7–4 T••F The magnetic declination does not change.

7–5 T••F The included angles of a four-sided polygon equal 360°.

7–6 T••F When drawing a plat based on angular information, you must convert bearings to azimuths or interior angles.

Part IV

Given the following groups of information, determine the distances on the earth’s surface. Use your knowledge of lengths of a degree of longitude and latitude. Provide your answer and show calculations where appropriate.

7–1 Calculate the distance between a point at 45° north latitude, 20° west longitude and a point 30° north latitude, 20° west longitude.

7–2 Calculate the distance between a point at 16° north latitude, 60° east longitude and a point at 28° south latitude, 60° east longitude.

7–3 Calculate the distance between a point at 50° north latitude, 80° west longitude and a point at 50° north latitude, 20° west longitude.

7–4 Calculate the length of a degree of longitude at 45° north latitude.

7–5 Calculate the length of a degree of longitude at 75° south latitude.

7–6 Calculate the true azimuth given the following information:

East magnetic azimuth = 32°

Magnetic declination = 15°E

7–7 Calculate the true azimuth given the following information:

East magnetic azimuth = 46°

Magnetic declination = 5°W

7–8 Calculate the true azimuth given the following information:

West magnetic azimuth = 18°

Magnetic declination = 7°E

7–9 Calculate the true azimuth given the following information:

East magnetic azimuth = 27°

Magnetic declination = 12°W

7–10 Calculate the true azimuth given the following information:

East magnetic azimuth = 19°45’12”

Magnetic declination = 4°50’39”E

7–11 Find the distance between a point at 10° north latitude, 80° west longitude and a point at 10° north latitude, 20° west longitude.

7–12 Determine the distance between a point at 72° north latitude, 28° west longitude to a point at 18° north latitude, 28° west longitude to a point at 18° north latitude, 42° west longitude.

7–13 Find the distance between point A at 30° north latitude, 110° east longitude and point B at 42° north latitude, 110° east longitude.

7–14 Find the distance between point A at 22° south latitude, 65° west longitude and point B at 22° south latitude, 79° west longitude.

7–15 Calculate the distance between point A at 45° north latitude and 15° west longitude, and point B at 40° north latitude and 30° west longitude.

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