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NAV-RH-MOD1-TEST LEARN
1.
The angle between the plane of the Equator and the plane of the Ecliptic is:
a) 66.5 deg
b) 23.5 deg
c) 25.3 deg
d) 65.6 deg
2.
At what approximate latitude is the length of one minute of arc along a meridian equal to one NM (1852 m) correct?
a) 45o
b) 0o
c) 90o
d) 30o
3.
The circumference of the Earth is approximately:
a) 43200 nm
b) 10800 nm
c) 21600 nm
d) 5400 nm
4.
In order to fly from position A (10o00N, 030o00W) to position B (30o00N), 050o00W), maintaining a constant true course, it is necessary to fly:
a) the great-circle route
b) the constant average drift route
c) a rhumb line track
d) a straight line plotted on a Lambert chart
5.
What is a line of equal magnetic variation?
a) An isocline
b) An isogonal
c) An isogriv
d) An isovar
6.
The circumference of the parallel of latitude at 60oN is approximately:
a) 10 800 NM
b) 18 706 NM
c) 20 000 NM
d) 34 641 NM
7.
The angle between the plane of the ecliptic and the plane of equator is approximately:
a) 27.5o
b) 25.3o
c) 23.5o
d) 66.5o
8.
Which of the following statements concerning the earth’s magnetic field is completely correct?
a) Dip is the angle between total magnetic field and vertical field component
b) The blue pole of the earth’s magnetic field is situated in North Canada
c) At the earth’s magnetic equator, the inclination varies depending on whether the geographic equator is north or south of the magnetic equator
d) The earth’s magnetic field can be classified as transient semi-permanent or permanent
9.
The maximum difference between geocentric and geodetic latitude occurs at about:
a) 90o North and South
b) 60o North and South
c) 45o North and South
d) 0o North and South (equator)
10.
Radio bearings:
a) are Rhumb lines
b) cut all meridians at the same angle
c) are Great circles
d) are lines of fixed direction
11.
How many nm are equivalent to 1o of arc of latitude:
a) 1 nm
b) 15 nm
c) 60 nm
d) 600 nm
12.
The earth may be referred to as:
a) round
b) an oblate spheroid
c) a globe
d) elliptical
13.
A line which cuts all meridians at the same angle is called a:
a) Line of variation
b) Great circle
c) Rhumb line
d) Agonic line
14.
Parallels of latitude, except the equator are:
a) both Rhumb lines and Great circles
b) Great circles
c) Rhumb lines
d) are neither Rhumb lines nor Great circles
15.
A Parallel of Latitude is a:
a) Great circle
b) Rhumb line
c) Small circle
d) Meridian of tangency
16.
The shortest distance between 2 point of the surface of the earth is:
a) a great circle
b) the arc of a great circle
c) half the rhumb line distance
d) Rhumb line
17.
Conversion angle is:
a) convergency
b) 4 times convergency
c) twice convergency
d) 0.5 convergency
18.
Generally what line lies closer to the pole?
a) Rhumb line
b) Orthodromic line
c) Equator
d) The rhumb line or great circle depending on the chart used
19.
The Earth is:
a) A sphere which has a larger polar circumference than equatorial circumference
b) A sphere whose centre is equidistant (the same distance) from the Poles and the Equator
c) Considered to be a perfect sphere as far as navigation is concerned
d) None of the above statements is correct
20.
At what time of the year is the Earth at its furthest point from the sun (aphelion)?
a) Early July
b) Late December
c) Early January
d) Mid-June
21.
The duration of civil twilight is the time:
a) between sunset and when the centre of the sun is 12o below the true horizon
b) agreed by the international aeronautical authorities which is 12 minutes
c) needed by the sun to move from the apparent height of 0o to the apparent height of 6o
d) between sunset and when the centre of the sun is 6o below the true horizon
22.
What is the definition of EAT?
a) Estimated on-blocks arrival time
b) Estimated time overhead the destination airfield
c) Estimated initial approach fix time
d) Estimated final approach fix time
23.
In which months is the difference between apparent noon and mean noon the greatest?
a) November and February
b) January and July
c) March and September
d) June and December
24.
What is the standard formula for convergency?
a) Convergency = dLat x sin mean latitude
b) Convergency = dLat x cos mean latitude
c) Convergency – dLong x cos mean latitude
d) Convergency = dLong x sin mean latitude
25.
Civil Twilight occurs between:
a) sunset and 6 deg below the horizon
b) 6 deg and 12 deg below the horizon
c) 12 deg and 18 deg below the horizon
d) sunrise and sunset
26.
Which is the highest latitude listed below at which the sun will rise above the horizon and set every day?
a) 62o
b) 68o
c) 72o
d) 66o
27.
The main reason that day and night, throughout the year, have different duration is due to the:
a) inclination of the ecliptic to the equator
b) earth’s rotation
c) relative speed of the sun along the ecliptic
d) gravitational effect of the sun and moon on the speed of rotation of the earth
28.
What is the meaning of the term standard time?
a) It is the time zone system applicable only in the USA
b) It is an expression for local mean time
c) It is another term for UTC
d) It is the time set by the legal authorities for a country or part of a country
29.
Civil twilight is defined by:
a) sun altitude is 12o below the celestial horizon
b) sun altitude is 18o below the celestial horizon
c) sun upper edge tangential to horizon
d) sun altitude is 6o below the celestial horizon
30.
Morning Civil twilight begins when:
a) the sun’s upper edge is tangential to the celestial horizon
b) the centre of the sun is 12o below the celestial horizon
c) the centre of the sun is 18o below the celestial horizon
d) the centre of the sun is 6o below the celestial horizon
31.
Which of the following alternatives is correct when you cross the international date line?
a) The date will increase if you are crossing on a westerly heading
b) The date will increase if you are crossing on a easterly heading
c) The date will always be the same
d) If you are crossing from westerly longitude to easterly longitude the date will remain the same
32.
The months in which the difference between apparent noon and mean noon is greatest are:
a) February and November
b) January and July
c) March and September
d) June and December
33.
Isogrives are lines that connect positions that have:
a) the same horizontal magnetic field strength
b) the same grivation
c) the same variation
d) 0o magnetic dip
34.
The north and south magnetic poles are the only positions on the earth’s surface where:
a) a freely suspended compass needle will stand horizontal
b) isogonals converge
c) a freely suspended compass needle will stand vertical
d) the value of magnetic variation equals 90o
35.
The lines on the earth’s surface that join points of equal magnetic variation are called:
a) isogrives
b) isoclines
c) isogonals
d) isotachs
36.
A great circle on the Earth running from the North Pole to the South Pole is called:
a) a longitude
b) a parallel of latitude
c) a difference of longitude
d) a meridian
37.
An aircraft is following the 45oN parallel of latitude. The track followed is a:
a) constant-heading track
b) rhumb line
c) great circle
d) constant-drift track
38.
How does the convergency of any two meridians on the Earth change with varying latitude?
a) It changes as cosine of latitude
b) It changes as sine of latitude
c) It increases with decrease of latitude
d) It is of constant value and does not change with latitude
39.
How many small circles can be drawn between any two points on a sphere?
a) One
b) None
c) An unlimited number
d) Two
40.
If you are flying along a parallel of latitude, you are flying:
a) a great circle track
b) on a north-south track
c) on a track which is constantly changing direction
d) a rhumb line track
41.
In which occasions does the rhumb line track and the great circle track coincide on the surface of the Earth?
a) On East-West tracks in polar areas
b) On high latitude tracks directly East-West
c) On East-West tracks in the northern hemisphere north of the magnetic equator
d) On tracks directly North-South and on East-West tracks along the Equator
42.
When flying on a westerly great circle track in the Southern Hemisphere you will:
a) fly a spiral and finally end up at the south pole
b) experience an increase in the value of true track
c) always have the rhumb line track between the departure point and the destination to the left of your great circle track
d) experience a decrease in the value of true track
43.
How many feet are there in a nm?
a) 3.280 ft
b) 5.280 ft
c) 6.080 ft
d) 1.000 ft
44.
How many feet are there in a km?
a) 3.280 ft
b) 5.280 ft
c) 6.080 ft
d) 1.000 ft
45.
How many centimetres are equivalent to 36.25 inches?
a) 92.08 cm
b) 0.014 m
c) 14.27 cm
d) 11.05 cm
46.
How many feet are equivalent to 9.5 km?
a) 31.160 ft
b) 50.160 ft
c) 57.760 ft
d) 9.500 ft
47.
A nautical mile is:
a) 1609 metres
b) 1852 metres
c) 1012 metres
d) 1500 metres
48.
What is the highest latitude listed below at which the sun will reach an altitude of 90o above the horizon at some time during the year?
a) 0o
b) 45o
c) 66o
d) 23o
49.
The International Nautical Mile defined by ICAO is equivalent to ___ m.
a) 1.582m
b) 1.652m
c) 1.852m
d) 1.962m
50.
Assuming mid-latitudes (40o to 50o N/S). At which time of year is the relationship between the length of day and night, as well as the rate of change of declination of the sun, changing at the greatest rate?
a) Summer solstice and spring equinox
b) Spring equinox and autumn equinox
c) Summer solstice and winter solstice
d) Winter solstice and autumn equinox
51.
What is the approximate date of perihelion, when the Earth is nearest to the Sun?
a) Beginning of January
b) End of December
c) Beginning of July
d) End of March
52.
At what approximate date is the earth furthest from the sun (aphelion)?
a) Beginning of July
b) End of December
c) Beginning of January
d) End of September
53.
Seasons are due to the:
a) Earth’s elliptical orbit around the Sun
b) inclination of the polar axis with the ecliptic plane
c) Earth’s rotation on its polar axis
d) variable distance between Earth and Sun
54.
The diameter of the Earth is approximately:
a) 18 500 km
b) 6 350 km
c) 12 700 km
d) 40 000 km
55.
At what approximate date is the earth closest to the sun (perihelion)?
a) End of June
b) End of March
c) Beginning of July
d) Beginning of January
56.
In which two months of the year is the difference between the transit of the Apparent Sun and mean Sun across the Greenwich Meridian the greatest?
a) March and September
b) February and November
c) June and December
d) April and August
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