Earth

Question 1

Shape of earth

Answer 1

Oblate spheroid OR
Ellipsoid

Question 2

Diameter of Eq

Answer 2

6888nm

Question 3

Diameter of poles

Answer 3

6865nm

Question 4

Diameter of Eq > diameter of poles by how much

Answer 4

23nm

Question 5

Compression ratio

Answer 5

0.3%

Question 6

Rotation of earth viewed from North Pole

Answer 6

Anti clockwise

Question 7

Rotation of earth viewed from South Pole

Answer 7

Clockwise

Question 8

Earth rotatary direction

Answer 8

West to east

Question 9

Inclination of the earth from orbital plane ie equatorial plane

Answer 9

66.5deg

Question 10

Inclination of earth from normal plane or polar plane

Answer 10

23.5 deg

Question 11

Graticule is a network bw ___ and ___

Answer 11

Latitude and longitude

Question 12

How many gc drawn if 2 points NOT diametrically opp

Answer 12

1

Question 13

How many gc drawn if 2 points diametrically opp

Answer 13

Infinite

Question 14

Max longitude
Max latitude

Answer 14

180deg east/ west
90deg north/south

Question 15

Great circle has ___ radius and ____ centre as that of the earth

Answer 15

Same radius and same centre

Question 16

What is GC

Answer 16

Largest possible circle divides the earth into 2 equal halves

Question 17

Gc gives ___ routes

Answer 17

Shortest

Question 18

Radio signals follow ___

Answer 18

Gc path

Question 19

GC example

Answer 19

Equator ,meridian and anti meridian

Question 20

Small circle is ?

Answer 20

Any circle smaller than gc and doesn’t not divide earth into 2 equal halves

Question 21

Small circle example

Answer 21

Parallels of latitude

Question 22

Latitude ?

Answer 22

The angular distance measured along a meridian from the equator to a parallel of the latitude, measured in degrees, minutes, and seconds and named North or South.

Question 23

Rhumb line /loxodrome

Answer 23

Regularly curved lines on earths surface which cuts all meridians at SAME ANGLE

Question 24

Rhumbline gives

Answer 24

Constant true direction

Question 25

RL distance >GC distance True or false

Answer 25

True

Question 26

RL position at poles

Answer 26

Spiral

Question 27

Equator is gc and RL true or false

Answer 27

True

Question 28

Geodetic lat >geocentric lat True or false

Answer 28

True, geodetic or geographic lat is greater than geocentric

Question 29

Max diff bw geodetic and geocentric is @

Answer 29

45deg latitude; 11.6min

Question 30

Cardinal pts

Answer 30

0 or 360 deg 90deg 180deg 270deg

Question 31

Quadrantal points

Answer 31

45deg (NE) 135deg(SE) 225deg(SW) 315deg(NW)

Question 32

On real earth , GC and RL

Answer 32

GC- straight lines  RL - curved line

Question 33

On paper , GC and RL

Answer 33

RL- straight line GC -curved line

Question 34

Only ____ is a semi GC

Answer 34

Meridian