The difference of parallax for a given difference in elevation is independent of

The parallax equation $$\Delta {\text{p}} = \frac{{{\text{Bm}}\Delta {\text{h}}}}{{{\text{H}} - {\text{h}}}}$$ is applicable to entire overlap of the photographs only if parallax is measured

A

Normal to base line

B

Parallel to base line

C

Both (A) and (B)

D

Neither (A) nor (B)

Consider the following statements regarding ICAO recommendation for correction to basic runway length of these statements
1. The basic runway length should be increased at the rate of 7 percent per 300 m rise in elevation above the mean sea level.
2. The basic runway length after having been corrected for elevation should be further increased at the rate of 1 percent for every 1°C rise in airport reference temperature above the standard atmospheric temperature at that elevation.
3. The runway length after having been corrected for elevation and temperature should be further increased at the rate of 20% for every 1 percent of effective gradient.

A

1 and 2 are correct

B

2 and 3 are correct

C

1 and 3 are correct

D

1, 2 and 3 are correct

$$\alpha $$ and $$\beta $$ are the angles subtended by a point of elevation h at their air station with respective plumb points. Photo scale and focal length of the lens being ‘S’ and ‘f’ respectively. Parallax displacement of the point due to relief, is

A

$$\frac{{{\text{h}}\tan \alpha }}{{\text{S}}}$$

B

$$\frac{{{\text{h}}\tan \beta }}{{\text{S}}}$$

C

$$\frac{{{\text{h}}\left( {\tan \alpha + \tan \beta } \right)}}{{\text{S}}}$$

D

$$\frac{{{\text{h}}\left( {\tan \alpha - \tan \beta } \right)}}{{\text{S}}}$$

The angle of elevation of the top of a tower from a certain point is 30°. If the observed moves 20 m towards the tower, the angle of elevation the angle of elevation of top of the tower increases by 15°. The height of the tower is

A

17.3 m

B

21.9 m

C

27.3 m

D

30 m

If flying height of a spacecraft is H, the length of air base is B and the parallax difference between two points is dp, then the difference in height

A

$${\text{h}} = \frac{{{\text{dp}}}}{{\frac{{\text{B}}}{{\text{H}}}}}$$

B

$${\text{h}} = \frac{{\text{B}}}{{\text{H}}} \times {\text{dp}}$$

C

$${\text{h}} = \frac{{{\text{dp}}}}{{\frac{{\text{H}}}{{\text{B}}}}}$$

D

$${\text{h}} = {\text{BHbp}}$$

The difference of height of two points whose parallax difference is 0.8 mm on a pair of stereo pair taken from a height ‘H’ is 100 m. If mean photo base is 95.2 mm, the flying height is

A

8,000 m

B

10,000 m

C

12,000 m

D

14,000 m

In order to find the difference in elevation between two points P and Q, a level was set upon the line PQ, 30 m from P and 1280 m from Q. The reading obtained on staff kept at P and Q were respectively 0.545 m and 3.920 m. Find the true difference in elevation between P and Q?

A

3.226 m

B

3.343 m

C

3.265 m

D

3.345 m

Difference in parallax can be obtained due to___________

A

Distance between zenith

B

Distance between bearing

C

Distance between azimuth

D

Distance between points sights

23 cm × 23 cm photographs are taken from a flying height with a camera of focal length of 3600 m and 15.23 cm respectively. A parallax difference of 0.01 mm represents

A

1 m

B

2 m

C

4 m

D

8 m

Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer :

Statements : The President of XYZ Party indicated that 25 independent Members of Legislative Assembly (MLA) are seriously considering various options of joining some political party. But in any case all of them collectively will join one party only.

Conclusions :
I. The 25 independent MLAs will join XYZ party in a short period of time.
II. The 25 independent MLAs will join some other political party in a short period of time.

A

Only conclusion I follows

B

Only conclusion II follows

C

Either I or II follows

D

Neither I nor II follows

E

Both I and II follow

The difference of parallax for a given difference in elevation is independent of

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