Advance Surveying Sheet 10

With standard meridian as ${82}^0$ 30' E the standard time at longitude ${90}^0$ E is 8 h 30 m.The local mean time at the place will be

The hour angle of the heavenly body for Greenwich meridian equals the hour angle of the body for any other meridian+longitude:

The following points from a pair of homologous points :

Homologous points are                                                                                                      

To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30,000, with a camera of 30 cm focal length, the flying height is

Assuming human normal vision distance 25 cm, smallest measurable angle 20", and introcular distance 6.5 cm, the smallest depth to the discerned is

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

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

Pick up the correct statement from the following :                                                               

The rate of change of parallax dp/dh with respect to change in h, may be expressed as