Surveying
If the distance between the projectors is altered by a movement along X-axis of one projector,

The length of the air base is increased
All listed here
y-parallax is not affected
The scale of the model is altered

ANSWER DOWNLOAD EXAMIANS APP

Surveying
If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference toi) altitude bubble on index frameii) altitude bubble on index frame if it is to be used as a leveliii) altitude bubble on telescopeiv) altitude bubble on telescope if it is to be used as a level The correct answer is

only (iii)
both (ii) and (iii)
only (i)
both (i) and (iv)

ANSWER DOWNLOAD EXAMIANS APP