Surveying
Equation of time which is the difference between apparent solar time and mean solar time at any instant, vanishes during one year

Twice
Four times
Thrice
Once

ANSWER DOWNLOAD EXAMIANS APP

Surveying
The difference between a level line and a horizontal line is that

level line is a curved line while hori-zontal line is a straight line
both are same
horizontal line is normal to plumb line while level line may not be normal to the plumb line
level line is normal to plumb line while horizontal line may not be normal to plumb line at the tangent point to level line

ANSWER DOWNLOAD EXAMIANS APP