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. A20 mchain was used to measure the length of line and was found as 500 m. Later
it was found that the chain was 0.05 m too long. What is the true length of line ?

A) 500.25 B) 498.75 C) 499.75 D) 501.25

. Primary line plotted on paper is called
A) Tie line B) Check line
C) Base line D) Boundary line

. The line normal to a level surface is known as
A) Level line B) Plumb line
C) Line of collimation D) Horizontal line

. What is/are principle/s of plane table surveying ?

i. An unknown point can be fixed by knowing its directions from two known
positions.

ர்‌. The whole plot is divided into right angled triangles and trapezium, computing
individual areas and adding these areas together to get the area of whole plot.

A) ionly B) ii only
C) iandii D) None of these

. Which of the following is/are errors due to the external forces in compass survey ?
i. Variations in declination
ii. Incorrect centering
iii. Local attraction
A) ionly B) ii and iii only
C) iii only D) i and iii only

. The line joining the optical center of object glass to the center of the eye piece is
known as

A) Axis of level tube B) Horizontal axis
C) Axis of telescope D) Line of sight

. Tellurometer uses of EM spectrum.
A) Light waves B) Radio waves
C) Infrared rays D) Gamma rays