Surveying MCQs Ch 8 Tacheometry

Surveying MCQs 
Chapter 8 

Tacheometry

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Surveying MCQs 
Chapter 8 

Tacheometry

Q.1. For tacheometer the additive and multiplying constants respectively are 

a) 0 and 100 ✔

b) 0 and 0

c) 100 and 0

d) 100 and 100

In tacheometer for anallactic lees, additive and Multiplying constant are 0 and 100 respectively.

Q.2. The multiplying constant of a theodolite is : 

a) f + d

b) f/i + d

c) f/d + i

d) f/i ✔

Multiplying constant = f/i
Additive constant = f + d

Q.3. An anallatic lens Is provided in a: 

a) Theodolite

b) Tacheometer ✔

c) Dumpy level

d) Prismatic compass

Q.4. Calculate the horizontal distance between the staff and instrument, if the staff readings are 1.4 and 2.9 m. Which corresponds to lower and the upper horizontal lines of cross hair. The lens of the telescope of the tachometer is of anallactic lens. 

a) 100

b) 140

c) 150 ✔

d) 200

Telescope of Tachometer is of anallactic lens so multiplying constant.
K = 100 and additive constant. C = 0
Staff intercept, S = 2.9 - 1.4 = 1.5 m
Horizontal distance between staff and vertical axis of tachometer is given by
D = KS + C
D= KS
D = 100 x1.5
=150m

Q.5. Calculate the additive and multiplying constant, if the focal length of the objective glass is 250 mm, stadia intercept is 2 mm and instance of the instrument axis from the center of the object is 190 mm. 

a) 95, 440 mm

b) 440, 95 mm

c) 125, 440 mm

d) 440, 125 mm ✔

Focal length of the objective, f = 250 mm
Stadia interval, i = 2mm
Distance between Instrument axis and optical centre,
d = 190 mm
K =f/i = 250/2 =125mm
C = f + d = 250 + 190 = 440 mm
Additive constant. C = 440 mm
Multiplying constant. K = 125 mm

Q.6. Calculate the Intersect angle (degree) for the anallactic telescope. 

a) 0.467

b) 0.573 ✔

c) 0.592

d) 0.596

Q.7. Calculate the distance between the instrument and the staff readings are 1.56m, 2.05m and 2.56m. The multiplying constant is 100 additive constant Is 10. 

a) 64

b) 110 ✔

c) 112

d) 215.67

Staff reading = 1.56, 2.05, 2.56m
Multiplying constant, K = 100
Additive constant, C = 10
Distance between the instrument and the staff is given by
D = KS + C
Staff intercept, (S) = 2.56 - 1.56 = 1 m
D = 100 x 1 + 10 = 110m

Q.8. A transit theodolite fitted with a stadia diaphragm and anallatic lens is known as a / an 

a) Tacheometer ✔

b) Subtense theodolite

c) Astronomical theodolite

d) Auto Level

Q.9. The stadia diaphragm is provided for measuring

a) Elevation

b) Bearing

c) Horizontal distance ✔

d) Horizontal angle

Q.10. When the line of sight is inclined and the staff is held vertically, the horizontal distance is given by 

a) f/i x S cos² θ + (f+d) cos θ  ✔

b) f/i x S sin² θ + (f+d) sin θ

c) f/i x S cot² θ + (f+d)cot θ

d) None of these

Please comment for any improvement 

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