Surveying problems
- 1. The power of a lens
Options- A. is reciprocal of its focal length
- B. is positive if it is a convex lens
- C. is negative if it is a concave lens
- D. is measured in diopter. Discuss
Correct Answer: is measured in diopter.
- 2. An angle of deflection right, may be directly obtained by setting the instrument to read
Options- A. zero on back station
- B. 180° on back station
- C. 90°
- D. 270° on back station. Discuss
Correct Answer: zero on back station
- 3. The reduced bearing of a line is N 87° W. Its whole circle bearing is
Options- A. 87°
- B. 273°
- C. 93°
- D. 3° Discuss
Correct Answer: 273°
- 4. Accurate measurement of deflection angles with a transit not properly adjusted may be made by
Options- A. setting the vernier A at zero at back station and then plunging the telescope
- B. setting the vernier A at zero at back station and turning the instrument to the forward station
- C. taking two back sights one with the telescope normal and the other with telescope inverted
- D. none of these. Discuss
Correct Answer: taking two back sights one with the telescope normal and the other with telescope inverted
- 5. If whole circle bearing of a line is 120°, its reduced bearing is
Options- A. S 20° E
- B. S 60° E
- C. N 120° E
- D. N 60° E. Discuss
Correct Answer: S 60° E
- 6. Transition curves are introduced at either end of a circular curve, to obtain
Options- A. gradually decrease of curvature from zero at the tangent point to the specified quantity at the junction of the transition curve with main curve
- B. gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
- C. gradual change of gradient from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
- D. none of these. Discuss
Correct Answer: gradual increase of super-elevation from zero at the tangent point to the specified amount at the junction of the transition curve with main curve
- 7. The distance between the point of intersection of an up grade + g1% and downgrade g2% and the highest point of the vertical curve of length L, is
Options- A.
- B.
- C.
- D.
.
Discuss
Correct Answer:
. - 8. If L is in kilometres, the curvature correction is
Options- A. 58.2 L2 mm
- B. 64.8 L2 mm
- C. 74.8 L2 mm
- D. 78.4 L2 mm. Discuss
Correct Answer: 78.4 L2 mm.
- 9. A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 106 kg/cm2, the correction to be applied is
Options- A. - 0.000909 m
- B. + 0.0909 m
- C. 0.000909 m
- D. none of these Discuss
Correct Answer: - 0.000909 m
- 10. The zero of the graduated circle of a prismatic compass is located at
Options- A. north end
- B. east end
- C. south end
- D. west end. Discuss
Correct Answer: south end
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