# Practice Test: Question Set - 06

**1. Select the correct statement.**

- (A) Contour
interval on any map is kept constant

- (B) Direct
method of contouring is cheaper than indirect method

- (C) Intervisibility
of points on a contour map cannot be ascertained

- (D) Slope
of a hill cannot be determined with the help of contours

**2. In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to**

- (A) Ease
of reduction of observations

- (B) Facility of
holding

- (C) Minimum
effect of careless holding on the result

- (D) None
of these

**3. Whole circle bearing of a line is preferred to a quadrantal bearing merely because**

- (A) Bearing is
not completely specified by an angle

- (B) Bearing
is completely specified by an angle

- (C) Sign
of the correction of magnetic declination is different in different quadrants

- (D) Its
Trigonometrical values may be extracted from ordinary tables easily

**4. It is more difficult to obtain good results while measuring horizontal distance by stepping**

- (A) Up-hill

- (B) Down-hill

- (C) In
low undulations

- (D) In plane
areas

**5. Pick up the correct statement from the following:**

- (A) The
apparent error on reversal is twice the actual error

- (B) The
correction may be made equal to half the observed discrepancy

- (C) The good
results may be obtained from a defective instrument by reversing and taking the
mean of two erroneous results

- (D) All the
above

**6. Which of the following methods of plane table surveying is used to locate the position of an inaccessible point?**

- (A) Radiation

- (B) Intersection

- (C) Traversing

- (D) Resection

**7. Imaginary line passing through points having equal magnetic declination is termed as**

- (A) Isogon

- (B) Agonic line

- (C) Isoclinic
line

- (D) None
of these

**8. Which one of the following statements is correct?**

- (A) When the
axes of rotation of the graduated circle and the verniers are not coincident,
the instrument possesses eccentricity

- (B) The mean of
the readings of the two verniers gives correct reading free from the
eccentricity

- (C) One
Vernier may be used if the readings of two verniers differ by a constant

- (D) All the
above

**9. In geodetic surveys higher accuracy is achieved, if**

- (A) Curvature of
the earth surface is ignored

- (B) Curvature of
the earth surface is taken into account

- (C) Angles
between the curved lines are treated as plane angles

- (D) None of
these

**10. The bearings of the lines**

*AB*and*BC*are 146° 30' and 68° 30'. The included angle*ABC*is- (A) 102°

- (B) 78°

- (C) 45°

- (D) None of
these

**11. Transit rule of adjusting the consecutive coordinates of a traverse is used where**

- (A) Linear and
angular measurements of the traverse are of equal accuracy

- (B) Angular
measurements are more accurate than linear measurements

- (C) Linear
measurements are more accurate than angular measurements

- (D) All of the
above

**12. Pick up the correct statement from the following:**

- (A) The
lines of sight while observing back sight and fore sight lie in the same
horizontal plane

- (B) The
staff readings are measurements made vertically downwards from a horizontal
plane

- (C) The
horizontal plane with reference to which staff readings are taken, coincides
with the level surface through the telescope axis

- (D) All the
above

**13. The operation of resection involves the following steps**

**Rough orientation of the plane table****The three lines form a triangle of error****Drawing lines back through the three control points****Select a point in the triangle of error such that each ray is equally rotated either clockwise or anti clockwise****The points obtained by three rays are the correct location.**

**The correct sequence is**

- (A) 1, 3, 2, 4,
5

- (B) 1, 2, 3, 4,
5

- (C) 1, 4, 3, 2,
5

- (D) 1, 3, 2, 4,
5

**14. The lens equation 1/**

*f*= 1/*f*_{1}+ 1/*f*_{2}is applicable- (A) When
the thickness of the lens is small

- (B) Only to
conjugate distances along the principal axis

- (C) The
computed quantities are accurate enough for geometrical optics of simple
distances

- (D) All the
above

**15. For true difference in elevations between two points ‘**

*A’*and ‘*B’*, the level must be set up- (A) At any point
between

*A*and

*B*

- (B) At the exact
midpoint of

*A*and

*B*

- (C) Near the
point

*A*

- (D) Near the
point

*B*

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