# Practice Test: Question Set - 10

**1. Closed contours, with higher value inwards, represent a**

- (A) Depression

- (B) Hillock

- (C) Plain
surface

- (D) None of the
above

**2. If ‘**

*h’*is the difference in height between end points of a chain of length ‘*l’*, the required slope correction is- (A)

*h*

^{2}/2

*l*

- (B)

*h*/2

*l*

- (C)

*h*

^{2}/

*l*

- (D) 2

*h*

^{2}/2

*l*

**3. The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as**

- (A) Plane
alidade

- (B) Telescopic
alidade

- (C) Clinometer

- (D) Tacheometer

**4. Pick up the correct statement from the following**

- (A) The contour
lines having the same elevation cannot unite and continue as one line

- (B) A
contour can not end abruptly, but must ultimately close itself not necessarily
within the limits of map

- (C) The
direction of steepest slope at a point on a contour is at right angles to the
contour

- (D) All the
above

**5. An imaginary line joining the points of equal elevation on the surface of the earth, represents**

- (A) Contour
surface

- (B) Contour
gradient

- (C) Contour line

- (D) Level line

**6. If in a closed traverse, the sum of the north latitudes is more than the sum of the south latitudes and also the sum of west departures than the sum of the east departures, the bearing of the closing line is in the**

- (A)

*NE*quadrant

- (B)

*SE*quadrant

- (C)

*NW*quadrant

- (D)

*SW*quadrant

**7. The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescopes**

- (A) Resolving
power

- (B) Brightness

- (C) Field of
view

- (D) Magnification

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

- (A) Mistakes
arise from inattention, inexperience or carelessness

- (B) Systematic
errors persist and have regular effects in the survey performances

- (C) Accidental
errors occur inspite of every precaution is taken

- (D) All the
above

**9. To orient a plane table at a point with two inaccessible points, the method generally adopted, is**

- (A) Intersection

- (B) Resection

- (C) Radiation

- (D) Two point
problem

**10. In quadrantal bearing system, back bearing of a line may be obtained from its forward bearing, by**

- (A) Adding 180°,
if the given bearing is less than 180°

- (B) Subtracting
180°, if the given bearing, is more than 180°

- (C) Changing the
cardinal points, i.e. substituting N for S and E for W and vice-versa

- (D) None of
these

**11. If the horizontal distance between the staff point and the point of observation is‘d’, then the error due to curvature of earth is proportional**

- (A)

*d*

- (B) 1/

*d*

- (C)

*d*

^{2}

- (D) 1/

*d*

^{2}

**12. Back bearing of a line is equal to**

- (A) Fore bearing
± 90°

- (B) Fore bearing
± 180°

- (C) Fore bearing
± 360°

- (D) Fore bearing
± 270°

**13. To orient a plane table at a point ‘**

*P’*roughly south of the mid-point of two inaccessible conical hill stations ‘*A’*and ‘*B’*in the plains, a point ‘*C’*is selected in line with*AB*and table is oriented at ‘*C’*by bringing*ab*in line with*AB*.*A*ray is then drawn towards ‘*P’*and at ‘*P’*the table is oriented by back ray method. The orientation so obtained, is- (A) Unique and
correct

- (B) Incorrect

- (C) Manifold and
correct

- (D) Not reliable

**14. While setting a plane table at a station it was found that the error in centering was 30 cm away from the ray of length 40 m drawn from the station. If the scale of the plan is 1 cm = 2 cm, the displacement of the end of the ray in plan from the true position will be**

- (A) 0.02 cm

- (B) 0.15 cm

- (C) 0.2 cm

- (D) 0.1 cm

**15. If ‘θ’ is the slope of the ground and ‘**

*l’*is the measured distance, the correction is- (A) 2

*l*sin

^{2}θ/2

- (B) 2

*l*cos

^{2}θ/2

- (C) 2

*l*tan

^{2}θ/2

- (D) 2

*l*cot

^{2}θ/2

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