# Practice Test: Question Set - 27

**1. The probable error of the adjusted bearing at the middle is**

- (A) ½

*r √n*

- (B) ⅓

*r √n*

- (C) ¼

*r √n*

- (D) ⅕

*r √n*

**2. If whole circle bearing of a line is 120°, its reduced bearing is**

- (A)

*S*20°

*E*

- (B)

*S*60°

*E*

- (C)

*N*120°

*E*

- (D)

*N*60°

*E*

**3. For locating a distant object visible from two transit stations, the method usually preferred to, is**

- (A) Angles
and distances from transit stations

- (B) Angles
from two transit stations

- (C) Distance
from two transit stations

- (D) Angle from
one transit station and distance from the other

**4. Accuracy of 'fix' by two point problem, is**

- (A) Bad

- (B) Good

- (C) Not reliable

- (D) Unique

**5. If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is**

- (A) Measured
area × (Length of chain used/Nominal chain length)

- (B) Measured
area × (Nominal chain length/ Length of chain used)

- (C) Measured
area × (Nominal chain length/ Length of chain used)

^{2}

- (D) Measured
area × (Length of chain used/Nominal chain length)

^{2}

**6. A tape of length ‘**

*l’*and weight ‘*W’*kg/m is suspended at its ends with a pull of ‘*P’*kg, the sag correction is- (A)

*l*24

^{3}W^{2}/*P*

^{2}- (B)

*l*24

^{2}W^{3}/*P*

^{2}- (C)

*l*24

^{2}W^{2}/*P*

^{3}

- (D)

*lW*24

^{2}/*P*

**7. Contour lines of different elevations can unite to form one line, only in the case of**

- (A) A vertical
cliff

- (B) A saddle

- (C) A water shed
line

- (D) A hill top

**8. The sag of 50 m tape weighing 4 kg under 5 kg tension is roughly**

- (A) 0.043 m

- (B) 0.053 m

- (C) 0.063 m

- (D) 0.083 m

**9. If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum perpendicular offset for the transition curve, is**

- (A) 0.70 m

- (B) 1.70 m

- (C) 2.70 m

- (D) 3.70 m

**10. The longitudinal section of the surface of bubble tube is**

- (A) Straight

- (B) Circular

- (C) Parabolic

- (D) Elliptic

**11. A traverse deflection angle is**

- (A) Less than
90°

- (B) More than
90° but less than 180°

- (C) The
difference between the included angle and 180°

- (D) The
difference between 360° and the included angle

**12. The least count of a Vernier scale is**

- (A) Sum of the
smallest divisions of main and Vernier scales

- (B) Value
of one division of the primary scale divided by total number of divisions of
Vernier scale

- (C) Value
of one division of Vernier scale divided by total number of divisions of
primary scale

- (D) None of
these

**13. The tangent to the liquid surface in a level tube, is parallel to the axis of the level tube at**

- (A) Every point
of the bubble

- (B) Either end
of the bubble

- (C) The
mid-point of the bubble

- (D) No where

**14. The slope correction may be ignored if**

- (A) The slope of
the ground is less than 3°

- (B) To slope of
the ground is say 1 in 19

- (C) Both (a) and
(b)

- (D) Neither (a)
nor (b)

**15. The whole circle bearing of a line is 290°. Its reduced bearing is**

- (A)

*N*20°

*E*

- (B)

*N*20°

*W*

- (C)

*N*70°

*W*

- (D)

*S*70°

*E*

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