Imp questions on surveying for civil engineering aspirants Part 05

1)The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known

A. a simple curve

B. a compound curve

C. a reverse curve

D. a vertical curve.

Answer:  C

2)The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescope's

A. resolving power

B. brightness

C. field of view

D. magnification.


3)The bubble tube is nearly filled with

A. alcohol or chloroform

B. a liquid which is very mobile

C. a liquid having low freezing point

D. all the above.

Answer: D

4)In a constant level tube, size of the bubble remains constant because upper wall is

A. of relatively larger radius

B. of relatively smaller radius

C. flat

D. convex downwards.

Answer:  A

5)Pick up the correct statement from the following :

A. A level surface is perpendicular at all points to the direction of gravity

B. A level line lies in level surface

C. A horizontal surface is normal to the direction of gravity at only one point

D. A horizontal line is tangential to the level surface

E. All the above.

Answer:  E

6)Removal of parallax, may be achieved by focussing

A. the objective

B. the eye-piece

C. the objective and the eye-piece

D. none of these.

Answer: C

7)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.

Answer: C

8)In reciprocal levelling, the error which is not completely eliminated, is due to

A. earth's curvature

B. non-adjustment of line of collimation

C. refraction

D. non-adjustment of the bubble tube.

Answer: C

9)Prismatic compass is considered more accurate than a surveyor's compass, because

A. it is provided with a better magnetic needle

B. it is provided with a sliding glass in the object vane

C. its graduations are in whole circle bearings

D. it is provided with a prism to facilitate reading of its graduated circle

E. both (c) and (d).

Answer: D

10)The direction of steepest slope on a contour, is

A. along the contour

B. at an angle of 45° to the contour

C. at right angles to the contour

D. none of these.

Answer: C

11)Imaginary line passing through points having equal magnetic declination is termed as

A. isogon

B. agonic line

C. isoclinic line

D. none of these.

Answer: A

12)The longitudinal section of the surface of bubble tube is

A. straight

B. circular

C. parabolic

D. elliptic.

Answer: B

13)In an internal focusing telescope

A. the objective is at a fixed distance from the diaphragm

B. the focusing is done by the sliding of a divergent lens.

C. the focusing divergent lens is situated at about the middle of the tube

D. all the above.

Answer: D

14)Back bearing of a line is equal to

A. Fore bearing ± 90°

B. Fore bearing ± 180°

C. Fore bearing ± 360°

D. Fore bearing ± 270°

Answer: B

15)The main plate of a transit is divided into 1080 equal divisions. 60 divisions of the vernier coincide exactly with 59 divisions of the main plate. The transit can read angles accurate upto

A. 5"

B. 10"

C. 15"

D. 20"

E. 30"

Answer: D

16)While rotating the theodolite in the horizontal plane, the bubble of the bubble tube takes up the same position in its tube, it indicates

A. the rotation axis is vertical

B. the trummion axis is horizontal

C. the line of collimation is perpendicular to vertical axis

D. none of the above

Answer:  A

17)A theodolite is said to be in perfect adjustment if

A. rotation axis is vertical to the transit axis

B. transit axis is perpendicular to line of collimation

C. line of collimation sweeps out a vertical plane while the telescope is elevated or depressed

D. all the above.

Answer:  D

18)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.


19)The true meridian of a place is the line in which earth's surface is intersected by a plane through

A. east and west points

B. zenith and nadir points

C. north and south geographical poles

D. north and south magnetic poles.

Answer:  C

20)The Random errors tend to accumulate proportionally to

A. numbers of operations involved

B. reciprocal of operations involved

C. square root of the number of operation involved

D. cube root of the number of operation involved.

Answer:  C

21)While measuring a chain line between two stations A and B intervened by a raised ground

A. vision gets obstructed

B. chaining gets obstructed

C. both vision and chaining get obstructed

D. all the above.

Answer:  A

22)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.

Answer:  C

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