# Imp questions on surveying for civil engineering aspirants Part 04

1) Centering error of a theodolite produces an error

A. in all angles equally

B. which does not vary with the direction or pointing

C. which varies with the direction of pointing and inversely with the length of sight

D. none of these.

2) In levelling operation

A. if second reading is more than first, it represents a rise

B. if first reading is more than second, it represents a rise

C. if first reading is less than second, it represents a fall

D. if second reading is less than first, it represents a fall

E. both (b) and (c).

3) The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known

A. balancing the sights

B. balancing the departures

C. balancing the latitudes

D. balancing the traverse.

4) Orientation of a plane table by solving two point problem is only adopted when

A. saving of time is a main factor

B. better accuracy is a main factor

C. given points are inaccessible

D. none of these.

5) A back sight

A. is always taken on a point of known elevation or can be computed

B. is added to the known level to obtain the instrument height

C. taken on an inverted staff is treated as negative

D. all the above.

6) The systematic errors which persist and have regular effects in the performance of a survey operation, are due to

A. carelessness

B. faulty instrument

C. inattention

D. none of these.

7) The best method of interpolation of contours, is by

A. estimation

B. graphical means

C. computation

D. all of these.

A. embankment on the centre line

B. excavation on the centre line

C. earth work on the centre line

D. none of these.

9) Measuring with a 30 m chain, 0.01 m too short, introduces

A. positive compensating error

B. negative compensating error

C. positive cumulative error

D. negative cumulative error.

10) Setting out a curve by two theodolite method, involves

A. linear measurements only

B. angular measurements only

C. both linear and angular measurements

D. none of these.

11) When the bubble of the level tube of a level, remains central

A. line of sight is horizontal

B. axis of the telescope is horizontal

C. line of collimation is horizontal

D. geometrical axis of the telescope is horizontal.

12) Pick up the correct statement from the following :

A. the power of a lens is the reciprocal of its focal length

B. the unit of power of the lens is diopter

C. the power of two or more thin lenses in contact is the power of the combination of the lenses

D. all the above.

13) The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known

A. declination

B. azimuth

C. dip

D. bearing.

14) A relatively fixed point of known elevation above datum, is called

A. bench mark

B. datum point

C. reduced level

D. reference point.

15) Cross hairs in surveying telescopes, are fitted

A. in the objective glass

B. at the centre of the telescope

C. at the optical centre of the eye piece

D. in front of the eye piece.

16) Metric chains are generally available in

A. 10 m and 20 m length

B. 15 m and 20 m length

C. 20 m and 30 m length

D. 25 m and 100 m length

17) On a diagonal scale, it is possible to read up to

A. one dimension

B. two dimensions

C. three dimensions

D. four dimensions.

18) Plotting of inaccessible points on a plane table, is done by

A. intersection

B. traversing