## Surveying MCQ Practice Questions (Civil Engineering) Set 13

##### Pick up the correct statement from the following:

Options are :

• It is difficult to eliminate an error completely at first trial
• Instability of the instrument makes it almost impossible to adjust it satisfactorily
• All the above
• Adjustment screws must be left bearing firmly but should never be forced

##### The length of a traverse leg may be obtained by multiplying the latitude and:

Options are :

• Secant of its reduced bearing
• Cosine of its reduced bearing
• Sine of its reduced bearing
• Tangent of its reduced bearing

Answer :Secant of its reduced bearing

##### Surveys which are carried out to provide a national grid of control for preparation of accurate maps of large areas, are known:

Options are :

• Geodetic surveys
• Geographical surveys
• Topographical surveys
• Plane surveys

Options are :

• Idgah
• Fort
• Church
• Mosque
• Temple

Options are :

• 5 cm
• 1 cm
• 100 cm
• 10 cm

##### Pick up the correct statement from the following:

Options are :

• The first sight on each change point is a fore sight
• A back sight is the first sight taken after setting up the instrument in any position
• An observation or the resulting reading with the level on a levelling staff is called sight
• All the above
• The second sight on each change point is a back sight

##### In tangential tacheometry, an ordinary level staff is used:

Options are :

• Leaning away from the instrument for inclined sights downwards
• Vertical in all cases
• Leaning towards the instrument for inclined sights upward
• None of these

##### Horizontal distances obtained tacheometerically are corrected for:

Options are :

• Temperature correction
• Slope correction
• All the above
• Refraction and curvature correction

Options are :

• 25 ?3 m
• 50 m
• 50 ?3 m
• 25 m

##### The distances AC and BC are measured from two fixed points A and B whose distance AB is known. The point C is plotted by intersection. This method is generally adopted in:

Options are :

• None of these
• Chain surveying
• Traverse method of surveys
• Triangulation

Options are :

• Mosque
• Idgah
• Temple
• Church

##### In a theodolite:

Options are :

• The axis of rotation is perpendicular to transit axis
• All the above
• The telescope axis, the transit axis and the rotation axis pass through the centre of theodolite
• The telescope axis is perpendicular to transit axis

Options are :

• 1°43' 18"
• 1°43' 28"
• 1°43' 08"
• 1°43' 38"

##### If the length of a chain line along a slope of ?° is l, the required slope correction is:

Options are :

• 2l cos^(2) ?/2
• l cos2 ?/2
• l tan2 ?/2
• 2l sin^(2) ?/2

##### Pick up the correct statement from the following:

Options are :

• The traverse that starts from a point already fixed in some survey system and ends on another such point, is called a controlled traverse
• The system of a series of lines which forms a circuit which ends at the starting point, is called a closed traverse
• All the above
• The traverse that is not controlled is called a fly traverse
• The framework which consists of a series of connected lines, the lengths and directions of which are found from measurements, is called a traverse

Options are :

• 120°
• 150°
• 30°
• 90°
• 60°

##### The imaginary line passing through the intersection of cross hairs and the optical centre of the objective, is known as:

Options are :

• Axis of the telescope
• Line of collimation
• None of these
• Line of sight

Options are :

• D
• A
• B
• C

##### If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on:

Options are :

• Staff vertical
• Staff normal
• Staff normal as well as vertical
• None of these

Options are :

• 260 sq km
• 200 sq km
• 160 sq km
• 100 sq km

##### An angles of 45° with a chain line may be set out with:

Options are :

• Fench cross staff
• Prismatic square
• Open cross staff
• Optical square

Options are :

• 0.073 m
• 0.063 m
• 0.053 m
• 0.043 m
• 0.083 m

##### Pick up the correct statement from the following:

Options are :

• To locate a gross error due to taping in a controlled traverse, we plot the traverse to a convenient scale. The bearing of the closing error will be approximately the same as that of the leg in which the gross error consists
• All the above
• To locate a gross error in bearing that may exist in controlled theodolite traverse, we may plot the traverse from each end. The traverse station having the same coordinates by each route is the one where the error lies
• To locate a gross error in bearing, in a controlled traverse, we plot the traverse and the station through which perpendicular to sector of the closing line passes is the station at which the error was made

##### Pick up the correct statement from the following:

Options are :

• The lens nearer the object to be viewed is convex and is called objective
• The principal axes of both the lenses coincide the optical axis of the telescope
• All the above
• The lens nearer the eye is called eyepiece
• A refracting telescope consists optically of two lenses

##### Diaphragm of a surveying telescope is held inside:

Options are :

• Telescope at its end nearer the objective
• Objective
• Telescope at the end nearer the eye-piece
• Telescope tube at its mid point
• Eye-piece

Answer :Telescope at the end nearer the eye-piece

Options are :

• 21° 45'
• 21° 45' W
• 42° 15' W
• 42° 15'

##### Pick up the correct statement from the following:

Options are :

• All the above
• Spherical aberration may be minimised by replacing the single lens by a combination of the lenses
• In eyepieces, two plano-convex lenses placed at a certain distance apart are used
• In telescope objectives, a combination of convex lens and concave lens is used
• Spherical aberration may be reduced by diminishing the aperture

##### In chain surveying, perpendiculars to the chain line, are set out by:

Options are :

• An optical square
• A theodolite
• A level
• A prismatic compass

Options are :

• 60°
• 30°
• 45°
• 90°

Options are :

• - 0.12 m
• - 1.87 m
• - 0.11 m
• - 0.137 m

Options are :

• 3.70 m
• 1.70 m
• 0.70 m
• 4.70 m
• 2.70 m

##### A dumpy level was set up at mid-point between pegs A and B, 80 m apart and the staff readings were 1.32 and 1.56. When the level was set up at a point 10 m from A on BA produced, the staff readings obtained at A and B were 1.11 and 1.39The correct staff reading from this set up at S should be:

Options are :

• 1.435
• 1.345
• 1.425
• None of these

Options are :

• Tacheometer
• Clinometer

##### The staff intercept will be:

Options are :

• Greater farther off the staff is held
• Smaller, farther off the staff is held
• Same, wherever the staff is held
• Smaller, nearer the staff is held

Answer :Smaller, farther off the staff is held

##### The first reading from a level station is:

Options are :

• Foresight
• Intermediate sight
• Back-sight
• Any sight

Options are :

• ± 1 ?k mm
• ± 5 ?k mm
• ± 0.5 ?k mm
• ± 2 ?k mm
• ± 0.1 ?k mm

##### Pick up the correct statement from the following:

Options are :

• Accidental errors occur inspite of every precaution is taken
• Systematic errors persist and have regular effects in the survey performances
• All the above
• Mistakes arise from inattention, inexperience or carelessness

##### The boundary of water of a still lake, represents:

Options are :

• Horizontal surface
• Level surface
• Contour line
• A concave surface

##### An imaginary line lying throughout on the surface of the earth and preserving a constant inclination to the horizontal, is called:

Options are :

• Level line
• Line of gentle scope
• Contour line

##### The area of any irregular figure of the plotted map is measured with:

Options are :

• Sextant
• Optical square
• Clinometer
• Pentagraph
• Planimeter