Showing posts with label Surveying Questions. Show all posts

Surveying Questions (S6)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Method of repetition can eliminate error due to ...
1. inadjustments of line of collimation and the trunnion axis
2. inaccurate graduations
3. inaccurate bisection of the object
4. all of the above
View Answer

Answer: d

If the included angle is $\alpha$, the angle of deflection is ...
1. $360^\circ - \alpha$
2. $180^\circ - \alpha$
3. $180^\circ + \alpha$
4. $90^\circ + \alpha$
View Answer

Answer: b

Which of the following is incorrect regarding a theodolite?
1. The horizontal axis must be perpendicular to the vertical axis
2. The axis of the altitude level must be perpendicular to the line of collimation
3. The axis of the plate must lie in a plane perpendicular to the vertical axis
4. The line of collimation must be perpendicular to the horizontal axis at its intersection with the vertical axis
View Answer

Answer: b
The axis of the altitude level must be parallel to the line of collimation.
If this condition exists, the vertical angles will be free from index error due to lack of parallelism.

Error due to the line of collimation not being perpendicular to the horizontal axis can be eliminated by ...
1. by taking both face readings
2. by taking the mean of both vernier readings
3. by taking the mean of several readings distributed over different portions of the graduated circle
4. none of the above
View Answer

Answer: a

Error due to an eccentricity of verniers can be eliminated by ...
1. by taking both face readings
2. by taking the mean of both vernier readings
3. by taking the mean of several readings distributed over different portions of the graduated circle
4. none of the above
View Answer

Answer: b

Error due to parallax can be eliminated by...
1. focusing the objective
2. focusing the eye-piece
3. focusing the objective and eyepiece
4. none of the above
View Answer

Answer: c

In a free needle method of traversing, the direction of the magnetic meridian is established at ...
1. at the first station
2. at the last station
3. at every alternate station
4. at all stations
View Answer

Answer: d

In a closed traverse, the algebraic sum of deflection angles is ...
1. $360^\circ$
2. $270^\circ$
3. $180^\circ$
4. $90^\circ$
View Answer

Answer: a

The latitude of a line of length $l$ and bearing $\theta$ is given by ...
1. $l+cos \theta$
2. $l-cos \theta$
3. $l+sin \theta$
4. $l-sin \theta$
View Answer

Answer: a

In a closed traverse, the sum of north latitudes exceeds the sum of south latitudes and the sum of east departures exceeds the sum of west departures. The closing line will lie in the ...
1. N-W quadrant
2. S-E quadrant
3. N-E quardant
4. S-W quardant
View Answer

Answer: c

In a closed traverse, the algebraic sum of latitudes and departures should be ...
1. zero
2. greater than zero
3. zero and positive value respectively
4. positive value and zero respectively
View Answer

Answer: a

The error of closer is ...
1. $p/e$
2. $e/p$
3. $e+p$
4. $e-p$
Where $e$ is the error of closure and $p$ perimeter of the traverse
View Answer

Answer: b

In Bowditch's method, linear measurements and angular measurements are proportional to ...
1. $1/ \sqrt{l}$ and $l$
2. $\sqrt{l}$ and $\sqrt{l}$
3. $1/ \sqrt{l}$ and $1/ \sqrt{l}$
4. $\sqrt{l}$ and $1/ \sqrt{l}$
View Answer

Answer: d

When linear and angular measurements are measured with equal precision then ...
1. compass rule is used
2. transit rule is used
3. axis method is used
4. any of the above
View Answer

Answer: a
Bowditch's rule is also known as compass rule.

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Surveying Questions (S5)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Where "0" is engraved in a Prismatic Compass?
1. North
2. South
3. East
4. West
View Answer

Answer: b

Which of the following is correct regarding Prismatic Compass?
1. East and West are interchanged
2. The reading is taken through the top of the glass
3. Sighting and reading taking can be done simultaneously
4. The Graduated Card is attached to the box
View Answer

Answer: c
Except for option (c) all the options are correct for a Surveyor's Compass.

A line drawn through points of same magnetic declination is called _____.
1. Isogonic
2. Agonic
3. Isobar
4. None of the above
View Answer

Answer: a
Agonic lines show points of zero Magnetic declination and Isobar shows points of same pressure.

Which of the following statement is correct about Diurnal Variation?
1. It is less at the Equator
2. Considerably more in summer
3. More in days
4. All of the above
View Answer

Answer: d

The advantage of True Bearing over Magnetic Bearing is ...
1. It does not vary with time
2. It is easier to take
3. Local Attraction has no effect on it
4. Both (a) and (c)
View Answer

Answer: d

The Magnetic bearing of a line is $48^\circ 24'$. What will be the true bearing if the magnetic declination is $5^\circ 38' E$?
1. $42^\circ 46'$
2. $54^\circ 2'$
3. $53^\circ 38'$
4. $42^\circ 24'$
View Answer

Answer: b
Since the declination is on East, TB = MB + Decliation

What is the Magnetic declination at a place if the magnetic bearing of the sun at noon is $350^\circ 20'$.
1. $9^\circ 40' E$
2. $9^\circ 40' W$
3. $10^\circ 20' E$
4. $10^\circ 20' W$
View Answer

Answer: a
Since the magnetic bearing of the sun is $350^\circ 20'$, it is at the North of the place and hence the True bearing of the sun, which is on the meridian, will be $360^\circ$.
Therefore, $TB=MB+Declination$
$Declination = 360^\circ - 350^\circ 20' = 9^\circ 40' E$

Select the incorrect statement.
1. Wires carrying electric current can cause Local Attraction
2. If the difference between FB and BB of a line is not $180^\circ$, it may be due to Local Attraction.
3. Local Attraction has no effect on True Bearing.
4. None of the above
View Answer

Answer: d

The following Bearing was observed while traversing with a compass

Line	FB	BB
AB	$124^\circ 30'$	$304^\circ 30'$
BC	$68^\circ 15'$	$246^\circ$
CD	$310^\circ 30'$	$135^\circ 15'$
DA	$200^\circ 15'$	$17^\circ 45'$

Which stations had affected by local attration?

Station A and B

Station A and C

Station C and D

Station B, C and D

View Answer

Answer: c
FB and BB of line AB differ by $180^\circ$, Therefore Stations A and B are free from Local Attraction.

What is Trunnion axis?
1. Horizontal axis of Theodolite
2. Vertical axis of Theodolite
3. Axis of Line of sight of Theodolite
4. Axis of Bubble tube
View Answer

Answer: a

Select the incorrect Statement.
1. A transit theodolite can be rotated $180^\circ$ in its vertical plane
2. When the bubble of the telescope is up, Telescope is said to be direct.
3. If the vertical circle is to the left of the observer, the observation is called face left observation.
4. The vertical axis is the axis about which vertical circle rotates.
View Answer

Answer: d
The vertical axis is the axis about which the instrument rotates.

Which of the following is used to test the horizontality of the trunnion axis?
1. Plate Level
2. Compass
3. Striding Level
4. Index Frame
View Answer

Answer: c

The inner spindle carries the _______.
1. Upper Plate
2. Lower Plate
3. Scale Plate
4. Vertical Circle
View Answer

Answer: a
The inner spindle carries the upper plate and outer spindle carries the lower plate.

If a relative motion between the vernier and the scale is desired, which of the following is adopted?
1. Clamp both lower and upper plate
2. Clamp lower plate only
3. Clamp upper plate only
4. Unclamp both plates
View Answer

Answer: b
If the lower clamp is clamped and upper clamp is unclamped, the upper plate and the instrument can rotate on the inner axis with a relative motion between the vernier and the scale.

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Surveying Questions (S4)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Arrange the following field works in a working order.
1. Marking and fixing survey stations
2. Reconnaissance
3. Running survey lines
1. (i) (ii) (iii)
2. (ii) (i) (iii)
3. (iii) (i) (ii)
4. (iii) (ii) (i)
View Answer

Answer: b

Which of the following instruments is used to set out both $45^\circ$ and $90^\circ$ angles?
1. Open Cross Staff
2. French Cross Staff
3. Optical Square
4. Prism Square
View Answer

Answer: b
Open cross-staff, Optical square and Prism square can be used to set only $45^\circ$ angle.

Which of the following obstacle to chaining but not ranging?
1. A building
2. A river
3. A pond
4. Both (b) and (c)
View Answer

Answer: d
A building is an obstacle to both chaining and ranging.

What the following symbol represents?
1. Sand Pit
2. Rocks
3. Pond
4. None of the above
View Answer

Answer: a

If the reduced bearing of a line is $N 32^\circ W$, what will be its whole circle bearing?
1. $32^\circ$
2. $212^\circ$
3. $328^\circ$
4. $N328^\circ W$
View Answer

Answer: c
Since the Quadrant is NW, WCB = 360 - RB = 360 - 32 = 328

What is the difference between the Fore bearing and Back bearing?
1. $360^\circ$
2. $180^\circ$
3. $90^\circ$
4. $45^\circ$
View Answer

Answer: b
The fore bearing and back bearing differ exactly by $180^\circ$

If the fore bearing of a Line AB is $197^\circ$, What will be the back bearing of BA?
1. $17^\circ$
2. $180^\circ$
3. $197^\circ$
4. Can not be determined
View Answer

Answer: c
If we go from A to B then the fore bearing of line AB is $197^\circ$, but if we go from B to A then the fore bearing of BA will be $17^\circ$ and since the difference between FB and BB is always $180^\circ$, the BB of BA will be $197^\circ$

What will be the internal angle ABC, if the fore bearing of AB is $21^\circ$ and that of BC is $109^\circ$?
1. $111^\circ$
2. $130^\circ$
3. $87^\circ$
4. $92^\circ$
View Answer

Answer: d

What will be the back bearing of $S 68^\circ 2' W$?
1. $N 68^\circ 2' E$
2. $ 68^\circ 2' $
3. $248^\circ 2'$
4. $S 68^\circ 2' E$
View Answer

Answer: a

What is the sum of the internal angles of a polygon of 'n' sides?
1. $(n-4)90^\circ$
2. $(2n-4)90^\circ$
3. $(n+4)90^\circ$
4. $(2n+4)90^\circ$
View Answer

Answer: b

Select the incorrect statement.
1. The needle used in a compass should be straight and symmetrical.
2. The needle should be sensitive
3. The CG of the needle should be as near the pivot as possible
4. The needle is the only magnetic material in a compass
View Answer

Answer: c
For stability, the CG of the needle should be as far below the pivot as possible.

The angle which magnetic lines of force make with the surface of the earth is called ___.
1. Dip
2. Magnetic Declination
3. Magnetic Bearing
4. None of the above
View Answer

Answer: a

What is the angle of Dip at the Equator?
1. $180^\circ$
2. $90^\circ$
3. Zero
4. Always varies
View Answer

Answer: c
It is $90^\circ$ at the magnetic poles

Which of the following compass has "Edge bar" type needle?
1. Prismatic Compass
2. Surveyor's Compass
3. Wild B3 Precision Compass
4. All of the above
View Answer

Answer: b

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Surveying Questions (S3)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

The true length of a chain is known to be 500 m. The line was again measured with a 20 m tape and found to be 502 m. What is the correct length of the 20 m tape?
1. 19.92 m
2. 20.80 m
3. 20.36 m
4. 19.86 m
View Answer

Answer: a
Since the true length (TL) is 500 m and Measured Length (ML) is 502 m. The correction required for the tape is negative.
Number of 20 m tapes required to measure 500 m = 500/20 = 25
That means the extra 2 m is accumulated in 25 settings of 20 m tape
Therefore, Extra Length measured during each setting = 20/25 = 0.08 m

The correct Length of 20 m tape = 20 - 0.08 = 19.92 m

Or one can use the following formula

$TL=ML\frac{\text{Correct Length of Tape}}{\text{Original length of Tape}}$

The length of a line measured with a 20 m chain was found to be 250 m. What is the true length of the line if the chain was 10 cm too long?
1. 248.75 m
2. 250.25 m
3. 251.25 m
4. 252.75 m
View Answer

Answer: c
Since the chain is too long correction must be positive
Number of chain settings = 250/20 = 12.5
Therefore, corection = 12.5 * 10 cm = 125 cm
Correct Length of line = 250+1.25 = 251.25 m

Or,
$TL=ML\frac{\text{Correct Length of Chain}}{\text{Original length of Chain}}$
$TL=250\frac{\text{20.1}}{\text{20}}$
TL = 251.25 m

Select the incorrect statement.
1. Correction for temperature is either positive or correction.
2. Correction for the pull is either positive or negative
3. Correction for sag is either positive or negative
4. none of the above
View Answer

Answer: c
Correction for sag is always negative.

Correction for sag is calculated from ...
1. ${C}_{s}=\frac{L \times (w\times L)^2}{24\times P^2}$
2. ${C}_{s}=\frac{L^2 \times W^2}{24\times P^2}$
3. Both (a) and (b)
4. none of the above
View Answer

Answer: a
${C}_{s}=\frac{L \times (w\times L)^2}{24\times P^2}$
Or,
${C}_{s}=\frac{L \times W^2}{24\times P^2}$

The pull that equalises the correction due to pull and correction due to sag is called ____.
1. Equalising Pull
2. Normal Tension
3. Normalizing Pull
4. Normal Force
View Answer

Answer: b

Correction for slope is given by ...
1. ${C}_{s}=L(1-\cos\theta)$
2. ${C}_{s}=2L \times \sin^2 \frac{\theta}{2}$
3. Both (a) and (b)
4. None of the above
View Answer

Answer: c

Select the correct statement
1. Correction for slope is always negative
2. Correction for slope is always positive
3. Correction for slope is either positive or negative
4. None of the above
View Answer

Answer: a
The distance measured along the slope is always greater than the horizontal distance and hence the correction is always NEGATIVE.

Correction for bad ranging is given by ...
1. ${C}_{h}=\frac{d^3}{3L}$
2. ${C}_{h}=\frac{d^2}{4L}$
3. ${C}_{h}=\frac{d^3}{2L}$
4. ${C}_{h}=\frac{d^2}{2L}$
View Answer

Answer: d

What will be the total error after calculating various errors?
1. It will be the summation of magnitudes all the errors
2. It will be the average of all the errors
3. It will be the algebraic sum of all the errors
4. All are correct
View Answer

Answer: c

Select the correct statement.
1. Check Lines are run in the field to check the accuracy of the work
2. Tie Lines are run to take details of the nearby objects
3. Tie Line can also be used as a Check Line
4. All are correct
View Answer

Answer: d

What is the least angle of a well-conditioned triangle?
1. $20^\circ$
2. $30^\circ$
3. $25^\circ$
4. $40^\circ$
View Answer

Answer: b

Which of the following statement is true regarding offsets?
1. They are Perpendicular to the chain line
2. They are not perpendicular to the chain line
3. They are always perpendicular to the chain line
4. They are either perpendicular or oblique to the chain line.
View Answer

Answer: d

An offset is laid $3^\circ$ from its true direction on the field. If the scale of plotting is 20 m to 1 cm, find the maximum length of the offset so that the displacement of the point on the paper may not exceed 0.25 mm.
$\sin 3^\circ = 0.0523$; $\cos 3^\circ = 0.9986$
1. 9.5 m
2. 0.5 m
3. 41.86 m
4. 3.9 m
View Answer

Answer: a
Displacemet of the point on the paper$=\frac{l\times \sin 3^\circ}{20}=0.025 \text{ cm}$
$l=9.5 m$

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Surveying Questions (S2)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Which of the following is an instrumental error?
1. Error due to magnetic declination
2. Error due to inaccurate reading of the instrument
3. An error caused due to wind
4. none of the above
View Answer

Answer: d
The instrumental error arises due to imperfect or faulty adjustment of the instrument.
Option (a) & (c) = Natural Error
Option (b) = Personal Error.

In a 30 m chain, tallies are provided at every _____.
1. 2 m
2. 5 m
3. 6 m
4. 3 m
View Answer

Answer: b
In 20 m and 30 m chains, tallies are provided at every 5 m.

How many links are there in a 30 m chain?
1. 80
2. 100
3. 150
4. 200
View Answer

Answer: c

What is the exact length of a Link?
1. 161 mm
2. 171 mm
3. 180 mm
4. 200 mm
View Answer

Answer: a
As per IS: 1492, Exact length of a Link is 161±1 mm.

What is the length of Gunter's Chain?
1. 20 ft
2. 33 ft
3. 66 ft
4. 100 ft
View Answer

Answer: c
A Gunter's Chain is 66 ft long and consists of 100 links

What is the difference between the length of Engineer's Chain and Revenue Chain?
1. 33 ft
2. 66 ft
3. 25 ft
4. 50 ft
View Answer

Answer: b
Length of Engineer's chain = 100 ft; Length of Revenue chain = 33 ft.

Tolerance limit on length for 10 m and 30 m are respectively ...
1. ±3 mm and ±5 mm
2. ±5 mm and ±8 mm
3. ±8 mm and ±5 mm
4. ±3 mm and ±8 mm
View Answer

Answer: d
As per IS: 1492, Tolerance Limit for 5 m and 10 m chains are ±3 mm, for 20 m chain ±5 mm and for 30 m chain ±8 mm.

Inver Tape is made of an alloy of ...
1. Nickel and Steel
2. Copper and Zinc
3. Copper and Tin
4. Nickel and Chromium
View Answer

Answer: a
Inver tape is made of an alloy of Nickel (36 %) and Steel.

When very high precision is required, which of the following tape is used?
1. Metallic Tape
2. Steel Tape
3. Inver Tape
4. Linen Tape
View Answer

Answer: c

What is the length of the colour bands in a ranging rod?
1. 100 mm
2. 200 mm
3. 300 mm
4. 500 mm
View Answer

Answer: b

Select the incorrect statement.
1. Direct ranging is done when the two ends of the chain line are intervisible.
2. Indirect ranging is done when the two ends of the chain line are not intervisible
3. A line ranger consists of either two plane mirrors or one right-angled isosceles prism
4. Indirect ranging is done by selecting two intermediate points
View Answer

Answer: c
A line ranger consists of either two plane mirrors or TWO right-angled isosceles prisms.

After chaining, if the leader has 4 arrows and the follower has 3, then the length of the chain line is?
1. 7 chains
2. 1 chain
3. 3 chains
4. 4 chains
View Answer

Answer: c

Error due to the incorrect counting of tape length is termed as ...
1. Systematic error
2. Mistake
3. Compensating error
4. Blunder
View Answer

Answer: d

Error due to sag is ...
1. Positive
2. Negative
3. Cumulative
4. Both (a) and (c)
5. Both (b) and (c)
View Answer

Answer: d
When the chain is stretched above the ground due to undulations or irregular ground, the chain sags and takes the form of a catenary. The measured distance, therefore, is more than the actual distance and hence the error is positive and cumulative.

Abney Clinometer is used to ...
1. measure vertical angle
2. measure slope of the ground
3. trace grade contour
4. All of the above
View Answer

Answer: d

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Surveying Questions (S1)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Which of the following is used when the work is of national importance?
1. Plane surveying
2. Geodetic surveying
3. Cadastral surveying
4. none of the above
View Answer

Answer: b
In geodetic surveying, the curvature of the Earth is taken into account due to which accuracy of work increases.

Plane surveying is used when the area to be surveyed is less than ______ sq km.
1. 155
2. 195
3. 225
4. 250
View Answer

Answer: d

When natural features of a country is to be surveyed then which of the following surveys is done?
1. Topographical Survey
2. Cadastral Survey
3. City Survey
4. Marine Survey
View Answer

Answer: a

Which of the following surveys is used to fix the boundaries of municipalities?
1. Topographical Survey
2. Cadastral Survey
3. City Survey
4. Marine Survey
View Answer

Answer: b
Cadastral surveys are used to fix property lines, the calculation of land area and to fix land boundaries of municipalities and of state and federal jurisdictions.

Which of the following surveys is used to determine the absolute location of any point?
1. Topographical Surveys
2. Cadastral Surveys
3. Astronomical Surveys
4. Astrological Surveys
View Answer

Answer: c

Which of the following surveys needs the least work on the field?
1. Chain Survey
2. Plane Table Survey
3. Traverse Survey
4. Triangulation Survey
View Answer

Answer: a

Consider the following statements and choose the correct answer.
1. The relative positions of the points to be surveyed should be located by measurement from at least two points of reference, the positions of which may not be fixed in advance.
2. The work of surveying should be done from whole to part.
1. Only (i) is correct
2. Both (i) and (ii) are correct
3. (i) is wrong and (ii) is correct
4. (i) is correct and (ii) is wrong
View Answer

Answer: c
The above two statements are principles of surveying:
The relative positions of the points to be surveyed should be located by measurement from at least two points of reference, the positions of which have already been fixed.
The work of surveying should be done from whole to part.

The principle of surveying "whole to part" is used to ...
1. prevent the accumulation of errors
2. localise minor errors
3. Both (a) and (b)
4. None of the above
View Answer

Answer: c

Which of the following is the largest scale?
1. 1 cm = 10 m
2. 1/500
3. 10 cm = 10 m
4. 1/1000
View Answer

Answer: c
(a)1 cm = 10 cm ⇒ RF = 1/1000
(b)1/500
(c)10 cm = 10 m ⇒ 10 cm = 1000 cm ⇒ RF = 1/100
(d)1/1000
Therefore, the largest scale is 10 cm = 10 m

Select the correct statement.
1. If the RF is less, the map would be detailed but difficult to create
2. If the RF is more, the map would be detailed but difficult to create
3. If the RF is more, the map would not be detailed and easy to create
4. none of the above
View Answer

Answer: b
When the RF is more, the scale will be large and hence more details can be shown on the maps which will increase the work.

How many plain scales IS: 1491:1959 has recommended?
1. 4
2. 5
3. 6
4. 7
View Answer

Answer: c

Select the correct statement.
1. (n+1) divisions of the main scale = n divisions of the direct vernier
2. n divisions of the main scale = (n-1) divisions of the retrograde vernier
3. (n+1) divisions of the main scale = n divisions of the retrograde vernier
4. n divisions of the main scale = (n-1) divisions of the direct vernier
View Answer

Answer: c
In Direct Vernier, (n-1) divisions of the main scale = n divisions of the vernier
In Retrograde Vernier, (n+1) divisions of the main scale = n divisions of the vernier

In an Extended Vernier ...
1. (n-2) divisions of the main scale = n divisions of the vernier
2. (n+2) divisions of the main scale = n divisions of the vernier
3. (2n+2) divisions of the main scale = n divisions of the vernier
4. (2n-2) divisions of the main scale = n divisions of the vernier
View Answer

Answer: d

A limb of an instrument is divided into 15 minutes. What will be the suitable number of divisions in vernier to read to 20 seconds?
1. 35
2. 65
3. 40
4. 45
View Answer

Answer: d
$\text{Least Count}=\frac{s}{n}$
$\text{Least Count} = 20"$ ; $s=15'$
$20"=\frac{15\times 60}{n}$
$n=45$

A surveyor measured the distance between two points on the plan drawn to a scale of 1 cm = 20 m and the result was 936 m. Later, however, he discovered that he used a scale of 1 cm = 40 m. What is the true distance between the points?
1. 468 m
2. 468 cm
3. 936 cm
4. 468 km
View Answer

Answer: a
RF of correct scale $=1/2000$
RF of the wrong scale $=1/4000$
As the RF of the wrong scale is half of that of correct scale, the true length will be half of the measured length i.e., 468 m

$\text{Correct Length}=\frac{\text{RF of wrong scale}}{\text{RF of correct scale}}\times \text{measured Length}$

$\text{Correct Length}=\frac{1/4000}{1/2000}\times936 = 468 m$

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Pages

Surveying Questions (S6)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Method of repetition can eliminate error due to ...

inadjustments of line of collimation and the trunnion axis inaccurate graduations inaccurate bisection of the object all of the above

If the included angle is $\alpha$, the angle of deflection is ...

$360^\circ - \alpha$ $180^\circ - \alpha$ $180^\circ + \alpha$ $90^\circ + \alpha$

Which of the following is incorrect regarding a theodolite?

Error due to the line of collimation not being perpendicular to the horizontal axis can be eliminated by ...

by taking both face readings by taking the mean of both vernier readings by taking the mean of several readings distributed over different portions of the graduated circle none of the above

Error due to an eccentricity of verniers can be eliminated by ...

by taking both face readings by taking the mean of both vernier readings by taking the mean of several readings distributed over different portions of the graduated circle none of the above

Error due to parallax can be eliminated by...

focusing the objective focusing the eye-piece focusing the objective and eyepiece none of the above

In a free needle method of traversing, the direction of the magnetic meridian is established at ...

at the first station at the last station at every alternate station at all stations

In a closed traverse, the algebraic sum of deflection angles is ...

$360^\circ$ $270^\circ$ $180^\circ$ $90^\circ$

The latitude of a line of length $l$ and bearing $\theta$ is given by ...

$l+cos \theta$ $l-cos \theta$ $l+sin \theta$ $l-sin \theta$

In a closed traverse, the sum of north latitudes exceeds the sum of south latitudes and the sum of east departures exceeds the sum of west departures. The closing line will lie in the ...

N-W quadrant S-E quadrant N-E quardant S-W quardant

In a closed traverse, the algebraic sum of latitudes and departures should be ...

zero greater than zero zero and positive value respectively positive value and zero respectively

The error of closer is ...

$p/e$ $e/p$ $e+p$ $e-p$ Where $e$ is the error of closure and $p$ perimeter of the traverse

In Bowditch's method, linear measurements and angular measurements are proportional to ...

$1/ \sqrt{l}$ and $l$ $\sqrt{l}$ and $\sqrt{l}$ $1/ \sqrt{l}$ and $1/ \sqrt{l}$ $\sqrt{l}$ and $1/ \sqrt{l}$

When linear and angular measurements are measured with equal precision then ...

compass rule is used transit rule is used axis method is used any of the above

Surveying Questions (S5)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Where "0" is engraved in a Prismatic Compass?

North South East West

Which of the following is correct regarding Prismatic Compass?

East and West are interchanged The reading is taken through the top of the glass Sighting and reading taking can be done simultaneously The Graduated Card is attached to the box

A line drawn through points of same magnetic declination is called _____.

Isogonic Agonic Isobar None of the above

Which of the following statement is correct about Diurnal Variation?

It is less at the Equator Considerably more in summer More in days All of the above

The advantage of True Bearing over Magnetic Bearing is ...

It does not vary with time It is easier to take Local Attraction has no effect on it Both (a) and (c)

The Magnetic bearing of a line is $48^\circ 24'$. What will be the true bearing if the magnetic declination is $5^\circ 38' E$?

$42^\circ 46'$ $54^\circ 2'$ $53^\circ 38'$ $42^\circ 24'$

What is the Magnetic declination at a place if the magnetic bearing of the sun at noon is $350^\circ 20'$.

$9^\circ 40' E$ $9^\circ 40' W$ $10^\circ 20' E$ $10^\circ 20' W$

Select the incorrect statement.

Wires carrying electric current can cause Local Attraction If the difference between FB and BB of a line is not $180^\circ$, it may be due to Local Attraction. Local Attraction has no effect on True Bearing. None of the above

The following Bearing was observed while traversing with a compass

Which stations had affected by local attration?

Station A and B Station A and C Station C and D Station B, C and D

What is Trunnion axis?

Horizontal axis of Theodolite Vertical axis of Theodolite Axis of Line of sight of Theodolite Axis of Bubble tube

Select the incorrect Statement.

Which of the following is used to test the horizontality of the trunnion axis?

Plate Level Compass Striding Level Index Frame

The inner spindle carries the _______.

Upper Plate Lower Plate Scale Plate Vertical Circle

If a relative motion between the vernier and the scale is desired, which of the following is adopted?

Clamp both lower and upper plate Clamp lower plate only Clamp upper plate only Unclamp both plates

Surveying Questions (S4)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.

Arrange the following field works in a working order.

Marking and fixing survey stations Reconnaissance Running survey lines (i) (ii) (iii) (ii) (i) (iii) (iii) (i) (ii) (iii) (ii) (i)

Which of the following instruments is used to set out both $45^\circ$ and $90^\circ$ angles?

Open Cross Staff French Cross Staff Optical Square Prism Square

Which of the following obstacle to chaining but not ranging?

A building A river A pond Both (b) and (c)

What the following symbol represents?

Sand Pit Rocks Pond None of the above

If the reduced bearing of a line is $N 32^\circ W$, what will be its whole circle bearing?

$32^\circ$ $212^\circ$ $328^\circ$ $N328^\circ W$

What is the difference between the Fore bearing and Back bearing?

$360^\circ$ $180^\circ$ $90^\circ$ $45^\circ$

If the fore bearing of a Line AB is $197^\circ$, What will be the back bearing of BA?

$17^\circ$ $180^\circ$ $197^\circ$ Can not be determined

What will be the internal angle ABC, if the fore bearing of AB is $21^\circ$ and that of BC is $109^\circ$?

$111^\circ$ $130^\circ$ $87^\circ$ $92^\circ$

What will be the back bearing of $S 68^\circ 2' W$?

$N 68^\circ 2' E$ $ 68^\circ 2' $ $248^\circ 2'$ $S 68^\circ 2' E$

inadjustments of line of collimation and the trunnion axis

inaccurate graduations

inaccurate bisection of the object

all of the above

$360^\circ - \alpha$

$180^\circ - \alpha$

$180^\circ + \alpha$

$90^\circ + \alpha$

by taking both face readings

by taking the mean of both vernier readings

by taking the mean of several readings distributed over different portions of the graduated circle

none of the above

by taking both face readings

by taking the mean of both vernier readings

by taking the mean of several readings distributed over different portions of the graduated circle

none of the above

focusing the objective

focusing the eye-piece

focusing the objective and eyepiece

none of the above

at the first station

at the last station

at every alternate station

at all stations

$360^\circ$

$270^\circ$

$180^\circ$

$90^\circ$

$l+cos \theta$

$l-cos \theta$

$l+sin \theta$

$l-sin \theta$

N-W quadrant

S-E quadrant

N-E quardant

S-W quardant

zero

greater than zero

zero and positive value respectively

positive value and zero respectively

$p/e$

$e/p$

$e+p$

$e-p$

Where $e$ is the error of closure and $p$ perimeter of the traverse

$1/ \sqrt{l}$ and $l$

$\sqrt{l}$ and $\sqrt{l}$

$1/ \sqrt{l}$ and $1/ \sqrt{l}$

$\sqrt{l}$ and $1/ \sqrt{l}$

compass rule is used

transit rule is used

axis method is used

any of the above

North

South

East

West

East and West are interchanged

The reading is taken through the top of the glass

Sighting and reading taking can be done simultaneously

The Graduated Card is attached to the box

Isogonic

Agonic

Isobar

None of the above

It is less at the Equator

Considerably more in summer

More in days

All of the above

It does not vary with time

It is easier to take

Local Attraction has no effect on it

Both (a) and (c)

$42^\circ 46'$

$54^\circ 2'$

$53^\circ 38'$

$42^\circ 24'$

$9^\circ 40' E$

$9^\circ 40' W$

$10^\circ 20' E$

$10^\circ 20' W$

Wires carrying electric current can cause Local Attraction

If the difference between FB and BB of a line is not $180^\circ$, it may be due to Local Attraction.

Local Attraction has no effect on True Bearing.

None of the above

Station A and B

Station A and C

Station C and D

Station B, C and D

Horizontal axis of Theodolite

Vertical axis of Theodolite

Axis of Line of sight of Theodolite

Axis of Bubble tube

Plate Level

Compass

Striding Level

Index Frame

Upper Plate

Lower Plate

Scale Plate

Vertical Circle

Clamp both lower and upper plate

Clamp lower plate only

Clamp upper plate only

Unclamp both plates

Marking and fixing survey stations

Reconnaissance

Running survey lines

(i) (ii) (iii)

(ii) (i) (iii)

(iii) (i) (ii)

(iii) (ii) (i)

Open Cross Staff

French Cross Staff

Optical Square

Prism Square

A building

A river

A pond

Both (b) and (c)

Sand Pit

Rocks

Pond

None of the above

$32^\circ$

$212^\circ$

$328^\circ$

$N328^\circ W$

$360^\circ$

$180^\circ$

$90^\circ$

$45^\circ$

$17^\circ$

$180^\circ$

$197^\circ$

Can not be determined

$111^\circ$

$130^\circ$

$87^\circ$

$92^\circ$

$N 68^\circ 2' E$

$ 68^\circ 2' $

$248^\circ 2'$

$S 68^\circ 2' E$

$(n-4)90^\circ$

$(2n-4)90^\circ$

$(n+4)90^\circ$

$(2n+4)90^\circ$

The needle used in a compass should be straight and symmetrical.

The needle should be sensitive

The CG of the needle should be as near the pivot as possible

The needle is the only magnetic material in a compass

Dip

Magnetic Declination

Magnetic Bearing

None of the above

$180^\circ$

$90^\circ$

Zero

Always varies

Prismatic Compass

Surveyor's Compass

Wild B3 Precision Compass

All of the above

19.92 m

20.80 m

20.36 m

19.86 m

248.75 m

250.25 m

251.25 m

252.75 m

Correction for temperature is either positive or correction.

Correction for the pull is either positive or negative

Correction for sag is either positive or negative

none of the above

${C}_{s}=\frac{L \times (w\times L)^2}{24\times P^2}$

${C}_{s}=\frac{L^2 \times W^2}{24\times P^2}$

Both (a) and (b)

none of the above

Where $w=$ Weight of the tape per unit length
$W=$ Total weight of the tape
$L=$ Length of the tape
$P=$ Pull applied

Equalising Pull

Normal Tension

Normalizing Pull

Normal Force

${C}_{s}=L(1-\cos\theta)$

${C}_{s}=2L \times \sin^2 \frac{\theta}{2}$

Both (a) and (b)

None of the above

Correction for slope is always negative

Correction for slope is always positive

Correction for slope is either positive or negative

None of the above

${C}_{h}=\frac{d^3}{3L}$

${C}_{h}=\frac{d^2}{4L}$

${C}_{h}=\frac{d^3}{2L}$

${C}_{h}=\frac{d^2}{2L}$

It will be the summation of magnitudes all the errors

It will be the average of all the errors

It will be the algebraic sum of all the errors

All are correct

Check Lines are run in the field to check the accuracy of the work

Tie Lines are run to take details of the nearby objects

Tie Line can also be used as a Check Line

All are correct

$20^\circ$

$30^\circ$

$25^\circ$

$40^\circ$

They are Perpendicular to the chain line

They are not perpendicular to the chain line

They are always perpendicular to the chain line

They are either perpendicular or oblique to the chain line.

An offset is laid $3^\circ$ from its true direction on the field. If the scale of plotting is 20 m to 1 cm, find the maximum length of the offset so that the displacement of the point on the paper may not exceed 0.25 mm.
$\sin 3^\circ = 0.0523$; $\cos 3^\circ = 0.9986$

9.5 m

0.5 m

41.86 m

3.9 m

Error due to magnetic declination

Error due to inaccurate reading of the instrument

An error caused due to wind

none of the above

2 m

5 m

6 m

3 m

80

100

150

200

161 mm

171 mm

180 mm

200 mm

20 ft

33 ft

66 ft

100 ft

33 ft

66 ft

25 ft

50 ft

±3 mm and ±5 mm

±5 mm and ±8 mm

±8 mm and ±5 mm

±3 mm and ±8 mm

Nickel and Steel

Copper and Zinc

Copper and Tin

Nickel and Chromium

Metallic Tape

Steel Tape

Inver Tape

Linen Tape

100 mm

200 mm

300 mm

500 mm

7 chains

1 chain

3 chains

4 chains

Systematic error

Mistake

Compensating error

Blunder

Positive

Negative

Cumulative

Both (a) and (c)

Both (b) and (c)