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This set of Surveying Multiple Choice Questions & Answers (MCQs) focuses on Surveying Set 18

Q1 | Chain surveying consists of the arrangement of framework of triangles because a triangle is the only simple plane figure which can be plotted uniquely if

- three sides
- three angles
- one side and two angles
- one angle and two sides

Q2 | The curvature of the earth is taken into consideration if the limit of survey is

- 50 to 100 km2
- 100 to 200 km2
- 200 to 250 km2
- more than 250 km2

Q3 | The horizontal distance between any two consecutive contours is called

- vertical equivalent
- horizontal equivalent
- contour interval
- contour gradient

Q4 | When the effect of refraction is taken into account in levelling, the true staff reading is obtained by subtracting the correction for refraction from the observed staff reading.

- Right
- Wrong

Q5 | A vertical line at any point is a line normal to the level surface at the point.

- Yes
- No

Q6 | A stadia telescope, in a tacheometer, is fitted with

- two additional vretical hairs
- two additional horizontal hairs
- all of these

Q7 | In route surveys, the most suitable method of contouring is

- by squares
- by radial lines
- by cross-sections
- by tacheometer

Q8 | Which of the following statement is wrong?

- The magnetic meridian coincides with the true meridian at all the places
- The magnetic meridian does not vary from place to place on the earth's surface.
- The magnetic declination at a place is constant.
- all of the above

Q9 | The direct angles may have any value between

- 0? and 90?
- 0? and 120?
- 0? and 180?
- 0? and 360?

Q10 | When the length of a chord is less than the peg interval, it is known as

- small chord
- short chord
- sub-chord
- normal chord

Q11 | The fundamental requirement of the spiral curve is that its radius of curvature at any point shall vary inversely as the distance from the beginning of the curve.

- Agree
- Disagree

Q12 | The deflection angle may be directly obtained by setting the instrument to read

- 0?
- 90?
- 180?
- 270?

Q13 | If x is the smallest division on the main scale and n are the number of divisions on the vernier, then the least count of the vernier is

- x + n
- x - n
- x x n
- x ? n

Q14 | A line joining some fixed points on the main survey lines, is called a

- check line
- tie line
- base line
- none of these

Q15 | The degree of the curve is the angle subtended by a chord of

- 15 m
- 20 m
- 25 m
- 30 m

Q16 | The length of peg interval for flat curves is

- 15 m
- 20 m
- 25 m
- 30 m

Q17 | A staff reading taken on a point whose elevation is to be determined as on a change point is called.

- fore sight reading
- back sight reading
- intermediate sight
- none of these

Q18 | When the position of a point is to be located accurately by a perpendicular offset, the direction of perpendicular is set out by means of

- theodolite
- optical square
- dumpy level
- planimeter

Q19 | The height of instrument is equal to

- reduced level of bench mark + back sight
- reduced level of bench mark + fore sight
- reduced level of bench mark + intermediate sight
- back sight + fore sight

Q20 | The tachemometric method of contouring is particularly suitable

- when a contoured map of hill is required
- when the area is not very extensive
- in surveys of roads or railways
- all of these

Q21 | The method of surveying in which field work and plotting work are done simultaneously, is called

- compass surveying
- levelling
- plane tabling
- chain surveying

Q22 | The operation of turning the table so that all the lines on the paper are parallel to the corresponding lines on the ground, is called

- levelling
- centering
- setting
- orientation

Q23 | A line joining the apex of a triangle to some fixed point on the opposite side is called a

- check line
- tie line
- base line
- none of these

Q24 | Which of the following statement is correct?

- The error in measured length due to bad ranging is compensating error.
- If the chain used in measuring a distance is too short, the error is positive error.
- The error in measured length due to careless holding of chain is cumulative error.
- When the pull applied while measuring with a tape, is more than the standard pull for that tape, the error in measured length is positive.

Q25 | The contour lines can cross one another on map only in the case of

- a vertical cliff
- a valley
- a ridge
- an overhanging cliff