### Surveying Set 18

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
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
• all of these
Q7 | In route surveys, the most suitable method of contouring is
• by squares
• 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.
• 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