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TNP VECTORS > Section 4 > Flashcards

Section 4 Flashcards

1
Q

The reduced bearing of a line is N 87° W. Its whole circle
bearing is
A. 87°
B. 273°
C. 93°
D. 3°

A

B. 273°

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2
Q

Surveys which are carried out to depict mountains, rivers,
water bodies, wooded areas and other cultural details, are
known as
A. cadastral surveys
B. city surveys
C. topographical surveys
D. guide map surveys
E. plane surveys

A

C. topographical surveys

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3
Q

If d is the distance between equidistant odd ordinates,
the Simpson’s rule for the areas, is
A. [h1 + hn + 2(h3 + h5 + … + hn - 2) + 4(h2 + h4 + … + hn - 1)]
B. [h1 + hn + 2(h3 + h5 + … + hn - 2) + 4(h2 + h4 + … + hn - 1)]
C. [h1 + hn x 2(h2 + h4 + … + hn - 1) + 4(h3 + h5 + … + hn - 2)]
D. [h1 + hn + 2(h3 + h5 + … + hn - 2) + 4(h2 + h4 + … + hn - 1)]
E. none of these

A

B. [h1 + hn + 2(h3 + h5 + … + hn - 2) + 4(h2 + h4 + … + hn - 1)]

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4
Q

To set out a parallel from a given inccessible point to a
given line AB, the following observations and made
Distance AB and angle PAM = a and angle PBA = b are
measured where Mis a point on the line BA produced. The
perpendicular to the desired parallel line from A and B are :

A

a. AB/cot b - cot a

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5
Q

Which of the following introduces an error of about 1 in
1000 if 20 m chain is used
A. length of chain 20 mm wrong
B. one end of the chain 0.9 m off the line
C. one end of chain 0.9 m higher than the other
D. middle of the chain 0.45 m off the line
E. all the above

A

E. all the above

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6
Q

The distance between the point of intersection of an up
grade + g1% and downgrade g2% and the highest point of
the vertical curve of length L, is

A

d. L(g1 - g2)/800

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7
Q

The total change in level along the line is equal to total
back sights
A. minus total fore sights
B. the total rises minus total falls
C. the reduced level of last point minus reduced level of the
first point
D. all the above

A

D. all the above

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8
Q

ABCD is a rectangular plot of land. If the bearing of the
side AB is 75°, the bearing of DC is
A. 75°
B. 255°
C. 105°
D. 285°

A

A. 75°

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9
Q

Grid lines are parallel to
A. magnetic meridian of the central point of the grid
B. line representing the central true meridian of the grid
C. geographical equator
D. none of these

A

B. line representing the central true meridian of the grid

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10
Q

Total latitude of a point is positive if it lies
A. north of the reference parallel
B. south of the reference parallel
C. east of the reference parallel
D. west of the reference parallel

A

A. north of the reference parallel

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11
Q

In levelling operation,
A. The first sight on any change point is a back sight
B. The second sight on any change point is a fore sight
C. The line commences with a fore sight and closes with a
back sight
D. The line commences with a back sight and closes with a
foresight

A

D. The line commences with a back sight and closes with a
foresight

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12
Q

The apparent error on reversal is
A. equal to the actual error
B. twice the actual error
C. thrice the actual error
D. none of these

A

B. twice the actual error

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13
Q

Magnetic declination at any place
A. remains constant
B. does not remain constant
C. fluctuates
D. changes abruptly

A

B. does not remain constant

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14
Q
  1. Systematic errors are those errors
    A. which cannot be recognised
    B. whose character is understood
    C. whose effects are cumulative and can be eliminated
    D. none of these
A

C. whose effects are cumulative and can be eliminated

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15
Q

If L is in kilometres, the curvature correction is
A. 58.2 L²
mm
B. 64.8 L² mm
C. 74.8 L²
mm
D. 78.4 L² mm

A

D. 78.4 L² mm

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16
Q

With usual notations, the expression V²/gR represents
A. centrifugal force
B. centrifugal ratio
C. super elevation
D. radial acceleration

A

B. centrifugal ratio

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17
Q

An angle of deflection right, may be directly obtained by
setting the instrument to read
A. zero on back station
B. 180° on back station
C. 90°
D. 270° on back station

A

A. zero on back station

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18
Q

The method of finding out the difference in elevation
between two points for eliminating the effect of curvature
and refraction, is
A. reciprocal levelling
B. precise levelling
C. differential levelling
D. flying levelling

A

A. reciprocal levelling

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19
Q

Transition curves are introduced at either end of a
circular curve, to obtain
A. gradually decrease of curvature from zero at the tangent
point to the specified quantity at the junction of the
transition curve with main curve
B. gradual increase of super-elevation from zero at the
tangent point to the specified amount at the junction of the
transition curve with main curve
C. gradual change of gradient from zero at the tangent point
to the specified amount at the junction of the transition
curve with main curve
D. none of these

A

B. gradual increase of super-elevation from zero at the
tangent point to the specified amount at the junction of the
transition curve with main curve

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20
Q

The horizontal angle between true meridian and
magnetic meridian, is known
A. bearing
B. magnetic declination
C. dip
D. convergence

A

B. magnetic declination

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21
Q

Accuracy of elevation of various points obtained from
contour map is limited to
A. 1/2 of the contour interval
B. 1/4th of the contour interval
C. 1/3rd of the contour interval
D. 1/5th of the contour interval

A

A. 1/2 of the contour interval

22
Q

Magnetic bearing of a survey line at any place
A. remains constant
B. changes systematically
C. varies differently in different months of the year
D. is always greater than true bearing

A

C. varies differently in different months of the year

23
Q

Perpendicularity of an offset may be judged by eye, if
the length of the offset is
A. 5 m
B. 10 m
C. 15 m
D. 20 m

A

C. 15 m

24
Q

The bearings of two traverse legs AB and BC are N52° 45’
E and N34° 30’ E respectively. The deflection angle is
A. 18° 15’ E
B. 18° 15’ N
C. 18° 15’ W
D. 18° 15’ R
E. 18° 15’ L

A

E. 18° 15’ L

25
Q

A lemniscate curve will not be transitional throughout, if
its deflection angle, is
A. 45°
B. 60°
C. 90°
D. 120°
E. 180°

A

A. 45°

26
Q

In a lemniscate curve the ratio of the angle between the
tangent at the end of the polar ray and the straight, and the
angle between the polar ray and the straight, is
A. 2
B. 3
C. 4
D. 5
E. 3/2

A

E. 3/2

27
Q

If V is the speed of a locomotive in km per hour, g is the
acceleration due to gravity, G is the distance between
running faces of the rails and R is the radius of the circular
curve, the required super elevation is

A

d. GV²/gR

28
Q

Ranging in chain survey means
A. looking at an isolated point not on the line
B. establishing an intermediate point on the line
C. determining the distance between end points
D. determining the offset distance
E. none of these

A

B. establishing an intermediate point on the line

29
Q

Accurate measurement of deflection angles with a
transit not properly adjusted may be made by
A. setting the vernier A at zero at back station and then
plunging the telescope
B. setting the vernier A at zero at back station and turning
the instrument to the forward station
C. taking two back sights one with the telescope normal and
the other with telescope inverted
D. none of these

A

C. taking two back sights one with the telescope normal and

30
Q

If whole circle bearing of a line is 120°, its reduced
bearing is
A. S 20° E
B. S 60° E
C. N 120° E
D. N 60° E

A

B. S 60° E

31
Q

Greater accuracy in linear measurements, is obtained by
A. tacheometry
B. direct chaining
C. direct taping
D. all the above

A

C. direct taping

32
Q

From any point on the surface with a given inclination
A. only one contour gradient is possible
B. two contour gradients are possible
C. indefinite contour gradients are possible
D. all the above

A

C. indefinite contour gradients are possible

33
Q

Angles to a given pivot station observed from a number
of traverse stations when plotted, the lines to the pivot
station intersect at a common point
A. angular measurements are correct and not the linear
measurements
B. linear measurements are correct and not the angular
measurements
C. angular and linear measurements are correct and not the
plotting of traverse
D. angular and linear measurements and also plotting of the
traverse are correct

A

D. angular and linear measurements and also plotting of the
traverse are correct

34
Q

Reduced bearing of a line is an angle between
A. north line and given line measured clockwise
B. north line and given line measured anticlockwise
C. east or west and the given line
D. given line and the part of the meridian whether N end or
S end, lying adjacent to it

A

D. given line and the part of the meridian whether N end or
S end, lying adjacent to it

35
Q

While measuring with a metallic tape of 30 m length pull
should be applied
A. 1 kg
B. 2 kg
C. 3 kg
D. 4 kg

A

C. 3 kg

36
Q

The ratio of the radius and apex distance of a curve
deflecting through Δ°, is

A

a. (sec Δ/2 - 1)

37
Q

The ratio of the linear displacement at the end of a line,
subtended by an arc of one second to the length of the line,
is
A. 1:206 300
B. 1:3440
C. 1:57
D. 1:100

A

A. 1:206 300

38
Q

The co-ordinate of a point measured perpendicular to
the parallel, is called
A. total latitude
B. meridian distance
C. total departure
D. consecutive co-ordinate

A

A. total latitude

39
Q

The magnetic meridian at any point, is the direction
indicated by a freely suspended
A. magnetic needle
B. and properly balanced magnetic needle
C. properly balanced and uninfluenced by local attractive
force
D. magnetic needle over an iron pivot

A

C. properly balanced and uninfluenced by local attractive
force

40
Q

If the radius of a simple curve is 600 m, the maximum
length of the chord for calculating offsets, is taken
A. 10 m
B. 15 m
C. 20 m
D. 25 m
E. 30 m

A

E. 30 m

41
Q

α, β are the horizontal angles measured at the ends of a
base line AB to a hill top whose angle of elevation from
station A is θ°. The height of the hill top above the trunnion
axis of the theodolite station, is

A

(AB sin α tan θ) / sin[180° - (α + β)]

42
Q

Correct distance obtained by an erroneous chain is:

A

(erroneous chain length/correct chain length) × observed distance

43
Q

For preparation of a contour plan for a route survey
A. method of squares is used
B. method of trace contour is used
C. method of cross profile is used
D. indirect method of contouring is used

A

C. method of cross profile is used

44
Q

Flint glass
A. has slightly the greater refracting power than crown glass
B. has roughly double refracting power than that of crown
C. and crown glass proportions yield the required focal
length and neutralise the dispersion produced by the convex
lens at the emergence from the concave
D. all the above

A

D. all the above

45
Q

The zero of the graduated circle of a prismatic compass
is located at
A. north end
B. east end
C. south end
D. west end

A

C. south end

46
Q

A standard steel tape of length 30 m and cross-section
15 x 1.0 mm was standardised at 25°C and at 30 kg pull.
While measuring a base line at the same temperature, the
pull applied was 40 kg. If the modulus of elasticity of steel
tape is 2.2 x 106
kg/cm2
, the correction to be applied is
A. - 0.000909 m
B. + 0.0909 m
C. 0.000909 m
D. none of these

A

A. - 0.000909 m

47
Q

The bearing of AB is 190° and that of CB is 260° 30’. The
included angle ABC, is
A. 80° 30’
B. 99° 30’
C. 70° 30’
D. none of these

A

C. 70° 30’

48
Q

The power of a lens
A. is reciprocal of its focal length
B. is positive if it is a convex lens
C. is negative if it is a concave lens
D. is measured in diopter

A

D. is measured in diopter

49
Q

In an adjusted level, when the bubble is central, the axis
of the bubble tube becomes parallel to
A. line of sight
B. line of collimation
C. axis of the telescope
D. None of these

A

A. line of sight

50
Q

If h is the difference in height between end points of a
chain of length l, the required slope correction is

A

h²/2l

TNP VECTORS (4 decks)

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