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Q1. | Contour lines of different elevations can unite to form one line, only in the case of. |

A. | a vertical cliff [Correct Answer] |

B. | a saddle [Wrong Answer] |

C. | a water shed line [Wrong Answer] |

D. | a hill top. [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ An ideal transition curve is.

cubic parabola

cubic spiral

clothoid spiral

true spiral.

⇒ Direct method of contouring is

a quick method

adopted for large surveys only

most accurate method

suitable for hilly terrains

⇒ In levelling operation,

The first sight on any change point is a back sight

The second sight on any change point is a fore sight

The line commences with a fore sight and closes with a back sight

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

⇒ Determining the difference in elevation between two points on the surface of the earth, is known as.

levelling

simple levelling

differential levelling

longitudinal levelling.

⇒ Rankine's deflection angle in minutes is obtained by multiplying the length of the chord by.

degree of the curve

square of the degree of the curve

inverse of the degree of the curve

none of these.

⇒ The defect of a lens whereby rays of white light proceeding from a point get dispersed into their components and conveyed to various foci, forming a blurred and coloured image is known as.

chromatic aberration

spherical aberration

astigmatism

coma.

⇒ The power of a lens.

is reciprocal of its focal length

is positive if it is a convex lens

is negative if it is a concave lens

is measured in diopter.

⇒ Simpson's rule for calculating areas states that the area enclosed by a curvilinear figure divided into an even number of strips of equal width, is equal to.

half the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets, and thrice the sum of the even offsets

one third the width of a strip, multiplied by the sum of two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets

one third the width of a strip, multiplied by the sum of two extreme offsets, four times the sum of the remaining odd offsets, and twice the sum of the even offsets

one sixth the width of a strip, multiplied by the sum of the two extreme offsets, twice the sum of remaining odd offsets and four times the sum of the even offsets

⇒ The correction to be applied for eliminating the effect of earth's curvature is

Additive

Subtractive

Compensating

Cumulative

⇒ Systematic errors are those errors.

which cannot be recognised

whose character is understood

whose effects are cumulative and can be eliminated

none of these.

⇒ A clinometer is used for.

measuring angle of slope

correcting line of collimation

setting out right angles

defining natural features.

⇒ The box of prismatic compass is made of

Steel

Brass

Iron

Aluminium

⇒ Pick up the correct statement from the following :

The horizontal angle between magnetic meridian and true meridian at a place is called magnetic declination or variance of the compass

the imaginary lines which pass through points at which the magnetic declinations are equal at a given time are called isogonic lines

the isogonic lines through places at which the declination is zero are termed agonic lines

all the above.

⇒ For true difference in elevations between two points

*A*and

*B*, the level must be set up.

at any point between A and B

at the exact mid point of A and B

near the point A

near the point B.

⇒ Which of the following methods of offsets involves less measurement on the ground?

method of perpendicular offsets

method of oblique offsets

method of ties

all involve equal measurement on the ground

⇒ A series of closely spaced contour lines represents a

steep slope

gentle slope

uniform slope

plane surface

⇒ The first reading from a level station is.

foresight

intermediate sight

back-sight

any sight.

⇒ Metallic tapes are made of

Steel

Invar

Cloth and Nvires

Nickel

⇒ Short offsets are measured with.

an ordinary chain

an invar tape

a metallic tape

a steel tape.

⇒ Pick up the correct statement from the following :

in astronomical telescope, the rays from the object after refraction at the objective are brought to a focus before entering the eyepiece to produce a real inverted image in front of the eye piece

in Galileo's telescope, the rays from the object get refracted at the objective and are intercepted by the eyepiece before a real image is formed

a line passing through the optical centre of the objective traversing through the eyepiece, is called line of sight

all the above.

⇒ is a conventional sign of.

mosque

temple

church

idgah.

⇒ The total number of zeroes graduated on a surveyor's compass is

One

Two

Three

Four

⇒ The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known.

a simple curve

a compound curve

a reverse curve

a vertical curve.

⇒ Pick up the correct statement from the following :

the apparent error on reversal is twice the actual error

the correction may be made equal to half the observed discrepancy.

the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results

all the above.

⇒ The adjustment of horizontal cross hair is required particularly when the instrument is used for

leveling

prolonging a straight line

measurement of horizontal angles

all of the above

⇒ Select the correct statement.

A contour is not necessarily a closed curve.

A contour represents a ridge line if the concave side of lower value con¬tour lies towards the higher value contour.

Two contours of different elevations do not cross each other except in case of an overhanging cliff.

All of the above statements are correct.

⇒ The surface of zero elevation around the earth, which is slightly irregular and curved, is known as.

mean sea level

geoid surface

level surface

horizontal surface.

⇒ Which of the following errors can be neutralised by setting the level midway between the two stations ?

error due to curvature only

error due to refraction only

error due to both curvature and re-fraction

none of the above

⇒ Which of the following angles can be set out with the help of French cross staff?

45° only

90° only

either 45° or 90°

any angle

⇒ Optical reading instruments.

the vertical circle is usually continuous from 0Â° to 359Â°

the readings increase when the telescope is elevated in the face left position

the readings decrease when the telescope is elevated in the face right position

all the above.