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Q1. | Arbitrary bearing is measured by |

A. | Theodolite [Correct Answer] |

B. | Magnetic compass [Wrong Answer] |

C. | Astronomical observations [Wrong Answer] |

D. | Any of the above [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss it below :Himanshu Gupta Said on 2019-06-27 13:41:58from magnetic compass only magnetic bearings are observed. Hence the answer is Theodolite. !! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ Negative errors are caused in chain, when its length is

More than the standard length

Iess than the standard length

Equal to the standard length

Any of the above

⇒ For a curve of radius 100 m and normal chord 10 m, the Rankine's deflection angle, is.

0Â°25'.95

0Â°35'.95

1Â°35'.95

2Â°51'.53.

⇒ The angle between two plane mirrors of optical square, is.

20Â°

30Â°

45Â°

60Â°

⇒ The longitudinal section of the surface of bubble tube is.

straight

circular

parabolic

elliptic.

⇒ Detailed plotting is generally done by

radiation

traversing

resection

all of the above

⇒ If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is

7.5 m

25 m

50

75 m

⇒ In setting up a plane table at any station.

levelling is done first

centering is done first

both levelling and centering are done simultaneously

orientation is done first.

⇒ The rise and fall method of levelling provides a complete check on

backsight

intermediate sight

foresight

all of the above

⇒ The slope correction may be ignored if.

the slope of the ground is less than 3Â°

to slope of the ground is say 1 in 19

both (a) and (b)

neither (a) nor (b)

⇒ The first temporary adjustment of a prismatic compass is

Levelling

Focussing of the prism

Removing the parallax

Centring

⇒ For accurate work, the steel band should always be used in preference to chain because the steel band

is lighter than chain

is easier to handle

is practically inextensible and is not liable to kinks when in use

can be easily repaired in the field

⇒ The second temporary adjustment to be done after setting up the plane table at any station will be

Levelling

Orientation

Centring and levelling done simultaneously

Sighting

⇒ The theodolites used for making tacheometric observations by optical wedge system, are.

provided with stadia hairs in front of eye piece

not provided with stadia hairs at all

fitted with a glass wedge inside the telescope

fitted with a glass wedge in front of telescope.

⇒ 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.

⇒ The line of sight is kept as high above ground surface as possible to minimise the error in the observed angles due to.

shimmering

horizontal refraction

vertical refraction

both shimmering and horizontal refraction.

⇒ If

*D*is the degree of the curve of radius

*R*, the exact length of its specified chord, is.

radius of the curve x sine of half the degree

diameter of the curve x sine of half the degree

diameter of the curve x cosine of half the degree

diameter of the curve x tangent of half the degree.

⇒ The correction to be applied to each 30 metre chain length along θ° slope, is.

30 (sec Î¸ - 1) m

30 (sin Î¸ - 1) m

30 (cos Î¸ - 1) m

30 (tan Î¸ - 1) m

⇒ The slope correction for a 3° slope for a length of 100 m, is.

-0.11 m

-0.11 m

-1.87 m

-0.137 m

⇒ The apparent error on reversal is.

equal to the actual error

twice the actual error

thrice the actual error

none of these.

⇒ In case of a direct vernier scale.

graduations increase in opposite direction in which graduations of the main scale increase

smallest division is longer than smallest division of the main scale

graduations increase in the same direction in which graduations of the main scale increase

none of these.

⇒ With the rise of temperature, the sensitivity of a bubble tube

decreases

increases

remains unaffected

none of the above

⇒ The R.L, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is on the ceiling is 2.745 m, the R.L. of point B will be

94.80 m

99.71 m

100.29 m

105.20 m

⇒ In case of a double line river, contours are.

stopped at the banks of the river

stopped at the edge of the river

drawn across the water

drawn by parabolic curves having their vertex at the centre of the water.

⇒ If the length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, the maximum deflection angle to locate its junction point, is.

1Â°43' 08"

1Â°43' 18"

1Â°43' 28"

1Â°43' 38"

⇒ Two concave lenses of 60 cm focal length are cemented on either side of a convex lens of 15 cm focal length. The focal length of the combination is.

10 cm

20 cm

30 cm

40 cm

⇒ In levelling operation.

if second reading is more than first, it represents a rise

if first reading is more than second, it represents a rise

if first reading is less than second, it represents a fall

both (b) and (c).

⇒ Different grades are joined together by a

compound curve

transition curve

reverse curve

vertical curve

⇒ A bearing of a line is also known as.

magnetic bearing

true bearing

azimuth

reduced bearing

⇒ In centesimal system circumference is divided Into

400 parts

360 parts

180 parts

240 parts

⇒ Contour interval is

inversely proportional to the scale of the map

directly proportional to the flatness of ground

larger for accurate works

larger if the time available is more