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ISRO CE Quiz 2- Surveying

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Question 1

B and C are two points on the opposite banks of a river along a chain line ABC which crosses the river at right angles to the bank. From a point P which is 150 m from B along the bank, the bearing of A is 215 ° 30' and the bearing of C is 305 ° 30'. If the length AB is 200 m, the width (in m) of the river is

Question 2

Two ships are moving towards a port in a line. The observer at Ship A is able to see the base of 49 m high light house and the observer at Ship B is able to see the head of the observer at Ship A. The height of light house that is visible to observer at Ship B is __________ m.
[Take height of the observer's eye/head above mean sea level on both ships to be 9 m]

Question 3

Which of the following errors are fully eliminated by reciprocal leveling?
I. Error due to Earth's curvature
II. Error due to inclined line of sight
III. Error due to refraction

Question 4

If the sensitivity of the bubble tube of a level is 30" of arc per division, then the distance of a point at which the combined curvature and refraction corrections become numerically equal to the error induced by dislevelment of one division of the level tube (in m) is

Question 5

A flag post was erected on the top of a building. If vertical angle to bottom and top of the flag post are 8 ° and 9 ° respectively, then the height of the flag post is ___________ decimeter.
[Assume R.L. of top and bottom of building to be 184.4 m and 145.2 m respectively, height of instrument to be 1.2 m and width of the building is very less as compared to the distance to the building and the theodolite]

Question 6

The following measurements were made during testing a leveling instrument.

P₁ is close to P and P₂ is close to Q. If the reduced level of station P is 100.000m, the reduced level of station Q is

Question 7

Curvature correction to a staff reading in a differential leveling survey is

Question 8

A theodolite is set up at station A and a 3 m long staff is held vertically at station B. The depression angle reading at 2.5 m making on the staff is 6 °10 ¢. The horizontal distance between A and B is 2200m. Height of instrument at station A is 1.1 m and R.L. of A is 880.88 m. Apply the curvature and refraction correction, and determine the R.L. of B (in m). ____

Question 9

In a survey work, three independent angle, X, Y and Z were observed with weight W_X, W_Y, W_z respectively. The weight of the sum of angles X, Y and Z is given by:

Question 10

The length of Summit Curve on a two-lane two-way highway depends upon

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ESE & GATE CE Surveying

Nov 15ESE & GATE CE