The following instrument is used to set out a right angle (a) Cross staff (b) Optical staff (c) Prism square (d) None of the above (e) All the above*

The following instrument is used to set out a right angle
(a) Cross staff
(b) Optical staff
(c) Prism square
(d) None of the above
(e) All the above*
by

1 Answer

Answer :

e) All the above*
by

Related questions

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Cross sectional area of catch water drain should not be more than a) 0 .75 square meter* b) 0. 90 square meter c) 0. 80 square meter d). 50 square meter

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The method of plane tabling commonly used for establishing the instrument station is a method of (a) Radiation (b) Intersection* (c) Resection (d) Traversing

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Skew of a bridge is the angle between a) C.L. of water course to C.L. of track b) C.L. of water course to C.L. of pier c) C.L. of water course/road to normal (perpendicular) of C.L. of track* d) C.L. of abutment to C.L. of pier

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The angle between two plane mirrors of optical square, is (A) 20° (B) 30° (C) 45° (D) 60°

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Which one of the following statements is not correc t? (a) Parallax error is eliminated when there is no change in the staff reading when eye is moved up and down (b) The objective lens is to be focused towards a white or bright background for clear visibility of cross-hairs (c) Temporary adjustments of the dumpy level are to be performed at every set up (d) The eyepiece need not be adjusted after the first set up when the same surveyor is taking readings

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Draw sketch and write the procedure for setting offset to the left or right side of suvey line with open cross-staff.

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Renewal of slack rivets should be taken up in steel girder bridges: a) All rivets which are hand loose or which have lost 50% of their head by corrosion. b) All hammer loose rivets where corrosion has set in between the head and the plate. c) In end stiffeners when the percentage of hammer loose rivets is >30% d) All the above*

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