Civil Engineering MCQs

Page No. 272

The prismatic compass and surveyor’s compass________________?


agive whole circle bearing (WCB. of a line and quadrantal bearing (QB. of a line respectively


bboth give QB of a line and WCB of a line


cboth give QB of a line


dboth give WCB of a line



Local attraction in compass surveying may exist due to________________?


a incorrect levelling of the magnetic needle


b loss of magnetism of the needle


cfriction of the needle at the pivot


dpresence of magnetic substances near the instrument



The horizontal angle between the true meridian and magnetic meridian at a place is called______________?


aazimuth


bdeclination


clocal attraction


dmagnetic bearing


View Answer declination

In the quadrantal bearing system, a whole circle bearing of 293° 30′ can be expressed as______________?


aW23°30’N


bN66°30’W


cS113°30’N


dN23°30’W


View Answer N66°30’W

In the prismatic compass______________?


a the magnetic needle moves with the box


b the line of the sight does not move with the box


c the magnetic needle and graduated circle do not move with the box


d the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction



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


ais lighter than chain


b is easier to handle


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


dcan be easily repaired in the field



The maximum tolerance in a 20 m chain is_______________?


a±2 mm


b ±3 mm


c±5 mm


d ±8 mm


View Answer ±5 mm

The length of a chain is measured from_______________?


acentre of one handle to centre of other handle


b outside of one handle to outside of other handle


coutside of one handle to inside of other handle


d inside of one handle to inside of other handle



If the true bearing of a line AB is 269° 30′, then the azimuth of the line AB is_____________?


a0° 30′


b 89° 30′


c90° 30′


d269° 30′


View Answer 90° 30′

For a line AB_______________?


athe forebearing of AB and back bearing of AB differ by 180°


b the forebearing of AB and back bearing of BA differ by 180°


cboth (A. and (B. are correct.


dnone is correct



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