21) If the base of the object is inaccessible, in trigonometric levelling method to be used is
(a) single plane method
(b) double plane method
(c) any of the above two
(d) none of (a) and (b)
22) Three problem can be solved by
a) Tracing paper method
b) Bessels method
c) Lehman;s method
d) All of these
23) By balancing back sight and foresight the errors eliminated are
(a) errors due to non-parallelism of line of collimation and axis of bubble tube
(b) error due to curvature and refraction
(c) both (a) and (b)
(d) none of (a) and (b)
24) Which of the following methods of plane tabling also known as ‘’ graphic triangulation’’
a) Intersection
b) Resection
c) Traversing
d) Radiation
25) The bearing S 25° W means ____ in whole circle bearing
(a) 155°
(b) 205°
(c) 115°
(d) 335°
26) Which one of the following methods estimates best the area of an irregular and curved boundary ?
a) Trapezoidal method
b) Simpson’s method
c) Average ordinate method
d) Mid-ordinate method
27) When the length of chain used in measuring distance is shorter than the standard length, the error
in measured length is
(a) positive error
(b) negative error
(c) compensating error
(d) none of these
28) The shape of the vertical curve generally provided is
a) circular
b) parabolic
c) spiral
d) elliptical
29) The length of long chord and tangents of a circular curve are equal for deflection angle of
a) 300
b) 600
c) 900
d) 1200
30) The limited minimum declination of a circumpolar star having latitude 400 N is
a) 400
b) 500
c) 900
d) 00
31) The instrument which is attached to the wheel of a cycle to record the number of revolutions made for the purpose of approximate measurement is known as
(a) passometer
(b) pedometer
(c) odometer
(d) speedometer
All The Best!!