SURVEYING MCQS SET 04

SURVEYING MCQS SET 04

1. Accuracy of 'fix' by two point problem, is
A. bad
B. good
C. not reliable
D. unique.
Answer: Option C
 

2. A bearing of a line is also known as
A. magnetic bearing
B. true bearing
C. azimuth
D. reduced bearing
Answer: Option B
 

3.  True meridians are generally preferred to magnetic meridians because
A. these converge to a point
B. these change due to change in time
C. these remain constant.
D. None of these.
Answer: Option C
 

4. Pick up the correct statement from the following :
A. the apparent error on reversal is twice the actual error
B. the correction may be made equal to half the observed discrepancy.
C. the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results
D. all the above.
Answer: Option D
 

5.  If θ is the slope of the ground and l is the measured distance, the correction is
A. 2l sin2 θ/2
B. 2l cos2 θ/2
C. 2l tan2 θ/2
D. 2l cot2 θ/2.
Answer: Option A
 

6. The most reliable method of plotting a theodolite traverse, is
A. by consecutive co-ordinates of each station
B. by independent co-ordinates of each station
C. by plotting included angles and scaling off each traverse leg
D. by the tangent method of plotting.
Answer: Option B
 

7.  The difference of level between a point below the plane of sight and one above, is the sum of two staff readings and an error would be produced equal to
A. the distance between the zero of gradient and the foot of the staff
B. twice the distance between the zero of graduation and the foot of the staff
C. thrice the distance between the zero of graduation and the foot of the staff
D. none of the above.
Answer: Option B
 

8. Offsets are measured with an accuracy of 1 in 40. If the point on the paper from both sources of error (due to angular and measurement errors) is not to exceed 0.05 cm on a scale of 1 cm = 20 m, the maximum length of offset should be limited to
A. 14.14
B. 28.28 m
C. 200 m
D. none of these.
Answer: Option B
 

9. In optical reading instruments
A. the vertical circle is usually continuous from 0° to 359°
B. the readings increase when the telescope is elevated in the face left position
C. the readings decrease when the telescope is elevated in the face right position
D. all the above.
Answer: Option D
 

10.  The bearings of the lines AB and BC are 146° 30' and 68° 30'. The included angle ABC is
A. 102°
B. 78°
C. 45°
D. none of these.
Answer: Option A