31. The correction for sag is_________________? A. always additive B. always subtractive C. always zero D. sometimes additive and sometimes subtractive ✅ The correct answer is option B.
32. Transit rule of adjusting the consecutive coordinates of a traverse is used where________________? A. linear and angular measurements of the traverse are of equal accuracy B. angular measurements are more accurate than linear measurements C. linear measurements are more accurate than angular measurements D. all of the above ✅ The correct answer is option B.
33. The resection by two point problem as compared to three point problem_______________? A. gives more accurate problem B. takes less time C. requires more labour D. none of the above ✅ The correct answer is option C.
34. Normal tension is that pull which_______________? A. is used at the time of standardising the tape B. neutralizes the effect due to pull and sag C. makes the correction due to sag equal to zero D. makes the correction due to pull equal to zero ✅ The correct answer is option B.
35. A negative declination shows that the magnetic meridian is to the________________? A. eastern side of the true meridian B. western side of the true meridian C. southern side of the true meridian D. none of the above ✅ The correct answer is option B.
36. The maximum tolerance in a 20 m chain is_______________? A. ±2 mm B. ±3 mm C. ±5 mm D. ±8 mm ✅ The correct answer is option C.
37. Closed contours, with higher value inwards, represent a_______________? A. depression B. hillock C. plain surface D. none of the above ✅ The correct answer is option B.
38. For which of the following permanent adjustments of theodolite, the spire test is used ? A. adjustment of plate levels B. adjustment of line of sight C. adjustment of horizontal axis D. adjustment of altitude bubble and vertical index frame ✅ The correct answer is option C.
39. Which of the following angles can be set out with the help of French cross staff? A. 45° only B. 90° only C. either 45° or 90° D. any angle ✅ The correct answer is option C.
40. Which of the following methods of plane table surveying is used to locate the position of an inaccessible point ? A. radiation B. intersection C. traversing D. resection ✅ The correct answer is option B.