Surveying (General Engineering) (SSC JE)

Total Questions: 50

31. In a tacheometry, if intercept taken on a vertically held staff is inclined at q to horizontal, the horizontal distance is [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (c) ks cos² q + c cosq
Solution:

When staff is held vertical to ground surface

32. In external focussing telescope with an anallatic lens, for tacheometric survey, the additive constant is [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (a) zero
Solution:

In an anallatic lens for tacheometric survey, the additive constant is zero and multiplying constant is 100.

33. Match List-I with List-II and select the correct answer using the codes given below the Lists : [BPSC AE (GEN. ENGG.) 15.09.2018 ]


Codes:

Correct Answer: (d)
Solution:

34. Spire test is to check which of the following permanent adjustments of theodolite? [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (b) Horizontal axis is perpendicular to vertical axis
Solution:

Spire test– The object of the adjustment is to make the horizontal axis perpendicular to the vertical axis so that it is perfectly, horizontal when the instrument is leveled. This test is known as the spire test.

35. A theodolite is considered to be in proper condition, if [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (d) All of the above
Solution:

The theodolite is said to be in proper condition if the following conditions are satisfied–
1. The axis of plate is perpendicular to the vertical axis.
2. The trunnion axis is perpendicular to the vertical axis.
3. The line of collimation is perpendicular to trunnion axis.
4. The axis of altitude level is parallel to the line of collimation.

36. Pick up the correct feature of accidental error in surveying. [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (d) All of the above
Solution:Accidental error– Accidental errors are those which remain after mistake and systematic errors have been eliminated and are caused by a combination of reasons beyond the ability of the observer to control.

37. The reading taken from an instrument station on a bench-mark of 100.00 RL is 1.2 and the reading taken on next station is 1.70. Then RL of next station is [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (c) 99.50 m
Solution:

38. An imaginary line joining the point of intersection of the crosshairs of the diaphragm and the optical centre of the object glass is known as [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (c) line of collimation
Solution:

Line of collimation–An imaginary line joining the point of intersection of the cross hairs of the diaphragm and the optical center of the object glass.

39. The minor instrument used not only to take horizontal sights but also inclined sights are known as [BPSC AE (GEN. ENGG.) 15.09.2018 ]

Correct Answer: (a) clinometer
Solution:

Clinometer–An inclination or clinometer is an instrument for measuring angles of slope, elevation or depression of an object with respect to gravity.

40. Reduced Level (R.L.) of the floor at building is 74.400 m, staff reading on the floor is 1.625 m and staff reading when it is held inverted with bottom touching the ceiling of a hall is 2.870 m, then the height of the ceiling above the floor is [MPSC AE PRE.-08.07.2018 ]

Correct Answer: (d) 4.495 m
Solution:

Given,
RL = 74.400 m
Staff reading on floor level = 1.625 m
Inverted staff reading of ceiling of hall = 2.870
Height of ceiling above floor level–
H = 1.625 + 2.870 = 4.495 m