Civil Engineering All Engineering Career
Question 51
In measuring horizontal angles, the theodolite should be turned ?
In measuring horizontal angles, the theodolite should be turned "clockwise from the back station to the forward station."
This ensures that the angle is measured correctly between the two stations, typically following the convention for angle measurement in surveying.
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Question 52
When the centres of the arcs lie on the opposite sides of the common tangent at the junction the two curves, it is known as a ?
The correct answer is "reverse curve."
A reverse curve is a type of curve where the centers of the arcs lie on opposite sides of the common tangent at the junction of the two curves. This creates a change in direction that typically appears as two curves bent in opposite directions.
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Question 53
In the surveying telescope, diaphragm is held ?
nearer to the eye piece
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Question 54
When the cross-hairs are not clearly visible ?
When the cross-hairs are not clearly visible, "the eyepiece should be focused."
Focusing the eyepiece adjusts the clarity of the cross-hairs and ensures that they are sharply visible for accurate observation and measurement.
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Question 55
The angle of field of the telescope ?
all of the above
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Question 56
The operation of turning the table so that all the lines on the paper are parallel to the corresponding lines on the ground, is called ?
The operation of turning the table so that all the lines on the paper are parallel to the corresponding lines on the ground is called orientation.
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Question 57
In order to measure a horizontal angle more accurately than a vernier, a ?
In order to measure a horizontal angle more accurately than with a vernier, the method of repetition is used.
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Question 58
A fixed point of reference of known elevation is called ?
A fixed point of reference of known elevation is called a benchmark. Benchmarks are used in surveying and mapping as reference points for measuring and determining elevations.
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Question 59
The error in measured length due to incorrect holding of chain is ?
The error in measured length due to incorrect holding of a chain is known as a compensating error. This type of error occurs when the method of measurement or the handling of the measuring instrument leads to inaccuracies that may be corrected or adjusted for in subsequent measurements.
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Question 60
The error in measured length due to incorrect holding of chain is ?
The limiting length of the offset when its perpendicular direction is set out by eye is typically 15 meters. This limit helps ensure that the offset remains reasonably accurate despite the limitations of visual alignment.
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