सर्भेक्षण – Surveying MCQ
सर्भेक्षण – सिभिल इन्जिनियरिङ
Surveying · Civil Engineering · १,५६५ प्रश्न
१,५६५ प्रश्न उपलब्ध। मोड छान्नुहोस्:
सर्भेक्षण: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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Which triangulation figure gives the strongest and most accurate system, though it requires more observations?
सही उत्तर: घ) Braced quadrilateral
Braced quadrilaterals provide many redundant checks and alternative routes of computation, giving the greatest strength.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Bilby tower, used in triangulation, is a:
सही उत्तर: क) Portable steel tower with separate inner and outer frames for the instrument and the observer
The Bilby tower has two independent frameworks so the observer's movement does not disturb the instrument, elevating the line of sight above obstacles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A heliotrope is used in triangulation to:
सही उत्तर: ख) Reflect the sun's rays towards a distant station so that it can be sighted
The heliotrope is a luminous signal that directs sunlight by a mirror to the observing station, making very long sights possible.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 'base net' in triangulation is used to:
सही उत्तर: क) Expand a short measured base line into a longer side of the main triangulation
Through a series of well-conditioned triangles, a base net extends a short, accurately measured base to the longer sides of the main network.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a triangulation system, primary (first-order) triangulation is characterised by:
सही उत्तर: क) The longest sides and the highest precision
Primary triangulation covers large areas with long sides and the highest accuracy; secondary and tertiary nets fill in with shorter sides.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The tracing paper method in plane tabling is used to solve the:
सही उत्तर: ग) Three-point problem
Rays to three known points are drawn on tracing paper, which is then moved until the rays pass through the plotted points, fixing the station.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A telescopic alidade is preferred over a plain alidade in plane tabling because it:
सही उत्तर: ख) Allows longer and inclined sights and tacheometric measurement of distances and elevations
The telescope gives a clear view over long distances and on slopes, and with stadia hairs it can also measure distances and heights.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Bessel's method in plane tabling is a graphical solution of the:
सही उत्तर: ख) Three-point problem
Bessel's method uses back-sighting along lines through the plotted points to locate the occupied station in the three-point problem.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a tacheometric observation, the RL of the instrument axis is 100.500 m, the computed vertical component V is +5.200 m and the middle hair reading on the staff is 1.500 m. The RL of the staff station is:
सही उत्तर: ग) 104.200 m
RL = RL of axis + V − middle hair reading = 100.500 + 5.200 − 1.500 = 104.200 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A tacheometer with K = 100 and C = 0 is used with the line of sight inclined at 10° and a vertical staff. The staff intercept is 1.20 m. The horizontal distance is about:
सही उत्तर: क) 116.4 m
D = Ks cos²θ = 100 × 1.20 × cos²10° = 120 × 0.9698 ≈ 116.4 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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