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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The 'zero circle' of a polar planimeter is the circle along which the tracing point moves:
सही उत्तर: घ) Without any rotation of the measuring wheel
Along the zero circle the wheel slides without rolling; its area is added when the anchor point is inside the figure.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a mass haul diagram for earthwork, a rising curve (ordinates increasing along the chainage) indicates:
सही उत्तर: ग) Excavation (cutting)
Mass haul ordinates are cumulative volumes with cut positive, so a rising curve represents cutting and a falling curve filling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the spot level (borrow pit) method of computing volume over a grid of equal rectangles of area A, the volume is:
सही उत्तर: क) (A/4)(Σh1 + 2Σh2 + 3Σh3 + 4Σh4), where hn are depths common to n rectangles
Each corner depth is weighted by the number of rectangles it belongs to, and the total is multiplied by A/4.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Ordinates of 2, 3, 4, 5 and 6 m are taken at equal intervals along a 40 m base line. By the average ordinate rule, the area is:
सही उत्तर: ख) 160 m²
Average ordinate = (2+3+4+5+6)/5 = 4 m; area = 4 × 40 = 160 m².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Using the approximate formula offset = x²/(2R), the perpendicular offset from the tangent at 20 m from the tangent point for a curve of radius 200 m is:
सही उत्तर: ख) 1.0 m
Offset = 20² / (2 × 200) = 400 / 400 = 1.0 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A vertical curve formed where a falling (descending) gradient meets a rising (ascending) gradient is a:
सही उत्तर: ख) Valley (sag) curve
Valley or sag curves occur where the road changes from down-grade to up-grade, forming a low point.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Superelevation (cant) is provided on horizontal curves of roads and railways to:
सही उत्तर: ग) Counteract the effect of centrifugal force on vehicles
Raising the outer edge introduces a component of weight towards the centre, balancing centrifugal force.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The shift of a circular curve due to a transition curve of length L and radius R is approximately L²/(24R). For L = 60 m and R = 300 m, the shift is:
सही उत्तर: घ) 0.5 m
Shift = 60² / (24 × 300) = 3600 / 7200 = 0.5 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A curve consisting of two circular arcs bending in opposite directions, with a common tangent at the junction, is a:
सही उत्तर: ग) Reverse curve
In a reverse (serpentine) curve, the arcs curve in opposite directions; a compound curve bends in the same direction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The point of intersection of two straights has chainage 1000.0 m and the tangent length of the curve is 109.2 m. The chainage of the point of curvature (beginning of curve) is:
सही उत्तर: ख) 890.8 m
Chainage of PC = chainage of PI − tangent length = 1000.0 − 109.2 = 890.8 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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