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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Remote sensing in surveying and mapping refers to:
सही उत्तर: ख) Obtaining information about the earth's surface without physical contact, e.g. from satellite or aerial sensors
Remote sensing acquires data by sensors on aircraft or satellites that record reflected or emitted energy, without touching the objects.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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On a contour map, contours that are closely spaced at higher elevations and widely spaced at lower elevations represent a:
सही उत्तर: ख) Concave slope
A concave slope is steep near the top and gentle near the bottom, so contours crowd together at the higher levels.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A line laid out on the ground surface maintaining a constant inclination to the horizontal, as for a hill road or canal, is called a:
सही उत्तर: क) Contour gradient
A contour gradient (grade contour) is a line on the ground with a uniform specified slope, set out using a level, Abney level or tangent clinometer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The permanent adjustment of a dumpy level that is carried out first is to make:
सही उत्तर: ख) The axis of the bubble tube perpendicular to the vertical axis
First the bubble axis is made perpendicular to the vertical axis; then the line of collimation is made parallel to the bubble axis.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A back sight of 1.500 m is taken on a benchmark of RL 200.000 m. The height of instrument is:
सही उत्तर: ख) 201.500 m
HI = RL of benchmark + back sight = 200.000 + 1.500 = 201.500 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When the bubble of a level is moved through 4 divisions, the staff reading at 100 m changes by 0.04 m. The angular value of one division of the bubble is about:
सही उत्तर: ख) 20.6 seconds
α = s/(nD) = 0.04/(4 × 100) = 0.0001 rad = 0.0001 × 206265 ≈ 20.6 seconds.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The correction for the curvature of the earth in levelling is always:
सही उत्तर: क) Subtractive, because the staff reading is too large
The horizontal line of sight rises above the level surface, so the staff reading is too large and the correction is negative.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An observer's eye is 9 m above sea level. Using d = 3.855 √h (d in km, h in m), the distance to the visible horizon is about:
सही उत्तर: ख) 11.6 km
d = 3.855 × √9 = 3.855 × 3 ≈ 11.6 km.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The correction for atmospheric refraction in levelling, for a distance D in km, is:
सही उत्तर: घ) +0.0112 D² m (additive)
Refraction bends the line of sight down towards the earth; its correction is about one-seventh of the curvature correction, +0.0112 D².
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Levelling carried out at right angles to the centre line of a proposed road or canal at regular intervals is called:
सही उत्तर: घ) Cross-sectioning
Cross-sections give ground levels perpendicular to the centre line for computing earthwork.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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