इन्जिनियरिङ सेवा सब-इन्जिनियर (पाँचौँ तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – सब-इन्जिनियर (पाँचौँ तह)
Sub-Engineer – 5th Level · Engineering Service
१,५०३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
प्राविधिक पत्र: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ५ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / 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)
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Fly levelling is carried out to:
सही उत्तर: ग) Quickly carry levels to an approximate value or check the levels of benchmarks, without intermediate sights
Fly levelling is rapid levelling using only back and fore sights, used for reconnaissance or checking.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The height of instrument is 101.500 m. A staff held inverted against the ceiling of a tunnel reads 2.000 m. The RL of the ceiling point is:
सही उत्तर: घ) 103.500 m
For an inverted staff, RL = HI + reading = 101.500 + 2.000 = 103.500 m.
💬 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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