इन्जिनियरिङ सेवा सिभिल इन्जिनियर (सातौँ तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – सिभिल इन्जिनियर (सातौँ तह)
Civil Engineer – 7th Level · Engineering Service
१,९४० 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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Two grades of +2% and −1% are to be joined by a vertical curve with a rate of change of grade of 0.1% per 20 m. The length of the vertical curve is:
सही उत्तर: ग) 600 m
Total change of grade = 2 − (−1) = 3%; number of 20 m stations = 3/0.1 = 30; length = 30 × 20 = 600 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The two-theodolite method of setting out a circular curve is particularly useful when:
सही उत्तर: ख) The ground is rough and linear measurements are difficult
The method fixes each peg by intersecting angles from two theodolites at the tangent points, requiring no chaining.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A curve has a degree of 2° defined on a standard arc of 20 m. Its radius is about:
सही उत्तर: घ) 573 m
R = 20/(2° in radians) = 20/0.0349 ≈ 573 m (i.e., R = 1146/D for a 20 m arc).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Rankine's method, the tangential angle (in minutes) for a chord c on a curve of radius R is 1718.9 c/R. For c = 20 m and R = 400 m, it is about:
सही उत्तर: क) 1°25.9'
δ = 1718.9 × 20/400 = 85.9 minutes = 1°25.9'.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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For a simple circular curve of radius 200 m and deflection angle 60°, the mid-ordinate R(1 − cos Δ/2) is about:
सही उत्तर: ख) 26.8 m
M = 200 × (1 − cos 30°) = 200 × (1 − 0.866) = 26.8 m.
💬 टिप्पणी / गल्ती रिपोर्ट (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)
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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