इन्जिनियरिङ सेवा सिभिल इन्जिनियर (सातौँ तह) – प्राविधिक पत्र
इन्जिनियरिङ सेवा – सिभिल इन्जिनियर (सातौँ तह)
Civil Engineer – 7th 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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Spherical excess in a spherical triangle amounts to about 1 second for every:
सही उत्तर: क) 196 km² of area
Spherical excess ≈ 1" per 196 km², so it matters only in large geodetic triangles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In triangulation, the 'phase correction' is applied because:
सही उत्तर: क) One side of a cylindrical signal is illuminated by the sun, so the observer bisects the bright part rather than the centre
Phase is the error of bisecting the apparently brighter portion of a signal; the correction reduces the sight to the signal's centre.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In triangulation, a satellite station is used when:
सही उत्तर: ग) The main station cannot be occupied by the instrument although it can be sighted
An eccentric (satellite) station is set up close to the main station and observations are reduced to the main station.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A major limitation of plane table surveying is that it:
सही उत्तर: क) Is unsuitable in wet or windy weather and in thickly wooded country
Since plotting is done on paper in the field, rain, wind and dense vegetation seriously hamper plane tabling.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In resection by plane table, when the back rays from three known points do not meet at one point, the small triangle formed is called the:
सही उत्तर: क) Triangle of error
The triangle of error indicates incorrect orientation; it is removed by trial (e.g. Lehmann's rules) until the rays meet at a point.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 'two-point problem' in plane tabling is to locate the station occupied by the plane table from:
सही उत्तर: ग) Two visible, already plotted points, using an auxiliary station
With only two known points visible, an auxiliary station is used to obtain the correct orientation and position.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In stadia tacheometry with an inclined line of sight θ and a vertical staff, the vertical component V is given by:
सही उत्तर: क) V = ½ Ks sin 2θ + C sin θ
The vertical component is V = ½ Ks sin 2θ + C sin θ, while the horizontal distance is Ks cos²θ + C cos θ.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Tacheometric surveying is particularly suitable for:
सही उत्तर: घ) Rough, hilly or broken ground where chaining is difficult
Tacheometry obtains distances and elevations optically, avoiding slow and inaccurate chaining over obstacles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the tangential method of tacheometry, distance and elevation are found by:
सही उत्तर: घ) Measuring vertical angles to two vanes a known distance apart on the staff
The tangential method does not use stadia hairs; two vertical angles to targets at known spacing give distance and height.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the subtense bar method of tacheometry using a 2 m bar, the horizontal angle subtended is 0.01 radian. The horizontal distance is about:
सही उत्तर: ख) 200 m
D = (s/2) cot(θ/2) = 1 × cot(0.005) ≈ 200 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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