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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Vertical photographs are taken from a flying height of 1800 m above the base of a building. The mean photo base is 88 mm and the difference in parallax between the top and base of the building is 2 mm. The building height (Δh = H Δp / (b + Δp)) is:
सही उत्तर: ग) 40 m
Δh = 1800 × 2 / (88 + 2) = 3600/90 = 40 m.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A sidereal day is shorter than a mean solar day by approximately:
सही उत्तर: ख) 3 minutes 56 seconds
A sidereal day is about 23 h 56 min 4 s of mean time, i.e. about 3 min 56 s shorter than a mean solar day.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In astronomical surveying, the point on the celestial sphere vertically above the observer is called the:
सही उत्तर: क) Zenith
The zenith is directly overhead; the nadir is the point directly below the observer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the northern hemisphere, the latitude of an observer can be found approximately by measuring the:
सही उत्तर: घ) Altitude of the pole star (Polaris)
Polaris lies very close to the celestial north pole, whose altitude equals the observer's latitude.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the Universal Transverse Mercator (UTM) system, the scale factor on the central meridian of each zone is:
सही उत्तर: ग) 0.9996
UTM applies a scale factor of 0.9996 at the central meridian so that scale error is distributed across the 6° zone.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Mercator projection is widely used for navigation charts because it is:
सही उत्तर: ख) Conformal, so that lines of constant bearing appear as straight lines
Mercator preserves angles (conformal), so rhumb lines plot as straight lines, though areas are exaggerated near the poles.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The reference ellipsoid traditionally used for the geodetic datum of Nepal is the:
सही उत्तर: क) Everest 1830 ellipsoid
Nepal's national geodetic datum is based on the Everest (1830) ellipsoid, inherited from the Survey of India.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Nepal's national maps use the Modified UTM (MUTM) projection, in which each zone has a width of:
सही उत्तर: घ) 3° of longitude
MUTM in Nepal uses 3° zones with central meridians at 81°, 84° and 87° E, reducing scale distortion compared with 6° UTM zones.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The longitude of a place is:
सही उत्तर: ग) The angle measured along the equator between the prime meridian and the meridian of the place
Longitude is measured east or west of the Greenwich (prime) meridian; latitude is measured from the equator.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Laplace station in a triangulation network is a station at which:
सही उत्तर: ख) Astronomical azimuth and longitude are observed to control the azimuths of the network
Laplace stations provide astronomical azimuth checks that prevent the accumulation of azimuth errors in triangulation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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